Don't import/export chronos by default (#20)
Chronos support is optional and should not have to be imported in order to use faststreams for non-async use cases, as doing so pollutes the global namespace and slows down compilation. `async` support must now explicitly be enabled with -d:async_backend=chronos|asyncdispatch
This commit is contained in:
Jacek Sieka
GitHub
parent
5eb7fd0c90
commit
3a0ab42573
10 changed files with 841 additions and 705 deletions
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@ -1,14 +1,25 @@
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const
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faststreams_async_backend {.strdefine.} = "chronos"
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# To compile with async support, use `-d:async_backend=chronos|asyncdispatch`
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async_backend {.strdefine.} = "none"
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const
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faststreams_async_backend {.strdefine.} = ""
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when faststreams_async_backend != "":
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{.fatal: "use `-d:async_backend` instead".}
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type
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CloseBehavior* = enum
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waitAsyncClose
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dontWaitAsyncClose
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const debugHelpers* = defined(debugHelpers)
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const
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debugHelpers* = defined(debugHelpers)
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fsAsyncSupport* = async_backend != "none"
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when faststreams_async_backend == "chronos":
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when async_backend == "none":
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discard
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elif async_backend == "chronos":
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import
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chronos
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@ -18,10 +29,10 @@ when faststreams_async_backend == "chronos":
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template fsAwait*(f: Future): untyped =
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await f
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elif faststreams_async_backend in ["std", "asyncdispatch"]:
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elif async_backend in ["std", "asyncdispatch"]:
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import
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std/asyncdispatch
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export
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asyncdispatch
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@ -36,7 +47,7 @@ elif faststreams_async_backend in ["std", "asyncdispatch"]:
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type Duration* = int
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else:
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{.fatal: "Unrecognized network backend: " & faststreams_async_backend.}
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{.fatal: "Unrecognized network backend: " & async_backend.}
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when defined(danger):
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template fsAssert*(x) = discard
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@ -22,8 +22,9 @@ type
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maxBufferedBytes*: Natural
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queue*: Deque[PageRef]
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waitingReader*: Future[void]
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waitingWriter*: Future[void]
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when fsAsyncSupport:
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waitingReader*: Future[void]
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waitingWriter*: Future[void]
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eofReached*: bool
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fauxEofPos*: Natural
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@ -6,16 +6,73 @@ import
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export
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options, CloseBehavior
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type
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InputStream* = ref object of RootObj
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vtable*: ptr InputStreamVTable # This is nil for unsafe memory inputs
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buffers*: PageBuffers # This is nil for unsafe memory inputs
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span*: PageSpan
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spanEndPos*: Natural
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closeFut*: Future[void] # This is nil before `close` is called
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when debugHelpers:
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name*: string
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when fsAsyncSupport:
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# Circular type refs prevent more targeted `when`
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type
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InputStream* = ref object of RootObj
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vtable*: ptr InputStreamVTable # This is nil for unsafe memory inputs
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buffers*: PageBuffers # This is nil for unsafe memory inputs
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span*: PageSpan
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spanEndPos*: Natural
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closeFut*: Future[void] # This is nil before `close` is called
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when debugHelpers:
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name*: string
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AsyncInputStream* {.borrow: `.`.} = distinct InputStream
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ReadSyncProc* = proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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ReadAsyncProc* = proc (s: InputStream, dst: pointer, dstLen: Natural): Future[Natural]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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CloseSyncProc* = proc (s: InputStream)
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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CloseAsyncProc* = proc (s: InputStream): Future[void]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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GetLenSyncProc* = proc (s: InputStream): Option[Natural]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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InputStreamVTable* = object
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readSync*: ReadSyncProc
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closeSync*: CloseSyncProc
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getLenSync*: GetLenSyncProc
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readAsync*: ReadAsyncProc
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closeAsync*: CloseAsyncProc
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MaybeAsyncInputStream* = InputStream | AsyncInputStream
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else:
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type
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InputStream* = ref object of RootObj
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vtable*: ptr InputStreamVTable # This is nil for unsafe memory inputs
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buffers*: PageBuffers # This is nil for unsafe memory inputs
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span*: PageSpan
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spanEndPos*: Natural
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when debugHelpers:
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name*: string
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ReadSyncProc* = proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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CloseSyncProc* = proc (s: InputStream)
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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GetLenSyncProc* = proc (s: InputStream): Option[Natural]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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InputStreamVTable* = object
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readSync*: ReadSyncProc
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closeSync*: CloseSyncProc
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getLenSync*: GetLenSyncProc
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MaybeAsyncInputStream* = InputStream
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type
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LayeredInputStream* = ref object of InputStream
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source*: InputStream
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allowWaitFor*: bool
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@ -23,30 +80,6 @@ type
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InputStreamHandle* = object
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s*: InputStream
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AsyncInputStream* {.borrow: `.`.} = distinct InputStream
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ReadSyncProc* = proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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ReadAsyncProc* = proc (s: InputStream, dst: pointer, dstLen: Natural): Future[Natural]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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CloseSyncProc* = proc (s: InputStream)
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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CloseAsyncProc* = proc (s: InputStream): Future[void]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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GetLenSyncProc* = proc (s: InputStream): Option[Natural]
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{.nimcall, gcsafe, raises: [IOError, Defect].}
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InputStreamVTable* = object
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readSync*: ReadSyncProc
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readAsync*: ReadAsyncProc
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closeSync*: CloseSyncProc
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closeAsync*: CloseAsyncProc
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getLenSync*: GetLenSyncProc
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MemFileInputStream = ref object of InputStream
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file: MemFile
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@ -54,30 +87,38 @@ type
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file: File
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template Sync*(s: InputStream): InputStream = s
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template Async*(s: InputStream): AsyncInputStream = AsyncInputStream(s)
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template Sync*(s: AsyncInputStream): InputStream = InputStream(s)
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template Async*(s: AsyncInputStream): AsyncInputStream = s
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when fsAsyncSupport:
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template Async*(s: InputStream): AsyncInputStream = AsyncInputStream(s)
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template Sync*(s: AsyncInputStream): InputStream = InputStream(s)
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template Async*(s: AsyncInputStream): AsyncInputStream = s
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proc disconnectInputDevice(s: InputStream) =
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# TODO
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# Document the behavior that closeAsync is preferred
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if s.vtable != nil:
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if s.vtable.closeAsync != nil:
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s.closeFut = s.vtable.closeAsync(s)
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elif s.vtable.closeSync != nil:
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s.vtable.closeSync(s)
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when fsAsyncSupport:
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if s.vtable.closeAsync != nil:
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s.closeFut = s.vtable.closeAsync(s)
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elif s.vtable.closeSync != nil:
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s.vtable.closeSync(s)
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else:
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if s.vtable.closeSync != nil:
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s.vtable.closeSync(s)
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s.vtable = nil
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template disconnectInputDevice(s: AsyncInputStream) =
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disconnectInputDevice InputStream(s)
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when fsAsyncSupport:
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template disconnectInputDevice(s: AsyncInputStream) =
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disconnectInputDevice InputStream(s)
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proc preventFurtherReading(s: InputStream) =
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s.vtable = nil
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s.span = default(PageSpan)
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template preventFurtherReading(s: AsyncInputStream) =
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preventFurtherReading InputStream(s)
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when fsAsyncSupport:
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template preventFurtherReading(s: AsyncInputStream) =
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preventFurtherReading InputStream(s)
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template makeHandle*(sp: InputStream): InputStreamHandle =
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let s = sp
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@ -94,23 +135,25 @@ proc close*(s: InputStream,
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## `waitFor` to block until the async operation completes.
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s.disconnectInputDevice()
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s.preventFurtherReading()
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if s.closeFut != nil:
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fsTranslateErrors "Stream closing failed":
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if behavior == waitAsyncClose:
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waitFor s.closeFut
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else:
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asyncCheck s.closeFut
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when fsAsyncSupport:
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if s.closeFut != nil:
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fsTranslateErrors "Stream closing failed":
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if behavior == waitAsyncClose:
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waitFor s.closeFut
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else:
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asyncCheck s.closeFut
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template close*(sp: AsyncInputStream) =
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## Starts the asychronous closing of the stream and returns a future that
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## tracks the closing operation.
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let s = InputStream sp
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disconnectInputDevice(s)
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preventFurtherReading(s)
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if s.closeFut != nil:
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fsAwait s.closeFut
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when fsAsyncSupport:
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template close*(sp: AsyncInputStream) =
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## Starts the asychronous closing of the stream and returns a future that
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## tracks the closing operation.
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let s = InputStream sp
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disconnectInputDevice(s)
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preventFurtherReading(s)
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if s.closeFut != nil:
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fsAwait s.closeFut
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template closeNoWait*(sp: AsyncInputStream|InputStream) =
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template closeNoWait*(sp: MaybeAsyncInputStream) =
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## Close the stream without waiting even if's async.
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## This operation will use `asyncCheck` internally to detect unhandled
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## errors from the closing operation.
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@ -224,56 +267,52 @@ proc readableNow*(s: InputStream): bool =
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getNewSpan s
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s.span.hasRunway
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template readableNow*(s: AsyncInputStream): bool =
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readableNow InputStream(s)
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when fsAsyncSupport:
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template readableNow*(s: AsyncInputStream): bool =
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readableNow InputStream(s)
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# TODO: The pure async interface should be moved in a separate module
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# to make FastStreams more light-weight when the async back-end
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# is not used (e.g. in Confutils)
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#
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# The problem is that the `async` macro will pull the entire
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# event loop right now.
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proc readOnce*(sp: AsyncInputStream): Future[Natural] {.async.} =
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let s = InputStream(sp)
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fsAssert s.buffers != nil and s.vtable != nil
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proc readOnce*(sp: AsyncInputStream): Future[Natural] {.async.} =
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let s = InputStream(sp)
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fsAssert s.buffers != nil and s.vtable != nil
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result = fsAwait s.vtable.readAsync(s, nil, 0)
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result = fsAwait s.vtable.readAsync(s, nil, 0)
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if s.buffers.eofReached:
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disconnectInputDevice(s)
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if s.buffers.eofReached:
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disconnectInputDevice(s)
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if result > 0 and s.span.len == 0:
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getNewSpan s
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if result > 0 and s.span.len == 0:
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getNewSpan s
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proc timeoutToNextByteImpl(s: AsyncInputStream,
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deadline: Future): Future[bool] {.async.} =
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let readFut = s.readOnce
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fsAwait readFut or deadline
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if not readFut.finished:
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readFut.cancel()
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return true
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else:
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return false
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proc timeoutToNextByteImpl(s: AsyncInputStream,
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deadline: Future): Future[bool] {.async.} =
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let readFut = s.readOnce
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fsAwait readFut or deadline
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if not readFut.finished:
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readFut.cancel()
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return true
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else:
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return false
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template timeoutToNextByte*(sp: AsyncInputStream, deadline: Future): bool =
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let s = sp
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if readableNow(s):
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true
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else:
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fsAwait timeoutToNextByteImpl(s, deadline)
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template timeoutToNextByte*(sp: AsyncInputStream, deadline: Future): bool =
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let s = sp
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if readableNow(s):
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true
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else:
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fsAwait timeoutToNextByteImpl(s, deadline)
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template timeoutToNextByte*(sp: AsyncInputStream, timeout: Duration): bool =
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let s = sp
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if readableNow(s):
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true
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else:
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fsAwait timeoutToNextByteImpl(s, sleepAsync(timeout))
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template timeoutToNextByte*(sp: AsyncInputStream, timeout: Duration): bool =
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let s = sp
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if readableNow(s):
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true
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else:
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fsAwait timeoutToNextByteImpl(s, sleepAsync(timeout))
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proc closeAsync*(s: AsyncInputStream) {.async.} =
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close s
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proc closeAsync*(s: AsyncInputStream) {.async.} =
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close s
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# TODO: End of purely async interface
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template totalUnconsumedBytes*(s: AsyncInputStream): Natural =
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## Alias for InputStream.totalUnconsumedBytes
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totalUnconsumedBytes InputStream(s)
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func getBestContiguousRunway(s: InputStream): Natural =
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result = s.span.len
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@ -298,10 +337,6 @@ func totalUnconsumedBytes*(s: InputStream): Natural =
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localRunway + runwayInBuffers
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template totalUnconsumedBytes*(s: AsyncInputStream): Natural =
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## Alias for InputStream.totalUnconsumedBytes
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totalUnconsumedBytes InputStream(s)
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proc limitReadableRange(s: InputStream, rangeLen: Natural): Natural =
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s.vtable = nil
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@ -317,7 +352,7 @@ proc limitReadableRange(s: InputStream, rangeLen: Natural): Natural =
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s.buffers.queue.peekFirst.consumedTo -= bytesToUnconsume
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return s.buffers.setFauxEof(s.spanEndPos)
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template withReadableRange*(sp: InputStream|AsyncInputStream,
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template withReadableRange*(sp: MaybeAsyncInputStream,
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rangeLen: Natural,
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rangeStreamVarName, blk: untyped) =
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let
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@ -409,8 +444,9 @@ proc len*(s: InputStream): Option[Natural] {.raises: [Defect, IOError].} =
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else:
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none Natural
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template len*(s: AsyncInputStream): Option[Natural] =
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len InputStream(s)
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when fsAsyncSupport:
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template len*(s: AsyncInputStream): Option[Natural] =
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len InputStream(s)
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func memoryInput*(buffers: PageBuffers): InputStreamHandle =
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var spanEndPos = Natural 0
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@ -541,15 +577,16 @@ template readable*(sp: InputStream): bool =
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let s = sp
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hasRunway(s.span) or bufferMoreDataSync(s)
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template readable*(sp: AsyncInputStream): bool =
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## Async version of `readable`.
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## The intended API usage is the same. Instead of blocking, an async
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## stream will use `await` while waiting for more data.
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let s = InputStream sp
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if hasRunway(s.span):
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true
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else:
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bufferMoreDataImpl(s, fsAwait, readAsync)
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when fsAsyncSupport:
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template readable*(sp: AsyncInputStream): bool =
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## Async version of `readable`.
|
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## The intended API usage is the same. Instead of blocking, an async
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## stream will use `await` while waiting for more data.
|
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let s = InputStream sp
|
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if hasRunway(s.span):
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true
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else:
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bufferMoreDataImpl(s, fsAwait, readAsync)
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|
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func continueAfterReadN(s: InputStream,
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runwayBeforeRead, bytesRead: Natural) =
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|
|
@ -615,15 +652,16 @@ proc readable*(s: InputStream, n: int): bool =
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## for futher discussion of this.
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readableNImpl(s, n, noAwait, readSync)
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template readable*(sp: AsyncInputStream, np: int): bool =
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## Async version of `readable(n)`.
|
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## The intended API usage is the same. Instead of blocking, an async
|
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## stream will use `await` while waiting for more data.
|
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let
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s = InputStream sp
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n = np
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when fsAsyncSupport:
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template readable*(sp: AsyncInputStream, np: int): bool =
|
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## Async version of `readable(n)`.
|
||||
## The intended API usage is the same. Instead of blocking, an async
|
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## stream will use `await` while waiting for more data.
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let
|
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s = InputStream sp
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n = np
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|
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readableNImpl(s, n, fsAwait, readAsync)
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readableNImpl(s, n, fsAwait, readAsync)
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|
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template peek*(sp: InputStream): byte =
|
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let s = sp
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|
@ -633,8 +671,9 @@ template peek*(sp: InputStream): byte =
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getNewSpanOrDieTrying s
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s.span.startAddr[]
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|
||||
template peek*(s: AsyncInputStream): byte =
|
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peek InputStream(s)
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when fsAsyncSupport:
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template peek*(s: AsyncInputStream): byte =
|
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peek InputStream(s)
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||||
|
||||
func readFromNewSpan(s: InputStream): byte =
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getNewSpanOrDieTrying s
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||||
|
|
@ -650,8 +689,9 @@ template read*(sp: InputStream): byte =
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|||
else:
|
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readFromNewSpan s
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|
||||
template read*(s: AsyncInputStream): byte =
|
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read InputStream(s)
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when fsAsyncSupport:
|
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template read*(s: AsyncInputStream): byte =
|
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read InputStream(s)
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||||
|
||||
proc peekAt*(s: InputStream, pos: int): byte {.inline.} =
|
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# TODO implement page flipping
|
||||
|
|
@ -659,8 +699,9 @@ proc peekAt*(s: InputStream, pos: int): byte {.inline.} =
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fsAssert cast[uint](peekHead) < cast[uint](s.span.endAddr)
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return peekHead[]
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|
||||
template peekAt*(s: AsyncInputStream, pos: int): byte =
|
||||
peekAt InputStream(s), pos
|
||||
when fsAsyncSupport:
|
||||
template peekAt*(s: AsyncInputStream, pos: int): byte =
|
||||
peekAt InputStream(s), pos
|
||||
|
||||
proc advance*(s: InputStream) =
|
||||
if hasRunway(s.span):
|
||||
|
|
@ -673,11 +714,12 @@ proc advance*(s: InputStream, n: Natural) =
|
|||
for i in 0 ..< n:
|
||||
advance s
|
||||
|
||||
template advance*(s: AsyncInputStream) =
|
||||
advance InputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template advance*(s: AsyncInputStream) =
|
||||
advance InputStream(s)
|
||||
|
||||
template advance*(s: AsyncInputStream, n: Natural) =
|
||||
advance InputStream(s), n
|
||||
template advance*(s: AsyncInputStream, n: Natural) =
|
||||
advance InputStream(s), n
|
||||
|
||||
proc drainBuffersInto*(s: InputStream, dstAddr: ptr byte, dstLen: Natural): Natural =
|
||||
var
|
||||
|
|
@ -789,29 +831,30 @@ proc readInto*(s: InputStream, target: var openarray[byte]): bool =
|
|||
## regarding the number of bytes read, see `readIntoEx`.
|
||||
s.readIntoEx(target) == target.len
|
||||
|
||||
template readIntoEx*(sp: AsyncInputStream, dst: var openarray[byte]): int =
|
||||
let s = InputStream(sp)
|
||||
# BEWARE! `openArrayToPair` here is needed to avoid
|
||||
# double evaluation of the `dst` expression:
|
||||
let (dstAddr, dstLen) = openArrayToPair(dst)
|
||||
readIntoExImpl(s, dstAddr, dstLen, fsAwait, readAsync)
|
||||
when fsAsyncSupport:
|
||||
template readIntoEx*(sp: AsyncInputStream, dst: var openarray[byte]): int =
|
||||
let s = InputStream(sp)
|
||||
# BEWARE! `openArrayToPair` here is needed to avoid
|
||||
# double evaluation of the `dst` expression:
|
||||
let (dstAddr, dstLen) = openArrayToPair(dst)
|
||||
readIntoExImpl(s, dstAddr, dstLen, fsAwait, readAsync)
|
||||
|
||||
template readInto*(sp: AsyncInputStream, dst: var openarray[byte]): bool =
|
||||
## Asynchronously read data into the destination buffer.
|
||||
##
|
||||
## Returns `false` if EOF was reached before the buffer
|
||||
## was fully populated. if you need precise information
|
||||
## regarding the number of bytes read, see `readIntoEx`.
|
||||
##
|
||||
## If there are enough bytes already buffered by the stream,
|
||||
## the expression will complete immediately.
|
||||
## Otherwise, it will await more bytes to become available.
|
||||
template readInto*(sp: AsyncInputStream, dst: var openarray[byte]): bool =
|
||||
## Asynchronously read data into the destination buffer.
|
||||
##
|
||||
## Returns `false` if EOF was reached before the buffer
|
||||
## was fully populated. if you need precise information
|
||||
## regarding the number of bytes read, see `readIntoEx`.
|
||||
##
|
||||
## If there are enough bytes already buffered by the stream,
|
||||
## the expression will complete immediately.
|
||||
## Otherwise, it will await more bytes to become available.
|
||||
|
||||
let s = InputStream(sp)
|
||||
# BEWARE! `openArrayToPair` here is needed to avoid
|
||||
# double evaluation of the `dst` expression:
|
||||
let (dstAddr, dstLen) = openArrayToPair(dst)
|
||||
readIntoExImpl(s, dstAddr, dstLen, fsAwait, readAsync) == dstLen
|
||||
let s = InputStream(sp)
|
||||
# BEWARE! `openArrayToPair` here is needed to avoid
|
||||
# double evaluation of the `dst` expression:
|
||||
let (dstAddr, dstLen) = openArrayToPair(dst)
|
||||
readIntoExImpl(s, dstAddr, dstLen, fsAwait, readAsync) == dstLen
|
||||
|
||||
template useHeapMem(_: Natural) =
|
||||
var buffer: seq[byte]
|
||||
|
|
@ -869,8 +912,9 @@ template read*(sp: InputStream, np: static Natural): openarray[byte] =
|
|||
template read*(s: InputStream, n: Natural): openarray[byte] =
|
||||
readNImpl(s, n, useHeapMem)
|
||||
|
||||
template read*(s: AsyncInputStream, n: Natural): openarray[byte] =
|
||||
read InputStream(s), n
|
||||
when fsAsyncSupport:
|
||||
template read*(s: AsyncInputStream, n: Natural): openarray[byte] =
|
||||
read InputStream(s), n
|
||||
|
||||
proc lookAheadMatch*(s: InputStream, data: openarray[byte]): bool =
|
||||
for i in 0 ..< data.len:
|
||||
|
|
@ -879,23 +923,26 @@ proc lookAheadMatch*(s: InputStream, data: openarray[byte]): bool =
|
|||
|
||||
return true
|
||||
|
||||
template lookAheadMatch*(s: AsyncInputStream, data: openarray[byte]): bool =
|
||||
lookAheadMatch InputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template lookAheadMatch*(s: AsyncInputStream, data: openarray[byte]): bool =
|
||||
lookAheadMatch InputStream(s)
|
||||
|
||||
proc next*(s: InputStream): Option[byte] =
|
||||
if readable(s):
|
||||
result = some read(s)
|
||||
|
||||
template next*(sp: AsyncInputStream): Option[byte] =
|
||||
let s = sp
|
||||
if readable(s):
|
||||
some read(s)
|
||||
else:
|
||||
none byte
|
||||
when fsAsyncSupport:
|
||||
template next*(sp: AsyncInputStream): Option[byte] =
|
||||
let s = sp
|
||||
if readable(s):
|
||||
some read(s)
|
||||
else:
|
||||
none byte
|
||||
|
||||
proc pos*(s: InputStream): int {.inline.} =
|
||||
s.spanEndPos - s.span.len
|
||||
|
||||
template pos*(s: AsyncInputStream): int =
|
||||
pos InputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template pos*(s: AsyncInputStream): int =
|
||||
pos InputStream(s)
|
||||
|
||||
|
|
|
|||
|
|
@ -1,35 +1,40 @@
|
|||
import
|
||||
stew/shims/macros,
|
||||
async_backend, inputs, outputs
|
||||
async_backend
|
||||
|
||||
export
|
||||
async_backend
|
||||
|
||||
macro fsMultiSync*(body: untyped) =
|
||||
# We will produce an identical copy of the annotated proc,
|
||||
# but taking async parameters and having the async pragma.
|
||||
var
|
||||
asyncProcBody = copy body
|
||||
asyncProcParams = asyncProcBody[3]
|
||||
when fsAsyncSupport:
|
||||
import
|
||||
stew/shims/macros,
|
||||
"."/[inputs, outputs]
|
||||
|
||||
asyncProcBody.addPragma(bindSym"async")
|
||||
macro fsMultiSync*(body: untyped) =
|
||||
# We will produce an identical copy of the annotated proc,
|
||||
# but taking async parameters and having the async pragma.
|
||||
var
|
||||
asyncProcBody = copy body
|
||||
asyncProcParams = asyncProcBody[3]
|
||||
|
||||
# The return types becomes Future[T]
|
||||
if asyncProcParams[0].kind == nnkEmpty:
|
||||
asyncProcParams[0] = newTree(nnkBracketExpr, bindSym"Future", ident"void")
|
||||
else:
|
||||
asyncProcParams[0] = newTree(nnkBracketExpr, bindSym"Future", asyncProcParams[0])
|
||||
asyncProcBody.addPragma(bindSym"async")
|
||||
|
||||
# We replace all stream inputs with their async counterparts
|
||||
for i in 1 ..< asyncProcParams.len:
|
||||
let paramsDef = asyncProcParams[i]
|
||||
let typ = paramsDef[^2]
|
||||
if eqIdent(typ, "InputStream"):
|
||||
paramsDef[^2] = bindSym "AsyncInputStream"
|
||||
elif eqIdent(typ, "OutputStream"):
|
||||
paramsDef[^2] = bindSym "AsyncOutputStream"
|
||||
# The return types becomes Future[T]
|
||||
if asyncProcParams[0].kind == nnkEmpty:
|
||||
asyncProcParams[0] = newTree(nnkBracketExpr, bindSym"Future", ident"void")
|
||||
else:
|
||||
asyncProcParams[0] = newTree(nnkBracketExpr, bindSym"Future", asyncProcParams[0])
|
||||
|
||||
result = newStmtList(body, asyncProcBody)
|
||||
when defined(debugSupportAsync):
|
||||
echo result.repr
|
||||
# We replace all stream inputs with their async counterparts
|
||||
for i in 1 ..< asyncProcParams.len:
|
||||
let paramsDef = asyncProcParams[i]
|
||||
let typ = paramsDef[^2]
|
||||
if eqIdent(typ, "InputStream"):
|
||||
paramsDef[^2] = bindSym "AsyncInputStream"
|
||||
elif eqIdent(typ, "OutputStream"):
|
||||
paramsDef[^2] = bindSym "AsyncOutputStream"
|
||||
|
||||
result = newStmtList(body, asyncProcBody)
|
||||
when defined(debugSupportAsync):
|
||||
echo result.repr
|
||||
else:
|
||||
macro fsMultiSync*(body: untyped) = body
|
||||
|
|
|
|||
|
|
@ -14,17 +14,78 @@ import
|
|||
export
|
||||
initPageBuffers, CloseBehavior
|
||||
|
||||
type
|
||||
OutputStream* = ref object of RootObj
|
||||
vtable*: ptr OutputStreamVTable # This is nil for any memory output
|
||||
buffers*: PageBuffers # This is nil for unsafe memory outputs
|
||||
span*: PageSpan
|
||||
spanEndPos*: Natural
|
||||
extCursorsCount: int
|
||||
closeFut: Future[void] # This is nil before `close` is called
|
||||
when debugHelpers:
|
||||
name*: string
|
||||
when fsAsyncSupport:
|
||||
# Circular type refs prevent more targeted `when`
|
||||
type
|
||||
OutputStream* = ref object of RootObj
|
||||
vtable*: ptr OutputStreamVTable # This is nil for any memory output
|
||||
buffers*: PageBuffers # This is nil for unsafe memory outputs
|
||||
span*: PageSpan
|
||||
spanEndPos*: Natural
|
||||
extCursorsCount: int
|
||||
closeFut: Future[void] # This is nil before `close` is called
|
||||
when debugHelpers:
|
||||
name*: string
|
||||
|
||||
AsyncOutputStream* {.borrow: `.`.} = distinct OutputStream
|
||||
|
||||
WriteSyncProc* = proc (s: OutputStream, src: pointer, srcLen: Natural)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
WriteAsyncProc* = proc (s: OutputStream, src: pointer, srcLen: Natural): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
FlushSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
FlushAsyncProc* = proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
CloseSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
CloseAsyncProc* = proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
OutputStreamVTable* = object
|
||||
writeSync*: WriteSyncProc
|
||||
writeAsync*: WriteAsyncProc
|
||||
flushSync*: FlushSyncProc
|
||||
flushAsync*: FlushAsyncProc
|
||||
closeSync*: CloseSyncProc
|
||||
closeAsync*: CloseAsyncProc
|
||||
|
||||
MaybeAsyncOutputStream* = OutputStream | AsyncOutputStream
|
||||
|
||||
else:
|
||||
type
|
||||
OutputStream* = ref object of RootObj
|
||||
vtable*: ptr OutputStreamVTable # This is nil for any memory output
|
||||
buffers*: PageBuffers # This is nil for unsafe memory outputs
|
||||
span*: PageSpan
|
||||
spanEndPos*: Natural
|
||||
extCursorsCount: int
|
||||
when debugHelpers:
|
||||
name*: string
|
||||
|
||||
|
||||
WriteSyncProc* = proc (s: OutputStream, src: pointer, srcLen: Natural)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
FlushSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
CloseSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
OutputStreamVTable* = object
|
||||
writeSync*: WriteSyncProc
|
||||
flushSync*: FlushSyncProc
|
||||
closeSync*: CloseSyncProc
|
||||
|
||||
MaybeAsyncOutputStream* = OutputStream
|
||||
|
||||
type
|
||||
WriteCursor* = object
|
||||
span: PageSpan
|
||||
stream: OutputStream
|
||||
|
|
@ -36,55 +97,35 @@ type
|
|||
OutputStreamHandle* = object
|
||||
s*: OutputStream
|
||||
|
||||
AsyncOutputStream* {.borrow: `.`.} = distinct OutputStream
|
||||
|
||||
WriteSyncProc* = proc (s: OutputStream, src: pointer, srcLen: Natural)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
WriteAsyncProc* = proc (s: OutputStream, src: pointer, srcLen: Natural): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
FlushSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
FlushAsyncProc* = proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
CloseSyncProc* = proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
CloseAsyncProc* = proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].}
|
||||
|
||||
OutputStreamVTable* = object
|
||||
writeSync*: WriteSyncProc
|
||||
writeAsync*: WriteAsyncProc
|
||||
flushSync*: FlushSyncProc
|
||||
flushAsync*: FlushAsyncProc
|
||||
closeSync*: CloseSyncProc
|
||||
closeAsync*: CloseAsyncProc
|
||||
|
||||
VarSizeWriteCursor* = distinct WriteCursor
|
||||
|
||||
FileOutputStream = ref object of OutputStream
|
||||
file: File
|
||||
|
||||
template Sync*(s: OutputStream): OutputStream = s
|
||||
template Async*(s: OutputStream): AsyncOutputStream = AsyncOutputStream(s)
|
||||
|
||||
template Sync*(s: AsyncOutputStream): OutputStream = OutputStream(s)
|
||||
template Async*(s: AsyncOutputStream): AsyncOutputStream = s
|
||||
when fsAsyncSupport:
|
||||
template Async*(s: OutputStream): AsyncOutputStream = AsyncOutputStream(s)
|
||||
|
||||
template Sync*(s: AsyncOutputStream): OutputStream = OutputStream(s)
|
||||
template Async*(s: AsyncOutputStream): AsyncOutputStream = s
|
||||
|
||||
proc disconnectOutputDevice(s: OutputStream) =
|
||||
if s.vtable != nil:
|
||||
if s.vtable.closeAsync != nil:
|
||||
s.closeFut = s.vtable.closeAsync(s)
|
||||
elif s.vtable.closeSync != nil:
|
||||
s.vtable.closeSync(s)
|
||||
when fsAsyncSupport:
|
||||
if s.vtable.closeAsync != nil:
|
||||
s.closeFut = s.vtable.closeAsync(s)
|
||||
elif s.vtable.closeSync != nil:
|
||||
s.vtable.closeSync(s)
|
||||
else:
|
||||
if s.vtable.closeSync != nil:
|
||||
s.vtable.closeSync(s)
|
||||
|
||||
s.vtable = nil
|
||||
|
||||
template disconnectOutputDevice(s: AsyncOutputStream) =
|
||||
disconnectOutputDevice OutputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template disconnectOutputDevice(s: AsyncOutputStream) =
|
||||
disconnectOutputDevice OutputStream(s)
|
||||
|
||||
template flushImpl(s: OutputStream, awaiter, writeOp, flushOp: untyped) =
|
||||
fsAssert s.extCursorsCount == 0
|
||||
|
|
@ -99,36 +140,20 @@ template flushImpl(s: OutputStream, awaiter, writeOp, flushOp: untyped) =
|
|||
proc flush*(s: OutputStream) =
|
||||
flushImpl(s, noAwait, writeSync, flushSync)
|
||||
|
||||
template flush*(sp: AsyncOutputStream) =
|
||||
let s = OutputStream sp
|
||||
flushImpl(s, fsAwait, writeAsync, flushAsync)
|
||||
|
||||
proc flushAsync*(s: AsyncOutputStream) {.async.} =
|
||||
flush s
|
||||
|
||||
proc close*(s: OutputStream,
|
||||
behavior = dontWaitAsyncClose)
|
||||
{.raises: [IOError, Defect].} =
|
||||
flush s
|
||||
disconnectOutputDevice(s)
|
||||
if s.closeFut != nil:
|
||||
fsTranslateErrors "Stream closing failed":
|
||||
if behavior == waitAsyncClose:
|
||||
waitFor s.closeFut
|
||||
else:
|
||||
asyncCheck s.closeFut
|
||||
when fsAsyncSupport:
|
||||
if s.closeFut != nil:
|
||||
fsTranslateErrors "Stream closing failed":
|
||||
if behavior == waitAsyncClose:
|
||||
waitFor s.closeFut
|
||||
else:
|
||||
asyncCheck s.closeFut
|
||||
|
||||
template close*(sp: AsyncOutputStream) =
|
||||
let s = OutputStream sp
|
||||
flush(Async s)
|
||||
disconnectOutputDevice(s)
|
||||
if s.closeFut != nil:
|
||||
fsAwait s.closeFut
|
||||
|
||||
proc closeAsync*(s: AsyncOutputStream) {.async.} =
|
||||
close s
|
||||
|
||||
template closeNoWait*(sp: AsyncOutputStream|OutputStream) =
|
||||
template closeNoWait*(sp: MaybeAsyncOutputStream) =
|
||||
## Close the stream without waiting even if's async.
|
||||
## This operation will use `asyncCheck` internally to detect unhandled
|
||||
## errors from the closing operation.
|
||||
|
|
@ -196,8 +221,9 @@ proc ensureRunway*(s: OutputStream, neededRunway: Natural) =
|
|||
s.buffers.ensureRunway(s.span, neededRunway)
|
||||
s.spanEndPos += (s.span.len - runway)
|
||||
|
||||
template ensureRunway*(s: AsyncOutputStream, neededRunway: Natural) =
|
||||
ensureRunway OutputStream(s), neededRunway
|
||||
when fsAsyncSupport:
|
||||
template ensureRunway*(s: AsyncOutputStream, neededRunway: Natural) =
|
||||
ensureRunway OutputStream(s), neededRunway
|
||||
|
||||
template implementWrites*(buffersParam: PageBuffers,
|
||||
srcParam: pointer,
|
||||
|
|
@ -266,8 +292,9 @@ proc fileOutput*(filename: string,
|
|||
proc pos*(s: OutputStream): int =
|
||||
s.spanEndPos - s.span.len
|
||||
|
||||
template pos*(s: AsyncOutputStream): int =
|
||||
pos OutputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template pos*(s: AsyncOutputStream): int =
|
||||
pos OutputStream(s)
|
||||
|
||||
proc getBuffers*(s: OutputStream): PageBuffers =
|
||||
fsAssert s.buffers != nil
|
||||
|
|
@ -313,10 +340,11 @@ proc drainAllBuffersSync(s: OutputStream, buf: pointer, bufSize: Natural) =
|
|||
s.span = s.buffers.getWritableSpan()
|
||||
s.spanEndPos += s.span.len
|
||||
|
||||
proc drainAllBuffersAsync(s: OutputStream, buf: pointer, bufSize: Natural) {.async.} =
|
||||
fsAwait s.vtable.writeAsync(s, buf, bufSize)
|
||||
s.span = s.buffers.getWritableSpan()
|
||||
s.spanEndPos += s.span.len
|
||||
when fsAsyncSupport:
|
||||
proc drainAllBuffersAsync(s: OutputStream, buf: pointer, bufSize: Natural) {.async.} =
|
||||
fsAwait s.vtable.writeAsync(s, buf, bufSize)
|
||||
s.span = s.buffers.getWritableSpan()
|
||||
s.spanEndPos += s.span.len
|
||||
|
||||
proc createCursor(s: OutputStream, size: int): WriteCursor =
|
||||
inc s.extCursorsCount
|
||||
|
|
@ -533,21 +561,22 @@ template write*(sp: OutputStream, b: byte) =
|
|||
else:
|
||||
writeToNewSpan(s, b)
|
||||
|
||||
proc write*(sp: AsyncOutputStream, b: byte) =
|
||||
let s = OutputStream sp
|
||||
if atEnd(s.span):
|
||||
addPage(s)
|
||||
writeByte(s.span, b)
|
||||
|
||||
template writeAndWait*(sp: AsyncOutputStream, b: byte) =
|
||||
let s = OutputStream sp
|
||||
if hasRunway(s.span):
|
||||
when fsAsyncSupport:
|
||||
proc write*(sp: AsyncOutputStream, b: byte) =
|
||||
let s = OutputStream sp
|
||||
if atEnd(s.span):
|
||||
addPage(s)
|
||||
writeByte(s.span, b)
|
||||
else:
|
||||
writeToNewSpanImpl(s, b, fsAwait, writeAsync, drainAllBuffersAsync)
|
||||
|
||||
template write*(s: AsyncOutputStream, x: char) =
|
||||
write s, byte(x)
|
||||
template writeAndWait*(sp: AsyncOutputStream, b: byte) =
|
||||
let s = OutputStream sp
|
||||
if hasRunway(s.span):
|
||||
writeByte(s.span, b)
|
||||
else:
|
||||
writeToNewSpanImpl(s, b, fsAwait, writeAsync, drainAllBuffersAsync)
|
||||
|
||||
template write*(s: AsyncOutputStream, x: char) =
|
||||
write s, byte(x)
|
||||
|
||||
template write*(s: OutputStream|var WriteCursor, x: char) =
|
||||
bind write
|
||||
|
|
@ -606,7 +635,7 @@ proc write*(s: OutputStream, bytes: openArray[byte]) =
|
|||
proc write*(s: OutputStream, chars: openArray[char]) =
|
||||
write s, charsToBytes(chars)
|
||||
|
||||
proc write*(s: OutputStream|AsyncOutputStream, value: string) {.inline.} =
|
||||
proc write*(s: MaybeAsyncOutputStream, value: string) {.inline.} =
|
||||
write s, value.toOpenArrayByte(0, value.len - 1)
|
||||
|
||||
template memCopyToBytes(value: auto): untyped =
|
||||
|
|
@ -618,37 +647,39 @@ template memCopyToBytes(value: auto): untyped =
|
|||
proc writeMemCopy*(s: OutputStream, value: auto) =
|
||||
write s, memCopyToBytes(value)
|
||||
|
||||
proc writeBytesAsyncImpl(sp: OutputStream,
|
||||
bytes: openarray[byte]): Future[void] =
|
||||
let s = sp
|
||||
writeBytesImpl(s, bytes):
|
||||
return s.vtable.writeAsync(s, unsafeAddr bytes[0], bytes.len)
|
||||
when fsAsyncSupport:
|
||||
proc writeBytesAsyncImpl(sp: OutputStream,
|
||||
bytes: openarray[byte]): Future[void] =
|
||||
let s = sp
|
||||
writeBytesImpl(s, bytes):
|
||||
return s.vtable.writeAsync(s, unsafeAddr bytes[0], bytes.len)
|
||||
|
||||
proc writeBytesAsyncImpl(s: OutputStream,
|
||||
chars: openarray[char]): Future[void] =
|
||||
writeBytesAsyncImpl s, charsToBytes(chars)
|
||||
proc writeBytesAsyncImpl(s: OutputStream,
|
||||
chars: openarray[char]): Future[void] =
|
||||
writeBytesAsyncImpl s, charsToBytes(chars)
|
||||
|
||||
proc writeBytesAsyncImpl(s: OutputStream,
|
||||
str: string): Future[void] =
|
||||
writeBytesAsyncImpl s, toOpenArray(str, 0, str.len - 1)
|
||||
proc writeBytesAsyncImpl(s: OutputStream,
|
||||
str: string): Future[void] =
|
||||
writeBytesAsyncImpl s, toOpenArray(str, 0, str.len - 1)
|
||||
|
||||
template writeAndWait*(s: OutputStream, value: untyped) =
|
||||
write s, value
|
||||
|
||||
template writeAndWait*(sp: AsyncOutputStream, value: untyped) =
|
||||
bind writeBytesAsyncImpl
|
||||
when fsAsyncSupport:
|
||||
template writeAndWait*(sp: AsyncOutputStream, value: untyped) =
|
||||
bind writeBytesAsyncImpl
|
||||
|
||||
let
|
||||
s = OutputStream sp
|
||||
f = writeBytesAsyncImpl(s, value)
|
||||
let
|
||||
s = OutputStream sp
|
||||
f = writeBytesAsyncImpl(s, value)
|
||||
|
||||
if f != nil:
|
||||
fsAwait(f)
|
||||
s.span = getWritableSpan s.buffers
|
||||
s.spanEndPos += s.span.len
|
||||
if f != nil:
|
||||
fsAwait(f)
|
||||
s.span = getWritableSpan s.buffers
|
||||
s.spanEndPos += s.span.len
|
||||
|
||||
template writeMemCopyAndWait*(sp: AsyncOutputStream, value: auto) =
|
||||
writeAndWait(sp, memCopyToBytes(value))
|
||||
template writeMemCopyAndWait*(sp: AsyncOutputStream, value: auto) =
|
||||
writeAndWait(sp, memCopyToBytes(value))
|
||||
|
||||
proc writeBytesToCursor(c: var WriteCursor, bytes: openarray[byte]) =
|
||||
var
|
||||
|
|
@ -795,9 +826,28 @@ template getOutput*(s: OutputStream, T: type seq[byte]): seq[byte] =
|
|||
template getOutput*(s: OutputStream): seq[byte] =
|
||||
cast[seq[byte]](s.getOutput(string))
|
||||
|
||||
template getOutput*(s: AsyncOutputStream): seq[byte] =
|
||||
getOutput OutputStream(s)
|
||||
when fsAsyncSupport:
|
||||
template getOutput*(s: AsyncOutputStream): seq[byte] =
|
||||
getOutput OutputStream(s)
|
||||
|
||||
template getOutput*(s: AsyncOutputStream, T: type): untyped =
|
||||
getOutput OutputStream(s), T
|
||||
template getOutput*(s: AsyncOutputStream, T: type): untyped =
|
||||
getOutput OutputStream(s), T
|
||||
|
||||
when fsAsyncSupport:
|
||||
template flush*(sp: AsyncOutputStream) =
|
||||
let s = OutputStream sp
|
||||
flushImpl(s, fsAwait, writeAsync, flushAsync)
|
||||
|
||||
proc flushAsync*(s: AsyncOutputStream) {.async.} =
|
||||
flush s
|
||||
|
||||
template close*(sp: AsyncOutputStream) =
|
||||
let s = OutputStream sp
|
||||
flush(Async s)
|
||||
disconnectOutputDevice(s)
|
||||
if s.closeFut != nil:
|
||||
fsAwait s.closeFut
|
||||
|
||||
proc closeAsync*(s: AsyncOutputStream) {.async.} =
|
||||
close s
|
||||
|
||||
|
|
|
|||
|
|
@ -1,337 +1,341 @@
|
|||
import
|
||||
macros,
|
||||
inputs, outputs, buffers, async_backend
|
||||
"."/[inputs, outputs, async_backend]
|
||||
|
||||
export
|
||||
inputs, outputs, async_backend
|
||||
|
||||
type
|
||||
Pipe* = ref object
|
||||
# TODO: Make these stream handles
|
||||
input*: AsyncInputStream
|
||||
output*: AsyncOutputStream
|
||||
buffers*: PageBuffers
|
||||
when fsAsyncSupport:
|
||||
import
|
||||
std/macros,
|
||||
./buffers
|
||||
|
||||
template enterWait(fut: var Future, context: static string) =
|
||||
let wait = newFuture[void](context)
|
||||
fut = wait
|
||||
try: fsAwait wait
|
||||
finally: fut = nil
|
||||
type
|
||||
Pipe* = ref object
|
||||
# TODO: Make these stream handles
|
||||
input*: AsyncInputStream
|
||||
output*: AsyncOutputStream
|
||||
buffers*: PageBuffers
|
||||
|
||||
template awake(fp: Future) =
|
||||
let f = fp
|
||||
if f != nil and not finished(f):
|
||||
complete f
|
||||
template enterWait(fut: var Future, context: static string) =
|
||||
let wait = newFuture[void](context)
|
||||
fut = wait
|
||||
try: fsAwait wait
|
||||
finally: fut = nil
|
||||
|
||||
proc pipeRead(s: LayeredInputStream,
|
||||
dst: pointer, dstLen: Natural): Future[Natural] {.async.} =
|
||||
let buffers = s.buffers
|
||||
if buffers.eofReached: return 0
|
||||
template awake(fp: Future) =
|
||||
let f = fp
|
||||
if f != nil and not finished(f):
|
||||
complete f
|
||||
|
||||
var
|
||||
bytesInBuffersAtStart = buffers.totalBufferedBytes
|
||||
minBytesExpected = max(1, dstLen)
|
||||
bytesInBuffersNow = bytesInBuffersAtStart
|
||||
proc pipeRead(s: LayeredInputStream,
|
||||
dst: pointer, dstLen: Natural): Future[Natural] {.async.} =
|
||||
let buffers = s.buffers
|
||||
if buffers.eofReached: return 0
|
||||
|
||||
var
|
||||
bytesInBuffersAtStart = buffers.totalBufferedBytes
|
||||
minBytesExpected = max(1, dstLen)
|
||||
bytesInBuffersNow = bytesInBuffersAtStart
|
||||
|
||||
while bytesInBuffersNow < minBytesExpected:
|
||||
awake buffers.waitingWriter
|
||||
buffers.waitingReader.enterWait "waiting for writer to buffer more data"
|
||||
|
||||
bytesInBuffersNow = buffers.totalBufferedBytes
|
||||
if buffers.eofReached:
|
||||
return bytesInBuffersNow - bytesInBuffersAtStart
|
||||
|
||||
if dst != nil:
|
||||
let drained {.used.} = drainBuffersInto(s, cast[ptr byte](dst), dstLen)
|
||||
fsAssert drained == dstLen
|
||||
|
||||
while bytesInBuffersNow < minBytesExpected:
|
||||
awake buffers.waitingWriter
|
||||
buffers.waitingReader.enterWait "waiting for writer to buffer more data"
|
||||
|
||||
bytesInBuffersNow = buffers.totalBufferedBytes
|
||||
if buffers.eofReached:
|
||||
return bytesInBuffersNow - bytesInBuffersAtStart
|
||||
return bytesInBuffersNow - bytesInBuffersAtStart
|
||||
|
||||
if dst != nil:
|
||||
let drained {.used.} = drainBuffersInto(s, cast[ptr byte](dst), dstLen)
|
||||
fsAssert drained == dstLen
|
||||
proc pipeWrite(s: LayeredOutputStream, src: pointer, srcLen: Natural) {.async.} =
|
||||
let buffers = s.buffers
|
||||
while buffers.canAcceptWrite(srcLen) == false:
|
||||
buffers.waitingWriter.enterWait "waiting for reader to drain the buffers"
|
||||
|
||||
awake buffers.waitingWriter
|
||||
if src != nil:
|
||||
buffers.appendUnbufferedWrite(src, srcLen)
|
||||
|
||||
return bytesInBuffersNow - bytesInBuffersAtStart
|
||||
awake buffers.waitingReader
|
||||
describeBuffers "pipeWrite", buffers
|
||||
|
||||
proc pipeWrite(s: LayeredOutputStream, src: pointer, srcLen: Natural) {.async.} =
|
||||
let buffers = s.buffers
|
||||
while buffers.canAcceptWrite(srcLen) == false:
|
||||
buffers.waitingWriter.enterWait "waiting for reader to drain the buffers"
|
||||
template completedFuture(name: static string): untyped =
|
||||
let fut = newFuture[void](name)
|
||||
complete fut
|
||||
fut
|
||||
|
||||
if src != nil:
|
||||
buffers.appendUnbufferedWrite(src, srcLen)
|
||||
|
||||
awake buffers.waitingReader
|
||||
describeBuffers "pipeWrite", buffers
|
||||
|
||||
template completedFuture(name: static string): untyped =
|
||||
let fut = newFuture[void](name)
|
||||
complete fut
|
||||
fut
|
||||
|
||||
let pipeInputVTable = InputStreamVTable(
|
||||
readSync: proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Failed to read from pipe":
|
||||
let ls = LayeredInputStream(s)
|
||||
fsAssert ls.allowWaitFor
|
||||
return waitFor pipeRead(ls, dst, dstLen)
|
||||
,
|
||||
readAsync: proc (s: InputStream, dst: pointer, dstLen: Natural): Future[Natural]
|
||||
let pipeInputVTable = InputStreamVTable(
|
||||
readSync: proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let ls = LayeredInputStream(s)
|
||||
return pipeRead(ls, dst, dstLen)
|
||||
,
|
||||
getLenSync: proc (s: InputStream): Option[Natural]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let source = LayeredInputStream(s).source
|
||||
if source != nil:
|
||||
return source.len
|
||||
,
|
||||
closeSync: proc (s: InputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let source = LayeredInputStream(s).source
|
||||
if source != nil:
|
||||
close source
|
||||
,
|
||||
closeAsync: proc (s: InputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
fsTranslateErrors "Failed to read from pipe":
|
||||
let ls = LayeredInputStream(s)
|
||||
fsAssert ls.allowWaitFor
|
||||
return waitFor pipeRead(ls, dst, dstLen)
|
||||
,
|
||||
readAsync: proc (s: InputStream, dst: pointer, dstLen: Natural): Future[Natural]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let ls = LayeredInputStream(s)
|
||||
return pipeRead(ls, dst, dstLen)
|
||||
,
|
||||
getLenSync: proc (s: InputStream): Option[Natural]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let source = LayeredInputStream(s).source
|
||||
if source != nil:
|
||||
return closeAsync(Async source)
|
||||
else:
|
||||
return completedFuture("pipeInput.closeAsync")
|
||||
)
|
||||
return source.len
|
||||
,
|
||||
closeSync: proc (s: InputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let source = LayeredInputStream(s).source
|
||||
if source != nil:
|
||||
close source
|
||||
,
|
||||
closeAsync: proc (s: InputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let source = LayeredInputStream(s).source
|
||||
if source != nil:
|
||||
return closeAsync(Async source)
|
||||
else:
|
||||
return completedFuture("pipeInput.closeAsync")
|
||||
)
|
||||
|
||||
let pipeOutputVTable = OutputStreamVTable(
|
||||
writeSync: proc (s: OutputStream, src: pointer, srcLen: Natural)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Failed to write all bytes to pipe":
|
||||
var ls = LayeredOutputStream(s)
|
||||
fsAssert ls.allowWaitFor
|
||||
waitFor pipeWrite(ls, src, srcLen)
|
||||
,
|
||||
writeAsync: proc (s: OutputStream, src: pointer, srcLen: Natural): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
# TODO: The async macro is raising exceptions even when
|
||||
# merely forwarding a future:
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
return pipeWrite(LayeredOutputStream s, src, srcLen)
|
||||
,
|
||||
flushSync: proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
flush destination
|
||||
,
|
||||
flushAsync: proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let pipeOutputVTable = OutputStreamVTable(
|
||||
writeSync: proc (s: OutputStream, src: pointer, srcLen: Natural)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Failed to write all bytes to pipe":
|
||||
var ls = LayeredOutputStream(s)
|
||||
fsAssert ls.allowWaitFor
|
||||
waitFor pipeWrite(ls, src, srcLen)
|
||||
,
|
||||
writeAsync: proc (s: OutputStream, src: pointer, srcLen: Natural): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
# TODO: The async macro is raising exceptions even when
|
||||
# merely forwarding a future:
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
return pipeWrite(LayeredOutputStream s, src, srcLen)
|
||||
,
|
||||
flushSync: proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
return flushAsync(Async destination)
|
||||
else:
|
||||
return completedFuture("pipeOutput.flushAsync")
|
||||
,
|
||||
closeSync: proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
flush destination
|
||||
,
|
||||
flushAsync: proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
return flushAsync(Async destination)
|
||||
else:
|
||||
return completedFuture("pipeOutput.flushAsync")
|
||||
,
|
||||
closeSync: proc (s: OutputStream)
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
|
||||
s.buffers.eofReached = true
|
||||
s.buffers.eofReached = true
|
||||
|
||||
fsTranslateErrors "Unexpected error from Future.complete":
|
||||
awake s.buffers.waitingReader
|
||||
fsTranslateErrors "Unexpected error from Future.complete":
|
||||
awake s.buffers.waitingReader
|
||||
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
close destination
|
||||
,
|
||||
closeAsync: proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
s.buffers.eofReached = true
|
||||
|
||||
fsTranslateErrors "Unexpected error from Future.complete":
|
||||
awake s.buffers.waitingReader
|
||||
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
return closeAsync(Async destination)
|
||||
else:
|
||||
return completedFuture("pipeOutput.closeAsync")
|
||||
)
|
||||
close destination
|
||||
,
|
||||
closeAsync: proc (s: OutputStream): Future[void]
|
||||
{.nimcall, gcsafe, raises: [IOError, Defect].} =
|
||||
s.buffers.eofReached = true
|
||||
|
||||
func pipeInput*(source: InputStream,
|
||||
pageSize = defaultPageSize,
|
||||
allowWaitFor = false): AsyncInputStream =
|
||||
fsAssert pageSize > 0
|
||||
fsTranslateErrors "Unexpected error from Future.complete":
|
||||
awake s.buffers.waitingReader
|
||||
|
||||
AsyncInputStream LayeredInputStream(
|
||||
vtable: vtableAddr pipeInputVTable,
|
||||
buffers: initPageBuffers pageSize,
|
||||
allowWaitFor: allowWaitFor,
|
||||
source: source)
|
||||
fsTranslateErrors "Unexpected error from the async macro":
|
||||
let destination = LayeredOutputStream(s).destination
|
||||
if destination != nil:
|
||||
return closeAsync(Async destination)
|
||||
else:
|
||||
return completedFuture("pipeOutput.closeAsync")
|
||||
)
|
||||
|
||||
func pipeInput*(buffers: PageBuffers,
|
||||
allowWaitFor = false,
|
||||
source: InputStream = nil): AsyncInputStream =
|
||||
var spanEndPos = Natural 0
|
||||
var span = if buffers.len == 0: default(PageSpan)
|
||||
else: buffers.obtainReadableSpan(spanEndPos)
|
||||
func pipeInput*(source: InputStream,
|
||||
pageSize = defaultPageSize,
|
||||
allowWaitFor = false): AsyncInputStream =
|
||||
fsAssert pageSize > 0
|
||||
|
||||
AsyncInputStream LayeredInputStream(
|
||||
vtable: vtableAddr pipeInputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
source: source)
|
||||
AsyncInputStream LayeredInputStream(
|
||||
vtable: vtableAddr pipeInputVTable,
|
||||
buffers: initPageBuffers pageSize,
|
||||
allowWaitFor: allowWaitFor,
|
||||
source: source)
|
||||
|
||||
proc pipeOutput*(destination: OutputStream,
|
||||
pageSize = defaultPageSize,
|
||||
maxBufferedBytes = defaultPageSize * 4,
|
||||
allowWaitFor = false): AsyncOutputStream =
|
||||
fsAssert pageSize > 0
|
||||
func pipeInput*(buffers: PageBuffers,
|
||||
allowWaitFor = false,
|
||||
source: InputStream = nil): AsyncInputStream =
|
||||
var spanEndPos = Natural 0
|
||||
var span = if buffers.len == 0: default(PageSpan)
|
||||
else: buffers.obtainReadableSpan(spanEndPos)
|
||||
|
||||
var
|
||||
buffers = initPageBuffers pageSize
|
||||
span = buffers.getWritableSpan()
|
||||
AsyncInputStream LayeredInputStream(
|
||||
vtable: vtableAddr pipeInputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
source: source)
|
||||
|
||||
AsyncOutputStream LayeredOutputStream(
|
||||
vtable: vtableAddr pipeOutputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
destination: destination)
|
||||
proc pipeOutput*(destination: OutputStream,
|
||||
pageSize = defaultPageSize,
|
||||
maxBufferedBytes = defaultPageSize * 4,
|
||||
allowWaitFor = false): AsyncOutputStream =
|
||||
fsAssert pageSize > 0
|
||||
|
||||
proc pipeOutput*(buffers: PageBuffers,
|
||||
allowWaitFor = false,
|
||||
destination: OutputStream = nil): AsyncOutputStream =
|
||||
var span = buffers.getWritableSpan()
|
||||
|
||||
AsyncOutputStream LayeredOutputStream(
|
||||
vtable: vtableAddr pipeOutputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
# TODO What if the buffers are partially populated?
|
||||
# Should we adjust the spanEndPos? This would
|
||||
# need the old buffers.totalBytesWritten var.
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
destination: destination)
|
||||
|
||||
func asyncPipe*(pageSize = defaultPageSize,
|
||||
maxBufferedBytes = defaultPageSize * 4): Pipe =
|
||||
fsAssert pageSize > 0
|
||||
Pipe(buffers: initPageBuffers(pageSize, maxBufferedBytes))
|
||||
|
||||
func initReader*(pipe: Pipe): AsyncInputStream =
|
||||
result = pipeInput(pipe.buffers)
|
||||
pipe.input = result
|
||||
|
||||
func initWriter*(pipe: Pipe): AsyncOutputStream =
|
||||
result = pipeOutput(pipe.buffers)
|
||||
pipe.output = result
|
||||
|
||||
proc exchangeBuffersAfterPipilineStep(input: InputStream, output: OutputStream) =
|
||||
let formerInputBuffers = input.buffers
|
||||
let formerOutputBuffers = output.getBuffers
|
||||
|
||||
input.resetBuffers formerOutputBuffers
|
||||
output.recycleBuffers formerInputBuffers
|
||||
|
||||
macro executePipeline*(start: InputStream, steps: varargs[untyped]): untyped =
|
||||
result = newTree(nnkStmtListExpr)
|
||||
|
||||
var
|
||||
inputVal = start
|
||||
outputVal = newCall(bindSym"memoryOutput")
|
||||
|
||||
inputVar = genSym(nskVar, "input")
|
||||
outputVar = genSym(nskVar, "output")
|
||||
|
||||
step0 = steps[0]
|
||||
|
||||
result.add quote do:
|
||||
var
|
||||
`inputVar` = `inputVal`
|
||||
`outputVar` = OutputStream `outputVal`
|
||||
buffers = initPageBuffers pageSize
|
||||
span = buffers.getWritableSpan()
|
||||
|
||||
`step0`(`inputVar`, `outputVar`)
|
||||
AsyncOutputStream LayeredOutputStream(
|
||||
vtable: vtableAddr pipeOutputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
destination: destination)
|
||||
|
||||
proc pipeOutput*(buffers: PageBuffers,
|
||||
allowWaitFor = false,
|
||||
destination: OutputStream = nil): AsyncOutputStream =
|
||||
var span = buffers.getWritableSpan()
|
||||
|
||||
AsyncOutputStream LayeredOutputStream(
|
||||
vtable: vtableAddr pipeOutputVTable,
|
||||
buffers: buffers,
|
||||
span: span,
|
||||
# TODO What if the buffers are partially populated?
|
||||
# Should we adjust the spanEndPos? This would
|
||||
# need the old buffers.totalBytesWritten var.
|
||||
spanEndPos: span.len,
|
||||
allowWaitFor: allowWaitFor,
|
||||
destination: destination)
|
||||
|
||||
func asyncPipe*(pageSize = defaultPageSize,
|
||||
maxBufferedBytes = defaultPageSize * 4): Pipe =
|
||||
fsAssert pageSize > 0
|
||||
Pipe(buffers: initPageBuffers(pageSize, maxBufferedBytes))
|
||||
|
||||
func initReader*(pipe: Pipe): AsyncInputStream =
|
||||
result = pipeInput(pipe.buffers)
|
||||
pipe.input = result
|
||||
|
||||
func initWriter*(pipe: Pipe): AsyncOutputStream =
|
||||
result = pipeOutput(pipe.buffers)
|
||||
pipe.output = result
|
||||
|
||||
proc exchangeBuffersAfterPipilineStep(input: InputStream, output: OutputStream) =
|
||||
let formerInputBuffers = input.buffers
|
||||
let formerOutputBuffers = output.getBuffers
|
||||
|
||||
input.resetBuffers formerOutputBuffers
|
||||
output.recycleBuffers formerInputBuffers
|
||||
|
||||
macro executePipeline*(start: InputStream, steps: varargs[untyped]): untyped =
|
||||
result = newTree(nnkStmtListExpr)
|
||||
|
||||
var
|
||||
inputVal = start
|
||||
outputVal = newCall(bindSym"memoryOutput")
|
||||
|
||||
inputVar = genSym(nskVar, "input")
|
||||
outputVar = genSym(nskVar, "output")
|
||||
|
||||
step0 = steps[0]
|
||||
|
||||
if steps.len > 2:
|
||||
let step1 = steps[1]
|
||||
result.add quote do:
|
||||
let formerInputBuffers = `inputVar`.buffers
|
||||
`inputVar` = memoryInput(getBuffers `outputVar`)
|
||||
recycleBuffers(`outputVar`, formerInputBuffers)
|
||||
`step1`(`inputVar`, `outputVar`)
|
||||
var
|
||||
`inputVar` = `inputVal`
|
||||
`outputVar` = OutputStream `outputVal`
|
||||
|
||||
for i in 2 .. steps.len - 2:
|
||||
let step = steps[i]
|
||||
result.add quote do:
|
||||
exchangeBuffersAfterPipilineStep(`inputVar`, `outputVar`)
|
||||
`step`(`inputVar`, `outputVar`)
|
||||
`step0`(`inputVar`, `outputVar`)
|
||||
|
||||
var closingCall = steps[^1]
|
||||
closingCall.insert(1, outputVar)
|
||||
result.add closingCall
|
||||
if steps.len > 2:
|
||||
let step1 = steps[1]
|
||||
result.add quote do:
|
||||
let formerInputBuffers = `inputVar`.buffers
|
||||
`inputVar` = memoryInput(getBuffers `outputVar`)
|
||||
recycleBuffers(`outputVar`, formerInputBuffers)
|
||||
`step1`(`inputVar`, `outputVar`)
|
||||
|
||||
if defined(debugMacros) or defined(debugPipelines):
|
||||
echo result.repr
|
||||
for i in 2 .. steps.len - 2:
|
||||
let step = steps[i]
|
||||
result.add quote do:
|
||||
exchangeBuffersAfterPipilineStep(`inputVar`, `outputVar`)
|
||||
`step`(`inputVar`, `outputVar`)
|
||||
|
||||
macro executePipeline*(start: AsyncInputStream, steps: varargs[untyped]): untyped =
|
||||
var
|
||||
stream = ident "stream"
|
||||
pipelineSteps = ident "pipelineSteps"
|
||||
pipelineBody = newTree(nnkStmtList)
|
||||
var closingCall = steps[^1]
|
||||
closingCall.insert(1, outputVar)
|
||||
result.add closingCall
|
||||
|
||||
step0 = steps[0]
|
||||
stepOutput = genSym(nskVar, "pipe")
|
||||
if defined(debugMacros) or defined(debugPipelines):
|
||||
echo result.repr
|
||||
|
||||
pipelineBody.add quote do:
|
||||
var `pipelineSteps` = newSeq[Future[void]]()
|
||||
var `stepOutput` = asyncPipe()
|
||||
add `pipelineSteps`, `step0`(`stream`, initWriter(`stepOutput`))
|
||||
macro executePipeline*(start: AsyncInputStream, steps: varargs[untyped]): untyped =
|
||||
var
|
||||
stream = ident "stream"
|
||||
pipelineSteps = ident "pipelineSteps"
|
||||
pipelineBody = newTree(nnkStmtList)
|
||||
|
||||
var
|
||||
stepInput = stepOutput
|
||||
|
||||
for i in 1 .. steps.len - 2:
|
||||
var step = steps[i]
|
||||
stepOutput = genSym(nskVar, "pipe")
|
||||
step0 = steps[0]
|
||||
stepOutput = genSym(nskVar, "pipe")
|
||||
|
||||
pipelineBody.add quote do:
|
||||
var `pipelineSteps` = newSeq[Future[void]]()
|
||||
var `stepOutput` = asyncPipe()
|
||||
add `pipelineSteps`, `step`(initReader(`stepInput`), initWriter(`stepOutput`))
|
||||
add `pipelineSteps`, `step0`(`stream`, initWriter(`stepOutput`))
|
||||
|
||||
stepInput = stepOutput
|
||||
var
|
||||
stepInput = stepOutput
|
||||
|
||||
var RetTypeExpr = copy steps[^1]
|
||||
RetTypeExpr.insert(1, newCall("default", ident"AsyncInputStream"))
|
||||
for i in 1 .. steps.len - 2:
|
||||
var step = steps[i]
|
||||
stepOutput = genSym(nskVar, "pipe")
|
||||
|
||||
var closingCall = steps[^1]
|
||||
closingCall.insert(1, newCall(bindSym"initReader", stepInput))
|
||||
pipelineBody.add quote do:
|
||||
var `stepOutput` = asyncPipe()
|
||||
add `pipelineSteps`, `step`(initReader(`stepInput`), initWriter(`stepOutput`))
|
||||
|
||||
pipelineBody.add quote do:
|
||||
fsAwait allFutures(`pipelineSteps`)
|
||||
`closingCall`
|
||||
stepInput = stepOutput
|
||||
|
||||
result = quote do:
|
||||
type UserOpRetType = type(`RetTypeExpr`)
|
||||
var RetTypeExpr = copy steps[^1]
|
||||
RetTypeExpr.insert(1, newCall("default", ident"AsyncInputStream"))
|
||||
|
||||
when UserOpRetType is Future:
|
||||
type RetType = type(default(UserOpRetType).read)
|
||||
else:
|
||||
type RetType = UserOpRetType
|
||||
var closingCall = steps[^1]
|
||||
closingCall.insert(1, newCall(bindSym"initReader", stepInput))
|
||||
|
||||
pipelineBody.add quote do:
|
||||
fsAwait allFutures(`pipelineSteps`)
|
||||
`closingCall`
|
||||
|
||||
result = quote do:
|
||||
type UserOpRetType = type(`RetTypeExpr`)
|
||||
|
||||
proc pipelineProc(`stream`: AsyncInputStream): Future[RetType] {.async.} =
|
||||
when UserOpRetType is Future:
|
||||
var f = `pipelineBody`
|
||||
return fsAwait(f)
|
||||
type RetType = type(default(UserOpRetType).read)
|
||||
else:
|
||||
return `pipelineBody`
|
||||
type RetType = UserOpRetType
|
||||
|
||||
pipelineProc(`start`)
|
||||
proc pipelineProc(`stream`: AsyncInputStream): Future[RetType] {.async.} =
|
||||
when UserOpRetType is Future:
|
||||
var f = `pipelineBody`
|
||||
return fsAwait(f)
|
||||
else:
|
||||
return `pipelineBody`
|
||||
|
||||
when defined(debugMacros):
|
||||
echo result.repr
|
||||
pipelineProc(`start`)
|
||||
|
||||
when defined(debugMacros):
|
||||
echo result.repr
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue