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Add asynctools adapter

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This commit is contained in:
Zahary Karadjov 2020-06-08 22:37:22 +03:00
commit 5df69fc696
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GPG key ID: C8936F8A3073D609
7 changed files with 137 additions and 31 deletions
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35
faststreams/chronos_adapters.nim
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@ -26,17 +26,15 @@ proc chronosCloseWait(t: StreamTransport)
await t.closeWait()
proc chronosReadOnce(s: ChronosInputStream,
dst: pointer, dstLen: Natural): Future[Natural]
{.async, raises: [IOError, Defect].} =
dst: pointer, dstLen: Natural): Future[Natural] {.async.} =
fsTranslateErrors readingErrMsg:
return implementSingleRead(s.buffers, dst, dstLen, {},
return implementSingleRead(s.buffers, dst, dstLen, ReadFlags {},
readStartAddr, readLen):
await s.transport.readOnce(readStartAddr, readLen)
proc chronosWrites(s: ChronosOutputStream, src: pointer, srcLen: Natural)
{.async, raises: [IOError, Defect].} =
proc chronosWrites(s: ChronosOutputStream, src: pointer, srcLen: Natural) {.async.} =
fsTranslateErrors writeIncompleteErrMsg:
implementWrites(s.buffers, src, srcLen, "StreamTransport"
implementWrites(s.buffers, src, srcLen, "StreamTransport",
writeStartAddr, writeLen):
await s.transport.write(writeStartAddr, writeLen)
@ -44,13 +42,15 @@ proc chronosWrites(s: ChronosOutputStream, src: pointer, srcLen: Natural)
let chronosInputVTable = InputStreamVTable(
readSync: proc (s: InputStream, dst: pointer, dstLen: Natural): Natural
{.nimcall, gcsafe, raises: [IOError, Defect].} =
var cs = ChronosInputStream(s)
fsAssert cs.allowWaitFor
waitFor chronosReadOnce(cs, dst, dstLen)
fsTranslateErrors "Unexpected exception from Chronos async macro":
var cs = ChronosInputStream(s)
fsAssert cs.allowWaitFor
return waitFor chronosReadOnce(cs, dst, dstLen)
,
readAsync: proc (s: InputStream, dst: pointer, dstLen: Natural): Future[Natural]
{.nimcall, gcsafe, raises: [IOError, Defect].} =
chronosReadOnce(ChronosInputStream s, dst, dstLen)
fsTranslateErrors "Unexpected exception from merely forwarding a future":
return chronosReadOnce(ChronosInputStream s, dst, dstLen)
,
closeSync: proc (s: InputStream)
{.nimcall, gcsafe, raises: [IOError, Defect].} =
@ -64,10 +64,11 @@ let chronosInputVTable = InputStreamVTable(
func chronosInput*(s: StreamTransport,
pageSize = defaultPageSize,
allowWaitFor = false): InputStreamHandle =
makeHandle ChronosInputStream(
allowWaitFor = false): AsyncInputStream =
AsyncInputStream ChronosInputStream(
vtable: vtableAddr chronosInputVTable,
buffers: initPageBuffers(pageSize),
transport: s,
allowWaitFor: allowWaitFor)
let chronosOutputVTable = OutputStreamVTable(
@ -88,15 +89,15 @@ let chronosOutputVTable = OutputStreamVTable(
,
closeAsync: proc (s: OutputStream): Future[void]
{.nimcall, gcsafe, raises: [IOError, Defect].} =
chronosCloseWait ChronosOutputtream(s).transport
chronosCloseWait ChronosOutputStream(s).transport
)
func chronosOutput*(s: StreamTransport,
pageSize = defaultPageSize,
allowWaitFor = false): OutputStreamHandle =
makeHandle ChronosOutputStream(
vtable: vtableAddr(chronosOuputVTable),
buffers: initPageBuffers(pageSize)
allowWaitFor = false): AsyncOutputStream =
AsyncOutputStream ChronosOutputStream(
vtable: vtableAddr(chronosOutputVTable),
buffers: initPageBuffers(pageSize),
transport: s,
allowWaitFor: allowWaitFor)