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Tweak the inlining of stream.write

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This commit is contained in:
Zahary Karadjov 2020-05-05 19:23:28 +03:00
commit 0d90e444c2
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1 changed files with 29 additions and 20 deletions
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49
faststreams/outputs.nim
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@ -445,23 +445,22 @@ proc tryMovingToNextPage(c: var WriteCursor) =
# pre-allocated cursor span, which is considered a Defect (a range error)
fsAssert false, "Attempt to write past the end of a cursor"
template writeByteImpl(s: OutputStream, b: byte, awaiter, writeOp, drainOp: untyped) =
if atEnd(s.span):
# Unsafe memory outputs don't use pages at all, so if our cursor
# reached here, this is a range violation defect:
fsAssert canExtendOutput(s)
template writeToNewSpanImpl(s: OutputStream, b: byte, awaiter, writeOp, drainOp: untyped) =
# Unsafe memory outputs don't use pages at all, so if our cursor
# reached here, this is a range violation defect:
fsAssert canExtendOutput(s)
if s.vtable == nil or s.extCursorsCount > 0:
# This is the main cursor of a stream, but we are either not
# ready to flush due to outstanding delayed writes or this is
# just a memory output stream. In both cases, we just need to
# allocate more memory and continue writing:
addPage(s)
elif s.buffers == nil:
awaiter s.vtable.writeOp(nil, unsafeAddr b, 1)
else:
trackWrittenToEnd(s.buffers)
awaiter drainOp(s, nil, 0)
if s.vtable == nil or s.extCursorsCount > 0:
# This is the main cursor of a stream, but we are either not
# ready to flush due to outstanding delayed writes or this is
# just a memory output stream. In both cases, we just need to
# allocate more memory and continue writing:
addPage(s)
elif s.buffers == nil:
awaiter s.vtable.writeOp(nil, unsafeAddr b, 1)
else:
trackWrittenToEnd(s.buffers)
awaiter drainOp(s, nil, 0)
writeByte(s.span, b)
@ -474,8 +473,15 @@ proc write*(c: var WriteCursor, b: byte) =
writeByte(c.span, b)
proc write*(s: OutputStream, b: byte) =
writeByteImpl(s, b, noAwait, writeSync, drainAllBuffersSync)
proc writeToNewSpan(s: OutputStream, b: byte) =
writeToNewSpanImpl(s, b, noAwait, writeSync, drainAllBuffersSync)
template write*(sp: OutputStream, b: byte) =
let s = sp
if hasRunway(s.span):
writeByte(s.span, b)
else:
writeToNewSpan(s, b)
proc write*(sp: AsyncOutputStream, b: byte) =
let s = OutputStream sp
@ -484,8 +490,11 @@ proc write*(sp: AsyncOutputStream, b: byte) =
writeByte(s.span, b)
template writeAndWait*(sp: AsyncOutputStream, b: byte) =
let s = sp
writeByteImpl(s, b, fsAwait, writeAsync, drainAllBuffersAsync)
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)