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Fix double completion issue in reading procedures.

This commit is contained in:
cheatfate 2018-07-24 16:23:35 +03:00
parent 2ef7469d71
commit f1cf6d36fc
1 changed files with 6 additions and 22 deletions
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28
asyncdispatch2/transports/stream.nim
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@ -132,10 +132,6 @@ template setReadError(t, e: untyped) =
(t).state.incl(ReadError)
(t).error = newException(TransportOsError, osErrorMsg((e)))
template finishReader(t: untyped) =
var reader = (t).reader
reader.complete()
template checkPending(t: untyped) =
if not isNil((t).reader):
raise newException(TransportError, "Read operation already pending!")
@ -319,7 +315,8 @@ when defined(windows):
transp.setReadError(err)
if not isNil(transp.reader):
if not transp.reader.finished:
transp.finishReader()
transp.reader.complete()
transp.reader = nil
if ReadPaused in transp.state:
# Transport buffer is full, so we will not continue on reading.
break
@ -346,13 +343,15 @@ when defined(windows):
elif int32(err) in {WSAECONNRESET, WSAENETRESET}:
if not isNil(transp.reader):
transp.state = {ReadEof, ReadPaused}
transp.finishReader()
transp.reader.complete()
transp.reader = nil
elif int32(err) != ERROR_IO_PENDING:
transp.state.excl(ReadPending)
transp.state.incl(ReadPaused)
transp.setReadError(err)
if not isNil(transp.reader):
transp.finishReader()
transp.reader.complete()
transp.reader = nil
## Finish Loop
break
@ -967,9 +966,6 @@ proc readExactly*(transp: StreamTransport, pbytes: pointer,
if ReadPaused in transp.state:
transp.resumeRead()
await transp.reader
# we need to clear transp.reader to avoid double completion of this
# Future[T], because readLoop continues working.
transp.reader = nil
proc readOnce*(transp: StreamTransport, pbytes: pointer,
nbytes: int): Future[int] {.async.} =
@ -1057,9 +1053,6 @@ proc readUntil*(transp: StreamTransport, pbytes: pointer, nbytes: int,
if ReadPaused in transp.state:
transp.resumeRead()
await transp.reader
# we need to clear transp.reader to avoid double completion of this
# Future[T], because readLoop continues working.
transp.reader = nil
proc readLine*(transp: StreamTransport, limit = 0,
sep = "\r\n"): Future[string] {.async.} =
@ -1111,9 +1104,6 @@ proc readLine*(transp: StreamTransport, limit = 0,
if ReadPaused in transp.state:
transp.resumeRead()
await transp.reader
# we need to clear transp.reader to avoid double completion of this
# Future[T], because readLoop continues working.
transp.reader = nil
proc read*(transp: StreamTransport, n = -1): Future[seq[byte]] {.async.} =
## Read all bytes (n == -1) or exactly `n` bytes from transport ``transp``.
@ -1157,9 +1147,6 @@ proc read*(transp: StreamTransport, n = -1): Future[seq[byte]] {.async.} =
if ReadPaused in transp.state:
transp.resumeRead()
await transp.reader
# we need to clear transp.reader to avoid double completion of this
# Future[T], because readLoop continues working.
transp.reader = nil
proc consume*(transp: StreamTransport, n = -1): Future[int] {.async.} =
## Consume all bytes (n == -1) or ``n`` bytes from transport ``transp``.
@ -1195,9 +1182,6 @@ proc consume*(transp: StreamTransport, n = -1): Future[int] {.async.} =
if ReadPaused in transp.state:
transp.resumeRead()
await transp.reader
# we need to clear transp.reader to avoid double completion of this
# Future[T], because readLoop continues working.
transp.reader = nil
proc join*(transp: StreamTransport) {.async.} =
## Wait until ``transp`` will not be closed.