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fixes tryRecv

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This commit is contained in:
Araq
2014-10-20 01:09:54 +02:00
parent 4aab018bd6
commit 60a7532bda
1 changed files with 4 additions and 3 deletions
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7
lib/system/channels.nim
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@@ -226,15 +226,16 @@ proc recv*[TMsg](c: var TChannel[TMsg]): TMsg =
llRecv(q, addr(result), cast[PNimType](getTypeInfo(result)))
releaseSys(q.lock)
proc tryRecv*[TMsg](c: var TChannel[TMsg]): tuple[dataAvaliable: bool,
proc tryRecv*[TMsg](c: var TChannel[TMsg]): tuple[dataAvailable: bool,
msg: TMsg] =
## try to receives a message from the channel `c` if available. Otherwise
## it returns ``(false, default(msg))``.
var q = cast[PRawChannel](addr(c))
if q.mask != ChannelDeadMask:
lockChannel(q):
if q.mask != ChannelDeadMask:
if tryAcquireSys(q.lock):
llRecv(q, addr(result.msg), cast[PNimType](getTypeInfo(result.msg)))
result.dataAvaliable = true
releaseSys(q.lock)
proc peek*[TMsg](c: var TChannel[TMsg]): int =
## returns the current number of messages in the channel `c`. Returns -1