diff options
Diffstat (limited to 'generic/tclIO.c')
| -rw-r--r-- | generic/tclIO.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/generic/tclIO.c b/generic/tclIO.c index e46a22a..b97f57a 100644 --- a/generic/tclIO.c +++ b/generic/tclIO.c @@ -2657,6 +2657,8 @@ FlushChannel( * the post-condition that on a successful return to caller we've * left space in the current output buffer for more writing (the flush * call was to make new room). + * If the channel is blocking, then yes, so we guarantee that + * blocking flushes actually flush all pending data. * Otherwise, no. Keep the current output buffer where it is so more * can be written to it, possibly filling it, to promote more efficient * buffer usage. @@ -2664,7 +2666,8 @@ FlushChannel( bufPtr = statePtr->curOutPtr; if (bufPtr && BytesLeft(bufPtr) && /* Keep empties off queue */ - (statePtr->outQueueHead == NULL || IsBufferFull(bufPtr))) { + (statePtr->outQueueHead == NULL || IsBufferFull(bufPtr) + || !GotFlag(statePtr, CHANNEL_NONBLOCKING))) { if (statePtr->outQueueHead == NULL) { statePtr->outQueueHead = bufPtr; } else { |