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iochannel: Avoid unnecessary wakeup after successful write

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To save some CPU (in low latency scenarios), don't re-enable the
"writable" event after it has succeeded. It is very likely the next
write will succeed right away too.

This means that we always need to handle EAGAIN/EWOULDBLOCK as a
successful write of 0 bytes, so I also verified that all callers to
pa_iochannel_write handled this correctly.

Signed-off-by: David Henningsson <david.henningsson@canonical.com>
This commit is contained in:
David Henningsson 2013-06-13 14:26:09 +02:00 • committed by Tanu Kaskinen
parent e2d1421f61
commit 9c4dcffca5
6 changed files with 17 additions and 21 deletions
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4
src/pulsecore/protocol-http.c
View file

@ -162,10 +162,6 @@ static int do_write(struct connection *c) {
pa_memblock_unref(chunk.memblock);
if (r < 0) {
if (errno == EINTR || errno == EAGAIN)
return 0;
pa_log("write(): %s", pa_cstrerror(errno));
return -1;
}