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allow both read and write callbacks for bufferevents to be NULL

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svn:r227
This commit is contained in:
Niels Provos 2006-08-26 04:32:31 +00:00
parent 52bfcab894
commit c1eec7aae5
1 changed files with 7 additions and 2 deletions
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9
evbuffer.c
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@ -136,7 +136,8 @@ bufferevent_readcb(int fd, short event, void *arg)
} }
/* Invoke the user callback - must always be called last */ /* Invoke the user callback - must always be called last */
(*bufev->readcb)(bufev, bufev->cbarg); if (bufev->readcb != NULL)
(*bufev->readcb)(bufev, bufev->cbarg);
return; return;
reschedule: reschedule:
@ -183,7 +184,8 @@ bufferevent_writecb(int fd, short event, void *arg)
* Invoke the user callback if our buffer is drained or below the * Invoke the user callback if our buffer is drained or below the
* low watermark. * low watermark.
*/ */
if (EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low) if (bufev->writecb != NULL &&
EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
(*bufev->writecb)(bufev, bufev->cbarg); (*bufev->writecb)(bufev, bufev->cbarg);
return; return;
@ -203,6 +205,9 @@ bufferevent_writecb(int fd, short event, void *arg)
* The read callback is invoked whenever we read new data. * The read callback is invoked whenever we read new data.
* The write callback is invoked whenever the output buffer is drained. * The write callback is invoked whenever the output buffer is drained.
* The error callback is invoked on a write/read error or on EOF. * The error callback is invoked on a write/read error or on EOF.
*
* Both read and write callbacks maybe NULL. The error callback is not
* allowed to be NULL and have to be provided always.
*/ */
struct bufferevent * struct bufferevent *