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Add bufferevent_lock()/bufferevent_unlock()

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Although bufferevent operations are threadsafe, sometimes you need
to make sure that a few operations on a single bufferevent will all
be executed with nothing intervening.  That's what these functions
are for.
This commit is contained in:
Nick Mathewson 2010-06-21 12:26:21 -04:00
parent 7b259b6796
commit 215e629cd4
2 changed files with 26 additions and 0 deletions
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14
bufferevent.c
View File

@ -825,3 +825,17 @@ _bufferevent_add_event(struct event *ev, const struct timeval *tv)
else
return event_add(ev, tv);
}
/* For use by user programs only; internally, we should be calling
either _bufferevent_incref_and_lock(), or BEV_LOCK. */
void
bufferevent_lock(struct bufferevent *bev)
{
_bufferevent_incref_and_lock(bev);
}
void
bufferevent_unlock(struct bufferevent *bev)
{
_bufferevent_decref_and_unlock(bev);
}

12
include/event2/bufferevent.h
View File

@ -423,6 +423,18 @@ int bufferevent_set_timeouts(struct bufferevent *bufev,
void bufferevent_setwatermark(struct bufferevent *bufev, short events,
size_t lowmark, size_t highmark);
/**
Acquire the lock on a bufferevent. Has no effect if locking was not
enabled with BEV_OPT_THREADSAFE.
*/
void bufferevent_lock(struct bufferevent *bufev);
/**
Release the lock on a bufferevent. Has no effect if locking was not
enabled with BEV_OPT_THREADSAFE.
*/
void bufferevent_unlock(struct bufferevent *bufev);
/**
Flags that can be passed into filters to let them know how to
deal with the incoming data.