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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 else
return event_add(ev, tv); 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, void bufferevent_setwatermark(struct bufferevent *bufev, short events,
size_t lowmark, size_t highmark); 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 Flags that can be passed into filters to let them know how to
deal with the incoming data. deal with the incoming data.