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add pin/unpin functions, and a deref-and-free pair.

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svn:r1165
This commit is contained in:
Nick Mathewson 2009-04-13 03:06:47 +00:00
parent dcda7915ac
commit 9f1a94ecec
2 changed files with 17 additions and 10 deletions
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24
buffer.c
View File

@ -231,23 +231,21 @@ evbuffer_chain_insert(struct evbuffer *buf, struct evbuffer_chain *chain)
buf->total_len += chain->off;
}
#ifdef NOT_USED_YET
static void
evbuffer_chain_pin(struct evbuffer_chain *chain, unsigned flag)
void
_evbuffer_chain_pin(struct evbuffer_chain *chain, unsigned flag)
{
assert((chain->flags & flag) == 0);
chain->flags |= flag;
}
static void
evbuffer_chain_unpin(struct evbuffer_chain *chain, unsigned flag)
void
_evbuffer_chain_unpin(struct evbuffer_chain *chain, unsigned flag)
{
assert((chain->flags & flag) != 0);
chain->flags &= ~flag;
if (chain->flags & EVBUFFER_DANGLING)
evbuffer_chain_free(chain);
}
#endif
struct evbuffer *
evbuffer_new(void)
@ -370,8 +368,7 @@ evbuffer_deferred_callback(struct deferred_cb *cb, void *arg)
EVBUFFER_LOCK(buffer, EVTHREAD_WRITE);
evbuffer_run_callbacks(buffer);
evbuffer_free(buffer); /* release the reference */
EVBUFFER_UNLOCK(buffer, EVTHREAD_WRITE);
_evbuffer_decref_and_unlock(buffer);
}
static void
@ -386,11 +383,11 @@ evbuffer_remove_all_callbacks(struct evbuffer *buffer)
}
void
evbuffer_free(struct evbuffer *buffer)
_evbuffer_decref_and_unlock(struct evbuffer *buffer)
{
struct evbuffer_chain *chain, *next;
ASSERT_EVBUFFER_LOCKED(buffer);
EVBUFFER_LOCK(buffer, EVTHREAD_WRITE);
if (--buffer->refcnt > 0) {
EVBUFFER_UNLOCK(buffer, EVTHREAD_WRITE);
return;
@ -410,6 +407,13 @@ evbuffer_free(struct evbuffer *buffer)
mm_free(buffer);
}
void
evbuffer_free(struct evbuffer *buffer)
{
EVBUFFER_LOCK(buffer, EVTHREAD_WRITE);
_evbuffer_decref_and_unlock(buffer);
}
void
evbuffer_lock(struct evbuffer *buf)
{

3
evbuffer-internal.h
View File

@ -194,6 +194,9 @@ struct evbuffer_chain_reference {
} while(0)
void _evbuffer_incref(struct evbuffer *buf);
void _evbuffer_chain_pin(struct evbuffer_chain *chain, unsigned flag);
void _evbuffer_chain_unpin(struct evbuffer_chain *chain, unsigned flag);
void _evbuffer_decref_and_unlock(struct evbuffer *buffer);
#ifdef _EVENT_HAVE_SYS_UIO_H
int _evbuffer_read_setup_vecs(struct evbuffer *buf, ssize_t howmuch,