diff options
author | Nick Mathewson <nickm@torproject.org> | 2009-04-10 14:22:33 +0000 |
---|---|---|
committer | Nick Mathewson <nickm@torproject.org> | 2009-04-10 14:22:33 +0000 |
commit | 4868f4d217d19d4b0f4e45c4648460c21bc5f80f (patch) | |
tree | ea6d3591e9b4004690dac2a61ef667f191afd13f /defer-internal.h | |
parent | e3d82497c99d9cb3b1b23cc746b448811910e260 (diff) | |
download | libevent-4868f4d217d19d4b0f4e45c4648460c21bc5f80f.tar.gz |
Initial support for a lightweight 'deferred callbacks'.
A 'deferred callback' is just a function that we've queued in the
event base. This ability is needed for some mt stuff, and for complex
callback chains. For internal use only.
svn:r1150
Diffstat (limited to 'defer-internal.h')
-rw-r--r-- | defer-internal.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/defer-internal.h b/defer-internal.h new file mode 100644 index 00000000..1f451c13 --- /dev/null +++ b/defer-internal.h @@ -0,0 +1,56 @@ +/* + * Copyright (c) 2009 Niels Provos and Nick Mathewson + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. + */ +#ifndef _DEFER_INTERNAL_H_ +#define _DEFER_INTERNAL_H_ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "event-config.h" +#include <sys/queue.h> + +struct deferred_cb; + +typedef void (*deferred_cb_fn)(struct deferred_cb *, void *); + +struct deferred_cb { + TAILQ_ENTRY (deferred_cb) (cb_next); + unsigned queued : 1; + deferred_cb_fn cb; + void *arg; +}; + +void event_deferred_cb_init(struct deferred_cb *, deferred_cb_fn, void *); +void event_deferred_cb_cancel(struct event_base *, struct deferred_cb *); +void event_deferred_cb_schedule(struct event_base *, struct deferred_cb *); + +#ifdef __cplusplus +} +#endif + +#endif /* _EVENT_INTERNAL_H_ */ + |