defer-internal.h

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Author : Nick Mathewson
Date : 2009-04-10 14:22:33
Hash : 4868f4d2
Message : 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

defer-internal.h

/*
 * 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_ */

kc3-lang/libevent/defer-internal.h

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kc3-lang/libevent /defer-internal.h