1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/ipc/chromium/src/third_party/libevent/defer-internal.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,100 @@
1.4 +/*
1.5 + * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson
1.6 + *
1.7 + * Redistribution and use in source and binary forms, with or without
1.8 + * modification, are permitted provided that the following conditions
1.9 + * are met:
1.10 + * 1. Redistributions of source code must retain the above copyright
1.11 + * notice, this list of conditions and the following disclaimer.
1.12 + * 2. Redistributions in binary form must reproduce the above copyright
1.13 + * notice, this list of conditions and the following disclaimer in the
1.14 + * documentation and/or other materials provided with the distribution.
1.15 + * 3. The name of the author may not be used to endorse or promote products
1.16 + * derived from this software without specific prior written permission.
1.17 + *
1.18 + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
1.19 + * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
1.20 + * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
1.21 + * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
1.22 + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
1.23 + * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
1.24 + * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
1.25 + * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
1.26 + * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
1.27 + * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
1.28 + */
1.29 +#ifndef _DEFER_INTERNAL_H_
1.30 +#define _DEFER_INTERNAL_H_
1.31 +
1.32 +#ifdef __cplusplus
1.33 +extern "C" {
1.34 +#endif
1.35 +
1.36 +#include "event2/event-config.h"
1.37 +#include <sys/queue.h>
1.38 +
1.39 +struct deferred_cb;
1.40 +
1.41 +typedef void (*deferred_cb_fn)(struct deferred_cb *, void *);
1.42 +
1.43 +/** A deferred_cb is a callback that can be scheduled to run as part of
1.44 + * an event_base's event_loop, rather than running immediately. */
1.45 +struct deferred_cb {
1.46 + /** Links to the adjacent active (pending) deferred_cb objects. */
1.47 + TAILQ_ENTRY (deferred_cb) cb_next;
1.48 + /** True iff this deferred_cb is pending in an event_base. */
1.49 + unsigned queued : 1;
1.50 + /** The function to execute when the callback runs. */
1.51 + deferred_cb_fn cb;
1.52 + /** The function's second argument. */
1.53 + void *arg;
1.54 +};
1.55 +
1.56 +/** A deferred_cb_queue is a list of deferred_cb that we can add to and run. */
1.57 +struct deferred_cb_queue {
1.58 + /** Lock used to protect the queue. */
1.59 + void *lock;
1.60 +
1.61 + /** How many entries are in the queue? */
1.62 + int active_count;
1.63 +
1.64 + /** Function called when adding to the queue from another thread. */
1.65 + void (*notify_fn)(struct deferred_cb_queue *, void *);
1.66 + void *notify_arg;
1.67 +
1.68 + /** Deferred callback management: a list of deferred callbacks to
1.69 + * run active the active events. */
1.70 + TAILQ_HEAD (deferred_cb_list, deferred_cb) deferred_cb_list;
1.71 +};
1.72 +
1.73 +/**
1.74 + Initialize an empty, non-pending deferred_cb.
1.75 +
1.76 + @param deferred The deferred_cb structure to initialize.
1.77 + @param cb The function to run when the deferred_cb executes.
1.78 + @param arg The function's second argument.
1.79 + */
1.80 +void event_deferred_cb_init(struct deferred_cb *, deferred_cb_fn, void *);
1.81 +/**
1.82 + Cancel a deferred_cb if it is currently scheduled in an event_base.
1.83 + */
1.84 +void event_deferred_cb_cancel(struct deferred_cb_queue *, struct deferred_cb *);
1.85 +/**
1.86 + Activate a deferred_cb if it is not currently scheduled in an event_base.
1.87 + */
1.88 +void event_deferred_cb_schedule(struct deferred_cb_queue *, struct deferred_cb *);
1.89 +
1.90 +#define LOCK_DEFERRED_QUEUE(q) \
1.91 + EVLOCK_LOCK((q)->lock, 0)
1.92 +#define UNLOCK_DEFERRED_QUEUE(q) \
1.93 + EVLOCK_UNLOCK((q)->lock, 0)
1.94 +
1.95 +#ifdef __cplusplus
1.96 +}
1.97 +#endif
1.98 +
1.99 +void event_deferred_cb_queue_init(struct deferred_cb_queue *);
1.100 +struct deferred_cb_queue *event_base_get_deferred_cb_queue(struct event_base *);
1.101 +
1.102 +#endif /* _EVENT_INTERNAL_H_ */
1.103 +
