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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/contrib/libevent/defer-internal.h
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/*

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 * Copyright (c) 2009-2012 Niels Provos and Nick Mathewson

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 *

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 * Redistribution and use in source and binary forms, with or without

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 * modification, are permitted provided that the following conditions

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 * are met:

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 * 1. Redistributions of source code must retain the above copyright

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 *    notice, this list of conditions and the following disclaimer.

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 * 2. Redistributions in binary form must reproduce the above copyright

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 *    notice, this list of conditions and the following disclaimer in the

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 *    documentation and/or other materials provided with the distribution.

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 * 3. The name of the author may not be used to endorse or promote products

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 *    derived from this software without specific prior written permission.

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 *

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 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

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 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

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 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

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 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

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 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

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 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

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 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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 */

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#ifndef DEFER_INTERNAL_H_INCLUDED_

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#define DEFER_INTERNAL_H_INCLUDED_

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#ifdef __cplusplus

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extern "C" {

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#endif

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#include "event2/event-config.h"

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#include "evconfig-private.h"

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#include <sys/queue.h>

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struct event_callback;

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typedef void (*deferred_cb_fn)(struct event_callback *, void *);

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/**

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   Initialize an empty, non-pending event_callback.

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   @param deferred The struct event_callback structure to initialize.

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   @param priority The priority that the callback should run at.

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   @param cb The function to run when the struct event_callback executes.

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   @param arg The function's second argument.

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 */

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EVENT2_EXPORT_SYMBOL

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void event_deferred_cb_init_(struct event_callback *, ev_uint8_t, deferred_cb_fn, void *);

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/**

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   Change the priority of a non-pending event_callback.

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 */

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void event_deferred_cb_set_priority_(struct event_callback *, ev_uint8_t);

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/**

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   Cancel a struct event_callback if it is currently scheduled in an event_base.

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 */

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EVENT2_EXPORT_SYMBOL

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void event_deferred_cb_cancel_(struct event_base *, struct event_callback *);

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/**

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   Activate a struct event_callback if it is not currently scheduled in an event_base.

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   Return true if it was not previously scheduled.

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 */

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EVENT2_EXPORT_SYMBOL

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int event_deferred_cb_schedule_(struct event_base *, struct event_callback *);

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#ifdef __cplusplus

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}

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#endif

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#endif /* EVENT_INTERNAL_H_INCLUDED_ */

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