kqueue-internal.h

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Author : Nick Mathewson
Date : 2010-09-17 00:34:13
Hash : 53a07fe2
Message : Replace pipe-based notification with EVFILT_USER where possible Sufficiently recent kqueue implementations have an EVFILT_USER filter that we can use to wake up an event base from another thread. When it's supported, we now use this mechanism rather than our old (pipe-based) mechanism. This should save some time and complications on newer OSX and freebsds.

kqueue-internal.h

/*
 * Copyright (c) 2012 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 KQUEUE_INTERNAL_H_INCLUDED_
#define KQUEUE_INTERNAL_H_INCLUDED_

/** Notification function, used to tell an event base to wake up from another
 * thread.  Only works when event_kq_add_notify_event_() has previously been
 * called successfully on that base. */
int event_kq_notify_base_(struct event_base *base);

/** Prepare a kqueue-using event base to receive notifications via an internal
 * EVFILT_USER event.  Return 0 on sucess, -1 on failure.
 */
int event_kq_add_notify_event_(struct event_base *base);

#endif

kc3-lang/libevent/kqueue-internal.h

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kc3-lang/libevent /kqueue-internal.h