The Tor Browser: ipc/chromium/src/third_party/libevent/epoll

     1 /*

     2  * Copyright 2003-2009 Niels Provos <provos@citi.umich.edu>

     3  * Copyright 2009-2012 Niels Provos and Nick Mathewson

     4  *

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

     6  * modification, are permitted provided that the following conditions

     7  * are met:

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

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

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

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

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

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

    14  *    derived from this software without specific prior written permission.

    15  *

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

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

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

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

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

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

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

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

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

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

    26  */

    27 #include <stdint.h>

    29 #include <sys/param.h>

    30 #include <sys/types.h>

    31 #include <sys/syscall.h>

    32 #include <sys/epoll.h>

    33 #include <unistd.h>

    34 #include <errno.h>

    36 int

    37 epoll_create(int size)

    38 {

    39 #if !defined(__NR_epoll_create) && defined(__NR_epoll_create1)

    40 	if (size <= 0) {

    41 		errno = EINVAL;

    42 		return -1;

    43 	}

    44 	return (syscall(__NR_epoll_create1, 0));

    45 #else

    46 	return (syscall(__NR_epoll_create, size));

    47 #endif

    48 }

    50 int

    51 epoll_ctl(int epfd, int op, int fd, struct epoll_event *event)

    52 {

    54 	return (syscall(__NR_epoll_ctl, epfd, op, fd, event));

    55 }

    57 int

    58 epoll_wait(int epfd, struct epoll_event *events, int maxevents, int timeout)

    59 {

    60 #if !defined(__NR_epoll_wait) && defined(__NR_epoll_pwait)

    61 	return (syscall(__NR_epoll_pwait, epfd, events, maxevents, timeout, NULL, 0));

    62 #else

    63 	return (syscall(__NR_epoll_wait, epfd, events, maxevents, timeout));

    64 #endif

    65 }

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