libc/include/sys/epoll.h

/*
 * Copyright (C) 2008 The Android Open Source Project
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  * Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *  * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "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
 * COPYRIGHT OWNER OR CONTRIBUTORS 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 _SYS_EPOLL_H_
#define _SYS_EPOLL_H_

#include <sys/cdefs.h>
#include <sys/types.h>
#include <signal.h> /* For sigset_t. */

#include <linux/eventpoll.h>

__BEGIN_DECLS

typedef union epoll_data {
  void* ptr;
  int fd;
  uint32_t u32;
  uint64_t u64;
} epoll_data_t;

struct epoll_event {
  uint32_t events;
  epoll_data_t data;
}
#ifdef __x86_64__
__packed
#endif
;

int epoll_create(int);
int epoll_create1(int) __INTRODUCED_IN(21);

/*
 * Some third-party code uses the existence of EPOLL_CLOEXEC to detect the
 * availability of epoll_create1. This is not correct, since having up-to-date
 * UAPI headers says nothing about the C library, but for the time being we
 * don't want to harm adoption to the unified headers. We'll undef EPOLL_CLOEXEC
 * if we don't have epoll_create1 for the time being, and maybe revisit this
 * later.
 *
 * https://github.com/android-ndk/ndk/issues/302
 * https://github.com/android-ndk/ndk/issues/394
 */
#if __ANDROID_API__ < __ANDROID_API_L__ && defined(EPOLL_CLOEXEC)
#undef EPOLL_CLOEXEC
#endif

int epoll_ctl(int, int, int, struct epoll_event*);
int epoll_wait(int, struct epoll_event*, int, int);
int epoll_pwait(int, struct epoll_event*, int, int, const sigset_t*) __INTRODUCED_IN(21);

__END_DECLS

#endif  /* _SYS_EPOLL_H_ */