| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| /** |
| * @file poll.h |
| * @brief Wait for events on a set of file descriptors. |
| */ |
| |
| #include <sys/cdefs.h> |
| #include <linux/poll.h> |
| #include <signal.h> /* For sigset_t. */ |
| #include <time.h> /* For timespec. */ |
| |
| __BEGIN_DECLS |
| |
| /** The type of a file descriptor count, used by poll() and ppoll(). */ |
| typedef unsigned int nfds_t; |
| |
| /** |
| * [poll(3)](http://man7.org/linux/man-pages/man3/poll.3.html) waits on a set of file descriptors. |
| * |
| * Returns the number of ready file descriptors on success, 0 for timeout, |
| * and returns -1 and sets `errno` on failure. |
| */ |
| int poll(struct pollfd* _Nullable __fds, nfds_t __count, int __timeout_ms); |
| |
| /** |
| * [ppoll(3)](http://man7.org/linux/man-pages/man3/ppoll.3.html) waits on a set of file descriptors |
| * or a signal. Set `__timeout` to null for no timeout. Set `__mask` to null to not set the signal |
| * mask. |
| * |
| * Returns the number of ready file descriptors on success, 0 for timeout, |
| * and returns -1 and sets `errno` on failure. |
| * |
| * Available since API level 28. |
| */ |
| int ppoll(struct pollfd* _Nullable __fds, nfds_t __count, const struct timespec* _Nullable __timeout, const sigset_t* _Nullable __mask) __INTRODUCED_IN(21); |
| |
| /** |
| * Like ppoll() but allows setting a signal mask with RT signals even from a 32-bit process. |
| */ |
| int ppoll64(struct pollfd* _Nullable __fds, nfds_t __count, const struct timespec* _Nullable __timeout, const sigset64_t* _Nullable __mask) __INTRODUCED_IN(28); |
| |
| #if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS) |
| #define _POLL_H_ |
| #include <bits/fortify/poll.h> |
| #undef _POLL_H_ |
| #endif |
| |
| __END_DECLS |
