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77 lines
2.9 KiB
77 lines
2.9 KiB
/* |
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* Copyright (C) 2008 The Android Open Source Project |
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* All rights reserved. |
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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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* * 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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* * Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in |
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* the documentation and/or other materials provided with the |
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* distribution. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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*/ |
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#pragma once |
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/** |
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* @file poll.h |
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* @brief Wait for events on a set of file descriptors. |
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*/ |
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#include <sys/cdefs.h> |
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#include <linux/poll.h> |
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#include <signal.h> /* For sigset_t. */ |
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#include <time.h> /* For timespec. */ |
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__BEGIN_DECLS |
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/** The type of a file descriptor count, used by poll() and ppoll(). */ |
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typedef unsigned int nfds_t; |
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/** |
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* [poll(3)](http://man7.org/linux/man-pages/man3/poll.3.html) waits on a set of file descriptors. |
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* |
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* Returns the number of ready file descriptors on success, 0 for timeout, |
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* and returns -1 and sets `errno` on failure. |
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*/ |
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int poll(struct pollfd* _Nullable __fds, nfds_t __count, int __timeout_ms); |
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/** |
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* [ppoll(3)](http://man7.org/linux/man-pages/man3/ppoll.3.html) waits on a set of file descriptors |
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* or a signal. Set `__timeout` to null for no timeout. Set `__mask` to null to not set the signal |
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* mask. |
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* |
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* Returns the number of ready file descriptors on success, 0 for timeout, |
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* and returns -1 and sets `errno` on failure. |
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* |
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* Available since API level 28. |
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*/ |
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int ppoll(struct pollfd* _Nullable __fds, nfds_t __count, const struct timespec* _Nullable __timeout, const sigset_t* _Nullable __mask) __INTRODUCED_IN(21); |
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/** |
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* Like ppoll() but allows setting a signal mask with RT signals even from a 32-bit process. |
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*/ |
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int ppoll64(struct pollfd* _Nullable __fds, nfds_t __count, const struct timespec* _Nullable __timeout, const sigset64_t* _Nullable __mask) __INTRODUCED_IN(28); |
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#if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS) |
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#define _POLL_H_ |
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#include <bits/fortify/poll.h> |
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#undef _POLL_H_ |
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#endif |
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__END_DECLS
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