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/*
* 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 _POLL_H_
#define _POLL_H_
#include <sys/cdefs.h>
#include <linux/poll.h>
#include <signal.h> /* For sigset_t. */
#include <time.h> /* For timespec. */
__BEGIN_DECLS
typedef unsigned int nfds_t;
int poll(struct pollfd*, nfds_t, int) __overloadable __RENAME_CLANG(poll);
#if __ANDROID_API__ >= 21
int ppoll(struct pollfd*, nfds_t, const struct timespec*, const sigset_t*)
__overloadable __RENAME_CLANG(ppoll) __INTRODUCED_IN(21);
#endif /* __ANDROID_API__ >= 21 */
#if __ANDROID_API__ >= 23
int __poll_chk(struct pollfd*, nfds_t, int, size_t) __INTRODUCED_IN(23);
int __ppoll_chk(struct pollfd*, nfds_t, const struct timespec*, const sigset_t*, size_t)
__INTRODUCED_IN(23);
#endif /* __ANDROID_API__ >= 23 */
#if defined(__BIONIC_FORTIFY)
#if __ANDROID_API__ >= __ANDROID_API_M__
#if defined(__clang__)
__BIONIC_ERROR_FUNCTION_VISIBILITY
int poll(struct pollfd* fds, nfds_t fd_count, int timeout) __overloadable
__enable_if(__bos(fds) != __BIONIC_FORTIFY_UNKNOWN_SIZE &&
__bos(fds) < sizeof(*fds) * fd_count,
"selected when there aren't fd_count fds")
__errorattr("too many fds specified");
__BIONIC_FORTIFY_INLINE
int poll(struct pollfd* const fds __pass_object_size, nfds_t fd_count,
int timeout) __overloadable {
size_t bos_fds = __bos(fds);
if (bos_fds == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __call_bypassing_fortify(poll)(fds, fd_count, timeout);
}
return __poll_chk(fds, fd_count, timeout, bos_fds);
}
__BIONIC_ERROR_FUNCTION_VISIBILITY
int ppoll(struct pollfd* fds, nfds_t fd_count, const struct timespec* timeout,
const sigset_t* mask) __overloadable
__enable_if(__bos(fds) != __BIONIC_FORTIFY_UNKNOWN_SIZE &&
__bos(fds) < sizeof(*fds) * fd_count,
"selected when there aren't fd_count fds")
__errorattr("too many fds specified");
__BIONIC_FORTIFY_INLINE
int ppoll(struct pollfd* const fds __pass_object_size, nfds_t fd_count,
const struct timespec* timeout, const sigset_t* mask) __overloadable {
size_t bos_fds = __bos(fds);
if (bos_fds == __BIONIC_FORTIFY_UNKNOWN_SIZE) {
return __call_bypassing_fortify(ppoll)(fds, fd_count, timeout, mask);
}
return __ppoll_chk(fds, fd_count, timeout, mask, bos_fds);
}
#else /* defined(__clang__) */
int __poll_real(struct pollfd*, nfds_t, int) __RENAME(poll);
__errordecl(__poll_too_small_error, "poll: pollfd array smaller than fd count");
int __ppoll_real(struct pollfd*, nfds_t, const struct timespec*, const sigset_t*) __RENAME(ppoll)
__INTRODUCED_IN(21);
__errordecl(__ppoll_too_small_error, "ppoll: pollfd array smaller than fd count");
__BIONIC_FORTIFY_INLINE
int poll(struct pollfd* fds, nfds_t fd_count, int timeout) {
if (__bos(fds) != __BIONIC_FORTIFY_UNKNOWN_SIZE) {
if (!__builtin_constant_p(fd_count)) {
return __poll_chk(fds, fd_count, timeout, __bos(fds));
} else if (__bos(fds) / sizeof(*fds) < fd_count) {
__poll_too_small_error();
}
}
return __poll_real(fds, fd_count, timeout);
}
__BIONIC_FORTIFY_INLINE
int ppoll(struct pollfd* fds, nfds_t fd_count, const struct timespec* timeout,
const sigset_t* mask) {
if (__bos(fds) != __BIONIC_FORTIFY_UNKNOWN_SIZE) {
if (!__builtin_constant_p(fd_count)) {
return __ppoll_chk(fds, fd_count, timeout, mask, __bos(fds));
} else if (__bos(fds) / sizeof(*fds) < fd_count) {
__ppoll_too_small_error();
}
}
return __ppoll_real(fds, fd_count, timeout, mask);
}
#endif /* defined(__clang__) */
#endif /* __ANDROID_API__ >= __ANDROID_API_M__ */
#endif /* defined(__BIONIC_FORTIFY) */
__END_DECLS
#endif /* _POLL_H_ */
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