| /* |
| * 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_ */ |