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/*
* Copyright (C) 2015 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
#include <sys/cdefs.h>
#if __ANDROID_API__ < 21
#include <errno.h>
#include <signal.h>
#include <string.h>
__BEGIN_DECLS
sighandler_t bsd_signal(int __signal, sighandler_t __handler) __REMOVED_IN(21);
/* These weren't introduced until L. */
int __libc_current_sigrtmax() __attribute__((__weak__)) __VERSIONER_NO_GUARD;
int __libc_current_sigrtmin() __attribute__((__weak__)) __VERSIONER_NO_GUARD;
static __inline int __ndk_legacy___libc_current_sigrtmax() {
/*
* The NDK doesn't use libclang_rt.builtins yet (https://github.com/android/ndk/issues/1231) so it
* can't use __builtin_available, but the platform builds with -Werror=unguarded-availability so
* it requires __builtin_available.
*/
#if defined(__ANDROID_UNAVAILABLE_SYMBOLS_ARE_WEAK__)
if (__builtin_available(android 21, *)) {
#else
if (__libc_current_sigrtmax) {
#endif
return __libc_current_sigrtmax();
}
return __SIGRTMAX; /* Should match __libc_current_sigrtmax. */
}
static __inline int __ndk_legacy___libc_current_sigrtmin() {
/*
* The NDK doesn't use libclang_rt.builtins yet (https://github.com/android/ndk/issues/1231) so it
* can't use __builtin_available, but the platform builds with -Werror=unguarded-availability so
* it requires __builtin_available.
*/
#if defined(__ANDROID_UNAVAILABLE_SYMBOLS_ARE_WEAK__)
if (__builtin_available(android 21, *)) {
#else
if (__libc_current_sigrtmin) {
#endif
return __libc_current_sigrtmin();
}
return __SIGRTMIN + 7; /* Should match __libc_current_sigrtmin. */
}
#undef SIGRTMAX
#define SIGRTMAX __ndk_legacy___libc_current_sigrtmax()
#undef SIGRTMIN
#define SIGRTMIN __ndk_legacy___libc_current_sigrtmin()
static __inline int sigismember(const sigset_t *set, int signum) {
/* Signal numbers start at 1, but bit positions start at 0. */
int bit = signum - 1;
const unsigned long *local_set = (const unsigned long *)set;
if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
return (int)((local_set[bit / (8 * sizeof(long))] >> (bit % (8 * sizeof(long)))) & 1);
}
static __inline int sigaddset(sigset_t *set, int signum) {
/* Signal numbers start at 1, but bit positions start at 0. */
int bit = signum - 1;
unsigned long *local_set = (unsigned long *)set;
if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
local_set[bit / (8 * sizeof(long))] |= 1UL << (bit % (8 * sizeof(long)));
return 0;
}
static __inline int sigdelset(sigset_t *set, int signum) {
/* Signal numbers start at 1, but bit positions start at 0. */
int bit = signum - 1;
unsigned long *local_set = (unsigned long *)set;
if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
local_set[bit / (8 * sizeof(long))] &= ~(1UL << (bit % (8 * sizeof(long))));
return 0;
}
static __inline int sigemptyset(sigset_t *set) {
if (set == NULL) {
errno = EINVAL;
return -1;
}
memset(set, 0, sizeof(sigset_t));
return 0;
}
static __inline int sigfillset(sigset_t *set) {
if (set == NULL) {
errno = EINVAL;
return -1;
}
memset(set, ~0, sizeof(sigset_t));
return 0;
}
static __inline sighandler_t signal(int s, sighandler_t f) {
return bsd_signal(s, f);
}
__END_DECLS
#endif
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