99 lines
3.2 KiB
C
99 lines
3.2 KiB
C
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/*
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* Copyright (C) 2015 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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#ifndef _ANDROID_LEGACY_SIGNAL_INLINES_H_
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#define _ANDROID_LEGACY_SIGNAL_INLINES_H_
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#include <string.h>
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#include <sys/cdefs.h>
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__BEGIN_DECLS
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extern sighandler_t bsd_signal(int signum, sighandler_t handler);
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static __inline int sigismember(sigset_t *set, int signum) {
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/* Signal numbers start at 1, but bit positions start at 0. */
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int bit = signum - 1;
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const unsigned long *local_set = (const unsigned long *)set;
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if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
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errno = EINVAL;
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return -1;
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}
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return (int)((local_set[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1);
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}
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static __inline int sigaddset(sigset_t *set, int signum) {
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/* Signal numbers start at 1, but bit positions start at 0. */
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int bit = signum - 1;
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unsigned long *local_set = (unsigned long *)set;
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if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
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errno = EINVAL;
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return -1;
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}
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local_set[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT);
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return 0;
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}
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static __inline int sigdelset(sigset_t *set, int signum) {
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/* Signal numbers start at 1, but bit positions start at 0. */
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int bit = signum - 1;
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unsigned long *local_set = (unsigned long *)set;
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if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
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errno = EINVAL;
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return -1;
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}
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local_set[bit / LONG_BIT] &= ~(1UL << (bit % LONG_BIT));
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return 0;
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}
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static __inline int sigemptyset(sigset_t *set) {
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if (set == NULL) {
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errno = EINVAL;
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return -1;
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}
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memset(set, 0, sizeof(sigset_t));
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return 0;
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}
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static __inline int sigfillset(sigset_t *set) {
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if (set == NULL) {
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errno = EINVAL;
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return -1;
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}
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memset(set, ~0, sizeof(sigset_t));
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return 0;
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}
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static __inline sighandler_t signal(int s, sighandler_t f) {
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return bsd_signal(s, f);
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}
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__END_DECLS
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#endif /* _ANDROID_LEGACY_SIGNAL_INLINES_H_ */
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