1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #ifndef _ANDROID_LEGACY_SIGNAL_INLINES_H_
30 #define _ANDROID_LEGACY_SIGNAL_INLINES_H_
31
32 #include <string.h>
33 #include <sys/cdefs.h>
34
35 __BEGIN_DECLS
36
37 extern sighandler_t bsd_signal(int signum, sighandler_t handler);
38
sigismember(sigset_t * set,int signum)39 static __inline int sigismember(sigset_t *set, int signum) {
40 /* Signal numbers start at 1, but bit positions start at 0. */
41 int bit = signum - 1;
42 const unsigned long *local_set = (const unsigned long *)set;
43 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
44 errno = EINVAL;
45 return -1;
46 }
47 return (int)((local_set[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1);
48 }
49
sigaddset(sigset_t * set,int signum)50 static __inline int sigaddset(sigset_t *set, int signum) {
51 /* Signal numbers start at 1, but bit positions start at 0. */
52 int bit = signum - 1;
53 unsigned long *local_set = (unsigned long *)set;
54 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
55 errno = EINVAL;
56 return -1;
57 }
58 local_set[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT);
59 return 0;
60 }
61
sigdelset(sigset_t * set,int signum)62 static __inline int sigdelset(sigset_t *set, int signum) {
63 /* Signal numbers start at 1, but bit positions start at 0. */
64 int bit = signum - 1;
65 unsigned long *local_set = (unsigned long *)set;
66 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
67 errno = EINVAL;
68 return -1;
69 }
70 local_set[bit / LONG_BIT] &= ~(1UL << (bit % LONG_BIT));
71 return 0;
72 }
73
sigemptyset(sigset_t * set)74 static __inline int sigemptyset(sigset_t *set) {
75 if (set == NULL) {
76 errno = EINVAL;
77 return -1;
78 }
79 memset(set, 0, sizeof(sigset_t));
80 return 0;
81 }
82
sigfillset(sigset_t * set)83 static __inline int sigfillset(sigset_t *set) {
84 if (set == NULL) {
85 errno = EINVAL;
86 return -1;
87 }
88 memset(set, ~0, sizeof(sigset_t));
89 return 0;
90 }
91
signal(int s,sighandler_t f)92 static __inline sighandler_t signal(int s, sighandler_t f) {
93 return bsd_signal(s, f);
94 }
95
96 __END_DECLS
97
98 #endif /* _ANDROID_LEGACY_SIGNAL_INLINES_H_ */
99