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 <sys/cdefs.h>
33
34 #if __ANDROID_API__ < __ANDROID_API_L__
35
36 #include <errno.h>
37 #include <signal.h>
38 #include <string.h>
39
40 __BEGIN_DECLS
41
42 sighandler_t bsd_signal(int __signal, sighandler_t __handler) __REMOVED_IN(21);
43
44 /* These weren't introduced until L. */
45 int __libc_current_sigrtmax() __attribute__((__weak__)) __VERSIONER_NO_GUARD;
46 int __libc_current_sigrtmin() __attribute__((__weak__)) __VERSIONER_NO_GUARD;
47
__ndk_legacy___libc_current_sigrtmax()48 static __inline int __ndk_legacy___libc_current_sigrtmax() {
49 if (__libc_current_sigrtmax) return __libc_current_sigrtmax();
50 return __SIGRTMAX; /* Should match __libc_current_sigrtmax. */
51 }
52
__ndk_legacy___libc_current_sigrtmin()53 static __inline int __ndk_legacy___libc_current_sigrtmin() {
54 if (__libc_current_sigrtmin) return __libc_current_sigrtmin();
55 return __SIGRTMIN + 6; /* Should match __libc_current_sigrtmin. */
56 }
57
58 #undef SIGRTMAX
59 #define SIGRTMAX __ndk_legacy___libc_current_sigrtmax()
60 #undef SIGRTMIN
61 #define SIGRTMIN __ndk_legacy___libc_current_sigrtmin()
62
sigismember(const sigset_t * set,int signum)63 static __inline int sigismember(const sigset_t *set, int signum) {
64 /* Signal numbers start at 1, but bit positions start at 0. */
65 int bit = signum - 1;
66 const unsigned long *local_set = (const unsigned long *)set;
67 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
68 errno = EINVAL;
69 return -1;
70 }
71 return (int)((local_set[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1);
72 }
73
sigaddset(sigset_t * set,int signum)74 static __inline int sigaddset(sigset_t *set, int signum) {
75 /* Signal numbers start at 1, but bit positions start at 0. */
76 int bit = signum - 1;
77 unsigned long *local_set = (unsigned long *)set;
78 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
79 errno = EINVAL;
80 return -1;
81 }
82 local_set[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT);
83 return 0;
84 }
85
sigdelset(sigset_t * set,int signum)86 static __inline int sigdelset(sigset_t *set, int signum) {
87 /* Signal numbers start at 1, but bit positions start at 0. */
88 int bit = signum - 1;
89 unsigned long *local_set = (unsigned long *)set;
90 if (set == NULL || bit < 0 || bit >= (int)(8 * sizeof(sigset_t))) {
91 errno = EINVAL;
92 return -1;
93 }
94 local_set[bit / LONG_BIT] &= ~(1UL << (bit % LONG_BIT));
95 return 0;
96 }
97
sigemptyset(sigset_t * set)98 static __inline int sigemptyset(sigset_t *set) {
99 if (set == NULL) {
100 errno = EINVAL;
101 return -1;
102 }
103 memset(set, 0, sizeof(sigset_t));
104 return 0;
105 }
106
sigfillset(sigset_t * set)107 static __inline int sigfillset(sigset_t *set) {
108 if (set == NULL) {
109 errno = EINVAL;
110 return -1;
111 }
112 memset(set, ~0, sizeof(sigset_t));
113 return 0;
114 }
115
signal(int s,sighandler_t f)116 static __inline sighandler_t signal(int s, sighandler_t f) {
117 return bsd_signal(s, f);
118 }
119
120 __END_DECLS
121
122 #endif /* __ANDROID_API__ < __ANDROID_API_L__ */
123
124 #endif /* _ANDROID_LEGACY_SIGNAL_INLINES_H_ */
125