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 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 53 static __inline int __ndk_legacy___libc_current_sigrtmin() { 54 if (__libc_current_sigrtmin) return __libc_current_sigrtmin(); 55 return __SIGRTMIN + 4; /* 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 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 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 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 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 } 106 107 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 } 115 116 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
