1 /* 2 * Copyright (C) 2008 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 #ifndef _SIGNAL_H_ 29 #define _SIGNAL_H_ 30 31 #include <sys/cdefs.h> 32 #include <limits.h> /* For LONG_BIT */ 33 #include <string.h> /* For memset() */ 34 #include <sys/types.h> 35 #include <asm/signal.h> 36 37 #define __ARCH_SI_UID_T __kernel_uid32_t 38 #include <asm/siginfo.h> 39 #undef __ARCH_SI_UID_T 40 41 __BEGIN_DECLS 42 43 typedef int sig_atomic_t; 44 45 /* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however 46 * its definition is part of a #if __KERNEL__ .. #endif block in the original 47 * kernel headers and is thus not part of our cleaned-up versions. 48 * 49 * Looking at the current kernel sources, it is defined as 64 for all 50 * architectures except for the 'mips' one which set it to 128. 51 */ 52 #ifndef _NSIG 53 # define _NSIG 64 54 #endif 55 56 extern const char * const sys_siglist[]; 57 58 static __inline__ int sigismember(sigset_t *set, int signum) 59 { 60 unsigned long *local_set = (unsigned long *)set; 61 signum--; 62 return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1); 63 } 64 65 66 static __inline__ int sigaddset(sigset_t *set, int signum) 67 { 68 unsigned long *local_set = (unsigned long *)set; 69 signum--; 70 local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT); 71 return 0; 72 } 73 74 75 static __inline__ int sigdelset(sigset_t *set, int signum) 76 { 77 unsigned long *local_set = (unsigned long *)set; 78 signum--; 79 local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT)); 80 return 0; 81 } 82 83 84 static __inline__ int sigemptyset(sigset_t *set) 85 { 86 memset(set, 0, sizeof *set); 87 return 0; 88 } 89 90 static __inline__ int sigfillset(sigset_t *set) 91 { 92 memset(set, ~0, sizeof *set); 93 return 0; 94 } 95 96 97 /* compatibility types */ 98 typedef void (*sig_t)(int); 99 typedef sig_t sighandler_t; 100 101 /* differentiater between sysv and bsd behaviour 8*/ 102 extern __sighandler_t sysv_signal(int, __sighandler_t); 103 extern __sighandler_t bsd_signal(int, __sighandler_t); 104 105 /* the default is bsd */ 106 static __inline__ __sighandler_t signal(int s, __sighandler_t f) 107 { 108 return bsd_signal(s,f); 109 } 110 111 /* the syscall itself */ 112 extern __sighandler_t __signal(int, __sighandler_t, int); 113 114 extern int sigprocmask(int, const sigset_t *, sigset_t *); 115 extern int sigaction(int, const struct sigaction *, struct sigaction *); 116 117 extern int sigpending(sigset_t *); 118 extern int sigsuspend(const sigset_t *); 119 extern int sigwait(const sigset_t *set, int *sig); 120 extern int siginterrupt(int sig, int flag); 121 122 extern int raise(int); 123 extern int kill(pid_t, int); 124 125 126 __END_DECLS 127 128 #endif /* _SIGNAL_H_ */ 129
