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 43typedef 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 56extern const char * const sys_siglist[]; 57 58static __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 66static __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 75static __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 84static __inline__ int sigemptyset(sigset_t *set) 85{ 86 memset(set, 0, sizeof *set); 87 return 0; 88} 89 90static __inline__ int sigfillset(sigset_t *set) 91{ 92 memset(set, ~0, sizeof *set); 93 return 0; 94} 95 96 97/* compatibility types */ 98typedef void (*sig_t)(int); 99typedef sig_t sighandler_t; 100 101/* differentiater between sysv and bsd behaviour 8*/ 102extern __sighandler_t sysv_signal(int, __sighandler_t); 103extern __sighandler_t bsd_signal(int, __sighandler_t); 104 105/* the default is bsd */ 106static __inline__ __sighandler_t signal(int s, __sighandler_t f) 107{ 108 return bsd_signal(s,f); 109} 110 111/* the syscall itself */ 112extern __sighandler_t __signal(int, __sighandler_t, int); 113 114extern int sigprocmask(int, const sigset_t *, sigset_t *); 115extern int sigaction(int, const struct sigaction *, struct sigaction *); 116 117extern int sigpending(sigset_t *); 118extern int sigsuspend(const sigset_t *); 119extern int sigwait(const sigset_t *set, int *sig); 120extern int siginterrupt(int sig, int flag); 121 122extern int raise(int); 123extern int kill(pid_t, int); 124 125 126__END_DECLS 127 128#endif /* _SIGNAL_H_ */ 129