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[]; 57extern const char * const sys_signame[]; 58 59static __inline__ int sigismember(sigset_t *set, int signum) 60{ 61 unsigned long *local_set = (unsigned long *)set; 62 signum--; 63 return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1); 64} 65 66 67static __inline__ int sigaddset(sigset_t *set, int signum) 68{ 69 unsigned long *local_set = (unsigned long *)set; 70 signum--; 71 local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT); 72 return 0; 73} 74 75 76static __inline__ int sigdelset(sigset_t *set, int signum) 77{ 78 unsigned long *local_set = (unsigned long *)set; 79 signum--; 80 local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT)); 81 return 0; 82} 83 84 85static __inline__ int sigemptyset(sigset_t *set) 86{ 87 memset(set, 0, sizeof *set); 88 return 0; 89} 90 91static __inline__ int sigfillset(sigset_t *set) 92{ 93 memset(set, ~0, sizeof *set); 94 return 0; 95} 96 97 98/* compatibility types */ 99typedef void (*sig_t)(int); 100typedef sig_t sighandler_t; 101 102/* differentiater between sysv and bsd behaviour 8*/ 103extern __sighandler_t sysv_signal(int, __sighandler_t); 104extern __sighandler_t bsd_signal(int, __sighandler_t); 105 106/* the default is bsd */ 107static __inline__ __sighandler_t signal(int s, __sighandler_t f) 108{ 109 return bsd_signal(s,f); 110} 111 112/* the syscall itself */ 113extern __sighandler_t __signal(int, __sighandler_t, int); 114 115extern int sigprocmask(int, const sigset_t *, sigset_t *); 116extern int sigaction(int, const struct sigaction *, struct sigaction *); 117 118extern int sigpending(sigset_t *); 119extern int sigsuspend(const sigset_t *); 120extern int sigwait(const sigset_t *set, int *sig); 121extern int siginterrupt(int sig, int flag); 122 123extern int raise(int); 124extern int kill(pid_t, int); 125extern int killpg(int pgrp, int sig); 126extern int sigaltstack(const stack_t *ss, stack_t *oss); 127 128 129__END_DECLS 130 131#endif /* _SIGNAL_H_ */ 132