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/*
* Copyright (C) 2008 The Android Open Source Project
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef _SIGNAL_H_
#define _SIGNAL_H_
#include <errno.h>
#include <sys/cdefs.h>
#include <limits.h> /* For LONG_BIT */
#include <string.h> /* For memset() */
#include <sys/types.h>
#include <asm/signal.h>
#define __ARCH_SI_UID_T __kernel_uid32_t
#include <asm/siginfo.h>
#undef __ARCH_SI_UID_T
__BEGIN_DECLS
typedef int sig_atomic_t;
/* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however
* its definition is part of a #if __KERNEL__ .. #endif block in the original
* kernel headers and is thus not part of our cleaned-up versions.
*
* Looking at the current kernel sources, it is defined as 64 for all
* architectures except for the 'mips' one which set it to 128.
*/
#ifndef _NSIG
# define _NSIG 64
#endif
extern const char* const sys_siglist[];
extern const char* const sys_signame[];
static __inline__ int sigismember(const sigset_t* set, int signum) {
int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0.
const unsigned long* local_set = (const unsigned long*) set;
if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
return (int) ((local_set[bit / LONG_BIT] >> (bit % LONG_BIT)) & 1);
}
static __inline__ int sigaddset(sigset_t* set, int signum) {
int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0.
unsigned long* local_set = (unsigned long*) set;
if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
local_set[bit / LONG_BIT] |= 1UL << (bit % LONG_BIT);
return 0;
}
static __inline__ int sigdelset(sigset_t* set, int signum) {
int bit = signum - 1; // Signal numbers start at 1, but bit positions start at 0.
unsigned long* local_set = (unsigned long*) set;
if (set == NULL || bit < 0 || bit >= (int) (8*sizeof(sigset_t))) {
errno = EINVAL;
return -1;
}
local_set[bit / LONG_BIT] &= ~(1UL << (bit % LONG_BIT));
return 0;
}
static __inline__ int sigemptyset(sigset_t* set) {
if (set == NULL) {
errno = EINVAL;
return -1;
}
memset(set, 0, sizeof *set);
return 0;
}
static __inline__ int sigfillset(sigset_t* set) {
if (set == NULL) {
errno = EINVAL;
return -1;
}
memset(set, ~0, sizeof *set);
return 0;
}
/* compatibility types */
typedef void (*sig_t)(int);
typedef sig_t sighandler_t;
/* differentiater between sysv and bsd behaviour 8*/
extern __sighandler_t sysv_signal(int, __sighandler_t);
extern __sighandler_t bsd_signal(int, __sighandler_t);
/* the default is bsd */
static __inline__ __sighandler_t signal(int s, __sighandler_t f)
{
return bsd_signal(s,f);
}
/* the syscall itself */
extern __sighandler_t __signal(int, __sighandler_t, int);
extern int sigprocmask(int, const sigset_t *, sigset_t *);
extern int sigaction(int, const struct sigaction *, struct sigaction *);
extern int sigpending(sigset_t *);
extern int sigsuspend(const sigset_t *);
extern int sigwait(const sigset_t *set, int *sig);
extern int siginterrupt(int sig, int flag);
extern int raise(int);
extern int kill(pid_t, int);
extern int killpg(int pgrp, int sig);
extern int sigaltstack(const stack_t *ss, stack_t *oss);
extern void psiginfo(const siginfo_t* si, const char* message);
extern void psignal(int signal_number, const char* message);
__END_DECLS
#endif /* _SIGNAL_H_ */
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