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/* crepy NIG / _NSIG handling, just to be safe */
46#ifndef NSIG
47#  define NSIG  _NSIG
48#endif
49#ifndef _NSIG
50#  define _NSIG  NSIG
51#endif
52
53extern const char * const sys_siglist[];
54
55static __inline__ int sigismember(sigset_t *set, int signum)
56{
57    unsigned long *local_set = (unsigned long *)set;
58    signum--;
59    return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1);
60}
61
62
63static __inline__ int sigaddset(sigset_t *set, int signum)
64{
65    unsigned long *local_set = (unsigned long *)set;
66    signum--;
67    local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT);
68    return 0;
69}
70
71
72static __inline__ int sigdelset(sigset_t *set, int signum)
73{
74    unsigned long *local_set = (unsigned long *)set;
75    signum--;
76    local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT));
77    return 0;
78}
79
80
81static __inline__ int sigemptyset(sigset_t *set)
82{
83    memset(set, 0, sizeof *set);
84    return 0;
85}
86
87static __inline__ int sigfillset(sigset_t *set)
88{
89    memset(set, ~0, sizeof *set);
90    return 0;
91}
92
93
94/* compatibility types */
95typedef void  (*sig_t)(int);
96typedef sig_t sighandler_t;
97
98/* differentiater between sysv and bsd behaviour 8*/
99extern __sighandler_t sysv_signal(int, __sighandler_t);
100extern __sighandler_t bsd_signal(int, __sighandler_t);
101
102/* the default is bsd */
103static __inline__ __sighandler_t signal(int s, __sighandler_t f)
104{
105    return bsd_signal(s,f);
106}
107
108/* the syscall itself */
109extern __sighandler_t __signal(int, __sighandler_t, int);
110
111extern int sigprocmask(int, const sigset_t *, sigset_t *);
112extern int sigaction(int, const struct sigaction *, struct sigaction *);
113
114extern int sigpending(sigset_t *);
115extern int sigsuspend(const sigset_t *);
116extern int sigwait(const sigset_t *set, int *sig);
117extern int siginterrupt(int  sig, int  flag);
118
119extern int raise(int);
120extern int kill(pid_t, int);
121
122
123__END_DECLS
124
125#endif /* _SIGNAL_H_ */
126