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#include <asm/sigcontext.h>
37
38#define __ARCH_SI_UID_T __kernel_uid32_t
39#include <asm/siginfo.h>
40#undef __ARCH_SI_UID_T
41
42__BEGIN_DECLS
43
44typedef int sig_atomic_t;
45
46/* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however
47 * its definition is part of a #if __KERNEL__ .. #endif block in the original
48 * kernel headers and is thus not part of our cleaned-up versions.
49 *
50 * Looking at the current kernel sources, it is defined as 64 for all
51 * architectures except for the 'mips' one which set it to 128.
52 */
53#ifndef _NSIG
54#  define _NSIG  64
55#endif
56
57extern const char * const sys_siglist[];
58extern const char * const sys_signame[];
59
60static __inline__ int sigismember(sigset_t *set, int signum)
61{
62    unsigned long *local_set = (unsigned long *)set;
63    signum--;
64    return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1);
65}
66
67
68static __inline__ int sigaddset(sigset_t *set, int signum)
69{
70    unsigned long *local_set = (unsigned long *)set;
71    signum--;
72    local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT);
73    return 0;
74}
75
76
77static __inline__ int sigdelset(sigset_t *set, int signum)
78{
79    unsigned long *local_set = (unsigned long *)set;
80    signum--;
81    local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT));
82    return 0;
83}
84
85
86static __inline__ int sigemptyset(sigset_t *set)
87{
88    memset(set, 0, sizeof *set);
89    return 0;
90}
91
92static __inline__ int sigfillset(sigset_t *set)
93{
94    memset(set, ~0, sizeof *set);
95    return 0;
96}
97
98
99/* compatibility types */
100typedef void  (*sig_t)(int);
101typedef sig_t sighandler_t;
102
103/* differentiater between sysv and bsd behaviour 8*/
104extern __sighandler_t sysv_signal(int, __sighandler_t);
105extern __sighandler_t bsd_signal(int, __sighandler_t);
106
107/* the default is bsd */
108static __inline__ __sighandler_t signal(int s, __sighandler_t f)
109{
110    return bsd_signal(s,f);
111}
112
113/* the syscall itself */
114extern __sighandler_t __signal(int, __sighandler_t, int);
115
116extern int sigprocmask(int, const sigset_t *, sigset_t *);
117extern int sigaction(int, const struct sigaction *, struct sigaction *);
118
119extern int sigpending(sigset_t *);
120extern int sigsuspend(const sigset_t *);
121extern int sigwait(const sigset_t *set, int *sig);
122extern int siginterrupt(int  sig, int  flag);
123
124extern int raise(int);
125extern int kill(pid_t, int);
126extern int killpg(int pgrp, int sig);
127extern int sigaltstack(const stack_t *ss, stack_t *oss);
128
129
130__END_DECLS
131
132#endif /* _SIGNAL_H_ */
133