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
128extern void psiginfo(const siginfo_t* si, const char* message);
129extern void psignal(int signal_number, const char* message);
130
131__END_DECLS
132
133#endif /* _SIGNAL_H_ */
134