signal.h revision db4990373232182a897e10663344c429f5d1b2d5 
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
29#ifndef _SIGNAL_H_
30#define _SIGNAL_H_
31
32#include <asm/sigcontext.h>
33#include <errno.h>
34#include <limits.h>
35#include <machine/pthread_types.h>
36#include <machine/timespec.h>
37#include <string.h>
38#include <sys/cdefs.h>
39#include <sys/types.h>
40
41#if defined(__LP64__) || defined(__mips__)
42/* For 64-bit (and mips), the kernel's struct sigaction doesn't match the POSIX one,
43 * so we need to expose our own and translate behind the scenes. */
44#  define sigaction __kernel_sigaction
45#  include <linux/signal.h>
46#  undef sigaction
47#else
48/* For 32-bit, we're stuck with the definitions we already shipped,
49 * even though they contain a sigset_t that's too small. */
50#  include <linux/signal.h>
51#endif
52
53#include <sys/ucontext.h>
54#define __BIONIC_HAVE_UCONTEXT_T
55
56__BEGIN_DECLS
57
58typedef int sig_atomic_t;
59
60/* The arm and x86 kernel header files don't define _NSIG. */
61#ifndef _KERNEL__NSIG
62#define _KERNEL__NSIG 64
63#endif
64
65/* Userspace's NSIG is the kernel's _NSIG + 1. */
66#define _NSIG (_KERNEL__NSIG + 1)
67#define NSIG _NSIG
68
69/* We take a few real-time signals for ourselves. May as well use the same names as glibc. */
70#define SIGRTMIN (__libc_current_sigrtmin())
71#define SIGRTMAX (__libc_current_sigrtmax())
72extern int __libc_current_sigrtmin(void);
73extern int __libc_current_sigrtmax(void);
74
75extern const char* const sys_siglist[];
76extern const char* const sys_signame[]; /* BSD compatibility. */
77
78typedef __sighandler_t sig_t; /* BSD compatibility. */
79typedef __sighandler_t sighandler_t; /* glibc compatibility. */
80
81#define si_timerid si_tid /* glibc compatibility. */
82
83#if defined(__LP64__)
84
85struct sigaction {
86  unsigned int sa_flags;
87  union {
88    sighandler_t sa_handler;
89    void (*sa_sigaction)(int, struct siginfo*, void*);
90  };
91  sigset_t sa_mask;
92  void (*sa_restorer)(void);
93};
94
95#elif defined(__mips__)
96
97struct sigaction {
98  unsigned int sa_flags;
99  union {
100    sighandler_t sa_handler;
101    void (*sa_sigaction) (int, struct siginfo*, void*);
102  };
103  sigset_t sa_mask;
104};
105
106#endif
107
108extern int sigaction(int, const struct sigaction*, struct sigaction*);
109
110extern sighandler_t signal(int, sighandler_t);
111
112extern int siginterrupt(int, int);
113
114extern int sigaddset(sigset_t*, int);
115extern int sigdelset(sigset_t*, int);
116extern int sigemptyset(sigset_t*);
117extern int sigfillset(sigset_t*);
118extern int sigismember(const sigset_t*, int);
119
120extern int sigpending(sigset_t*) __nonnull((1));
121extern int sigprocmask(int, const sigset_t*, sigset_t*);
122extern int sigsuspend(const sigset_t*) __nonnull((1));
123extern int sigwait(const sigset_t*, int*) __nonnull((1, 2));
124
125extern int raise(int);
126extern int kill(pid_t, int);
127extern int killpg(int, int);
128
129extern int sigaltstack(const stack_t*, stack_t*);
130
131extern void psiginfo(const siginfo_t*, const char*);
132extern void psignal(int, const char*);
133
134extern int pthread_kill(pthread_t, int);
135extern int pthread_sigmask(int, const sigset_t*, sigset_t*);
136
137extern int sigqueue(pid_t, int, const union sigval);
138extern int sigtimedwait(const sigset_t*, siginfo_t*, const struct timespec*);
139extern int sigwaitinfo(const sigset_t*, siginfo_t*);
140
141__END_DECLS
142
143#endif /* _SIGNAL_H_ */
144