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