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
43 typedef 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
56 extern const char * const sys_siglist[];
57
sigismember(sigset_t * set,int signum)58 static __inline__ int sigismember(sigset_t *set, int signum)
59 {
60 unsigned long *local_set = (unsigned long *)set;
61 signum--;
62 return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1);
63 }
64
65
sigaddset(sigset_t * set,int signum)66 static __inline__ int sigaddset(sigset_t *set, int signum)
67 {
68 unsigned long *local_set = (unsigned long *)set;
69 signum--;
70 local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT);
71 return 0;
72 }
73
74
sigdelset(sigset_t * set,int signum)75 static __inline__ int sigdelset(sigset_t *set, int signum)
76 {
77 unsigned long *local_set = (unsigned long *)set;
78 signum--;
79 local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT));
80 return 0;
81 }
82
83
sigemptyset(sigset_t * set)84 static __inline__ int sigemptyset(sigset_t *set)
85 {
86 memset(set, 0, sizeof *set);
87 return 0;
88 }
89
sigfillset(sigset_t * set)90 static __inline__ int sigfillset(sigset_t *set)
91 {
92 memset(set, ~0, sizeof *set);
93 return 0;
94 }
95
96
97 /* compatibility types */
98 typedef void (*sig_t)(int);
99 typedef sig_t sighandler_t;
100
101 /* differentiater between sysv and bsd behaviour 8*/
102 extern __sighandler_t sysv_signal(int, __sighandler_t);
103 extern __sighandler_t bsd_signal(int, __sighandler_t);
104
105 /* the default is bsd */
signal(int s,__sighandler_t f)106 static __inline__ __sighandler_t signal(int s, __sighandler_t f)
107 {
108 return bsd_signal(s,f);
109 }
110
111 /* the syscall itself */
112 extern __sighandler_t __signal(int, __sighandler_t, int);
113
114 extern int sigprocmask(int, const sigset_t *, sigset_t *);
115 extern int sigaction(int, const struct sigaction *, struct sigaction *);
116
117 extern int sigpending(sigset_t *);
118 extern int sigsuspend(const sigset_t *);
119 extern int sigwait(const sigset_t *set, int *sig);
120 extern int siginterrupt(int sig, int flag);
121
122 extern int raise(int);
123 extern int kill(pid_t, int);
124
125
126 __END_DECLS
127
128 #endif /* _SIGNAL_H_ */
129