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
44 typedef 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
57 extern const char * const sys_siglist[];
58 extern const char * const sys_signame[];
59
sigismember(sigset_t * set,int signum)60 static __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
sigaddset(sigset_t * set,int signum)68 static __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
sigdelset(sigset_t * set,int signum)77 static __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
sigemptyset(sigset_t * set)86 static __inline__ int sigemptyset(sigset_t *set)
87 {
88 memset(set, 0, sizeof *set);
89 return 0;
90 }
91
sigfillset(sigset_t * set)92 static __inline__ int sigfillset(sigset_t *set)
93 {
94 memset(set, ~0, sizeof *set);
95 return 0;
96 }
97
98
99 /* compatibility types */
100 typedef void (*sig_t)(int);
101 typedef sig_t sighandler_t;
102
103 /* differentiater between sysv and bsd behaviour 8*/
104 extern __sighandler_t sysv_signal(int, __sighandler_t);
105 extern __sighandler_t bsd_signal(int, __sighandler_t);
106
107 /* the default is bsd */
signal(int s,__sighandler_t f)108 static __inline__ __sighandler_t signal(int s, __sighandler_t f)
109 {
110 return bsd_signal(s,f);
111 }
112
113 /* the syscall itself */
114 extern __sighandler_t __signal(int, __sighandler_t, int);
115
116 extern int sigprocmask(int, const sigset_t *, sigset_t *);
117 extern int sigaction(int, const struct sigaction *, struct sigaction *);
118
119 extern int sigpending(sigset_t *);
120 extern int sigsuspend(const sigset_t *);
121 extern int sigwait(const sigset_t *set, int *sig);
122 extern int siginterrupt(int sig, int flag);
123
124 extern int raise(int);
125 extern int kill(pid_t, int);
126 extern int killpg(int pgrp, int sig);
127 extern int sigaltstack(const stack_t *ss, stack_t *oss);
128
129
130 __END_DECLS
131
132 #endif /* _SIGNAL_H_ */
133