ndk/platforms/android-16/arch-arm/usr/include/signal.h

   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 #include <sys/ucontext.h>
  43 #define __BIONIC_HAVE_UCONTEXT_T
  44
  45 __BEGIN_DECLS
  46
  47 typedef int sig_atomic_t;
  48
  49 /* _NSIG is used by the SIGRTMAX definition under <asm/signal.h>, however
  50  * its definition is part of a #if __KERNEL__ .. #endif block in the original
  51  * kernel headers and is thus not part of our cleaned-up versions.
  52  *
  53  * Looking at the current kernel sources, it is defined as 64 for all
  54  * architectures except for the 'mips' one which set it to 128.
  55  */
  56 #ifndef _NSIG
  57 #  define _NSIG  64
  58 #endif
  59
  60 extern const char * const sys_siglist[];
  61 extern const char * const sys_signame[];
  62
  63 static __inline__ int sigismember(sigset_t *set, int signum)
  64 {
  65     unsigned long *local_set = (unsigned long *)set;
  66     signum--;
  67     return (int)((local_set[signum/LONG_BIT] >> (signum%LONG_BIT)) & 1);
  68 }
  69
  70
  71 static __inline__ int sigaddset(sigset_t *set, int signum)
  72 {
  73     unsigned long *local_set = (unsigned long *)set;
  74     signum--;
  75     local_set[signum/LONG_BIT] |= 1UL << (signum%LONG_BIT);
  76     return 0;
  77 }
  78
  79
  80 static __inline__ int sigdelset(sigset_t *set, int signum)
  81 {
  82     unsigned long *local_set = (unsigned long *)set;
  83     signum--;
  84     local_set[signum/LONG_BIT] &= ~(1UL << (signum%LONG_BIT));
  85     return 0;
  86 }
  87
  88
  89 static __inline__ int sigemptyset(sigset_t *set)
  90 {
  91     memset(set, 0, sizeof *set);
  92     return 0;
  93 }
  94
  95 static __inline__ int sigfillset(sigset_t *set)
  96 {
  97     memset(set, ~0, sizeof *set);
  98     return 0;
  99 }
 100
 101
 102 /* compatibility types */
 103 typedef void  (*sig_t)(int);
 104 typedef sig_t sighandler_t;
 105
 106 /* differentiater between sysv and bsd behaviour 8*/
 107 extern __sighandler_t sysv_signal(int, __sighandler_t);
 108 extern __sighandler_t bsd_signal(int, __sighandler_t);
 109
 110 /* the default is bsd */
 111 static __inline__ __sighandler_t signal(int s, __sighandler_t f)
 112 {
 113     return bsd_signal(s,f);
 114 }
 115
 116 /* the syscall itself */
 117 extern __sighandler_t __signal(int, __sighandler_t, int);
 118
 119 extern int sigprocmask(int, const sigset_t *, sigset_t *);
 120 extern int sigaction(int, const struct sigaction *, struct sigaction *);
 121
 122 extern int sigpending(sigset_t *);
 123 extern int sigsuspend(const sigset_t *);
 124 extern int sigwait(const sigset_t *set, int *sig);
 125 extern int siginterrupt(int  sig, int  flag);
 126
 127 extern int raise(int);
 128 extern int kill(pid_t, int);
 129 extern int killpg(int pgrp, int sig);
 130 extern int sigaltstack(const stack_t *ss, stack_t *oss);
 131
 132
 133 __END_DECLS
 134
 135 #endif /* _SIGNAL_H_ */