newlib-cygwin/newlib/libc/sys/linux/signal.c

/* libc/sys/linux/signal.c - Signal handling functions */

/* Written 2000 by Werner Almesberger */


#include <signal.h>
#include <unistd.h>
#include <sys/types.h>
#include <machine/syscall.h>

/* avoid name space pollution */
#define __NR___sgetmask __NR_sgetmask
#define __NR___ssetmask __NR_ssetmask
#define __NR___sigsuspend __NR_sigsuspend
#define __NR___rt_sigtimedwait __NR_rt_sigtimedwait

_syscall2(int,kill,pid_t,pid,int,sig)
_syscall2(__sighandler_t,signal,int,signum,__sighandler_t,handler)
_syscall3(int,sigaction,int,signum,const struct sigaction *,act,
  struct sigaction *,oldact)
_syscall1(int,sigpending,sigset_t *,set)
_syscall0(int,pause)
_syscall1(unsigned int,alarm,unsigned int,seconds)
_syscall3(int,sigprocmask,int,how,const sigset_t *,set,sigset_t *,oldset)

static _syscall0(int,__sgetmask)
static _syscall1(int,__ssetmask,int,newmask)
static _syscall3(int,__sigsuspend,int,arg1,int,arg2,int,mask)
static _syscall4(int,__rt_sigtimedwait,const sigset_t *,set,siginfo_t *,info,struct timespec *,timeout,size_t,size)

int sigsuspend (const sigset_t *mask)
{
    return __sigsuspend(0,0,((__sigset_t *)mask)->__val[0]);
}

int sigsetmask(int newmask) /* BSD */
{
    return __ssetmask(newmask);
}


int sigmask(int signum) /* BSD */
{
    return 1 << signum;
}


int sigblock(int mask) /* BSD */
{
    return __ssetmask(mask | __sgetmask());
}

int __libc_raise(int sig)
{
    return kill(getpid(),sig);
}
weak_alias(__libc_raise,raise)

int sigtimedwait(const sigset_t *set, siginfo_t *info,
                 struct timespec *timeout)
{
  return __rt_sigtimedwait(set, info, timeout, sizeof(sigset_t));
}

int sigwaitinfo(const sigset_t *set, siginfo_t *info)
{
  return __rt_sigtimedwait(set, info, NULL, sizeof(sigset_t));
}

const char *const sys_siglist[] = {
#include "siglist.inc"
};