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/*
* pause() for uClibc
*
* Copyright (C) 2000-2006 Erik Andersen <andersen@uclibc.org>
*
* Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
*/
#include <sys/syscall.h>
#include <unistd.h>
#include <cancel.h>
#ifdef __NR_pause
/* even if it is not obvious, glibc uses the pause syscall, see syscalls.list */
# define __NR___pause_nocancel __NR_pause
static _syscall0(int, __NC(pause))
CANCELLABLE_SYSCALL(int, pause, (void), ())
#else
# define __need_NULL
# include <stddef.h>
# include <signal.h>
int
# ifdef __UCLIBC_HAS_LINUXTHREADS__
weak_function
# endif
__NC(pause)(void)
{
sigset_t set;
/*__sigemptyset (&set); - why? */
sigprocmask (SIG_BLOCK, NULL, &set);
/* pause is a cancellation point, but so is sigsuspend.
So no need for anything special here. */
return sigsuspend(&set);
}
CANCELLABLE_SYSCALL(int, pause, (void), ())
LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
#endif
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