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glibc/sysdeps/posix/pause.c
Roland McGrath b894c2ea7e * sysdeps/unix/sysv/linux/ia64/sigsuspend.c: File removed.
* sysdeps/unix/sysv/linux/x86_64/sigsuspend.c: File removed.
	* sysdeps/unix/sysv/linux/s390/s390-64/sigsuspend.c: File removed.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sigsuspend.c: File removed.

	* sysdeps/unix/sysv/linux/not-cancel.h (pause_not_cancel): New macro.
	(nanosleep_not_cancel): New macro.
	(sigsuspend_not_cancel): new macro.
	* sysdeps/unix/sysv/linux/sigsuspend.c [__ASSUME_REALTIME_SIGNALS]
	(do_sigsuspend): Define as inline.
	(__sigsuspend): Always use do_sigsuspend.
	[! NO_CANCELLATION] (__sigsuspend_nocancel): New function.
	* include/signal.h: Declare __sigsuspend_nocancel.
	* sysdeps/posix/pause.c
	[! NO_CANCELLATION] (__pause_nocancel): New function.

	* include/unistd.h (__pause_nocancel): Add attribute_hidden.
	* include/time.h (__nanosleep_nocancel): Likewise.
2006-07-31 05:58:51 +00:00

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C

/* pause -- suspend the process until a signal arrives. POSIX.1 version.
Copyright (C) 2003, 2006 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#include <signal.h>
#include <unistd.h>
#include <sysdep-cancel.h>
/* Suspend the process until a signal arrives.
This always returns -1 and sets errno to EINTR. */
int
__libc_pause (void)
{
sigset_t set;
__sigemptyset (&set);
__sigprocmask (SIG_BLOCK, NULL, &set);
/* pause is a cancellation point, but so is sigsuspend.
So no need for anything special here. */
return __sigsuspend (&set);
}
weak_alias (__libc_pause, pause)
LIBC_CANCEL_HANDLED (); /* sigsuspend handles our cancellation. */
#ifndef NO_CANCELLATION
# include <not-cancel.h>
int
__pause_nocancel (void)
{
sigset_t set;
__sigemptyset (&set);
__sigprocmask (SIG_BLOCK, NULL, &set);
return sigsuspend_not_cancel (&set);
}
#endif