uclibc-ng/libc/sysdeps/linux/common/sigprocmask.c

/* vi: set sw=4 ts=4: */
/*
 * sigprocmask() 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>

#if defined __USE_POSIX
#include <signal.h>

#undef sigprocmask

libc_hidden_proto(sigprocmask)

#ifdef __NR_rt_sigprocmask

# define __NR___rt_sigprocmask __NR_rt_sigprocmask
static inline
_syscall4(int, __rt_sigprocmask, int, how, const sigset_t *, set,
		  sigset_t *, oldset, size_t, size);

int sigprocmask(int how, const sigset_t * set, sigset_t * oldset)
{
	if (set &&
# if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2)
		(((unsigned int) how) > 2)
#elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
		(((unsigned int)(how-1)) > 2)
# else
#  warning "compile time assumption violated.. slow path..."
		((how != SIG_BLOCK) && (how != SIG_UNBLOCK)
		 && (how != SIG_SETMASK))
# endif
		) {
		__set_errno(EINVAL);
		return -1;
	}
	return __rt_sigprocmask(how, set, oldset, _NSIG / 8);
}


#else

# define __NR___syscall_sigprocmask __NR_sigprocmask
static inline
_syscall3(int, __syscall_sigprocmask, int, how, const sigset_t *, set,
		  sigset_t *, oldset);

int sigprocmask(int how, const sigset_t * set, sigset_t * oldset)
{
	if (set &&
# if (SIG_BLOCK == 0) && (SIG_UNBLOCK == 1) && (SIG_SETMASK == 2)
		(((unsigned int) how) > 2)
#elif (SIG_BLOCK == 1) && (SIG_UNBLOCK == 2) && (SIG_SETMASK == 3)
		(((unsigned int)(how-1)) > 2)
# else
#  warning "compile time assumption violated.. slow path..."
		((how != SIG_BLOCK) && (how != SIG_UNBLOCK)
		 && (how != SIG_SETMASK))
# endif
		) {
		__set_errno(EINVAL);
		return -1;
	}
	return (__syscall_sigprocmask(how, set, oldset));
}
#endif
libc_hidden_def(sigprocmask)
#endif