glibc/sysdeps/i386/bits/select.h
Ulrich Drepper 6e2cc2c147 Update.
1998-10-27  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de> 
 
	* string/bits/string2.h: __USE_GNU already implies __USE_MISC. 
 
1998-10-27  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de> 

	* sysdeps/generic/bits/types.h (__FDS_BITS): New macro to access 
	fds_bits member. 
	* sysdeps/unix/sysv/linux/alpha/bits/types.h (__FDS_BITS): Likewise. 
	* sysdeps/unix/sysv/linux/bits/types.h (__FDS_BITS): Likewise. 
	* sysdeps/unix/sysv/linux/mips/bits/types.h (__FDS_BITS): Likewise. 
	* sysdeps/unix/sysv/linux/sparc/sparc64/bits/types.h (__FDS_BITS): 
	Likewise. 
	* sysdeps/unix/sysv/sysv4/solaris2/bits/types.h (__FDS_BITS): 
	Likewise. 
	* sysdeps/generic/bits/select.h (__FD_ZERO, __FD_SET, __FD_CLR, 
	__FD_ISSET): Use it. 
	* sysdeps/i386/bits/select.h (__FD_ZERO, __FD_SET, __FD_CLR, 
	__FD_ISSET): Likewise.
1998-10-28 14:41:59 +00:00

74 lines
2.8 KiB
C

/* Copyright (C) 1997, 1998 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 Library General Public License as
published by the Free Software Foundation; either version 2 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#ifndef _SYS_SELECT_H
# error "Never use <bits/select.h> directly; include <sys/select.h> instead."
#endif
#if defined __GNUC__ && __GNUC__ >= 2
# define __FD_ZERO(fdsp) \
do { \
int __d0, __d1; \
__asm__ __volatile__ ("cld; rep; stosl" \
: "=m" (__FDS_BITS (fdsp)[__FDELT (__FD_SETSIZE)]), \
"=&c" (__d0), "=&D" (__d1) \
: "a" (0), "1" (sizeof (__fd_set) \
/ sizeof (__fd_mask)), \
"2" (&__FDS_BITS (fdsp)[0]) \
: "memory"); \
} while (0)
# define __FD_SET(fd, fdsp) \
__asm__ __volatile__ ("btsl %1,%0" \
: "=m" (__FDS_BITS (fdsp)[__FDELT (fd)]) \
: "r" (((int) (fd)) % __NFDBITS) \
: "cc","memory")
# define __FD_CLR(fd, fdsp) \
__asm__ __volatile__ ("btrl %1,%0" \
: "=m" (__FDS_BITS (fdsp)[__FDELT (fd)]) \
: "r" (((int) (fd)) % __NFDBITS) \
: "cc","memory")
# define __FD_ISSET(fd, fdsp) \
(__extension__ \
({register char __result; \
__asm__ __volatile__ ("btl %1,%2 ; setcb %b0" \
: "=q" (__result) \
: "r" (((int) (fd)) % __NFDBITS), \
"m" (__FDS_BITS (fdsp)[__FDELT (fd)]) \
: "cc"); \
__result; }))
#else /* ! GNU CC */
/* We don't use `memset' because this would require a prototype and
the array isn't too big. */
# define __FD_ZERO(set) \
do { \
unsigned int __i; \
__fd_set *__arr = (set); \
for (__i = 0; __i < sizeof (__fd_set) / sizeof (__fd_mask); ++__i) \
__FDS_BITS (__arr)[__i] = 0; \
} while (0)
# define __FD_SET(d, set) (__FDS_BITS (set)[__FDELT (d)] |= __FDMASK (d))
# define __FD_CLR(d, set) (__FDS_BITS (set)[__FDELT (d)] &= ~__FDMASK (d))
# define __FD_ISSET(d, set) (__FDS_BITS (set)[__FDELT (d)] & __FDMASK (d))
#endif /* GNU CC */