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authorEric Andersen <andersen@codepoet.org>2000-07-06 19:22:49 +0000
committerEric Andersen <andersen@codepoet.org>2000-07-06 19:22:49 +0000
commitffb96c090015f49059d146deefbbd7e1f6baa642 (patch)
tree53229e8793e289f18a7453b144850b6583078c32 /libc/sysdeps/linux/i386/bits/select.h
parentafb85e9d6ca1de8f1ecb267e8c30b88ba4382820 (diff)
Some more major updates to further superate ucLibc from the kernel
headers (the way it has been done in GNU libc). -Erik
Diffstat (limited to 'libc/sysdeps/linux/i386/bits/select.h')
-rw-r--r--libc/sysdeps/linux/i386/bits/select.h72
1 files changed, 72 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/i386/bits/select.h b/libc/sysdeps/linux/i386/bits/select.h
new file mode 100644
index 000000000..6acfc5b9a
--- /dev/null
+++ b/libc/sysdeps/linux/i386/bits/select.h
@@ -0,0 +1,72 @@
+/* Copyright (C) 1997, 1998, 1999 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" \
+ : "=c" (__d0), "=D" (__d1) \
+ : "a" (0), "0" (sizeof (__fd_set) \
+ / sizeof (__fd_mask)), \
+ "1" (&__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 */