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Diffstat (limited to 'StdLib/Include/sys/fd_set.h')
| -rw-r--r-- | StdLib/Include/sys/fd_set.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/StdLib/Include/sys/fd_set.h b/StdLib/Include/sys/fd_set.h new file mode 100644 index 0000000000..acbfbf0c9a --- /dev/null +++ b/StdLib/Include/sys/fd_set.h @@ -0,0 +1,107 @@ +/* $NetBSD: fd_set.h,v 1.2 2005/12/11 12:25:20 christos Exp $ */
+
+/*-
+ * Copyright (c) 1992, 1993
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * from: @(#)types.h 8.4 (Berkeley) 1/21/94
+ */
+
+#ifndef _SYS_FD_SET_H_
+#define _SYS_FD_SET_H_
+
+#include <sys/EfiCdefs.h>
+#include <machine/int_types.h>
+
+/*
+ * Implementation dependent defines, hidden from user space. X/Open does not
+ * specify them.
+ */
+#define __NBBY 8 /* number of bits in a byte */
+typedef __int32_t __fd_mask;
+
+/* bits per mask */
+#define __NFDBITS ((unsigned int)sizeof(__fd_mask) * __NBBY)
+
+#define __howmany(x, y) (((x) + ((y) - 1)) / (y))
+
+/*
+ * Select uses bit masks of file descriptors in longs. These macros
+ * manipulate such bit fields (the filesystem macros use chars).
+ * FD_SETSIZE may be defined by the user, but the default here should
+ * be enough for most uses.
+ */
+#ifndef FD_SETSIZE
+#define FD_SETSIZE 256
+#endif
+
+typedef struct fd_set {
+ __fd_mask fds_bits[__howmany(FD_SETSIZE, __NFDBITS)];
+} fd_set;
+
+#define FD_SET(n, p) \
+ ((p)->fds_bits[(n)/__NFDBITS] |= (1 << ((n) % __NFDBITS)))
+#define FD_CLR(n, p) \
+ ((p)->fds_bits[(n)/__NFDBITS] &= ~(1 << ((n) % __NFDBITS)))
+#define FD_ISSET(n, p) \
+ ((p)->fds_bits[(n)/__NFDBITS] & (1 << ((n) % __NFDBITS)))
+#if __GNUC_PREREQ__(2, 95)
+#define FD_ZERO(p) (void)__builtin_memset((p), 0, sizeof(*(p)))
+#else
+#define FD_ZERO(p) do { \
+ fd_set *__fds = (p); \
+ unsigned int __i; \
+ for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
+ __fds->fds_bits[__i] = 0; \
+ } while (/* CONSTCOND */ 0)
+#endif /* GCC 2.95 */
+
+/*
+ * Expose our internals if we are not required to hide them.
+ */
+#if defined(_NETBSD_SOURCE)
+
+#define fd_mask __fd_mask
+#define NFDBITS __NFDBITS
+#ifndef howmany
+#define howmany(a, b) __howmany(a, b)
+#endif
+
+#if __GNUC_PREREQ__(2, 95)
+#define FD_COPY(f, t) (void)__builtin_memcpy((t), (f), sizeof(*(f)))
+#else
+#define FD_COPY(f, t) do { \
+ fd_set *__f = (f), *__t = (t); \
+ unsigned int __i; \
+ for (__i = 0; __i < __howmany(FD_SETSIZE, __NFDBITS); __i++) \
+ __t->fds_bits[__i] = __f->fds_bits[__i]; \
+ } while (/* CONSTCOND */ 0)
+#endif /* GCC 2.95 */
+
+#endif /* _NETBSD_SOURCE */
+
+#endif /* _SYS_FD_SET_H_ */
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