bsd/sys/select.h

   1 /*
   2  * Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28 /*
  29  * Copyright (c) 1992, 1993
  30  *      The Regents of the University of California.  All rights reserved.
  31  *
  32  * Redistribution and use in source and binary forms, with or without
  33  * modification, are permitted provided that the following conditions
  34  * are met:
  35  * 1. Redistributions of source code must retain the above copyright
  36  *    notice, this list of conditions and the following disclaimer.
  37  * 2. Redistributions in binary form must reproduce the above copyright
  38  *    notice, this list of conditions and the following disclaimer in the
  39  *    documentation and/or other materials provided with the distribution.
  40  * 3. All advertising materials mentioning features or use of this software
  41  *    must display the following acknowledgement:
  42  *      This product includes software developed by the University of
  43  *      California, Berkeley and its contributors.
  44  * 4. Neither the name of the University nor the names of its contributors
  45  *    may be used to endorse or promote products derived from this software
  46  *    without specific prior written permission.
  47  *
  48  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  49  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  50  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  51  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  52  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  53  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  54  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  55  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  56  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  57  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  58  * SUCH DAMAGE.
  59  *
  60  *      @(#)select.h    8.2 (Berkeley) 1/4/94
  61  */
  62
  63 #ifndef _SYS_SELECT_H_
  64 #define _SYS_SELECT_H_
  65
  66 #include <sys/appleapiopts.h>
  67 #include <sys/cdefs.h>
  68 #include <sys/_types.h>
  69
  70 /*
  71  * [XSI] The <sys/select.h> header shall define the fd_set type as a structure.
  72  * The timespec structure shall be defined as described in <time.h>
  73  * The <sys/select.h> header shall define the timeval structure.
  74  */
  75 #include <sys/_types/_fd_def.h>
  76 #include <sys/_types/_timespec.h>
  77 #include <sys/_types/_timeval.h>
  78
  79 /*
  80  * The time_t and suseconds_t types shall be defined as described in
  81  * <sys/types.h>
  82  * The sigset_t type shall be defined as described in <signal.h>
  83  */
  84 #include <sys/_types/_time_t.h>
  85 #include <sys/_types/_suseconds_t.h>
  86 #include <sys/_types/_sigset_t.h>
  87
  88 /*
  89  * [XSI] FD_CLR, FD_ISSET, FD_SET, FD_ZERO may be declared as a function, or
  90  *       defined as a macro, or both
  91  * [XSI] FD_SETSIZE shall be defined as a macro
  92  */
  93
  94 /*
  95  * Select uses bit masks of file descriptors in longs.  These macros
  96  * manipulate such bit fields (the filesystem macros use chars).  The
  97  * extra protection here is to permit application redefinition above
  98  * the default size.
  99  */
 100 #include <sys/_types/_fd_setsize.h>
 101 #include <sys/_types/_fd_set.h>
 102 #include <sys/_types/_fd_clr.h>
 103 #include <sys/_types/_fd_isset.h>
 104 #include <sys/_types/_fd_zero.h>
 105
 106 #if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
 107 #include <sys/_types/_fd_copy.h>
 108 #endif  /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
 109
 110 #ifdef KERNEL
 111 #include <sys/kernel_types.h>
 112 #include <kern/waitq.h>
 113 #include <sys/event.h>
 114
 115 /*
 116  * Used to maintain information about processes that wish to be
 117  * notified when I/O becomes possible.
 118  */
 119 #ifdef KERNEL_PRIVATE
 120 struct selinfo {
 121         struct  waitq si_waitq;         /* waitq for wait/wakeup */
 122         struct  klist si_note;          /* JMM - temporary separation */
 123         u_int   si_flags;               /* see below */
 124 };
 125
 126 #define SI_COLL         0x0001          /* collision occurred */
 127 #define SI_RECORDED     0x0004          /* select has been recorded */
 128 #define SI_INITED       0x0008          /* selinfo has been inited */
 129 #define SI_CLEAR        0x0010          /* selinfo has been cleared */
 130
 131 #else
 132 struct selinfo;
 133 #endif
 134
 135 __BEGIN_DECLS
 136
 137 extern int selwait;
 138 void    selrecord(proc_t selector, struct selinfo *, void *);
 139 void    selwakeup(struct selinfo *);
 140 void    selthreadclear(struct selinfo *);
 141
 142 __END_DECLS
 143
 144 #else /* !KERNEL */
 145
 146 __BEGIN_DECLS
 147
 148 #ifndef  __MWERKS__
 149 int      pselect(int, fd_set * __restrict, fd_set * __restrict,
 150                 fd_set * __restrict, const struct timespec * __restrict,
 151                 const sigset_t * __restrict)
 152 #if defined(_DARWIN_C_SOURCE) || defined(_DARWIN_UNLIMITED_SELECT)
 153                 __DARWIN_EXTSN_C(pselect)
 154 #else /* !_DARWIN_C_SOURCE && !_DARWIN_UNLIMITED_SELECT */
 155 #  if defined(__LP64__) && !__DARWIN_NON_CANCELABLE
 156                 __DARWIN_1050(pselect)
 157 #  else /* !__LP64__ || __DARWIN_NON_CANCELABLE */
 158                 __DARWIN_ALIAS_C(pselect)
 159 #  endif /* __LP64__ && !__DARWIN_NON_CANCELABLE */
 160 #endif /* _DARWIN_C_SOURCE || _DARWIN_UNLIMITED_SELECT */
 161                 ;
 162 #endif /* __MWERKS__ */
 163
 164 #include <sys/_select.h>        /* select() prototype */
 165
 166 __END_DECLS
 167
 168 #endif /* ! KERNEL */
 169
 170 #endif /* !_SYS_SELECT_H_ */