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 /* obsolete */ 127 #define SI_RECORDED 0x0004 /* obsolete */ 128 #define SI_INITED 0x0008 /* obsolete */ 129 #define SI_CLEAR 0x0010 /* obsolete */ 130 #define SI_KNPOSTING 0x0020 /* posting to knotes */ 131 #define SI_SELSPEC 0x0040 /* has spec_filtops knote hooked */ 132 133 #else 134 struct selinfo; 135 #endif 136 137 __BEGIN_DECLS 138 139 extern int selwait; 140 141 /* 142 * Now these are the laws of VNOP_SELECT, as old and as true as the sky, 143 * And the device that shall keep it may prosper, but the device that shall 144 * break it must receive ENODEV: 145 * 146 * 1. Take a lock to protect against other selects on the same vnode. 147 * 2. Return 1 if data is ready to be read. 148 * 3. Return 0 and call `selrecord` on a handy `selinfo` structure if there 149 * is no data. 150 * 4. Call `selwakeup` when the vnode has an active `selrecord` and data 151 * can be read or written (depending on the seltype). 152 * 5. If there's a `selrecord` and no corresponding `selwakeup`, but the 153 * vnode is going away, call `selthreadclear`. 154 */ 155 void selrecord(proc_t selector, struct selinfo *, void *); 156 void selwakeup(struct selinfo *); 157 void selthreadclear(struct selinfo *); 158 159 #if XNU_KERNEL_PRIVATE 160 struct knote; 161 struct _select; 162 void select_cleanup_uthread(struct _select *); 163 164 #define SELSPEC_RECORD_MARKER ((struct select_set *)-1) 165 typedef void (^selspec_record_hook_t)(struct selinfo *sip); 166 void selspec_attach(struct knote *, struct selinfo *); 167 void selspec_detach(struct knote *); 168 #endif 169 170 __END_DECLS 171 172 #else /* !KERNEL */ 173 174 __BEGIN_DECLS 175 176 #ifndef __MWERKS__ 177 int pselect(int, fd_set * __restrict, fd_set * __restrict, 178 fd_set * __restrict, const struct timespec * __restrict, 179 const sigset_t * __restrict) 180 #if defined(_DARWIN_C_SOURCE) || defined(_DARWIN_UNLIMITED_SELECT) 181 __DARWIN_EXTSN_C(pselect) 182 #else /* !_DARWIN_C_SOURCE && !_DARWIN_UNLIMITED_SELECT */ 183 # if defined(__LP64__) && !__DARWIN_NON_CANCELABLE 184 __DARWIN_1050(pselect) 185 # else /* !__LP64__ || __DARWIN_NON_CANCELABLE */ 186 __DARWIN_ALIAS_C(pselect) 187 # endif /* __LP64__ && !__DARWIN_NON_CANCELABLE */ 188 #endif /* _DARWIN_C_SOURCE || _DARWIN_UNLIMITED_SELECT */ 189 ; 190 #endif /* __MWERKS__ */ 191 192 __END_DECLS 193 194 #include <sys/_select.h> /* select() prototype */ 195 196 #endif /* ! KERNEL */ 197 198 #endif /* !_SYS_SELECT_H_ */ 199