204 lines
7.5 KiB
C
204 lines
7.5 KiB
C
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/*
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* Copyright (c) 2000-2005 Apple Computer, Inc. All rights reserved.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
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*
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* This file contains Original Code and/or Modifications of Original Code
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* as defined in and that are subject to the Apple Public Source License
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* Version 2.0 (the 'License'). You may not use this file except in
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* compliance with the License. The rights granted to you under the License
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* may not be used to create, or enable the creation or redistribution of,
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* unlawful or unlicensed copies of an Apple operating system, or to
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* circumvent, violate, or enable the circumvention or violation of, any
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* terms of an Apple operating system software license agreement.
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*
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* Please obtain a copy of the License at
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* http://www.opensource.apple.com/apsl/ and read it before using this file.
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*
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* The Original Code and all software distributed under the License are
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* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
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* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
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* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
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* Please see the License for the specific language governing rights and
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* limitations under the License.
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*
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* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
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*/
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/*
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)select.h 8.2 (Berkeley) 1/4/94
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*/
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#ifndef _SYS_SELECT_H_
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#define _SYS_SELECT_H_
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#include <sys/appleapiopts.h>
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#include <sys/cdefs.h>
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#include <sys/_types.h>
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/*
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* [XSI] The <sys/select.h> header shall define the fd_set type as a structure.
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* The timespec structure shall be defined as described in <time.h>
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* The <sys/select.h> header shall define the timeval structure.
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*/
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#include <sys/_types/_fd_def.h>
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#include <sys/_types/_timespec.h>
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#include <sys/_types/_timeval.h>
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/*
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* The time_t and suseconds_t types shall be defined as described in
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* <sys/types.h>
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* The sigset_t type shall be defined as described in <signal.h>
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*/
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#include <sys/_types/_time_t.h>
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#include <sys/_types/_suseconds_t.h>
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#include <sys/_types/_sigset_t.h>
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/*
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* [XSI] FD_CLR, FD_ISSET, FD_SET, FD_ZERO may be declared as a function, or
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* defined as a macro, or both
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* [XSI] FD_SETSIZE shall be defined as a macro
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*/
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/*
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* Select uses bit masks of file descriptors in longs. These macros
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* manipulate such bit fields (the filesystem macros use chars). The
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* extra protection here is to permit application redefinition above
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* the default size.
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*/
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#include <sys/_types/_fd_setsize.h>
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#include <sys/_types/_fd_set.h>
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#include <sys/_types/_fd_clr.h>
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#include <sys/_types/_fd_isset.h>
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#include <sys/_types/_fd_zero.h>
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#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
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#include <sys/_types/_fd_copy.h>
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#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
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#ifdef KERNEL
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#include <sys/kernel_types.h>
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#include <kern/waitq.h>
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#include <sys/event.h>
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/*
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* Used to maintain information about processes that wish to be
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* notified when I/O becomes possible.
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*/
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#ifdef KERNEL_PRIVATE
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struct selinfo {
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union {
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struct waitq si_waitq; /* waitq for wait/wakeup */
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uint8_t si_waitq_storage[WQ_OPAQUE_SIZE]; /* Opaque and "real" versions of waitq has different sizes
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* defined in Mach and BSD layers,
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* allocating extra storage to mitigate that */
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};
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struct klist si_note; /* JMM - temporary separation */
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u_int si_flags; /* see below */
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};
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#define SI_COLL 0x0001 /* obsolete */
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#define SI_RECORDED 0x0004 /* obsolete */
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#define SI_INITED 0x0008 /* obsolete */
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#define SI_CLEAR 0x0010 /* obsolete */
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#define SI_KNPOSTING 0x0020 /* posting to knotes */
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#define SI_SELSPEC 0x0040 /* has spec_filtops knote hooked */
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#else
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struct selinfo;
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#endif
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__BEGIN_DECLS
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extern int selwait;
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/*
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* Now these are the laws of VNOP_SELECT, as old and as true as the sky,
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* And the device that shall keep it may prosper, but the device that shall
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* break it must receive ENODEV:
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*
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* 1. Take a lock to protect against other selects on the same vnode.
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* 2. Return 1 if data is ready to be read.
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* 3. Return 0 and call `selrecord` on a handy `selinfo` structure if there
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* is no data.
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* 4. Call `selwakeup` when the vnode has an active `selrecord` and data
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* can be read or written (depending on the seltype).
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* 5. If there's a `selrecord` and no corresponding `selwakeup`, but the
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* vnode is going away, call `selthreadclear`.
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*/
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void selrecord(proc_t selector, struct selinfo *, void *);
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void selwakeup(struct selinfo *);
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void selthreadclear(struct selinfo *);
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#if XNU_KERNEL_PRIVATE
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struct knote;
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struct _select;
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void select_cleanup_uthread(struct _select *);
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#define SELSPEC_RECORD_MARKER ((struct select_set *)-1)
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typedef void (^selspec_record_hook_t)(struct selinfo *sip);
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void selspec_attach(struct knote *, struct selinfo *);
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void selspec_detach(struct knote *);
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#endif
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__END_DECLS
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#else /* !KERNEL */
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__BEGIN_DECLS
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#ifndef __MWERKS__
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int pselect(int, fd_set * __restrict, fd_set * __restrict,
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fd_set * __restrict, const struct timespec * __restrict,
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const sigset_t * __restrict)
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#if defined(_DARWIN_C_SOURCE) || defined(_DARWIN_UNLIMITED_SELECT)
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__DARWIN_EXTSN_C(pselect)
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#else /* !_DARWIN_C_SOURCE && !_DARWIN_UNLIMITED_SELECT */
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# if defined(__LP64__) && !__DARWIN_NON_CANCELABLE
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__DARWIN_1050(pselect)
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# else /* !__LP64__ || __DARWIN_NON_CANCELABLE */
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__DARWIN_ALIAS_C(pselect)
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# endif /* __LP64__ && !__DARWIN_NON_CANCELABLE */
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#endif /* _DARWIN_C_SOURCE || _DARWIN_UNLIMITED_SELECT */
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;
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#endif /* __MWERKS__ */
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__END_DECLS
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#include <sys/_select.h> /* select() prototype */
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#endif /* ! KERNEL */
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#endif /* !_SYS_SELECT_H_ */
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