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Cider Isn't Darwin Emulation, Really
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219/* * Copyright (c) 2000-2007 Apple Inc. All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ *//* $NetBSD: sem.h,v 1.5 1994/06/29 06:45:15 cgd Exp $ */
/* * SVID compatible sem.h file * * Author: Daniel Boulet * John Bellardo modified the implementation for Darwin. 12/2000 */
#ifndef _SYS_SEM_H_#define _SYS_SEM_H_
#include <sys/cdefs.h>#include <sys/_types.h>
/* * [XSI] All of the symbols from <sys/ipc.h> SHALL be defined * when this header is included */#include <sys/ipc.h>
/* * [XSI] The pid_t, time_t, key_t, and size_t types shall be defined as * described in <sys/types.h>. * * NOTE: The definition of the key_t type is implicit from the * inclusion of <sys/ipc.h> */#ifndef _PID_Ttypedef __darwin_pid_t pid_t;#define _PID_T#endif
#ifndef _TIME_T#define _TIME_Ttypedef __darwin_time_t time_t;#endif
#ifndef _SIZE_T#define _SIZE_Ttypedef __darwin_size_t size_t;#endif
/* * Technically, we should force all code references to the new structure * definition, not in just the standards conformance case, and leave the * legacy interface there for binary compatibility only. Currently, we * are only forcing this for programs requesting standards conformance. */#if __DARWIN_UNIX03 || defined(KERNEL)#pragma pack(4)/* * Structure used internally. * * This structure is exposed because standards dictate that it is used as * the semun union member 'buf' as the fourth argment to semctl() when the * third argument is IPC_STAT or IPC_SET. * * Note: only the fields sem_perm, sem_nsems, sem_otime, and sem_ctime * are meaningful in user space. */#if (defined(_POSIX_C_SOURCE) && !defined(_DARWIN_C_SOURCE))struct semid_ds#else#define semid_ds __semid_ds_newstruct __semid_ds_new#endif{ struct __ipc_perm_new sem_perm; /* [XSI] operation permission struct */ __int32_t sem_base; /* 32 bit base ptr for semaphore set */ unsigned short sem_nsems; /* [XSI] number of sems in set */ time_t sem_otime; /* [XSI] last operation time */ __int32_t sem_pad1; /* RESERVED: DO NOT USE! */ time_t sem_ctime; /* [XSI] last change time */ /* Times measured in secs since */ /* 00:00:00 GMT, Jan. 1, 1970 */ __int32_t sem_pad2; /* RESERVED: DO NOT USE! */ __int32_t sem_pad3[4]; /* RESERVED: DO NOT USE! */};#pragma pack()#else /* !__DARWIN_UNIX03 */#define semid_ds __semid_ds_old#endif /* __DARWIN_UNIX03 */
#if !__DARWIN_UNIX03struct __semid_ds_old { struct __ipc_perm_old sem_perm; /* [XSI] operation permission struct */ __int32_t sem_base; /* 32 bit base ptr for semaphore set */ unsigned short sem_nsems; /* [XSI] number of sems in set */ time_t sem_otime; /* [XSI] last operation time */ __int32_t sem_pad1; /* RESERVED: DO NOT USE! */ time_t sem_ctime; /* [XSI] last change time */ /* Times measured in secs since */ /* 00:00:00 GMT, Jan. 1, 1970 */ __int32_t sem_pad2; /* RESERVED: DO NOT USE! */ __int32_t sem_pad3[4]; /* RESERVED: DO NOT USE! */};#endif /* !__DARWIN_UNIX03 */
/* * Possible values for the third argument to semctl() */#define GETNCNT 3 /* [XSI] Return the value of semncnt {READ} */#define GETPID 4 /* [XSI] Return the value of sempid {READ} */#define GETVAL 5 /* [XSI] Return the value of semval {READ} */#define GETALL 6 /* [XSI] Return semvals into arg.array {READ} */#define GETZCNT 7 /* [XSI] Return the value of semzcnt {READ} */#define SETVAL 8 /* [XSI] Set the value of semval to arg.val {ALTER} */#define SETALL 9 /* [XSI] Set semvals from arg.array {ALTER} */
/* A semaphore; this is an anonymous structure, not for external use */struct sem { unsigned short semval; /* semaphore value */ pid_t sempid; /* pid of last operation */ unsigned short semncnt; /* # awaiting semval > cval */ unsigned short semzcnt; /* # awaiting semval == 0 */};
/* * Structure of array element for second argument to semop() */struct sembuf { unsigned short sem_num; /* [XSI] semaphore # */ short sem_op; /* [XSI] semaphore operation */ short sem_flg; /* [XSI] operation flags */};
/* * Possible flag values for sem_flg */#define SEM_UNDO 010000 /* [XSI] Set up adjust on exit entry */
#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)
/* * Union used as the fourth argment to semctl() in all cases. Specific * member values are used for different values of the third parameter: * * Command Member * ------------------------------------------- ------ * GETALL, SETALL array * SETVAL val * IPC_STAT, IPC_SET buf * * The union definition is intended to be defined by the user application * in conforming applications; it is provided here for two reasons: * * 1) Historical source compatability for non-conforming applications * expecting this header to declare the union type on their behalf * * 2) Documentation; specifically, 64 bit applications that do not pass * this structure for 'val', or, alternately, a 64 bit type, will * not function correctly */union semun { int val; /* value for SETVAL */ struct semid_ds *buf; /* buffer for IPC_STAT & IPC_SET */ unsigned short *array; /* array for GETALL & SETALL */};typedef union semun semun_t;
/* * Permissions */#define SEM_A 0200 /* alter permission */#define SEM_R 0400 /* read permission */
#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */
#ifndef KERNEL
__BEGIN_DECLS#if !defined(_POSIX_C_SOURCE) || defined(_DARWIN_C_SOURCE)int semsys(int, ...);#endif /* (!_POSIX_C_SOURCE || _DARWIN_C_SOURCE) */int semctl(int, int, int, ...) __DARWIN_ALIAS(semctl);int semget(key_t, int, int);int semop(int, struct sembuf *, size_t);__END_DECLS
#endif /* !KERNEL */
#endif /* !_SEM_H_ */