1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2014 Garrett D'Amore <garrett@damore.org> 24 * 25 * Copyright 2004 Sun Microsystems, Inc. All rights reserved. 26 * Use is subject to license terms. 27 */ 28 29 #ifndef _SEMAPHORE_H 30 #define _SEMAPHORE_H 31 32 #include <sys/feature_tests.h> 33 34 #include <sys/types.h> 35 #include <sys/fcntl.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 typedef struct { 42 /* this structure must be the same as sema_t in <synch.h> */ 43 uint32_t sem_count; /* semaphore count */ 44 uint16_t sem_type; 45 uint16_t sem_magic; 46 upad64_t sem_pad1[3]; /* reserved for a mutex_t */ 47 upad64_t sem_pad2[2]; /* reserved for a cond_t */ 48 } sem_t; 49 50 #define SEM_FAILED ((sem_t *)(-1)) 51 52 /* 53 * function prototypes 54 */ 55 int sem_init(sem_t *, int, unsigned int); 56 int sem_destroy(sem_t *); 57 sem_t *sem_open(const char *, int, ...); 58 int sem_close(sem_t *); 59 int sem_unlink(const char *); 60 int sem_wait(sem_t *); 61 /* 62 * Inclusion of <time.h> breaks X/Open and POSIX namespace. 63 * The timespec structure while allowed in XPG6 and POSIX.1003d-1999, 64 * is not permitted in prior POSIX or X/Open specifications even 65 * though functions beginning with sem_* are allowed. 66 */ 67 #if !defined(__XOPEN_OR_POSIX) || defined(_XPG6) || defined(__EXTENSIONS__) 68 struct timespec; 69 int sem_timedwait(sem_t *_RESTRICT_KYWD, 70 const struct timespec *_RESTRICT_KYWD); 71 int sem_reltimedwait_np(sem_t *_RESTRICT_KYWD, 72 const struct timespec *_RESTRICT_KYWD); 73 #endif /* !defined(__XOPEN_OR_POSIX) || defined(_XPG6) ... */ 74 int sem_trywait(sem_t *); 75 int sem_post(sem_t *); 76 int sem_getvalue(sem_t *_RESTRICT_KYWD, int *_RESTRICT_KYWD); 77 78 #ifdef __cplusplus 79 } 80 #endif 81 82 #endif /* _SEMAPHORE_H */ 83