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 2002 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #ifndef _BARRIER_H 28 #define _BARRIER_H 29 30 #pragma ident "%Z%%M% %I% %E% SMI" 31 32 /* 33 * APIs for the barrier synchronization primitive. 34 */ 35 36 #if defined(sun) 37 #include <synch.h> 38 #else 39 #include <semaphore.h> 40 typedef sem_t sema_t; 41 #endif 42 43 #ifdef __cplusplus 44 extern "C" { 45 #endif 46 47 typedef struct barrier { 48 pthread_mutex_t bar_lock; /* protects bar_numin */ 49 int bar_numin; /* current number of waiters */ 50 51 sema_t bar_sem; /* where everyone waits */ 52 int bar_nthr; /* # of waiters to trigger release */ 53 } barrier_t; 54 55 extern void barrier_init(barrier_t *, int); 56 extern int barrier_wait(barrier_t *); 57 58 #ifdef __cplusplus 59 } 60 #endif 61 62 #endif /* _BARRIER_H */ 63