182657471SMarkus Pfeiffer /** 282657471SMarkus Pfeiffer * Copyright (c) 2013 Larisa Grigore<larisagrigore@gmail.com>. 382657471SMarkus Pfeiffer * All rights reserved. 482657471SMarkus Pfeiffer * 582657471SMarkus Pfeiffer * Redistribution and use in source and binary forms, with or without 682657471SMarkus Pfeiffer * modification, are permitted provided that the following conditions 782657471SMarkus Pfeiffer * are met: 882657471SMarkus Pfeiffer * 1. Redistributions of source code must retain the above copyright 982657471SMarkus Pfeiffer * notice, this list of conditions and the following disclaimer. 1082657471SMarkus Pfeiffer * 2. Redistributions in binary form must reproduce the above copyright 1182657471SMarkus Pfeiffer * notice, this list of conditions and the following disclaimer in the 1282657471SMarkus Pfeiffer * documentation and/or other materials provided with the distribution. 1382657471SMarkus Pfeiffer * 3. The name of the author may not be used to endorse or promote products 1482657471SMarkus Pfeiffer * derived from this software without specific prior written permission. 1582657471SMarkus Pfeiffer * 1682657471SMarkus Pfeiffer * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 1782657471SMarkus Pfeiffer * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1882657471SMarkus Pfeiffer * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1982657471SMarkus Pfeiffer * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 2082657471SMarkus Pfeiffer * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2182657471SMarkus Pfeiffer * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2282657471SMarkus Pfeiffer * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2382657471SMarkus Pfeiffer * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2482657471SMarkus Pfeiffer * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2582657471SMarkus Pfeiffer * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2682657471SMarkus Pfeiffer */ 2782657471SMarkus Pfeiffer 28*ff86f401SSascha Wildner #ifndef _SYSVIPC_LOCK_H_ 29*ff86f401SSascha Wildner #define _SYSVIPC_LOCK_H_ 3082657471SMarkus Pfeiffer 3182657471SMarkus Pfeiffer #include "sysvipc_lock_generic.h" 3282657471SMarkus Pfeiffer 3382657471SMarkus Pfeiffer #define SYSV_RWLOCK 3482657471SMarkus Pfeiffer 3582657471SMarkus Pfeiffer struct sysv_mutex { 3682657471SMarkus Pfeiffer umtx_t _mutex_static_lock; 3782657471SMarkus Pfeiffer int pid_owner; 3882657471SMarkus Pfeiffer int tid_owner; 3982657471SMarkus Pfeiffer }; 4082657471SMarkus Pfeiffer 4182657471SMarkus Pfeiffer struct sysv_rwlock { 4282657471SMarkus Pfeiffer struct sysv_mutex lock; /* monitor lock */ 4382657471SMarkus Pfeiffer int read_signal; 4482657471SMarkus Pfeiffer int write_signal; 4582657471SMarkus Pfeiffer int state; /* 0 = idle >0 = # of readers -1 = writer */ 4682657471SMarkus Pfeiffer int blocked_writers; 4782657471SMarkus Pfeiffer }; 4882657471SMarkus Pfeiffer 4982657471SMarkus Pfeiffer int sysv_mutex_init(struct sysv_mutex *); 5082657471SMarkus Pfeiffer int sysv_mutex_lock(struct sysv_mutex *); 5182657471SMarkus Pfeiffer int sysv_mutex_unlock(struct sysv_mutex *); 5282657471SMarkus Pfeiffer 5382657471SMarkus Pfeiffer int sysv_rwlock_init(struct sysv_rwlock *); 5482657471SMarkus Pfeiffer int sysv_rwlock_unlock(struct sysv_rwlock *); 5582657471SMarkus Pfeiffer int sysv_rwlock_wrlock(struct sysv_rwlock *); 5682657471SMarkus Pfeiffer int sysv_rwlock_rdlock(struct sysv_rwlock *); 5782657471SMarkus Pfeiffer 58*ff86f401SSascha Wildner #endif /* !_SYSVIPC_LOCK_H_ */ 59