/* * Copyright (c) 2014-2015, Siemens AG. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, * this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following disclaimer in the documentation * and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. */ #include #include #include #ifdef EMBB_PLATFORM_THREADING_WINTHREADS int embb_shared_mutex_init(embb_shared_mutex_t* shared_mutex) { InitializeSRWLock(shared_mutex); return EMBB_SUCCESS; } int embb_shared_mutex_lock(embb_shared_mutex_t* shared_mutex) { AcquireSRWLockExclusive(shared_mutex); return EMBB_SUCCESS; } int embb_shared_mutex_try_lock(embb_shared_mutex_t* shared_mutex) { BOOLEAN success; success = TryAcquireSRWLockExclusive(shared_mutex); if (success == FALSE) return EMBB_ERROR; return EMBB_SUCCESS; } int embb_shared_mutex_unlock(embb_shared_mutex_t* shared_mutex) { ReleaseSRWLockExclusive(shared_mutex); return EMBB_SUCCESS; } int embb_shared_mutex_lock_shared(embb_shared_mutex_t* shared_mutex) { AcquireSRWLockShared(shared_mutex); return EMBB_SUCCESS; } int embb_shared_mutex_try_lock_shared(embb_shared_mutex_t* shared_mutex) { BOOLEAN success; success = TryAcquireSRWLockShared(shared_mutex); if (success == FALSE) return EMBB_ERROR; return EMBB_SUCCESS; } int embb_shared_mutex_unlock_shared(embb_shared_mutex_t* shared_mutex) { ReleaseSRWLockShared(shared_mutex); return EMBB_SUCCESS; } void embb_shared_mutex_destroy(embb_shared_mutex_t* shared_mutex) { // Quoting MSDN: "SRW locks do not need to be explicitly destroyed". EMBB_UNUSED(shared_mutex); } #endif /* EMBB_PLATFORM_THREADING_WINTHREADS */ #ifdef EMBB_PLATFORM_THREADING_POSIXTHREADS int embb_shared_mutex_init(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_init(shared_mutex, NULL); if (result != 0) { return EMBB_ERROR; } return EMBB_SUCCESS; } int embb_shared_mutex_lock(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_wrlock(shared_mutex); if (result != 0) { return EMBB_ERROR; } return EMBB_SUCCESS; } int embb_shared_mutex_try_lock(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_trywrlock(shared_mutex); if (result == 0) { return EMBB_SUCCESS; } if (result == EBUSY) { return EMBB_BUSY; } return EMBB_ERROR; } int embb_shared_mutex_unlock(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_unlock(shared_mutex); if (result != 0) { return EMBB_ERROR; } return EMBB_SUCCESS; } int embb_shared_mutex_lock_shared(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_rdlock(shared_mutex); if (result != 0) { return EMBB_ERROR; } return EMBB_SUCCESS; } int embb_shared_mutex_try_lock_shared(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_tryrdlock(shared_mutex); if (result == 0) { return EMBB_SUCCESS; } if (result == EBUSY) { return EMBB_BUSY; } return EMBB_ERROR; } int embb_shared_mutex_unlock_shared(embb_shared_mutex_t* shared_mutex) { int result = pthread_rwlock_unlock(shared_mutex); if (result != 0) { return EMBB_ERROR; } return EMBB_SUCCESS; } void embb_shared_mutex_destroy(embb_shared_mutex_t* shared_mutex) { pthread_rwlock_destroy(shared_mutex); } #endif /* EMBB_PLATFORM_THREADING_POSIXTHREADS */