/* * 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 namespace embb { namespace base { namespace internal { MutexBase::MutexBase(int mutex_type) : mutex_() { int result = embb_mutex_init(&mutex_, mutex_type); if (EMBB_SUCCESS != result) { EMBB_THROW(ErrorException, "Could not initialize mutex."); } } MutexBase::~MutexBase() { embb_mutex_destroy(&mutex_); } void MutexBase::Lock() { int result = embb_mutex_lock(&mutex_); if (EMBB_SUCCESS != result) { EMBB_THROW(ErrorException, "Could not lock mutex."); } } bool MutexBase::TryLock() { int result = embb_mutex_try_lock(&mutex_); return result == EMBB_SUCCESS; } void MutexBase::Unlock() { int result = embb_mutex_unlock(&mutex_); if (EMBB_SUCCESS != result) { EMBB_THROW(ErrorException, "Could not unlock mutex."); } } } // namespace internal Mutex::Mutex() : MutexBase(EMBB_MUTEX_PLAIN) { } RecursiveMutex::RecursiveMutex() : MutexBase(EMBB_MUTEX_RECURSIVE) { } Spinlock::Spinlock() { embb_spin_init(&spinlock_); } Spinlock::~Spinlock() { embb_spin_destroy(&spinlock_); } void Spinlock::Lock() { int status = embb_spin_lock(&spinlock_); // Currently, embb_spin_lock will always return EMBB_SUCCESS. However, // This might change. if (status != EMBB_SUCCESS) { EMBB_THROW(ErrorException, "Error while locking spinlock"); } } bool Spinlock::TryLock(unsigned int number_spins) { int status = embb_spin_try_lock(&spinlock_, number_spins); if (status == EMBB_BUSY) { return false; } else if (status != EMBB_SUCCESS) { EMBB_THROW(ErrorException, "Error while try-locking spinlock"); } return true; } void Spinlock::Unlock() { int status = embb_spin_unlock(&spinlock_); if (status != EMBB_SUCCESS) { EMBB_THROW(ErrorException, "Error while unlocking spinlock"); } } } // namespace base } // namespace embb