1 /*------------------------------------------------------------------------- 2 * drawElements C++ Base Library 3 * ----------------------------- 4 * 5 * Copyright 2014 The Android Open Source Project 6 * 7 * Licensed under the Apache License, Version 2.0 (the "License"); 8 * you may not use this file except in compliance with the License. 9 * You may obtain a copy of the License at 10 * 11 * http://www.apache.org/licenses/LICENSE-2.0 12 * 13 * Unless required by applicable law or agreed to in writing, software 14 * distributed under the License is distributed on an "AS IS" BASIS, 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 16 * See the License for the specific language governing permissions and 17 * limitations under the License. 18 * 19 *//*! 20 * \file 21 * \brief Thread base class. 22 *//*--------------------------------------------------------------------*/ 23 24 #include "deThread.hpp" 25 #include "deMemory.h" 26 27 #include <exception> 28 #include <stdexcept> 29 #include <new> 30 31 namespace de 32 { 33 34 /*--------------------------------------------------------------------*//*! 35 * \brief Thread constructor. 36 *//*--------------------------------------------------------------------*/ 37 Thread::Thread (void) 38 : m_thread(0) 39 { 40 deMemset(&m_attribs, 0, sizeof(m_attribs)); 41 } 42 43 /*--------------------------------------------------------------------*//*! 44 * \brief Destroy thread. 45 * 46 * If the thread is currently running, OS is instructed to destroy it 47 * but the actual behavior is unspecified. 48 *//*--------------------------------------------------------------------*/ 49 Thread::~Thread (void) 50 { 51 if (m_thread) 52 deThread_destroy(m_thread); 53 } 54 55 /*--------------------------------------------------------------------*//*! 56 * \brief Set thread priority. 57 * \param priority deThreadPriority as described in deThread.h. Currently 58 * supported values are: DE_THREADPRIORITY_LOWEST, 59 * DE_THREADPRIORITY_LOW, DE_THREADPRIORITY_NORMAL, 60 * DE_THREADPRIORITY_HIGH, DE_THREADPRIORITY_HIGHEST. 61 * 62 * Sets priority for the thread start(). setPriority() has no effect 63 * if the thread is already running. 64 *//*--------------------------------------------------------------------*/ 65 void Thread::setPriority (deThreadPriority priority) 66 { 67 m_attribs.priority = priority; 68 } 69 70 static void threadFunc (void* arg) 71 { 72 static_cast<Thread*>(arg)->run(); 73 } 74 75 /*--------------------------------------------------------------------*//*! 76 * \brief Start thread. 77 * 78 * Starts thread that will execute the virtual run() method. 79 * 80 * The function will fail if the thread is currently running or has finished 81 * but no join() has been called. 82 *//*--------------------------------------------------------------------*/ 83 void Thread::start (void) 84 { 85 DE_ASSERT(!m_thread); 86 m_thread = deThread_create(threadFunc, this, &m_attribs); 87 if (!m_thread) 88 throw std::bad_alloc(); 89 } 90 91 /*--------------------------------------------------------------------*//*! 92 * \brief Wait for thread to finish and clean up current thread. 93 * 94 * This function will block until currently running thread has finished. 95 * Once the thread has finished, current thread state will be cleaned 96 * and thread can be re-launched using start(). 97 * 98 * join() can only be called after a successful call to start(). 99 *//*--------------------------------------------------------------------*/ 100 void Thread::join (void) 101 { 102 DE_ASSERT(m_thread); 103 if (!deThread_join(m_thread)) 104 throw std::runtime_error("Thread::join() failed"); 105 106 deThread_destroy(m_thread); 107 m_thread = 0; 108 } 109 110 } // de 111
