111 lines
3.4 KiB
C++
111 lines
3.4 KiB
C++
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/*-------------------------------------------------------------------------
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* drawElements C++ Base Library
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* -----------------------------
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*
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* Copyright 2014 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*//*!
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* \file
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* \brief Thread base class.
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*//*--------------------------------------------------------------------*/
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#include "deThread.hpp"
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#include "deMemory.h"
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#include <exception>
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#include <stdexcept>
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#include <new>
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namespace de
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{
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/*--------------------------------------------------------------------*//*!
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* \brief Thread constructor.
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*//*--------------------------------------------------------------------*/
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Thread::Thread (void)
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: m_thread(0)
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{
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deMemset(&m_attribs, 0, sizeof(m_attribs));
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}
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/*--------------------------------------------------------------------*//*!
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* \brief Destroy thread.
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*
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* If the thread is currently running, OS is instructed to destroy it
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* but the actual behavior is unspecified.
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*//*--------------------------------------------------------------------*/
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Thread::~Thread (void)
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{
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if (m_thread)
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deThread_destroy(m_thread);
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}
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/*--------------------------------------------------------------------*//*!
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* \brief Set thread priority.
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* \param priority deThreadPriority as described in deThread.h. Currently
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* supported values are: DE_THREADPRIORITY_LOWEST,
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* DE_THREADPRIORITY_LOW, DE_THREADPRIORITY_NORMAL,
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* DE_THREADPRIORITY_HIGH, DE_THREADPRIORITY_HIGHEST.
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*
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* Sets priority for the thread start(). setPriority() has no effect
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* if the thread is already running.
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*//*--------------------------------------------------------------------*/
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void Thread::setPriority (deThreadPriority priority)
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{
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m_attribs.priority = priority;
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}
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static void threadFunc (void* arg)
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{
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static_cast<Thread*>(arg)->run();
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}
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/*--------------------------------------------------------------------*//*!
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* \brief Start thread.
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*
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* Starts thread that will execute the virtual run() method.
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*
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* The function will fail if the thread is currently running or has finished
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* but no join() has been called.
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*//*--------------------------------------------------------------------*/
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void Thread::start (void)
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{
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DE_ASSERT(!m_thread);
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m_thread = deThread_create(threadFunc, this, &m_attribs);
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if (!m_thread)
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throw std::bad_alloc();
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}
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/*--------------------------------------------------------------------*//*!
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* \brief Wait for thread to finish and clean up current thread.
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*
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* This function will block until currently running thread has finished.
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* Once the thread has finished, current thread state will be cleaned
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* and thread can be re-launched using start().
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*
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* join() can only be called after a successful call to start().
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*//*--------------------------------------------------------------------*/
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void Thread::join (void)
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{
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DE_ASSERT(m_thread);
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if (!deThread_join(m_thread))
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throw std::runtime_error("Thread::join() failed");
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deThread_destroy(m_thread);
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m_thread = 0;
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}
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} // de
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