124 lines
2.6 KiB
C++
124 lines
2.6 KiB
C++
/* Copyright (c) <2003-2019> <Julio Jerez, Newton Game Dynamics>
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*
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* This software is provided 'as-is', without any express or implied
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* warranty. In no event will the authors be held liable for any damages
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* arising from the use of this software.
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*
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* Permission is granted to anyone to use this software for any purpose,
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* including commercial applications, and to alter it and redistribute it
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* freely, subject to the following restrictions:
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*
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* 1. The origin of this software must not be misrepresented; you must not
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* claim that you wrote the original software. If you use this software
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* in a product, an acknowledgment in the product documentation would be
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* appreciated but is not required.
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*
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* 2. Altered source versions must be plainly marked as such, and must not be
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* misrepresented as being the original software.
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*
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* 3. This notice may not be removed or altered from any source distribution.
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*/
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#include "dgStdafx.h"
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#include "dgThread.h"
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#include "dgMutexThread.h"
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dgMutexThread::dgMutexThread(const char* const name, dgInt32 id)
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:dgThread(name, id)
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,m_mutex()
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,m_parentMutex()
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{
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Init ();
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}
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dgMutexThread::~dgMutexThread(void)
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{
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Terminate();
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}
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void dgMutexThread::Terminate()
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{
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if (IsThreadActive()) {
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dgInterlockedExchange(&m_terminate, 1);
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m_mutex.Release();
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Close();
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}
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}
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void dgMutexThread::Execute (dgInt32 threadID)
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{
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// suspend this tread until the call thread decide to
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dgAssert (threadID == m_id);
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while (!m_terminate) {
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// wait for the main thread to signal an update
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m_mutex.Wait();
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if (!m_terminate) {
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TickCallback(threadID);
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}
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m_parentMutex.Release();
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}
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}
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void dgMutexThread::Tick()
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{
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// let the thread run until the update function return
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m_mutex.Release();
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m_parentMutex.Wait();
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}
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dgAsyncThread::dgAsyncThread(const char* const name, dgInt32 id)
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:dgThread(name, id)
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,m_mutex()
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,m_inUpdate(0)
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,m_beginUpdate(0)
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{
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Init();
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}
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dgAsyncThread::~dgAsyncThread(void)
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{
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Terminate();
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}
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void dgAsyncThread::Terminate()
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{
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if (IsThreadActive()) {
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dgInterlockedExchange(&m_terminate, 1);
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m_mutex.Release();
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Close();
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}
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}
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void dgAsyncThread::Sync()
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{
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while (m_inUpdate) {
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dgThreadYield();
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}
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}
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void dgAsyncThread::Tick()
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{
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// let the thread run until the update function return
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Sync();
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m_beginUpdate = 0;
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m_mutex.Release();
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while (!m_beginUpdate) {
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dgThreadPause();
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}
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}
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void dgAsyncThread::Execute(dgInt32 threadID)
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{
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dgAssert(threadID == m_id);
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while (!m_terminate) {
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m_mutex.Wait();
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if (!m_terminate) {
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dgInterlockedExchange(&m_inUpdate, 1);
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dgInterlockedExchange(&m_beginUpdate, 1);
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TickCallback(threadID);
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dgInterlockedExchange(&m_inUpdate, 0);
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}
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}
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} |