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#include "task/PxTask.h"
#include "ExtCpuWorkerThread.h"
#include "ExtDefaultCpuDispatcher.h"
#include "foundation/PxFPU.h"

using namespace physx;

Ext::CpuWorkerThread::CpuWorkerThread() : mOwner(NULL), mThreadId(0)
{
}

Ext::CpuWorkerThread::~CpuWorkerThread()
{
}

#define HighPriority	true
#define RegularPriority	false

void Ext::CpuWorkerThread::execute()
{
	mThreadId = getId();

	const PxDefaultCpuDispatcherWaitForWorkMode::Enum ownerWaitForWorkMode = mOwner->getWaitForWorkMode();

	while(!quitIsSignalled())
    {
		if(PxDefaultCpuDispatcherWaitForWorkMode::eWAIT_FOR_WORK == ownerWaitForWorkMode)
			mOwner->resetWakeSignal();

		// PT: look for high priority tasks first, across threads
		PxBaseTask* task = getJob<HighPriority>();
		if(!task)
			task = mOwner->fetchNextTask<HighPriority>();

		// PT: then look for regular tasks
		if(!task)
			task = getJob<RegularPriority>();
		if(!task)
			task = mOwner->fetchNextTask<RegularPriority>();

		if(task)
		{
			mOwner->runTask(*task);
			task->release();
		}
		else if(PxDefaultCpuDispatcherWaitForWorkMode::eYIELD_THREAD == ownerWaitForWorkMode)
		{
			PxThread::yield();
		}
		else if(PxDefaultCpuDispatcherWaitForWorkMode::eYIELD_PROCESSOR == ownerWaitForWorkMode)
		{
			const PxU32 pauseCounter = mOwner->getYieldProcessorCount();
			for(PxU32 j = 0; j < pauseCounter; j++)
				PxThread::yieldProcesor();
		}
		else
		{
			PX_ASSERT(PxDefaultCpuDispatcherWaitForWorkMode::eWAIT_FOR_WORK == ownerWaitForWorkMode);
			mOwner->waitForWork();
		}
	}

	quit();
}