haiku/headers/private/shared/Thread.h

/*
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of the Software, and to permit persons to whom the Software is furnished to do
so, subject to the following conditions:

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and shall be included in all copies or substantial portions of the Software.

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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF TITLE, MERCHANTABILITY,
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Tracker(TM), Be(R), BeOS(R), and BeIA(TM) are trademarks or registered trademarks
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All rights reserved.
*/
#ifndef __THREAD__
#define __THREAD__


#include <Debug.h>
#include <Looper.h>
#include <OS.h>

#include "ObjectList.h"
#include "FunctionObject.h"


namespace BPrivate {

class SimpleThread {
	// this should only be used as a base class,
	// subclass needs to add proper locking mechanism
public:
	SimpleThread(int32 priority = B_LOW_PRIORITY, const char* name = 0);
	virtual ~SimpleThread();

	void Go();

private:
	static status_t RunBinder(void*);
	virtual void Run() = 0;

protected:
	thread_id fScanThread;
	int32 fPriority;
	const char* fName;
};


class Thread : private SimpleThread {
public:
	static void Launch(FunctionObject* functor,
		int32 priority = B_LOW_PRIORITY, const char* name = 0);

private:
	Thread(FunctionObject*, int32 priority, const char* name);
	~Thread();
	virtual void Run();

	FunctionObject* fFunctor;
};


class ThreadSequence : private SimpleThread {
public:
	static void Launch(BObjectList<FunctionObject>*, bool async = true,
		int32 priority = B_LOW_PRIORITY);

private:
	ThreadSequence(BObjectList<FunctionObject>*, int32 priority);
	~ThreadSequence();

	virtual void Run();
	static void Run(BObjectList<FunctionObject>*list);

	BObjectList<FunctionObject>* fFunctorList;
};


// would use SingleParamFunctionObjectWithResult, except mwcc won't handle this
template <class Param1>
class SingleParamFunctionObjectWorkaround : public
	FunctionObjectWithResult<status_t> {
public:
	SingleParamFunctionObjectWorkaround(
		status_t (*function)(Param1), Param1 param1)
		:	fFunction(function),
			fParam1(param1)
		{
		}

	virtual void operator()()
		{ (fFunction)(fParam1); }

	virtual ulong Size() const { return sizeof(*this); }

private:
	status_t (*fFunction)(Param1);
	Param1 fParam1;
};


template <class T>
class SimpleMemberFunctionObjectWorkaround : public
	FunctionObjectWithResult<status_t> {
public:
	SimpleMemberFunctionObjectWorkaround(status_t (T::*function)(), T* onThis)
		:	fFunction(function),
			fOnThis(onThis)
		{
		}

	virtual void operator()()
		{ (fOnThis->*fFunction)(); }

	virtual ulong Size() const { return sizeof(*this); }

private:
	status_t (T::*fFunction)();
	T fOnThis;
};


template <class Param1, class Param2>
class TwoParamFunctionObjectWorkaround : public
	FunctionObjectWithResult<status_t>  {
public:
	TwoParamFunctionObjectWorkaround(status_t (*callThis)(Param1, Param2),
		Param1 param1, Param2 param2)
		:	function(callThis),
			fParam1(param1),
			fParam2(param2)
		{
		}

	virtual void operator()()
		{ (function)(fParam1, fParam2); }

	virtual uint32 Size() const { return sizeof(*this); }

private:
	status_t (*function)(Param1, Param2);
	Param1 fParam1;
	Param2 fParam2;
};


template <class Param1, class Param2, class Param3>
class ThreeParamFunctionObjectWorkaround : public
	FunctionObjectWithResult<status_t>  {
public:
	ThreeParamFunctionObjectWorkaround(
		status_t (*callThis)(Param1, Param2, Param3),
		Param1 param1, Param2 param2, Param3 param3)
		:	function(callThis),
			fParam1(param1),
			fParam2(param2),
			fParam3(param3)
		{
		}

	virtual void operator()()
		{ (function)(fParam1, fParam2, fParam3); }

	virtual uint32 Size() const { return sizeof(*this); }

private:
	status_t (*function)(Param1, Param2, Param3);
	Param1 fParam1;
	Param2 fParam2;
	Param3 fParam3;
};


template <class Param1, class Param2, class Param3, class Param4>
class FourParamFunctionObjectWorkaround : public
	FunctionObjectWithResult<status_t>  {
public:
	FourParamFunctionObjectWorkaround(
		status_t (*callThis)(Param1, Param2, Param3, Param4),
		Param1 param1, Param2 param2, Param3 param3, Param4 param4)
		:	function(callThis),
			fParam1(param1),
			fParam2(param2),
			fParam3(param3),
			fParam4(param4)
		{
		}

	virtual void operator()()
		{ (function)(fParam1, fParam2, fParam3, fParam4); }

	virtual uint32 Size() const { return sizeof(*this); }

private:
	status_t (*function)(Param1, Param2, Param3, Param4);
	Param1 fParam1;
	Param2 fParam2;
	Param3 fParam3;
	Param4 fParam4;
};


template<class Param1>
void
LaunchInNewThread(const char* name, int32 priority, status_t (*func)(Param1),
	Param1 p1)
{
	Thread::Launch(new SingleParamFunctionObjectWorkaround<Param1>(func, p1),
		priority, name);
}


template<class T>
void
LaunchInNewThread(const char* name, int32 priority, status_t (T::*function)(),
	T* onThis)
{
	Thread::Launch(new SimpleMemberFunctionObjectWorkaround<T>(function,
		onThis), priority, name);
}


template<class Param1, class Param2>
void
LaunchInNewThread(const char* name, int32 priority,
	status_t (*func)(Param1, Param2),
	Param1 p1, Param2 p2)
{
	Thread::Launch(new
		TwoParamFunctionObjectWorkaround<Param1, Param2>(func, p1, p2),
			priority, name);
}


template<class Param1, class Param2, class Param3>
void
LaunchInNewThread(const char* name, int32 priority,
	status_t (*func)(Param1, Param2, Param3),
	Param1 p1, Param2 p2, Param3 p3)
{
	Thread::Launch(new ThreeParamFunctionObjectWorkaround<Param1, Param2,
		Param3>(func, p1, p2, p3), priority, name);
}


template<class Param1, class Param2, class Param3, class Param4>
void
LaunchInNewThread(const char* name, int32 priority,
	status_t (*func)(Param1, Param2, Param3, Param4),
	Param1 p1, Param2 p2, Param3 p3, Param4 p4)
{
	Thread::Launch(new FourParamFunctionObjectWorkaround<Param1, Param2,
		Param3, Param4>(func, p1, p2, p3, p4), priority, name);
}


} // namespace BPrivate

using namespace BPrivate;

#endif	// __THREAD__