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 * Copyright (c) 2024 Advanced Micro Devices, Inc. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice 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 MERCHANTABILITY,
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#ifndef CLHelper_H
#define CLHelper_H

#define CL_USE_DEPRECATED_OPENCL_2_0_APIS
#define CL_USE_DEPRECATED_OPENCL_1_2_APIS
#define CL_USE_DEPRECATED_OPENCL_1_1_APIS

#include <CL/cl.h>
#include <string>
#include <iostream>
#include <sstream>
#include "InputFlags.h"
#include "GPUHelper.h"

struct LocalMemArg 
{
	LocalMemArg(size_t _size) : size(_size) {}
	size_t GetSize() const { return size; }

	private:
	size_t size;
};

class CLHelper : public GPUHelper
{
	cl_platform_id platform;
	cl_device_id *devices;
	cl_program syncfree_program;
    cl_program analyze_levelset_program;

	public:
	static cl_context context;
	static cl_kernel SpTSKernel;
    static cl_kernel SpTSKernel_analyze;
    static cl_kernel SpTSKernel_levelset;
    static cl_kernel SpTSKernel_scalar;
    static cl_kernel SpTSKernel_vector;
    static cl_kernel SpTSKernel_levelsync;
	static cl_command_queue commandQueue;

	CLHelper() {}
	int Init(const std::string &_filename, InputFlags &in_flags);
	void checkStatus(gpuError status, const std::string errString);
	void CopyToDevice(memPointer _d_buf, void *_h_buf, size_t _size, size_t _offset, cl_bool _blocking, cl_event *_ev);
	void CopyToHost(memPointer _d_buf, void *_h_buf, size_t _size, size_t _offset, cl_bool _blocking, cl_event *_ev);
	memPointer AllocateMem(const std::string name, size_t, memPointer_flags flags, void *);
	void FreeMem(memPointer ptr) { clReleaseMemObject(ptr); }
    void Flush() { clFinish(commandQueue); }

	template<typename T, typename... Args>
	void SetArgs(cl_kernel, int i, const T& first, const Args&... rest);
	template<typename... Args>
	void SetArgs(cl_kernel, int i, const LocalMemArg &lmem, const Args&... rest);
	void SetArgs(cl_kernel, int i) {}

	int64_t ComputeTime(cl_event event);

};

template<typename T, typename... Args>
void CLHelper::SetArgs(cl_kernel kernel, int i, const T& first, const Args&... rest)
{
	cl_int status;

	status = clSetKernelArg(kernel, i++, sizeof(T), (void *)& first);
	std::stringstream errStream;
	errStream<<"OpenCL error setting kernel argument "<<i;
	checkStatus(status, errStream.str()) ;

	SetArgs(kernel, i, rest...);
}

template<typename... Args>
void CLHelper::SetArgs(cl_kernel kernel, int i, const LocalMemArg &lmem, const Args&... rest)
{
	cl_int status;
	status = clSetKernelArg(kernel, i++, lmem.GetSize(), NULL);
	std::stringstream errStream;
	errStream<<"OpenCL error setting kernel argument (local memory) "<<i;
	checkStatus(status, errStream.str()) ;

	SetArgs(kernel, i, rest...);

}

#endif //CLHelper_H