//
// Copyright (c) 2011 Advanced Micro Devices, Inc. All rights reserved.
//

#ifndef CPUKERNEL_HPP_
#define CPUKERNEL_HPP_

#include "top.hpp"
#include "device/device.hpp"
#include <amdocl/cl_kernel.h>

#include "device/cpu/cpumapping.hpp"

//! \namespace cpu CPU Device Implementation
namespace cpu {

//! \class CPU kernel
class Kernel : public device::Kernel
{
private:
    const void* entryPoint_; //!< entry for the kernel

    std::vector< std::pair<size_t, size_t> > args_;
    std::vector< std::pair < HCtoDCmap, size_t> > HCtoDCmaps_;
    std::vector< HCtoDCmap > internal_maps_;
public:
    uint nature_; //!< kernel's nature
    uint privateSize_; //!< WorkItem's private memory size (in bytes)

private:
    //! Disable default copy constructor
    Kernel(const Kernel&);
    //! Disable operator=
    Kernel& operator=(const Kernel&);

public:
    void addArg(size_t size, size_t alignment) {
        args_.push_back(std::pair<size_t, size_t>(size, alignment));
    }

    size_t getArgSize(int argIndex) const {
        return args_[argIndex].first;
    }

    size_t getArgAlignment(int argIndex) const {
        return args_[argIndex].second;
    }

    void addInternalMap(HCtoDCmap *new_map) {
        if (new_map != NULL) {
            internal_maps_.push_back(*new_map);
            this->addInternalMap(new_map->internal_field_map);
            this->addInternalMap(new_map->next_field_map);
        }
        else
            return;
    }

    void addHCtoDCmap(HCtoDCmap *new_map) {
        if (new_map != NULL) {
            if (HCtoDCmaps_.size() > 0)
                HCtoDCmaps_.push_back(std::pair< HCtoDCmap, size_t >(*new_map, HCtoDCmaps_.back().second));
            else
                HCtoDCmaps_.push_back(std::pair< HCtoDCmap, size_t >(*new_map, 0));
        }
        else
            return;
    }

    HCtoDCmap getHCtoDCmap(int mapIndex) const {
        return HCtoDCmaps_[mapIndex].first;
    }


    uint getArgNumber() {
        return HCtoDCmaps_.size();
    }

    //! Default constructor
    Kernel(const std::string& name)
        : device::Kernel(name), entryPoint_(NULL), nature_(0),
          privateSize_(CLK_PRIVATE_MEMORY_SIZE)
    {
        workGroupInfo_.size_ = CPU_MAX_WORKGROUP_SIZE;
    }

    //! Default destructor
    ~Kernel() {}

    //! Returns the CPU kernel entry point
    const void* getEntryPoint() const { return entryPoint_; }

    //! Sets the CPU kernel entry point
    void setEntryPoint(const void* entryPoint) { entryPoint_ = entryPoint; }

    //! Returns true if the kernel has a call to barrier
    bool hasBarrier() const { return 0 != (nature_ & KN_HAS_BARRIER); }

    //! Returns the private memory size of a single WorkItem
    uint getWorkItemPrivateMemSize() const { return privateSize_; }
};

} // namespace cpu

#endif // CPUKERNEL_HPP_