/*M///////////////////////////////////////////////////////////////////////////////////////
//
//  IMPORTANT: READ BEFORE DOWNLOADING, COPYING, INSTALLING OR USING.
//
//  By downloading, copying, installing or using the software you agree to this license.
//  If you do not agree to this license, do not download, install,
//  copy or use the software.
//
//
//                          License Agreement
//                For Open Source Computer Vision Library
//
// Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
// Copyright (C) 2009, Willow Garage Inc., all rights reserved.
// Copyright (C) 2013, OpenCV Foundation, all rights reserved.
// Third party copyrights are property of their respective owners.
//
// Redistribution and use in source and binary forms, with or without modification,
// are permitted provided that the following conditions are met:
//
//   * Redistribution's of source code must retain the above copyright notice,
//     this list of conditions and the following disclaimer.
//
//   * Redistribution's in binary form must reproduce the above copyright notice,
//     this list of conditions and the following disclaimer in the documentation
//     and/or other materials provided with the distribution.
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//   * The name of the copyright holders may not be used to endorse or promote products
//     derived from this software without specific prior written permission.
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// This software is provided by the copyright holders and contributors "as is" and
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// warranties of merchantability and fitness for a particular purpose are disclaimed.
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//M*/

#include "precomp.hpp"

#ifdef HAVE_NVCUVID

using namespace cv::gpucodec::detail;

#ifdef WIN32

namespace
{
    struct UserData
    {
        Thread::Func func;
        void* param;
    };

    DWORD WINAPI WinThreadFunction(LPVOID lpParam)
    {
        UserData* userData = static_cast<UserData*>(lpParam);

        userData->func(userData->param);

        return 0;
    }
}

class cv::gpucodec::detail::Thread::Impl
{
public:
    Impl(Thread::Func func, void* userData)
    {
        userData_.func = func;
        userData_.param = userData;

        thread_ = CreateThread(
            NULL,                   // default security attributes
            0,                      // use default stack size
            WinThreadFunction,      // thread function name
            &userData_,             // argument to thread function
            0,                      // use default creation flags
            &threadId_);            // returns the thread identifier
    }

    ~Impl()
    {
        CloseHandle(thread_);
    }

    void wait()
    {
        WaitForSingleObject(thread_, INFINITE);
    }

private:
    UserData userData_;
    HANDLE thread_;
    DWORD threadId_;
};

#else

namespace
{
    struct UserData
    {
        Thread::Func func;
        void* param;
    };

    void* PThreadFunction(void* lpParam)
    {
        UserData* userData = static_cast<UserData*>(lpParam);

        userData->func(userData->param);

        return 0;
    }
}

class cv::gpucodec::detail::Thread::Impl
{
public:
    Impl(Thread::Func func, void* userData)
    {
        userData_.func = func;
        userData_.param = userData;

        pthread_create(&thread_, NULL, PThreadFunction, &userData_);
    }

    ~Impl()
    {
        pthread_detach(thread_);
    }

    void wait()
    {
        pthread_join(thread_, NULL);
    }

private:
    pthread_t thread_;
    UserData userData_;
};

#endif

cv::gpucodec::detail::Thread::Thread(Func func, void* userData) :
    impl_(new Impl(func, userData))
{
}

void cv::gpucodec::detail::Thread::wait()
{
    impl_->wait();
}

void cv::gpucodec::detail::Thread::sleep(int ms)
{
#ifdef WIN32
    ::Sleep(ms);
#else
    ::usleep(ms * 1000);
#endif
}

template <> void cv::Ptr<cv::gpucodec::detail::Thread::Impl>::delete_obj()
{
    if (obj) delete obj;
}

#endif // HAVE_NVCUVID