/*---------------------------------------------------------------------------*
  Project:  Horizon
  File:     fs.cpp

  Copyright (C)2009-2012 Nintendo Co., Ltd.  All rights reserved.

  These coded instructions, statements, and computer programs contain
  proprietary information of Nintendo of America Inc. and/or Nintendo
  Company Ltd., and are protected by Federal copyright law.  They may
  not be disclosed to third parties or copied or duplicated in any form,
  in whole or in part, without the prior written consent of Nintendo.

  $Rev: 46365 $
 *---------------------------------------------------------------------------*/

#include <nn/fs.h>
#include "fs.h"
#include "applet.h"

void FsDemo::Initialize(demo::RenderSystemDrawing* p_RenderSystem, nn::fnd::ExpHeap* p_AppHeap)
{
    Device::Initialize(p_RenderSystem);

    mp_AppHeap = p_AppHeap;
}

void FsDemo::Finalize(void)
{
    Device::Finalize();
}

void FsDemo::Start(void)
{
    Device::Start();

    m_ExitEvent.Initialize(false);

    // Open the file
    m_RomFsFile.Initialize(L"rom:/test.txt");

    // Create buffer to load file contents
    s64 fileSize = m_RomFsFile.GetSize();
    m_FileBuffer = reinterpret_cast<char*>(mp_AppHeap->Allocate(fileSize));

    m_Thread.Start(FsDemo::ThreadFunc, this, m_Stack);
}

void FsDemo::End(void)
{
    // Destroy the buffer
    mp_AppHeap->Free(m_FileBuffer);

    m_ExitEvent.Signal();
    m_Thread.Join();

    // Close the file
    m_RomFsFile.Finalize();

    Device::End();
}

void FsDemo::DrawFrame(void)
{
}

void FsDemo::ThreadFuncImpl()
{
    // Because file reads automatically stop in Sleep Mode, we do not need an exclusive lock of some kind.
    // 
    while ( !m_ExitEvent.TryWait() )
    {
        TransitionHandler::Lock();
        {
            // Move to start of file
            m_RomFsFile.SetPosition(0);

            // Copy file contents to buffer
            s64 fileSize = m_RomFsFile.GetSize();
            m_RomFsFile.Read(m_FileBuffer, fileSize);
        }
        TransitionHandler::Unlock();

        nn::os::Thread::Sleep(nn::fnd::TimeSpan::FromMilliSeconds(100));
    }
}

void FsDemo::ThreadFunc(FsDemo* pFsDemo)
{
    pFsDemo->ThreadFuncImpl();
}


/*---------------------------------------------------------------------------*
  End of file
 *---------------------------------------------------------------------------*/