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

  Copyright (C)2009 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: 23761 $
 *---------------------------------------------------------------------------*/

#include <nn/config.h>
#if NN_PLATFORM_HAS_MMU

#include <nn/svc.h>
#include <nn/util/util_Result.h>
#include <nn/os/os_TransferMemoryBlock.h>
#include <nn/os/os_SharedMemory.h>
#include <nn/os/os_MemoryMapSelect.h>
#include "os_AddressSpaceManager.h"

namespace nn { namespace os {

void TransferMemoryBlock::Initialize(
        void*   p,
        size_t  size,
        bit32   myPermission,
        bit32   otherPermission )
{
    // 未初期化であることをチェックします。
    NN_TASSERT_( GetAddress() == NULL );
    NN_ALIGN_TASSERT_( p, NN_OS_MEMORY_PAGE_SIZE );
    NN_ALIGN_TASSERT_( size, NN_OS_MEMORY_PAGE_SIZE );

    Handle handle;
    Result result;
    result = nn::svc::CreateMemoryBlock(&handle, reinterpret_cast<uptr>(p), size, myPermission, otherPermission);
    NN_UTIL_PANIC_IF_FAILED(result);
    this->SetHandle(handle);

    SetAddressAndSize(reinterpret_cast<uptr>(p), size);
}

Result TransferMemoryBlock::TryInitialize(
        void*   p,
        size_t  size,
        bit32   myPermission,
        bit32   otherPermission )
{
    // 未初期化であることをチェックします。
    NN_TASSERT_( GetAddress() == NULL );
    NN_ALIGN_TASSERT_( p, NN_OS_MEMORY_PAGE_SIZE );
    NN_ALIGN_TASSERT_( size, NN_OS_MEMORY_PAGE_SIZE );

    Handle handle;
    Result result;
    result = nn::svc::CreateMemoryBlock(&handle, reinterpret_cast<uptr>(p), size, myPermission, otherPermission);
    NN_UTIL_RETURN_IF_FAILED(result);
    this->SetHandle(handle);

    SetAddressAndSize(reinterpret_cast<uptr>(p), size);
    return result;
}

void TransferMemoryBlock::Finalize()
{
    if (this->IsValid())
    {
        Unmap();
        this->HandleObject::Close();
    }
}




Result TransferMemoryBlock::AttachAndMap(
        Handle  handle,
        size_t  size,
        bit32   otherPermission,
        bit32   myPermission )
{
    NN_ALIGN_TASSERT_( size, NN_OS_MEMORY_PAGE_SIZE );

    this->SetHandle(handle);
    return Map(size, otherPermission, myPermission);
}

Result TransferMemoryBlock::Map(
        size_t  size,
        bit32   otherPermission,
        bit32   myPermission )
{
    // 未初期化であることをチェックします。
    NN_TASSERT_( GetAddress() == NULL );
    NN_ALIGN_TASSERT_( size, NN_OS_MEMORY_PAGE_SIZE );

    // 仮想アドレス空間からメモリを取得します。
    uptr addr = detail::AllocateFromSharedMemorySpace(this, size);
    if (addr == NULL)
    {
        NN_TPANIC_("failed to allocate address space.");
    }

    this->MemoryBlockBase::SetReadOnly((myPermission & os::MEMORY_PERMISSION_WRITE) == 0);

    Result result = nn::svc::MapMemoryBlock(GetHandle(), addr, myPermission, otherPermission);
    if( result.IsFailure() )
    {
        return result;
    }

    m_SpaceAllocated = true;
    return result;
}

void TransferMemoryBlock::Unmap()
{
    if (GetAddress() != NULL)
    {
        if( m_SpaceAllocated )
        {
            nn::svc::UnmapMemoryBlock(GetHandle(), GetAddress());
            detail::FreeToSharedMemorySpace(this);
        }
        else
        {
            SetAddressAndSize(0, 0);
        }
    }
}


}}

#endif  // if NN_PLATFORM_HAS_MMU