/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#include "SharedDIB.h"

namespace mozilla {

namespace gfx {

SharedDIB::SharedDIB() :

  mShMem(nullptr)

{

}

SharedDIB::~SharedDIB()

{

  Close();

}

nsresult

SharedDIB::Create(uint32_t aSize)

{

  Close();

  mShMem = new base::SharedMemory();

  if (!mShMem || !mShMem->Create(aSize))

    return NS_ERROR_OUT_OF_MEMORY;

  return NS_OK;

}

bool

SharedDIB::IsValid()

{

  if (!mShMem)

    return false;

  return base::SharedMemory::IsHandleValid(mShMem->handle());

}

nsresult

SharedDIB::Close()

{

  delete mShMem;

  mShMem = nullptr;

  return NS_OK;

}

nsresult

SharedDIB::Attach(Handle aHandle, uint32_t aSize)

{

  Close();

  mShMem = new base::SharedMemory(aHandle, false);

  if(!mShMem)

    return NS_ERROR_OUT_OF_MEMORY;

  return NS_OK;

}

nsresult

SharedDIB::ShareToProcess(base::ProcessId aTargetPid, Handle *aNewHandle)

{

  if (!mShMem)

    return NS_ERROR_UNEXPECTED;

  if (!mShMem->ShareToProcess(aTargetPid, aNewHandle))

    return NS_ERROR_UNEXPECTED;

  return NS_OK;

}

} // namespace gfx

} // namespace mozilla