The Tor Browser: gfx/ipc/SharedDIB.cpp@925c144e1f1f

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

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

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

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

     6 #include "SharedDIB.h"

     8 namespace mozilla {

     9 namespace gfx {

    11 SharedDIB::SharedDIB() :

    12   mShMem(nullptr)

    13 {

    14 }

    16 SharedDIB::~SharedDIB()

    17 {

    18   Close();

    19 }

    21 nsresult

    22 SharedDIB::Create(uint32_t aSize)

    23 {

    24   Close();

    26   mShMem = new base::SharedMemory();

    27   if (!mShMem || !mShMem->Create("", false, false, aSize))

    28     return NS_ERROR_OUT_OF_MEMORY;

    30   return NS_OK;

    31 }

    33 bool

    34 SharedDIB::IsValid()

    35 {

    36   if (!mShMem)

    37     return false;

    39   return mShMem->IsHandleValid(mShMem->handle());

    40 }

    42 nsresult

    43 SharedDIB::Close()

    44 {

    45   delete mShMem;

    47   mShMem = nullptr;

    49   return NS_OK;

    50 }

    52 nsresult

    53 SharedDIB::Attach(Handle aHandle, uint32_t aSize)

    54 {

    55   Close();

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

    58   if(!mShMem)

    59     return NS_ERROR_OUT_OF_MEMORY;

    61   return NS_OK;

    62 }

    64 nsresult

    65 SharedDIB::ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle)

    66 {

    67   if (!mShMem)

    68     return NS_ERROR_UNEXPECTED;

    70   if (!mShMem->ShareToProcess(aChildProcess, aChildHandle))

    71     return NS_ERROR_UNEXPECTED;

    73   return NS_OK;

    74 }

    76 } // gfx

    77 } // mozilla

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