The Tor Browser: gfx/ipc/SharedDIB.h@b8a032363ba2

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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 #ifndef gfx_SharedDIB_h__

     7 #define gfx_SharedDIB_h__

     9 #include "base/shared_memory.h"

    10 #include "nscore.h"

    12 namespace mozilla {

    13 namespace gfx {

    15 class SharedDIB

    16 {

    17 public:

    18   typedef base::SharedMemoryHandle Handle;

    20 public:

    21   SharedDIB();

    22   ~SharedDIB();

    24   // Create and allocate a new shared dib.

    25   nsresult Create(uint32_t aSize);

    27   // Destroy or release resources associated with this dib.

    28   nsresult Close();

    30   // Returns true if this object contains a valid dib.

    31   bool IsValid();

    33   // Wrap a new shared dib around allocated shared memory. Note aHandle must point

    34   // to a memory section large enough to hold a dib of size aSize, otherwise this

    35   // will fail.

    36   nsresult Attach(Handle aHandle, uint32_t aSize);

    38   // Returns a SharedMemoryHandle suitable for sharing with another process.

    39   nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle);

    41 protected:

    42   base::SharedMemory *mShMem;

    43 };

    45 } // gfx

    46 } // mozilla

    48 #endif

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