1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/ipc/SharedDIB.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,48 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#ifndef gfx_SharedDIB_h__
1.10 +#define gfx_SharedDIB_h__
1.11 +
1.12 +#include "base/shared_memory.h"
1.13 +#include "nscore.h"
1.14 +
1.15 +namespace mozilla {
1.16 +namespace gfx {
1.17 +
1.18 +class SharedDIB
1.19 +{
1.20 +public:
1.21 + typedef base::SharedMemoryHandle Handle;
1.22 +
1.23 +public:
1.24 + SharedDIB();
1.25 + ~SharedDIB();
1.26 +
1.27 + // Create and allocate a new shared dib.
1.28 + nsresult Create(uint32_t aSize);
1.29 +
1.30 + // Destroy or release resources associated with this dib.
1.31 + nsresult Close();
1.32 +
1.33 + // Returns true if this object contains a valid dib.
1.34 + bool IsValid();
1.35 +
1.36 + // Wrap a new shared dib around allocated shared memory. Note aHandle must point
1.37 + // to a memory section large enough to hold a dib of size aSize, otherwise this
1.38 + // will fail.
1.39 + nsresult Attach(Handle aHandle, uint32_t aSize);
1.40 +
1.41 + // Returns a SharedMemoryHandle suitable for sharing with another process.
1.42 + nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle);
1.43 +
1.44 +protected:
1.45 + base::SharedMemory *mShMem;
1.46 +};
1.47 +
1.48 +} // gfx
1.49 +} // mozilla
1.50 +
1.51 +#endif
