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comparison: gfx/ipc/SharedDIB.h
gfx/ipc/SharedDIB.h
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| 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/. */ | |
| 5 | |
| 6 #ifndef gfx_SharedDIB_h__ | |
| 7 #define gfx_SharedDIB_h__ | |
| 8 | |
| 9 #include "base/shared_memory.h" | |
| 10 #include "nscore.h" | |
| 11 | |
| 12 namespace mozilla { | |
| 13 namespace gfx { | |
| 14 | |
| 15 class SharedDIB | |
| 16 { | |
| 17 public: | |
| 18 typedef base::SharedMemoryHandle Handle; | |
| 19 | |
| 20 public: | |
| 21 SharedDIB(); | |
| 22 ~SharedDIB(); | |
| 23 | |
| 24 // Create and allocate a new shared dib. | |
| 25 nsresult Create(uint32_t aSize); | |
| 26 | |
| 27 // Destroy or release resources associated with this dib. | |
| 28 nsresult Close(); | |
| 29 | |
| 30 // Returns true if this object contains a valid dib. | |
| 31 bool IsValid(); | |
| 32 | |
| 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); | |
| 37 | |
| 38 // Returns a SharedMemoryHandle suitable for sharing with another process. | |
| 39 nsresult ShareToProcess(base::ProcessHandle aChildProcess, Handle *aChildHandle); | |
| 40 | |
| 41 protected: | |
| 42 base::SharedMemory *mShMem; | |
| 43 }; | |
| 44 | |
| 45 } // gfx | |
| 46 } // mozilla | |
| 47 | |
| 48 #endif |
