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comparison: ipc/glue/SharedMemoryBasic_android.h
ipc/glue/SharedMemoryBasic_android.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:a7b32bf62346 |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- | |
| 2 * vim: sw=2 ts=8 et : | |
| 3 */ | |
| 4 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 5 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 6 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 7 | |
| 8 #ifndef mozilla_ipc_SharedMemoryBasic_android_h | |
| 9 #define mozilla_ipc_SharedMemoryBasic_android_h | |
| 10 | |
| 11 #include "base/file_descriptor_posix.h" | |
| 12 | |
| 13 #include "SharedMemory.h" | |
| 14 | |
| 15 // | |
| 16 // This is a low-level wrapper around platform shared memory. Don't | |
| 17 // use it directly; use Shmem allocated through IPDL interfaces. | |
| 18 // | |
| 19 | |
| 20 namespace mozilla { | |
| 21 namespace ipc { | |
| 22 | |
| 23 class SharedMemoryBasic : public SharedMemory | |
| 24 { | |
| 25 public: | |
| 26 typedef base::FileDescriptor Handle; | |
| 27 | |
| 28 SharedMemoryBasic(); | |
| 29 | |
| 30 SharedMemoryBasic(const Handle& aHandle); | |
| 31 | |
| 32 virtual ~SharedMemoryBasic(); | |
| 33 | |
| 34 virtual bool Create(size_t aNbytes) MOZ_OVERRIDE; | |
| 35 | |
| 36 virtual bool Map(size_t nBytes) MOZ_OVERRIDE; | |
| 37 | |
| 38 virtual void* memory() const MOZ_OVERRIDE | |
| 39 { | |
| 40 return mMemory; | |
| 41 } | |
| 42 | |
| 43 virtual SharedMemoryType Type() const MOZ_OVERRIDE | |
| 44 { | |
| 45 return TYPE_BASIC; | |
| 46 } | |
| 47 | |
| 48 static Handle NULLHandle() | |
| 49 { | |
| 50 return Handle(); | |
| 51 } | |
| 52 | |
| 53 static bool IsHandleValid(const Handle &aHandle) | |
| 54 { | |
| 55 return aHandle.fd >= 0; | |
| 56 } | |
| 57 | |
| 58 bool ShareToProcess(base::ProcessHandle aProcess, | |
| 59 Handle* aNewHandle); | |
| 60 | |
| 61 private: | |
| 62 void Unmap(); | |
| 63 void Destroy(); | |
| 64 | |
| 65 // The /dev/ashmem fd we allocate. | |
| 66 int mShmFd; | |
| 67 // Pointer to mapped region, null if unmapped. | |
| 68 void *mMemory; | |
| 69 }; | |
| 70 | |
| 71 } // namespace ipc | |
| 72 } // namespace mozilla | |
| 73 | |
| 74 #endif // ifndef mozilla_ipc_SharedMemoryBasic_android_h |
