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comparison: ipc/glue/SharedMemoryBasic_chromium.h
ipc/glue/SharedMemoryBasic_chromium.h
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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_chromium_h | |
| 9 #define mozilla_ipc_SharedMemoryBasic_chromium_h | |
| 10 | |
| 11 #include "base/shared_memory.h" | |
| 12 #include "SharedMemory.h" | |
| 13 | |
| 14 #include "nsDebug.h" | |
| 15 | |
| 16 // | |
| 17 // This is a low-level wrapper around platform shared memory. Don't | |
| 18 // use it directly; use Shmem allocated through IPDL interfaces. | |
| 19 // | |
| 20 | |
| 21 namespace mozilla { | |
| 22 namespace ipc { | |
| 23 | |
| 24 class SharedMemoryBasic : public SharedMemory | |
| 25 { | |
| 26 public: | |
| 27 typedef base::SharedMemoryHandle Handle; | |
| 28 | |
| 29 SharedMemoryBasic() | |
| 30 { | |
| 31 } | |
| 32 | |
| 33 SharedMemoryBasic(const Handle& aHandle) | |
| 34 : mSharedMemory(aHandle, false) | |
| 35 { | |
| 36 } | |
| 37 | |
| 38 virtual bool Create(size_t aNbytes) MOZ_OVERRIDE | |
| 39 { | |
| 40 bool ok = mSharedMemory.Create("", false, false, aNbytes); | |
| 41 if (ok) { | |
| 42 Created(aNbytes); | |
| 43 } | |
| 44 return ok; | |
| 45 } | |
| 46 | |
| 47 virtual bool Map(size_t nBytes) MOZ_OVERRIDE | |
| 48 { | |
| 49 bool ok = mSharedMemory.Map(nBytes); | |
| 50 if (ok) { | |
| 51 Mapped(nBytes); | |
| 52 } | |
| 53 return ok; | |
| 54 } | |
| 55 | |
| 56 virtual void* memory() const MOZ_OVERRIDE | |
| 57 { | |
| 58 return mSharedMemory.memory(); | |
| 59 } | |
| 60 | |
| 61 virtual SharedMemoryType Type() const MOZ_OVERRIDE | |
| 62 { | |
| 63 return TYPE_BASIC; | |
| 64 } | |
| 65 | |
| 66 static Handle NULLHandle() | |
| 67 { | |
| 68 return base::SharedMemory::NULLHandle(); | |
| 69 } | |
| 70 | |
| 71 static bool IsHandleValid(const Handle &aHandle) | |
| 72 { | |
| 73 return base::SharedMemory::IsHandleValid(aHandle); | |
| 74 } | |
| 75 | |
| 76 bool ShareToProcess(base::ProcessHandle process, | |
| 77 Handle* new_handle) | |
| 78 { | |
| 79 base::SharedMemoryHandle handle; | |
| 80 bool ret = mSharedMemory.ShareToProcess(process, &handle); | |
| 81 if (ret) | |
| 82 *new_handle = handle; | |
| 83 return ret; | |
| 84 } | |
| 85 | |
| 86 private: | |
| 87 base::SharedMemory mSharedMemory; | |
| 88 }; | |
| 89 | |
| 90 } // namespace ipc | |
| 91 } // namespace mozilla | |
| 92 | |
| 93 | |
| 94 #endif // ifndef mozilla_ipc_SharedMemoryBasic_chromium_h |
