ipc/glue/SharedMemoryBasic_android.h@b8a032363ba2 (annotated)
ipc/glue/SharedMemoryBasic_android.h
Thu, 22 Jan 2015 13:21:57 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Thu, 22 Jan 2015 13:21:57 +0100
- branch
- TOR_BUG_9701
- changeset 15
- b8a032363ba2
- permissions
- -rw-r--r--
Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6
| michael@0 | 1 | /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
| michael@0 | 2 | * vim: sw=2 ts=8 et : |
| michael@0 | 3 | */ |
| michael@0 | 4 | /* This Source Code Form is subject to the terms of the Mozilla Public |
| michael@0 | 5 | * License, v. 2.0. If a copy of the MPL was not distributed with this |
| michael@0 | 6 | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| michael@0 | 7 | |
| michael@0 | 8 | #ifndef mozilla_ipc_SharedMemoryBasic_android_h |
| michael@0 | 9 | #define mozilla_ipc_SharedMemoryBasic_android_h |
| michael@0 | 10 | |
| michael@0 | 11 | #include "base/file_descriptor_posix.h" |
| michael@0 | 12 | |
| michael@0 | 13 | #include "SharedMemory.h" |
| michael@0 | 14 | |
| michael@0 | 15 | // |
| michael@0 | 16 | // This is a low-level wrapper around platform shared memory. Don't |
| michael@0 | 17 | // use it directly; use Shmem allocated through IPDL interfaces. |
| michael@0 | 18 | // |
| michael@0 | 19 | |
| michael@0 | 20 | namespace mozilla { |
| michael@0 | 21 | namespace ipc { |
| michael@0 | 22 | |
| michael@0 | 23 | class SharedMemoryBasic : public SharedMemory |
| michael@0 | 24 | { |
| michael@0 | 25 | public: |
| michael@0 | 26 | typedef base::FileDescriptor Handle; |
| michael@0 | 27 | |
| michael@0 | 28 | SharedMemoryBasic(); |
| michael@0 | 29 | |
| michael@0 | 30 | SharedMemoryBasic(const Handle& aHandle); |
| michael@0 | 31 | |
| michael@0 | 32 | virtual ~SharedMemoryBasic(); |
| michael@0 | 33 | |
| michael@0 | 34 | virtual bool Create(size_t aNbytes) MOZ_OVERRIDE; |
| michael@0 | 35 | |
| michael@0 | 36 | virtual bool Map(size_t nBytes) MOZ_OVERRIDE; |
| michael@0 | 37 | |
| michael@0 | 38 | virtual void* memory() const MOZ_OVERRIDE |
| michael@0 | 39 | { |
| michael@0 | 40 | return mMemory; |
| michael@0 | 41 | } |
| michael@0 | 42 | |
| michael@0 | 43 | virtual SharedMemoryType Type() const MOZ_OVERRIDE |
| michael@0 | 44 | { |
| michael@0 | 45 | return TYPE_BASIC; |
| michael@0 | 46 | } |
| michael@0 | 47 | |
| michael@0 | 48 | static Handle NULLHandle() |
| michael@0 | 49 | { |
| michael@0 | 50 | return Handle(); |
| michael@0 | 51 | } |
| michael@0 | 52 | |
| michael@0 | 53 | static bool IsHandleValid(const Handle &aHandle) |
| michael@0 | 54 | { |
| michael@0 | 55 | return aHandle.fd >= 0; |
| michael@0 | 56 | } |
| michael@0 | 57 | |
| michael@0 | 58 | bool ShareToProcess(base::ProcessHandle aProcess, |
| michael@0 | 59 | Handle* aNewHandle); |
| michael@0 | 60 | |
| michael@0 | 61 | private: |
| michael@0 | 62 | void Unmap(); |
| michael@0 | 63 | void Destroy(); |
| michael@0 | 64 | |
| michael@0 | 65 | // The /dev/ashmem fd we allocate. |
| michael@0 | 66 | int mShmFd; |
| michael@0 | 67 | // Pointer to mapped region, null if unmapped. |
| michael@0 | 68 | void *mMemory; |
| michael@0 | 69 | }; |
| michael@0 | 70 | |
| michael@0 | 71 | } // namespace ipc |
| michael@0 | 72 | } // namespace mozilla |
| michael@0 | 73 | |
| michael@0 | 74 | #endif // ifndef mozilla_ipc_SharedMemoryBasic_android_h |
