1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
3 /* This Source Code Form is subject to the terms of the Mozilla Public
4  * License, v. 2.0. If a copy of the MPL was not distributed with this
5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 
7 #ifndef MOZILLA_LAYERS_REFCOUNTED_SHMEM_H
8 #define MOZILLA_LAYERS_REFCOUNTED_SHMEM_H
9 
10 #include "mozilla/ipc/Shmem.h"
11 #include "chrome/common/ipc_message_utils.h"
12 
13 namespace mozilla {
14 namespace ipc {
15 class IProtocol;
16 }
17 
18 namespace layers {
19 
20 // This class is IPDL-defined
21 class RefCountedShmem;
22 
23 // This just implement the methods externally.
24 class RefCountedShm {
25  public:
26   static uint8_t* GetBytes(const RefCountedShmem& aShm);
27 
28   static size_t GetSize(const RefCountedShmem& aShm);
29 
30   static bool IsValid(const RefCountedShmem& aShm);
31 
32   static bool Alloc(mozilla::ipc::IProtocol* aAllocator, size_t aSize,
33                     RefCountedShmem& aShm);
34 
35   static void Dealloc(mozilla::ipc::IProtocol* aAllocator,
36                       RefCountedShmem& aShm);
37 
38   static int32_t GetReferenceCount(const RefCountedShmem& aShm);
39 
40   static int32_t AddRef(const RefCountedShmem& aShm);
41 
42   static int32_t Release(const RefCountedShmem& aShm);
43 };
44 
45 }  // namespace layers
46 }  // namespace mozilla
47 
48 #endif
49