| // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef CONTENT_RENDERER_PEPPER_PPB_BUFFER_IMPL_H_ |
| #define CONTENT_RENDERER_PEPPER_PPB_BUFFER_IMPL_H_ |
| |
| #include "base/basictypes.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/memory/scoped_ptr.h" |
| #include "base/memory/shared_memory.h" |
| #include "ppapi/shared_impl/resource.h" |
| #include "ppapi/thunk/ppb_buffer_api.h" |
| |
| namespace content { |
| |
| class PPB_Buffer_Impl : public ppapi::Resource, |
| public ppapi::thunk::PPB_Buffer_API { |
| public: |
| static PP_Resource Create(PP_Instance instance, uint32_t size); |
| static scoped_refptr<PPB_Buffer_Impl> CreateResource(PP_Instance instance, |
| uint32_t size); |
| |
| virtual PPB_Buffer_Impl* AsPPB_Buffer_Impl(); |
| |
| base::SharedMemory* shared_memory() const { return shared_memory_.get(); } |
| uint32_t size() const { return size_; } |
| |
| // Resource overrides. |
| ppapi::thunk::PPB_Buffer_API* AsPPB_Buffer_API() override; |
| |
| // PPB_Buffer_API implementation. |
| PP_Bool Describe(uint32_t* size_in_bytes) override; |
| PP_Bool IsMapped() override; |
| void* Map() override; |
| void Unmap() override; |
| |
| // Trusted. |
| int32_t GetSharedMemory(int* handle) override; |
| |
| private: |
| ~PPB_Buffer_Impl() override; |
| |
| explicit PPB_Buffer_Impl(PP_Instance instance); |
| bool Init(uint32_t size); |
| |
| scoped_ptr<base::SharedMemory> shared_memory_; |
| uint32_t size_; |
| int map_count_; |
| |
| DISALLOW_COPY_AND_ASSIGN(PPB_Buffer_Impl); |
| }; |
| |
| // Ensures that the given buffer is mapped, and returns it to its previous |
| // mapped state in the destructor. |
| class BufferAutoMapper { |
| public: |
| explicit BufferAutoMapper(ppapi::thunk::PPB_Buffer_API* api); |
| ~BufferAutoMapper(); |
| |
| // Will be NULL on failure to map. |
| void* data() { return data_; } |
| uint32_t size() { return size_; } |
| |
| private: |
| ppapi::thunk::PPB_Buffer_API* api_; |
| |
| bool needs_unmap_; |
| |
| void* data_; |
| uint32_t size_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BufferAutoMapper); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_RENDERER_PEPPER_PPB_BUFFER_IMPL_H_ |