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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef CHROME_RENDERER_RENDER_PROCESS_IMPL_H_ | |
6 #define CHROME_RENDERER_RENDER_PROCESS_IMPL_H_ | |
7 #pragma once | |
8 | |
9 #include "base/timer.h" | |
10 #include "chrome/renderer/render_process.h" | |
11 #include "native_client/src/shared/imc/nacl_imc.h" | |
12 | |
13 namespace skia { | |
14 class PlatformCanvas; | |
15 } | |
16 | |
17 // Implementation of the RenderProcess interface for the regular browser. | |
18 // See also MockRenderProcess which implements the active "RenderProcess" when | |
19 // running under certain unit tests. | |
20 class RenderProcessImpl : public RenderProcess { | |
21 public: | |
22 RenderProcessImpl(); | |
23 ~RenderProcessImpl(); | |
24 | |
25 // RenderProcess implementation. | |
26 virtual skia::PlatformCanvas* GetDrawingCanvas(TransportDIB** memory, | |
27 const gfx::Rect& rect); | |
28 virtual void ReleaseTransportDIB(TransportDIB* memory); | |
29 virtual bool UseInProcessPlugins() const; | |
30 virtual bool HasInitializedMediaLibrary() const; | |
31 | |
32 // Like UseInProcessPlugins(), but called before RenderProcess is created | |
33 // and does not allow overriding by tests. This just checks the command line | |
34 // each time. | |
35 static bool InProcessPlugins(); | |
36 | |
37 private: | |
38 // Look in the shared memory cache for a suitable object to reuse. | |
39 // result: (output) the memory found | |
40 // size: the resulting memory will be >= this size, in bytes | |
41 // returns: false if a suitable DIB memory could not be found | |
42 bool GetTransportDIBFromCache(TransportDIB** result, size_t size); | |
43 | |
44 // Maybe put the given shared memory into the shared memory cache. Returns | |
45 // true if the SharedMemory object was stored in the cache; otherwise, false | |
46 // is returned. | |
47 bool PutSharedMemInCache(TransportDIB* memory); | |
48 | |
49 void ClearTransportDIBCache(); | |
50 | |
51 // Return the index of a free cache slot in which to install a transport DIB | |
52 // of the given size. If all entries in the cache are larger than the given | |
53 // size, this doesn't free any slots and returns -1. | |
54 int FindFreeCacheSlot(size_t size); | |
55 | |
56 // Create a new transport DIB of, at least, the given size. Return NULL on | |
57 // error. | |
58 TransportDIB* CreateTransportDIB(size_t size); | |
59 void FreeTransportDIB(TransportDIB*); | |
60 | |
61 // A very simplistic and small cache. If an entry in this array is non-null, | |
62 // then it points to a SharedMemory object that is available for reuse. | |
63 TransportDIB* shared_mem_cache_[2]; | |
64 | |
65 // This DelayTimer cleans up our cache 5 seconds after the last use. | |
66 base::DelayTimer<RenderProcessImpl> shared_mem_cache_cleaner_; | |
67 | |
68 // TransportDIB sequence number | |
69 uint32 transport_dib_next_sequence_number_; | |
70 | |
71 bool in_process_plugins_; | |
72 | |
73 DISALLOW_COPY_AND_ASSIGN(RenderProcessImpl); | |
74 }; | |
75 | |
76 #endif // CHROME_RENDERER_RENDER_PROCESS_IMPL_H_ | |
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