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1 // Copyright (c) 2013 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 CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_ | |
6 #define CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_ | |
7 | |
8 #include <stddef.h> | |
9 | |
10 #include <map> | |
11 #include <memory> | |
12 #include <set> | |
13 | |
14 #include "base/containers/hash_tables.h" | |
15 #include "base/hash.h" | |
16 #include "base/macros.h" | |
17 #include "base/memory/ref_counted.h" | |
18 #include "base/memory/shared_memory.h" | |
19 #include "base/synchronization/lock.h" | |
20 #include "base/trace_event/memory_dump_provider.h" | |
21 #include "cc/resources/shared_bitmap_manager.h" | |
22 #include "content/common/content_export.h" | |
23 | |
24 namespace BASE_HASH_NAMESPACE { | |
25 template <> | |
26 struct hash<cc::SharedBitmapId> { | |
27 size_t operator()(const cc::SharedBitmapId& id) const { | |
28 return base::Hash(reinterpret_cast<const char*>(id.name), sizeof(id.name)); | |
29 } | |
30 }; | |
31 } // namespace BASE_HASH_NAMESPACE | |
32 | |
33 namespace content { | |
34 class BitmapData; | |
35 class HostSharedBitmapManager; | |
36 | |
37 class CONTENT_EXPORT HostSharedBitmapManagerClient { | |
38 public: | |
39 explicit HostSharedBitmapManagerClient(HostSharedBitmapManager* manager); | |
40 | |
41 ~HostSharedBitmapManagerClient(); | |
42 | |
43 void AllocateSharedBitmapForChild( | |
44 base::ProcessHandle process_handle, | |
45 size_t buffer_size, | |
46 const cc::SharedBitmapId& id, | |
47 base::SharedMemoryHandle* shared_memory_handle); | |
48 void ChildAllocatedSharedBitmap(size_t buffer_size, | |
49 const base::SharedMemoryHandle& handle, | |
50 const cc::SharedBitmapId& id); | |
51 void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id); | |
52 | |
53 private: | |
54 HostSharedBitmapManager* manager_; | |
55 | |
56 // Lock must be held around access to owned_bitmaps_. | |
57 base::Lock lock_; | |
58 base::hash_set<cc::SharedBitmapId> owned_bitmaps_; | |
59 | |
60 DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManagerClient); | |
61 }; | |
62 | |
63 class CONTENT_EXPORT HostSharedBitmapManager | |
64 : public cc::SharedBitmapManager, | |
65 public base::trace_event::MemoryDumpProvider { | |
66 public: | |
67 HostSharedBitmapManager(); | |
68 ~HostSharedBitmapManager() override; | |
69 | |
70 static HostSharedBitmapManager* current(); | |
71 | |
72 // cc::SharedBitmapManager implementation. | |
73 std::unique_ptr<cc::SharedBitmap> AllocateSharedBitmap( | |
74 const gfx::Size& size) override; | |
75 std::unique_ptr<cc::SharedBitmap> GetSharedBitmapFromId( | |
76 const gfx::Size& size, | |
77 const cc::SharedBitmapId&) override; | |
78 | |
79 // base::trace_event::MemoryDumpProvider implementation. | |
80 bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args, | |
81 base::trace_event::ProcessMemoryDump* pmd) override; | |
82 | |
83 size_t AllocatedBitmapCount() const; | |
84 | |
85 void FreeSharedMemoryFromMap(const cc::SharedBitmapId& id); | |
86 | |
87 private: | |
88 friend class HostSharedBitmapManagerClient; | |
89 | |
90 void AllocateSharedBitmapForChild( | |
91 base::ProcessHandle process_handle, | |
92 size_t buffer_size, | |
93 const cc::SharedBitmapId& id, | |
94 base::SharedMemoryHandle* shared_memory_handle); | |
95 bool ChildAllocatedSharedBitmap(size_t buffer_size, | |
96 const base::SharedMemoryHandle& handle, | |
97 const cc::SharedBitmapId& id); | |
98 void ChildDeletedSharedBitmap(const cc::SharedBitmapId& id); | |
99 | |
100 mutable base::Lock lock_; | |
101 | |
102 typedef base::hash_map<cc::SharedBitmapId, scoped_refptr<BitmapData> > | |
103 BitmapMap; | |
104 BitmapMap handle_map_; | |
105 | |
106 DISALLOW_COPY_AND_ASSIGN(HostSharedBitmapManager); | |
107 }; | |
108 | |
109 } // namespace content | |
110 | |
111 #endif // CONTENT_COMMON_HOST_SHARED_BITMAP_MANAGER_H_ | |
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