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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY_MA NAGER_H_ | 5 #ifndef COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY_MA NAGER_H_ |
6 #define COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY_MA NAGER_H_ | 6 #define COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY_MA NAGER_H_ |
7 | 7 |
8 #include <stddef.h> | 8 #include <stddef.h> |
9 | 9 |
10 #include "base/macros.h" | 10 #include "base/macros.h" |
11 #include "base/memory/discardable_memory_allocator.h" | 11 #include "base/memory/discardable_memory_allocator.h" |
12 #include "base/memory/ref_counted.h" | 12 #include "base/memory/ref_counted.h" |
13 #include "base/memory/shared_memory_handle.h" | 13 #include "base/memory/shared_memory_handle.h" |
14 #include "base/synchronization/lock.h" | 14 #include "base/synchronization/lock.h" |
15 #include "base/trace_event/memory_dump_provider.h" | 15 #include "base/trace_event/memory_dump_provider.h" |
16 #include "components/discardable_memory/common/discardable_memory_export.h" | 16 #include "components/discardable_memory/common/discardable_memory_export.h" |
17 #include "components/discardable_memory/common/discardable_shared_memory_heap.h" | 17 #include "components/discardable_memory/common/discardable_shared_memory_heap.h" |
18 #include "components/discardable_memory/common/discardable_shared_memory_id.h" | 18 #include "components/discardable_memory/public/interfaces/discardable_shared_mem ory_manager.mojom.h" |
19 | |
20 namespace base { | |
21 class SingleThreadTaskRunner; | |
22 } | |
19 | 23 |
20 namespace discardable_memory { | 24 namespace discardable_memory { |
21 | 25 |
22 // Implementation of DiscardableMemoryAllocator that allocates | 26 // Implementation of DiscardableMemoryAllocator that allocates |
23 // discardable memory segments through the browser process. | 27 // discardable memory segments through the browser process. |
24 class DISCARDABLE_MEMORY_EXPORT ClientDiscardableSharedMemoryManager | 28 class DISCARDABLE_MEMORY_EXPORT ClientDiscardableSharedMemoryManager |
25 : public base::DiscardableMemoryAllocator, | 29 : public base::DiscardableMemoryAllocator, |
26 public base::trace_event::MemoryDumpProvider { | 30 public base::trace_event::MemoryDumpProvider { |
27 public: | 31 public: |
28 class Delegate { | 32 ClientDiscardableSharedMemoryManager( |
29 public: | 33 mojom::DiscardableSharedMemoryManagerPtrInfo info, |
30 virtual void AllocateLockedDiscardableSharedMemory( | 34 base::SingleThreadTaskRunner* io_task_runner); |
31 size_t size, | |
32 DiscardableSharedMemoryId id, | |
33 base::SharedMemoryHandle* handle) = 0; | |
34 virtual void DeletedDiscardableSharedMemory( | |
35 DiscardableSharedMemoryId id) = 0; | |
36 | |
37 protected: | |
38 virtual ~Delegate() {} | |
39 }; | |
40 | |
41 explicit ClientDiscardableSharedMemoryManager(Delegate* delegate); | |
42 ~ClientDiscardableSharedMemoryManager() override; | 35 ~ClientDiscardableSharedMemoryManager() override; |
43 | 36 |
44 // Overridden from base::DiscardableMemoryAllocator: | 37 // Overridden from base::DiscardableMemoryAllocator: |
45 std::unique_ptr<base::DiscardableMemory> AllocateLockedDiscardableMemory( | 38 std::unique_ptr<base::DiscardableMemory> AllocateLockedDiscardableMemory( |
46 size_t size) override; | 39 size_t size) override; |
47 | 40 |
48 // Overridden from base::trace_event::MemoryDumpProvider: | 41 // Overridden from base::trace_event::MemoryDumpProvider: |
49 bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args, | 42 bool OnMemoryDump(const base::trace_event::MemoryDumpArgs& args, |
50 base::trace_event::ProcessMemoryDump* pmd) override; | 43 base::trace_event::ProcessMemoryDump* pmd) override; |
51 | 44 |
(...skipping 11 matching lines...) Expand all Loading... | |
63 | 56 |
64 struct Statistics { | 57 struct Statistics { |
65 size_t total_size; | 58 size_t total_size; |
66 size_t freelist_size; | 59 size_t freelist_size; |
67 }; | 60 }; |
68 | 61 |
69 Statistics GetStatistics() const; | 62 Statistics GetStatistics() const; |
70 | 63 |
71 private: | 64 private: |
72 std::unique_ptr<base::DiscardableSharedMemory> | 65 std::unique_ptr<base::DiscardableSharedMemory> |
73 AllocateLockedDiscardableSharedMemory(size_t size, | 66 AllocateLockedDiscardableSharedMemory(size_t size, int32_t id); |
74 DiscardableSharedMemoryId id); | 67 void AllocateOnIOThread( |
reveman
2016/11/18 05:26:50
nit: s/AllocateOnIOThread/AllocateOnIO/ as it's co
Peng
2016/11/18 16:28:28
Done.
| |
68 size_t size, | |
69 int32_t id, | |
70 std::unique_ptr<base::DiscardableSharedMemory>* memory, | |
71 base::WaitableEvent* event); | |
72 void OnAllocateCompletedOnIOThread( | |
reveman
2016/11/18 05:26:50
nit: too many "On" :) I don't think we need the On
Peng
2016/11/18 16:28:28
Done.
| |
73 std::unique_ptr<base::DiscardableSharedMemory>* memory, | |
74 base::WaitableEvent* event, | |
75 mojo::ScopedSharedBufferHandle mojo_handle); | |
76 | |
77 void DeletedDiscardableSharedMemory(int32_t id); | |
75 void MemoryUsageChanged(size_t new_bytes_allocated, | 78 void MemoryUsageChanged(size_t new_bytes_allocated, |
76 size_t new_bytes_free) const; | 79 size_t new_bytes_free) const; |
77 | 80 |
81 scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_; | |
82 std::unique_ptr<mojom::DiscardableSharedMemoryManagerPtr> manager_; | |
reveman
2016/11/18 05:26:50
Can we rename this variable to have it be less con
Peng
2016/11/18 16:28:28
Done.
| |
83 | |
78 mutable base::Lock lock_; | 84 mutable base::Lock lock_; |
79 DiscardableSharedMemoryHeap heap_; | 85 std::unique_ptr<DiscardableSharedMemoryHeap> heap_; |
reveman
2016/11/18 05:26:50
why std::unique_ptr instead of allocated as part o
Peng
2016/11/18 16:28:28
The destructor of |heap_| may call DeletedDiscarda
reveman
2016/11/18 21:55:25
Got it. Can you add a comment where you reset this
| |
80 Delegate* const delegate_; | |
81 | 86 |
82 DISALLOW_COPY_AND_ASSIGN(ClientDiscardableSharedMemoryManager); | 87 DISALLOW_COPY_AND_ASSIGN(ClientDiscardableSharedMemoryManager); |
83 }; | 88 }; |
84 | 89 |
85 } // namespace discardable_memory | 90 } // namespace discardable_memory |
86 | 91 |
87 #endif // COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY _MANAGER_H_ | 92 #endif // COMPONENTS_DISCARDABLE_MEMORY_CLIENT_CLIENT_DISCARDABLE_SHARED_MEMORY _MANAGER_H_ |
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