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1 // Copyright (c) 2013 The Chromium Authors. All rights reserved. | 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 | 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 #include "base/memory/discardable_memory.h" | 5 #include "base/memory/discardable_memory.h" |
6 | 6 |
7 #include "base/android/sys_utils.h" | 7 #include "base/android/sys_utils.h" |
8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 9 #include "base/compiler_specific.h" |
10 #include "base/lazy_instance.h" | 10 #include "base/lazy_instance.h" |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "base/memory/discardable_memory_ashmem.h" | 12 #include "base/memory/discardable_memory_ashmem.h" |
13 #include "base/memory/discardable_memory_ashmem_allocator.h" | 13 #include "base/memory/discardable_memory_ashmem_allocator.h" |
14 #include "base/memory/discardable_memory_emulated.h" | 14 #include "base/memory/discardable_memory_emulated.h" |
15 #include "base/memory/discardable_memory_malloc.h" | 15 #include "base/memory/discardable_memory_malloc.h" |
16 | 16 |
17 namespace base { | 17 namespace base { |
18 namespace { | 18 namespace { |
19 | 19 |
20 const char kAshmemAllocatorName[] = "DiscardableMemoryAshmemAllocator"; | 20 const char kAshmemAllocatorName[] = "DiscardableMemoryAshmemAllocator"; |
21 | 21 |
22 // When ashmem is used, have the DiscardableMemoryManager trigger userspace | 22 // For Ashmem, have the DiscardableMemoryManager trigger userspace eviction |
23 // eviction when address space usage gets too high (e.g. 512 MBytes). | 23 // when address space usage gets too high (e.g. 512 MBytes). |
24 const size_t kAshmemMaxAddressSpaceUsage = 512 * 1024 * 1024; | 24 const size_t kAshmemMemoryLimit = 512 * 1024 * 1024; |
25 | 25 |
26 // Holds the state used for ashmem allocations. | 26 size_t GetOptimalAshmemRegionSizeForAllocator() { |
27 struct AshmemGlobalContext { | 27 // Note that this may do some I/O (without hitting the disk though) so it |
28 AshmemGlobalContext() | 28 // should not be called on the critical path. |
29 : allocator(kAshmemAllocatorName, | 29 return base::android::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; |
30 GetOptimalAshmemRegionSizeForAllocator()) { | 30 } |
31 manager.SetMemoryLimit(kAshmemMaxAddressSpaceUsage); | |
32 } | |
33 | 31 |
| 32 // Holds the shared state used for allocations. |
| 33 struct SharedState { |
| 34 SharedState() |
| 35 : manager(kAshmemMemoryLimit, kAshmemMemoryLimit), |
| 36 allocator(kAshmemAllocatorName, |
| 37 GetOptimalAshmemRegionSizeForAllocator()) {} |
| 38 |
| 39 internal::DiscardableMemoryManager manager; |
34 internal::DiscardableMemoryAshmemAllocator allocator; | 40 internal::DiscardableMemoryAshmemAllocator allocator; |
35 internal::DiscardableMemoryManager manager; | |
36 | |
37 private: | |
38 // Returns 64 MBytes for a 512 MBytes device, 128 MBytes for 1024 MBytes... | |
39 static size_t GetOptimalAshmemRegionSizeForAllocator() { | |
40 // Note that this may do some I/O (without hitting the disk though) so it | |
41 // should not be called on the critical path. | |
42 return base::android::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; | |
43 } | |
44 }; | 41 }; |
45 | 42 LazyInstance<SharedState>::Leaky g_shared_state = LAZY_INSTANCE_INITIALIZER; |
46 LazyInstance<AshmemGlobalContext>::Leaky g_context = LAZY_INSTANCE_INITIALIZER; | |
47 | 43 |
48 } // namespace | 44 } // namespace |
49 | 45 |
50 // static | 46 // static |
51 void DiscardableMemory::RegisterMemoryPressureListeners() { | 47 void DiscardableMemory::RegisterMemoryPressureListeners() { |
52 internal::DiscardableMemoryEmulated::RegisterMemoryPressureListeners(); | 48 internal::DiscardableMemoryEmulated::RegisterMemoryPressureListeners(); |
53 } | 49 } |
54 | 50 |
55 // static | 51 // static |
56 void DiscardableMemory::UnregisterMemoryPressureListeners() { | 52 void DiscardableMemory::UnregisterMemoryPressureListeners() { |
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69 } | 65 } |
70 | 66 |
71 // static | 67 // static |
72 scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType( | 68 scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType( |
73 DiscardableMemoryType type, size_t size) { | 69 DiscardableMemoryType type, size_t size) { |
74 switch (type) { | 70 switch (type) { |
75 case DISCARDABLE_MEMORY_TYPE_NONE: | 71 case DISCARDABLE_MEMORY_TYPE_NONE: |
76 case DISCARDABLE_MEMORY_TYPE_MAC: | 72 case DISCARDABLE_MEMORY_TYPE_MAC: |
77 return scoped_ptr<DiscardableMemory>(); | 73 return scoped_ptr<DiscardableMemory>(); |
78 case DISCARDABLE_MEMORY_TYPE_ASHMEM: { | 74 case DISCARDABLE_MEMORY_TYPE_ASHMEM: { |
79 AshmemGlobalContext* const global_context = g_context.Pointer(); | 75 SharedState* const shared_state = g_shared_state.Pointer(); |
80 scoped_ptr<internal::DiscardableMemoryAshmem> memory( | 76 scoped_ptr<internal::DiscardableMemoryAshmem> memory( |
81 new internal::DiscardableMemoryAshmem( | 77 new internal::DiscardableMemoryAshmem( |
82 size, &global_context->allocator, &global_context->manager)); | 78 size, &shared_state->allocator, &shared_state->manager)); |
83 if (!memory->Initialize()) | 79 if (!memory->Initialize()) |
84 return scoped_ptr<DiscardableMemory>(); | 80 return scoped_ptr<DiscardableMemory>(); |
85 | 81 |
86 return memory.PassAs<DiscardableMemory>(); | 82 return memory.PassAs<DiscardableMemory>(); |
87 } | 83 } |
88 case DISCARDABLE_MEMORY_TYPE_EMULATED: { | 84 case DISCARDABLE_MEMORY_TYPE_EMULATED: { |
89 scoped_ptr<internal::DiscardableMemoryEmulated> memory( | 85 scoped_ptr<internal::DiscardableMemoryEmulated> memory( |
90 new internal::DiscardableMemoryEmulated(size)); | 86 new internal::DiscardableMemoryEmulated(size)); |
91 if (!memory->Initialize()) | 87 if (!memory->Initialize()) |
92 return scoped_ptr<DiscardableMemory>(); | 88 return scoped_ptr<DiscardableMemory>(); |
93 | 89 |
94 return memory.PassAs<DiscardableMemory>(); | 90 return memory.PassAs<DiscardableMemory>(); |
95 } | 91 } |
96 case DISCARDABLE_MEMORY_TYPE_MALLOC: { | 92 case DISCARDABLE_MEMORY_TYPE_MALLOC: { |
97 scoped_ptr<internal::DiscardableMemoryMalloc> memory( | 93 scoped_ptr<internal::DiscardableMemoryMalloc> memory( |
98 new internal::DiscardableMemoryMalloc(size)); | 94 new internal::DiscardableMemoryMalloc(size)); |
99 if (!memory->Initialize()) | 95 if (!memory->Initialize()) |
100 return scoped_ptr<DiscardableMemory>(); | 96 return scoped_ptr<DiscardableMemory>(); |
101 | 97 |
102 return memory.PassAs<DiscardableMemory>(); | 98 return memory.PassAs<DiscardableMemory>(); |
103 } | 99 } |
104 } | 100 } |
105 | 101 |
106 NOTREACHED(); | 102 NOTREACHED(); |
107 return scoped_ptr<DiscardableMemory>(); | 103 return scoped_ptr<DiscardableMemory>(); |
108 } | 104 } |
109 | 105 |
110 // static | 106 // static |
111 void DiscardableMemory::PurgeForTesting() { | 107 void DiscardableMemory::PurgeForTesting() { |
112 g_context.Pointer()->manager.PurgeAll(); | 108 g_shared_state.Pointer()->manager.PurgeAll(); |
113 internal::DiscardableMemoryEmulated::PurgeForTesting(); | 109 internal::DiscardableMemoryEmulated::PurgeForTesting(); |
114 } | 110 } |
115 | 111 |
116 } // namespace base | 112 } // namespace base |
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