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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" | |
8 #include "base/basictypes.h" | 7 #include "base/basictypes.h" |
9 #include "base/compiler_specific.h" | 8 #include "base/compiler_specific.h" |
10 #include "base/lazy_instance.h" | 9 #include "base/lazy_instance.h" |
11 #include "base/logging.h" | 10 #include "base/logging.h" |
12 #include "base/memory/discardable_memory_ashmem.h" | 11 #include "base/memory/discardable_memory_ashmem.h" |
13 #include "base/memory/discardable_memory_ashmem_allocator.h" | 12 #include "base/memory/discardable_memory_ashmem_allocator.h" |
14 #include "base/memory/discardable_memory_emulated.h" | 13 #include "base/memory/discardable_memory_emulated.h" |
15 #include "base/memory/discardable_memory_malloc.h" | 14 #include "base/memory/discardable_memory_malloc.h" |
| 15 #include "base/sys_utils.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 // When ashmem is used, have the DiscardableMemoryManager trigger userspace |
23 // eviction when address space usage gets too high (e.g. 512 MBytes). | 23 // eviction when address space usage gets too high (e.g. 512 MBytes). |
24 const size_t kAshmemMaxAddressSpaceUsage = 512 * 1024 * 1024; | 24 const size_t kAshmemMaxAddressSpaceUsage = 512 * 1024 * 1024; |
25 | 25 |
26 // Holds the state used for ashmem allocations. | 26 // Holds the state used for ashmem allocations. |
27 struct AshmemGlobalContext { | 27 struct AshmemGlobalContext { |
28 AshmemGlobalContext() | 28 AshmemGlobalContext() |
29 : allocator(kAshmemAllocatorName, | 29 : allocator(kAshmemAllocatorName, |
30 GetOptimalAshmemRegionSizeForAllocator()) { | 30 GetOptimalAshmemRegionSizeForAllocator()) { |
31 manager.SetMemoryLimit(kAshmemMaxAddressSpaceUsage); | 31 manager.SetMemoryLimit(kAshmemMaxAddressSpaceUsage); |
32 } | 32 } |
33 | 33 |
34 internal::DiscardableMemoryAshmemAllocator allocator; | 34 internal::DiscardableMemoryAshmemAllocator allocator; |
35 internal::DiscardableMemoryManager manager; | 35 internal::DiscardableMemoryManager manager; |
36 | 36 |
37 private: | 37 private: |
38 // Returns 64 MBytes for a 512 MBytes device, 128 MBytes for 1024 MBytes... | 38 // Returns 64 MBytes for a 512 MBytes device, 128 MBytes for 1024 MBytes... |
39 static size_t GetOptimalAshmemRegionSizeForAllocator() { | 39 static size_t GetOptimalAshmemRegionSizeForAllocator() { |
40 // Note that this may do some I/O (without hitting the disk though) so it | 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. | 41 // should not be called on the critical path. |
42 return base::android::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; | 42 return base::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; |
43 } | 43 } |
44 }; | 44 }; |
45 | 45 |
46 LazyInstance<AshmemGlobalContext>::Leaky g_context = LAZY_INSTANCE_INITIALIZER; | 46 LazyInstance<AshmemGlobalContext>::Leaky g_context = LAZY_INSTANCE_INITIALIZER; |
47 | 47 |
48 } // namespace | 48 } // namespace |
49 | 49 |
50 // static | 50 // static |
51 void DiscardableMemory::RegisterMemoryPressureListeners() { | 51 void DiscardableMemory::RegisterMemoryPressureListeners() { |
52 internal::DiscardableMemoryEmulated::RegisterMemoryPressureListeners(); | 52 internal::DiscardableMemoryEmulated::RegisterMemoryPressureListeners(); |
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107 return scoped_ptr<DiscardableMemory>(); | 107 return scoped_ptr<DiscardableMemory>(); |
108 } | 108 } |
109 | 109 |
110 // static | 110 // static |
111 void DiscardableMemory::PurgeForTesting() { | 111 void DiscardableMemory::PurgeForTesting() { |
112 g_context.Pointer()->manager.PurgeAll(); | 112 g_context.Pointer()->manager.PurgeAll(); |
113 internal::DiscardableMemoryEmulated::PurgeForTesting(); | 113 internal::DiscardableMemoryEmulated::PurgeForTesting(); |
114 } | 114 } |
115 | 115 |
116 } // namespace base | 116 } // namespace base |
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