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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_android.h" | 5 #include "base/memory/discardable_memory_android.h" |
6 | 6 |
7 #include <sys/mman.h> | 7 #include <sys/mman.h> |
8 #include <unistd.h> | 8 #include <unistd.h> |
9 | 9 |
10 #include <limits> | 10 #include <limits> |
11 | 11 |
12 #include "base/android/sys_utils.h" | |
13 #include "base/basictypes.h" | 12 #include "base/basictypes.h" |
14 #include "base/compiler_specific.h" | 13 #include "base/compiler_specific.h" |
15 #include "base/file_util.h" | 14 #include "base/file_util.h" |
16 #include "base/lazy_instance.h" | 15 #include "base/lazy_instance.h" |
17 #include "base/logging.h" | 16 #include "base/logging.h" |
18 #include "base/memory/discardable_memory_allocator_android.h" | 17 #include "base/memory/discardable_memory_allocator_android.h" |
19 #include "base/memory/discardable_memory_emulated.h" | 18 #include "base/memory/discardable_memory_emulated.h" |
| 19 #include "base/sys_utils.h" |
20 #include "third_party/ashmem/ashmem.h" | 20 #include "third_party/ashmem/ashmem.h" |
21 | 21 |
22 namespace base { | 22 namespace base { |
23 namespace { | 23 namespace { |
24 | 24 |
25 const char kAshmemAllocatorName[] = "DiscardableMemoryAllocator"; | 25 const char kAshmemAllocatorName[] = "DiscardableMemoryAllocator"; |
26 | 26 |
27 struct DiscardableMemoryAllocatorWrapper { | 27 struct DiscardableMemoryAllocatorWrapper { |
28 DiscardableMemoryAllocatorWrapper() | 28 DiscardableMemoryAllocatorWrapper() |
29 : allocator(kAshmemAllocatorName, | 29 : allocator(kAshmemAllocatorName, |
30 GetOptimalAshmemRegionSizeForAllocator()) { | 30 GetOptimalAshmemRegionSizeForAllocator()) { |
31 } | 31 } |
32 | 32 |
33 internal::DiscardableMemoryAllocator allocator; | 33 internal::DiscardableMemoryAllocator allocator; |
34 | 34 |
35 private: | 35 private: |
36 // Returns 64 MBytes for a 512 MBytes device, 128 MBytes for 1024 MBytes... | 36 // Returns 64 MBytes for a 512 MBytes device, 128 MBytes for 1024 MBytes... |
37 static size_t GetOptimalAshmemRegionSizeForAllocator() { | 37 static size_t GetOptimalAshmemRegionSizeForAllocator() { |
38 // Note that this may do some I/O (without hitting the disk though) so it | 38 // Note that this may do some I/O (without hitting the disk though) so it |
39 // should not be called on the critical path. | 39 // should not be called on the critical path. |
40 return base::android::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; | 40 return base::SysUtils::AmountOfPhysicalMemoryKB() * 1024 / 8; |
41 } | 41 } |
42 }; | 42 }; |
43 | 43 |
44 LazyInstance<DiscardableMemoryAllocatorWrapper>::Leaky g_context = | 44 LazyInstance<DiscardableMemoryAllocatorWrapper>::Leaky g_context = |
45 LAZY_INSTANCE_INITIALIZER; | 45 LAZY_INSTANCE_INITIALIZER; |
46 | 46 |
47 } // namespace | 47 } // namespace |
48 | 48 |
49 namespace internal { | 49 namespace internal { |
50 | 50 |
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159 bool DiscardableMemory::PurgeForTestingSupported() { | 159 bool DiscardableMemory::PurgeForTestingSupported() { |
160 return false; | 160 return false; |
161 } | 161 } |
162 | 162 |
163 // static | 163 // static |
164 void DiscardableMemory::PurgeForTesting() { | 164 void DiscardableMemory::PurgeForTesting() { |
165 NOTIMPLEMENTED(); | 165 NOTIMPLEMENTED(); |
166 } | 166 } |
167 | 167 |
168 } // namespace base | 168 } // namespace base |
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