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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 <sys/mman.h> | 7 #include <sys/mman.h> |
8 #include <unistd.h> | 8 #include <unistd.h> |
9 | 9 |
10 #include "base/lazy_instance.h" | 10 #include "base/lazy_instance.h" |
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23 | 23 |
24 // Upper limit on the number of discardable memory to avoid hitting file | 24 // Upper limit on the number of discardable memory to avoid hitting file |
25 // descriptor limit. | 25 // descriptor limit. |
26 const int kDiscardableMemoryNumLimit = 128; | 26 const int kDiscardableMemoryNumLimit = 128; |
27 | 27 |
28 } | 28 } |
29 | 29 |
30 namespace base { | 30 namespace base { |
31 | 31 |
32 // static | 32 // static |
33 bool DiscardableMemory::Supported() { | 33 bool DiscardableMemory::SupportedNatively() { |
34 return true; | 34 return true; |
35 } | 35 } |
36 | 36 |
37 DiscardableMemory::~DiscardableMemory() { | 37 DiscardableMemory::~DiscardableMemory() { |
38 if (is_locked_) | 38 if (is_locked_) |
39 Unlock(); | 39 Unlock(); |
40 // If fd_ is smaller than 0, initialization must have failed and | 40 // If fd_ is smaller than 0, initialization must have failed and |
41 // g_num_discardable_memory is not incremented by the caller. | 41 // g_num_discardable_memory is not incremented by the caller. |
42 if (fd_ < 0) | 42 if (fd_ < 0) |
43 return; | 43 return; |
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155 bool DiscardableMemory::PurgeForTestingSupported() { | 155 bool DiscardableMemory::PurgeForTestingSupported() { |
156 return false; | 156 return false; |
157 } | 157 } |
158 | 158 |
159 // static | 159 // static |
160 void DiscardableMemory::PurgeForTesting() { | 160 void DiscardableMemory::PurgeForTesting() { |
161 NOTIMPLEMENTED(); | 161 NOTIMPLEMENTED(); |
162 } | 162 } |
163 | 163 |
164 } // namespace base | 164 } // namespace base |
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