src/base/memory/discardable_memory_linux.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/memory/discardable_memory.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/discardable_memory_emulated.h"
   9
  10 namespace base {
  11
  12 // static
  13 void DiscardableMemory::RegisterMemoryPressureListeners() {
  14   internal::DiscardableMemoryEmulated::RegisterMemoryPressureListeners();
  15 }
  16
  17 // static
  18 void DiscardableMemory::UnregisterMemoryPressureListeners() {
  19   internal::DiscardableMemoryEmulated::UnregisterMemoryPressureListeners();
  20 }
  21
  22 // static
  23 void DiscardableMemory::GetSupportedTypes(
  24     std::vector<DiscardableMemoryType>* types) {
  25   const DiscardableMemoryType supported_types[] = {
  26     DISCARDABLE_MEMORY_TYPE_EMULATED
  27   };
  28   types->assign(supported_types, supported_types + arraysize(supported_types));
  29 }
  30
  31 // static
  32 scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType(
  33     DiscardableMemoryType type, size_t size) {
  34   switch (type) {
  35     case DISCARDABLE_MEMORY_TYPE_NONE:
  36     case DISCARDABLE_MEMORY_TYPE_ANDROID:
  37     case DISCARDABLE_MEMORY_TYPE_MAC:
  38       return scoped_ptr<DiscardableMemory>();
  39     case DISCARDABLE_MEMORY_TYPE_EMULATED: {
  40       scoped_ptr<internal::DiscardableMemoryEmulated> memory(
  41           new internal::DiscardableMemoryEmulated(size));
  42       if (!memory->Initialize())
  43         return scoped_ptr<DiscardableMemory>();
  44
  45       return memory.PassAs<DiscardableMemory>();
  46     }
  47   }
  48
  49   NOTREACHED();
  50   return scoped_ptr<DiscardableMemory>();
  51 }
  52
  53 // static
  54 bool DiscardableMemory::PurgeForTestingSupported() {
  55   return true;
  56 }
  57
  58 // static
  59 void DiscardableMemory::PurgeForTesting() {
  60   internal::DiscardableMemoryEmulated::PurgeForTesting();
  61 }
  62
  63 }  // namespace base