base/memory/discardable_memory_win.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 #include "base/memory/discardable_memory_shmem.h"
  10
  11 namespace base {
  12
  13 // static
  14 void DiscardableMemory::ReleaseFreeMemory() {
  15   internal::DiscardableMemoryShmem::ReleaseFreeMemory();
  16 }
  17
  18 // static
  19 bool DiscardableMemory::ReduceMemoryUsage() {
  20   return internal::DiscardableMemoryEmulated::ReduceMemoryUsage();
  21 }
  22
  23 // static
  24 void DiscardableMemory::GetSupportedTypes(
  25     std::vector<DiscardableMemoryType>* types) {
  26   const DiscardableMemoryType supported_types[] = {
  27     DISCARDABLE_MEMORY_TYPE_EMULATED,
  28     DISCARDABLE_MEMORY_TYPE_SHMEM
  29   };
  30   types->assign(supported_types, supported_types + arraysize(supported_types));
  31 }
  32
  33 // static
  34 scoped_ptr<DiscardableMemory> DiscardableMemory::CreateLockedMemoryWithType(
  35     DiscardableMemoryType type, size_t size) {
  36   switch (type) {
  37     case DISCARDABLE_MEMORY_TYPE_EMULATED: {
  38       scoped_ptr<internal::DiscardableMemoryEmulated> memory(
  39           new internal::DiscardableMemoryEmulated(size));
  40       if (!memory->Initialize())
  41         return nullptr;
  42
  43       return memory.Pass();
  44     }
  45     case DISCARDABLE_MEMORY_TYPE_SHMEM: {
  46       scoped_ptr<internal::DiscardableMemoryShmem> memory(
  47           new internal::DiscardableMemoryShmem(size));
  48       if (!memory->Initialize())
  49         return nullptr;
  50
  51       return memory.Pass();
  52     }
  53     case DISCARDABLE_MEMORY_TYPE_NONE:
  54     case DISCARDABLE_MEMORY_TYPE_ASHMEM:
  55     case DISCARDABLE_MEMORY_TYPE_MACH:
  56       NOTREACHED();
  57       return nullptr;
  58   }
  59
  60   NOTREACHED();
  61   return nullptr;
  62 }
  63
  64 // static
  65 void DiscardableMemory::PurgeForTesting() {
  66   internal::DiscardableMemoryEmulated::PurgeForTesting();
  67   internal::DiscardableMemoryShmem::PurgeForTesting();
  68 }
  69
  70 }  // namespace base