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