athena/resource_manager/public/resource_manager_delegate.h

   1 // Copyright 2014 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 #ifndef ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_
   6 #define ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_
   7
   8 #include <string>
   9
  10 #include "base/macros.h"
  11
  12 namespace athena {
  13
  14 // The resource manager delegate which abstracts system function calls to allow
  15 // unit tests to override them.
  16 class ResourceManagerDelegate {
  17  public:
  18   static ResourceManagerDelegate* CreateResourceManagerDelegate();
  19
  20   ResourceManagerDelegate() {}
  21   virtual ~ResourceManagerDelegate() {}
  22
  23   // Returns the percentage of memory used in the system.
  24   virtual int GetUsedMemoryInPercent() = 0;
  25
  26   // Returns the time memory pressure interval time in ms to be used by the
  27   // memory pressure monitoring system.
  28   virtual int MemoryPressureIntervalInMS() = 0;
  29 };
  30
  31 }  // namespace athena
  32
  33 #endif  // ATHENA_RESOURCE_MANAGER_PUBLIC_RESOURCE_MANAGER_DLEGATE_H_