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