chrome/browser/memory_purger.h

   1 // Copyright (c) 2010 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 // MemoryPurger provides static APIs to purge as much memory as possible from
   6 // all processes.  These can be hooked to various signals to try and balance
   7 // memory consumption, speed, page swapping, etc.
   8 //
   9 // This was implemented in an attempt to speed up suspend-to-disk by throwing
  10 // away any cached data that can be recomputed.  Memory use will rapidly
  11 // re-expand after this purge is run.
  12
  13 #ifndef CHROME_BROWSER_MEMORY_PURGER_H_
  14 #define CHROME_BROWSER_MEMORY_PURGER_H_
  15
  16 #include "base/basictypes.h"
  17
  18 namespace content {
  19 class RenderProcessHost;
  20 }
  21
  22 class MemoryPurger {
  23  public:
  24   // Call any of these on the UI thread to purge memory from the named places.
  25   static void PurgeAll();
  26   static void PurgeBrowser();
  27   static void PurgeRenderers();
  28   static void PurgeRendererForHost(content::RenderProcessHost* host);
  29
  30  private:
  31   DISALLOW_IMPLICIT_CONSTRUCTORS(MemoryPurger);
  32 };
  33
  34 #endif  // CHROME_BROWSER_MEMORY_PURGER_H_