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      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 #ifndef CHROME_BROWSER_TASK_MANAGER_RENDERER_RESOURCE_H_
      6 #define CHROME_BROWSER_TASK_MANAGER_RENDERER_RESOURCE_H_
      7 
      8 #include "base/basictypes.h"
      9 #include "chrome/browser/task_manager/resource_provider.h"
     10 
     11 namespace content {
     12 class RenderViewHost;
     13 }
     14 
     15 namespace task_manager {
     16 
     17 // Base class for various types of render process resources that provides common
     18 // functionality like stats tracking.
     19 class RendererResource : public Resource {
     20  public:
     21   RendererResource(base::ProcessHandle process,
     22                    content::RenderViewHost* render_view_host);
     23   virtual ~RendererResource();
     24 
     25   // Resource methods:
     26   virtual base::string16 GetProfileName() const OVERRIDE;
     27   virtual base::ProcessHandle GetProcess() const OVERRIDE;
     28   virtual int GetUniqueChildProcessId() const OVERRIDE;
     29   virtual Type GetType() const OVERRIDE;
     30   virtual int GetRoutingID() const OVERRIDE;
     31 
     32   virtual bool ReportsCacheStats() const OVERRIDE;
     33   virtual blink::WebCache::ResourceTypeStats GetWebCoreCacheStats() const
     34       OVERRIDE;
     35   virtual bool ReportsV8MemoryStats() const OVERRIDE;
     36   virtual size_t GetV8MemoryAllocated() const OVERRIDE;
     37   virtual size_t GetV8MemoryUsed() const OVERRIDE;
     38 
     39   // RenderResources always provide the network usage.
     40   virtual bool SupportNetworkUsage() const OVERRIDE;
     41   virtual void SetSupportNetworkUsage() OVERRIDE { }
     42 
     43   virtual void Refresh() OVERRIDE;
     44 
     45   virtual void NotifyResourceTypeStats(
     46       const blink::WebCache::ResourceTypeStats& stats) OVERRIDE;
     47 
     48   virtual void NotifyV8HeapStats(size_t v8_memory_allocated,
     49                                  size_t v8_memory_used) OVERRIDE;
     50 
     51   content::RenderViewHost* render_view_host() const {
     52     return render_view_host_;
     53   }
     54 
     55  private:
     56   base::ProcessHandle process_;
     57   int pid_;
     58   int unique_process_id_;
     59 
     60   // RenderViewHost we use to fetch stats.
     61   content::RenderViewHost* render_view_host_;
     62   // The stats_ field holds information about resource usage in the renderer
     63   // process and so it is updated asynchronously by the Refresh() call.
     64   blink::WebCache::ResourceTypeStats stats_;
     65   // This flag is true if we are waiting for the renderer to report its stats.
     66   bool pending_stats_update_;
     67 
     68   // We do a similar dance to gather the V8 memory usage in a process.
     69   size_t v8_memory_allocated_;
     70   size_t v8_memory_used_;
     71   bool pending_v8_memory_allocated_update_;
     72 
     73   DISALLOW_COPY_AND_ASSIGN(RendererResource);
     74 };
     75 
     76 }  // namespace task_manager
     77 
     78 #endif  // CHROME_BROWSER_TASK_MANAGER_RENDERER_RESOURCE_H_
     79