chrome/browser/task_manager/resource_provider.h

   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_RESOURCE_PROVIDER_H_
   6 #define CHROME_BROWSER_TASK_MANAGER_RESOURCE_PROVIDER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/ref_counted.h"
  10 #include "base/process/process_handle.h"
  11 #include "base/strings/string16.h"
  12 #include "third_party/WebKit/public/web/WebCache.h"
  13
  14 class PrefRegistrySimple;
  15 class TaskManagerModel;
  16
  17 namespace content {
  18 class WebContents;
  19 }
  20
  21 namespace extensions {
  22 class Extension;
  23 }
  24
  25 namespace gfx {
  26 class ImageSkia;
  27 }
  28
  29 namespace task_manager {
  30
  31 #define TASKMANAGER_RESOURCE_TYPE_LIST(def) \
  32     def(BROWSER)         /* The main browser process. */ \
  33     def(RENDERER)        /* A normal WebContents renderer process. */ \
  34     def(EXTENSION)       /* An extension or app process. */ \
  35     def(NOTIFICATION)    /* A notification process. */ \
  36     def(GUEST)           /* A browser plugin guest process. */ \
  37     def(PLUGIN)          /* A plugin process. */ \
  38     def(WORKER)          /* A web worker process. */ \
  39     def(NACL)            /* A NativeClient loader or broker process. */ \
  40     def(UTILITY)         /* A browser utility process. */ \
  41     def(ZYGOTE)          /* A Linux zygote process. */ \
  42     def(SANDBOX_HELPER)  /* A sandbox helper process. */ \
  43     def(GPU)             /* A graphics process. */
  44
  45 #define TASKMANAGER_RESOURCE_TYPE_LIST_ENUM(a)   a,
  46 #define TASKMANAGER_RESOURCE_TYPE_LIST_AS_STRING(a)   case a: return #a;
  47
  48 // A resource represents one row in the task manager.
  49 // Resources from similar processes are grouped together by the task manager.
  50 class Resource {
  51  public:
  52   virtual ~Resource() {}
  53
  54   enum Type {
  55     UNKNOWN = 0,
  56     TASKMANAGER_RESOURCE_TYPE_LIST(TASKMANAGER_RESOURCE_TYPE_LIST_ENUM)
  57   };
  58
  59   virtual base::string16 GetTitle() const = 0;
  60   virtual base::string16 GetProfileName() const = 0;
  61   virtual gfx::ImageSkia GetIcon() const = 0;
  62   virtual base::ProcessHandle GetProcess() const = 0;
  63   virtual int GetUniqueChildProcessId() const = 0;
  64   virtual Type GetType() const = 0;
  65   virtual int GetRoutingID() const;
  66
  67   virtual bool ReportsCacheStats() const;
  68   virtual blink::WebCache::ResourceTypeStats GetWebCoreCacheStats() const;
  69
  70   virtual bool ReportsSqliteMemoryUsed() const;
  71   virtual size_t SqliteMemoryUsedBytes() const;
  72
  73   virtual bool ReportsV8MemoryStats() const;
  74   virtual size_t GetV8MemoryAllocated() const;
  75   virtual size_t GetV8MemoryUsed() const;
  76
  77   // A helper function for ActivateProcess when selected resource refers
  78   // to a Tab or other window containing web contents.  Returns NULL by
  79   // default because not all resources have an associated web contents.
  80   virtual content::WebContents* GetWebContents() const;
  81
  82   // Whether this resource does report the network usage accurately.
  83   // This controls whether 0 or N/A is displayed when no bytes have been
  84   // reported as being read. This is because some plugins do not report the
  85   // bytes read and we don't want to display a misleading 0 value in that
  86   // case.
  87   virtual bool SupportNetworkUsage() const = 0;
  88
  89   // Called when some bytes have been read and support_network_usage returns
  90   // false (meaning we do have network usage support).
  91   virtual void SetSupportNetworkUsage() = 0;
  92
  93   // The TaskManagerModel periodically refreshes its data and call this
  94   // on all live resources.
  95   virtual void Refresh() {}
  96
  97   static const char* GetResourceTypeAsString(const Type type) {
  98     switch (type) {
  99       TASKMANAGER_RESOURCE_TYPE_LIST(TASKMANAGER_RESOURCE_TYPE_LIST_AS_STRING)
 100       default: return "UNKNOWN";
 101     }
 102   }
 103
 104  protected:
 105   Resource() {}
 106
 107  private:
 108   DISALLOW_COPY_AND_ASSIGN(Resource);
 109 };
 110
 111 #undef TASKMANAGER_RESOURCE_TYPE_LIST
 112 #undef TASKMANAGER_RESOURCE_TYPE_LIST_ENUM
 113 #undef TASKMANAGER_RESOURCE_TYPE_LIST_AS_STRING
 114
 115 // ResourceProviders are responsible for adding/removing resources to the task
 116 // manager. The task manager notifies the ResourceProvider that it is ready
 117 // to receive resource creation/termination notifications with a call to
 118 // StartUpdating(). At that point, the resource provider should call
 119 // AddResource with all the existing resources, and after that it should call
 120 // AddResource/RemoveResource as resources are created/terminated.
 121 // The provider remains the owner of the resource objects and is responsible
 122 // for deleting them (when StopUpdating() is called).
 123 // After StopUpdating() is called the provider should also stop reporting
 124 // notifications to the task manager.
 125 // Note: ResourceProviders have to be ref counted as they are used in
 126 // MessageLoop::InvokeLater().
 127 class ResourceProvider : public base::RefCountedThreadSafe<ResourceProvider> {
 128  public:
 129   // Should return the resource associated to the specified ids, or NULL if
 130   // the resource does not belong to this provider.
 131   virtual Resource* GetResource(int origin_pid,
 132                                 int child_id,
 133                                 int route_id) = 0;
 134   virtual void StartUpdating() = 0;
 135   virtual void StopUpdating() = 0;
 136
 137  protected:
 138   friend class base::RefCountedThreadSafe<ResourceProvider>;
 139
 140   virtual ~ResourceProvider() {}
 141 };
 142
 143 }  // namespace task_manager
 144
 145 #endif  // CHROME_BROWSER_TASK_MANAGER_RESOURCE_PROVIDER_H_