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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #ifndef WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ | 5 #ifndef WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ |
| 6 #define WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ | 6 #define WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ |
| 7 | 7 |
| 8 #include <map> | 8 #include <map> |
| 9 #include <set> | 9 #include <set> |
| 10 #include <utility> | 10 #include <utility> |
| (...skipping 18 matching lines...) Expand all Loading... |
| 29 namespace ppapi { | 29 namespace ppapi { |
| 30 class NPObjectVar; | 30 class NPObjectVar; |
| 31 class Var; | 31 class Var; |
| 32 } | 32 } |
| 33 | 33 |
| 34 namespace webkit { | 34 namespace webkit { |
| 35 namespace ppapi { | 35 namespace ppapi { |
| 36 | 36 |
| 37 class PluginInstance; | 37 class PluginInstance; |
| 38 class PluginModule; | 38 class PluginModule; |
| 39 class Resource; | |
| 40 class ResourceTrackerTest; | 39 class ResourceTrackerTest; |
| 41 | 40 |
| 42 // This class maintains a global list of all live pepper resources. It allows | 41 // This class maintains a global list of all live pepper resources. It allows |
| 43 // us to check resource ID validity and to map them to a specific module. | 42 // us to check resource ID validity and to map them to a specific module. |
| 44 // | 43 // |
| 45 // This object is NOT threadsafe. | 44 // This object is NOT threadsafe. |
| 46 class ResourceTracker : public ::ppapi::TrackerBase, | 45 class ResourceTracker : public ::ppapi::TrackerBase, |
| 47 public ::ppapi::ResourceTracker { | 46 public ::ppapi::ResourceTracker { |
| 48 public: | 47 public: |
| 49 // Returns the pointer to the singleton object. | 48 // Returns the pointer to the singleton object. |
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| 102 void InstanceDeleted(PP_Instance instance); | 101 void InstanceDeleted(PP_Instance instance); |
| 103 | 102 |
| 104 void InstanceCrashed(PP_Instance instance); | 103 void InstanceCrashed(PP_Instance instance); |
| 105 | 104 |
| 106 // Returns a pointer to the plugin instance object associated with the given | 105 // Returns a pointer to the plugin instance object associated with the given |
| 107 // instance handle. The return value will be NULL if the handle is invalid or | 106 // instance handle. The return value will be NULL if the handle is invalid or |
| 108 // if the instance has crashed. | 107 // if the instance has crashed. |
| 109 PluginInstance* GetInstance(PP_Instance instance); | 108 PluginInstance* GetInstance(PP_Instance instance); |
| 110 | 109 |
| 111 private: | 110 private: |
| 112 friend class Resource; | |
| 113 friend class ResourceTrackerTest; | 111 friend class ResourceTrackerTest; |
| 114 | 112 |
| 115 typedef std::set<PP_Resource> ResourceSet; | 113 typedef std::set<PP_Resource> ResourceSet; |
| 116 | 114 |
| 117 // Per-instance data we track. | 115 // Per-instance data we track. |
| 118 struct InstanceData; | 116 struct InstanceData; |
| 119 | 117 |
| 120 // Prohibit creation other then by the Singleton class. | 118 // Prohibit creation other then by the Singleton class. |
| 121 ResourceTracker(); | 119 ResourceTracker(); |
| 122 virtual ~ResourceTracker(); | 120 virtual ~ResourceTracker(); |
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| 148 // layer via the delegate, which may be in a random state of shutdown. | 146 // layer via the delegate, which may be in a random state of shutdown. |
| 149 // | 147 // |
| 150 // So effectively our rule is: any resources still around at shutdown are | 148 // So effectively our rule is: any resources still around at shutdown are |
| 151 // associated with leaked plugins in WebKit, so it's also OK to leak those | 149 // associated with leaked plugins in WebKit, so it's also OK to leak those |
| 152 // resources from here (avoiding the shutdown race). | 150 // resources from here (avoiding the shutdown race). |
| 153 static ResourceTracker* global_tracker_; | 151 static ResourceTracker* global_tracker_; |
| 154 | 152 |
| 155 // See SetSingletonOverride above. | 153 // See SetSingletonOverride above. |
| 156 static ResourceTracker* singleton_override_; | 154 static ResourceTracker* singleton_override_; |
| 157 | 155 |
| 158 // Last assigned resource ID. | |
| 159 PP_Resource last_resource_id_; | |
| 160 | |
| 161 ::ppapi::VarTracker var_tracker_; | 156 ::ppapi::VarTracker var_tracker_; |
| 162 | 157 |
| 163 // For each PP_Resource, keep the Resource* (as refptr) and plugin use count. | |
| 164 // This use count is different then Resource's RefCount, and is manipulated | |
| 165 // using this AddRefResource/UnrefResource. When it drops to zero, we just | |
| 166 // remove the resource from this resource tracker, but the resource object | |
| 167 // will be alive so long as some scoped_refptr still holds it's | |
| 168 // reference. This prevents plugins from forcing destruction of Resource | |
| 169 // objects. | |
| 170 typedef std::pair<scoped_refptr<Resource>, size_t> ResourceAndRefCount; | |
| 171 typedef base::hash_map<PP_Resource, ResourceAndRefCount> ResourceMap; | |
| 172 ResourceMap live_resources_; | |
| 173 | |
| 174 // Like ResourceAndRefCount but for vars, which are associated with modules. | 158 // Like ResourceAndRefCount but for vars, which are associated with modules. |
| 175 typedef std::pair<scoped_refptr< ::ppapi::Var>, size_t> VarAndRefCount; | 159 typedef std::pair<scoped_refptr< ::ppapi::Var>, size_t> VarAndRefCount; |
| 176 typedef base::hash_map<int32, VarAndRefCount> VarMap; | 160 typedef base::hash_map<int32, VarAndRefCount> VarMap; |
| 177 VarMap live_vars_; | 161 VarMap live_vars_; |
| 178 | 162 |
| 179 // Tracks all live instances and their associated data. | 163 // Tracks all live instances and their associated data. |
| 180 typedef std::map<PP_Instance, linked_ptr<InstanceData> > InstanceMap; | 164 typedef std::map<PP_Instance, linked_ptr<InstanceData> > InstanceMap; |
| 181 InstanceMap instance_map_; | 165 InstanceMap instance_map_; |
| 182 | 166 |
| 183 // Tracks all live modules. The pointers are non-owning, the PluginModule | 167 // Tracks all live modules. The pointers are non-owning, the PluginModule |
| 184 // destructor will notify us when the module is deleted. | 168 // destructor will notify us when the module is deleted. |
| 185 typedef std::map<PP_Module, PluginModule*> ModuleMap; | 169 typedef std::map<PP_Module, PluginModule*> ModuleMap; |
| 186 ModuleMap module_map_; | 170 ModuleMap module_map_; |
| 187 | 171 |
| 188 DISALLOW_COPY_AND_ASSIGN(ResourceTracker); | 172 DISALLOW_COPY_AND_ASSIGN(ResourceTracker); |
| 189 }; | 173 }; |
| 190 | 174 |
| 191 } // namespace ppapi | 175 } // namespace ppapi |
| 192 } // namespace webkit | 176 } // namespace webkit |
| 193 | 177 |
| 194 #endif // WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ | 178 #endif // WEBKIT_PLUGINS_PPAPI_RESOURCE_TRACKER_H_ |
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