ppapi/proxy/plugin_resource_tracker.cc

   1 // Copyright (c) 2012 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 #include "ppapi/proxy/plugin_resource_tracker.h"
   6
   7 #include "base/logging.h"
   8 #include "base/memory/singleton.h"
   9 #include "ppapi/proxy/plugin_dispatcher.h"
  10 #include "ppapi/proxy/plugin_globals.h"
  11 #include "ppapi/proxy/ppapi_messages.h"
  12 #include "ppapi/proxy/serialized_var.h"
  13 #include "ppapi/shared_impl/proxy_lock.h"
  14 #include "ppapi/shared_impl/resource.h"
  15 #include "ppapi/shared_impl/var.h"
  16
  17 namespace ppapi {
  18 namespace proxy {
  19
  20 PluginResourceTracker::PluginResourceTracker() : ResourceTracker(THREAD_SAFE) {
  21   UseOddResourceValueInDebugMode();
  22 }
  23
  24 PluginResourceTracker::~PluginResourceTracker() {
  25 }
  26
  27 PP_Resource PluginResourceTracker::PluginResourceForHostResource(
  28     const HostResource& resource) const {
  29   HostResourceMap::const_iterator found = host_resource_map_.find(resource);
  30   if (found == host_resource_map_.end())
  31     return 0;
  32   return found->second;
  33 }
  34
  35 void PluginResourceTracker::AbandonResource(PP_Resource res) {
  36   DCHECK(GetResource(res));
  37   bool inserted = abandoned_resources_.insert(res).second;
  38   DCHECK(inserted);
  39
  40   ReleaseResource(res);
  41 }
  42
  43 PP_Resource PluginResourceTracker::AddResource(Resource* object) {
  44   // If there's a HostResource, it must not be added twice.
  45   DCHECK(!object->host_resource().host_resource() ||
  46          (host_resource_map_.find(object->host_resource()) ==
  47           host_resource_map_.end()));
  48
  49   PP_Resource ret = ResourceTracker::AddResource(object);
  50
  51   // Some resources are plugin-only, so they don't have a host resource.
  52   if (object->host_resource().host_resource())
  53     host_resource_map_.insert(std::make_pair(object->host_resource(), ret));
  54   return ret;
  55 }
  56
  57 void PluginResourceTracker::RemoveResource(Resource* object) {
  58   ResourceTracker::RemoveResource(object);
  59
  60   if (!object->host_resource().is_null()) {
  61     // The host_resource will be NULL for proxy-only resources, which we
  62     // obviously don't need to tell the host about.
  63     DCHECK(host_resource_map_.find(object->host_resource()) !=
  64            host_resource_map_.end());
  65     host_resource_map_.erase(object->host_resource());
  66
  67     bool abandoned = false;
  68     auto it = abandoned_resources_.find(object->pp_resource());
  69     if (it != abandoned_resources_.end()) {
  70       abandoned = true;
  71       abandoned_resources_.erase(it);
  72     }
  73
  74     PluginDispatcher* dispatcher =
  75         PluginDispatcher::GetForInstance(object->pp_instance());
  76     if (dispatcher && !abandoned) {
  77       // The dispatcher can be NULL if the plugin held on to a resource after
  78       // the instance was destroyed. In that case the browser-side resource has
  79       // already been freed correctly on the browser side.
  80       dispatcher->Send(new PpapiHostMsg_PPBCore_ReleaseResource(
  81           API_ID_PPB_CORE, object->host_resource()));
  82     }
  83   }
  84 }
  85
  86 }  // namespace proxy
  87 }  // namespace ppapi