Out-of-process implementation of the PPB_NetworkMonitor_Private interface.

ppapi/proxy/ppb_network_monitor_private_proxy.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/proxy/ppb_network_monitor_private_proxy.h"
+
+#include "ppapi/proxy/enter_proxy.h"
+#include "ppapi/proxy/plugin_proxy_delegate.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/thunk/ppb_network_monitor_private_api.h"
+
+namespace ppapi {
+namespace proxy {
+
+class PPB_NetworkMonitor_Private_Proxy::NetworkMonitor
+    : public Resource,
+      public thunk::PPB_NetworkMonitor_Private_API,
+      public base::SupportsWeakPtr<
+          PPB_NetworkMonitor_Private_Proxy::NetworkMonitor> {
+ public:
+  NetworkMonitor(PP_Instance instance,
+                 PPB_NetworkMonitor_Private_Proxy* proxy,
+                 PPB_NetworkMonitor_Callback callback,
+                 void* user_data)
+      : Resource(OBJECT_IS_PROXY, instance),
+        proxy_(proxy),
+        callback_(callback),
+        user_data_(user_data) {
+  }
+
+  virtual ~NetworkMonitor() {
+    proxy_->OnNetworkMonitorDeleted(this, pp_instance());
+  }
+
+
+  // Resource overrides.
+  virtual ppapi::thunk::PPB_NetworkMonitor_Private_API*
+  AsPPB_NetworkMonitor_Private_API() OVERRIDE {
+    return this;
+  }
+
+  void OnNetworkListReceived(const scoped_refptr<NetworkListStorage>& list) {
+    PP_Resource list_resource =
+        PPB_NetworkList_Private_Shared::Create(
+            OBJECT_IS_PROXY, pp_instance(), list);
+    CallWhileUnlocked(callback_, user_data_, list_resource);
+  }
+
+ private:
+  PPB_NetworkMonitor_Private_Proxy* proxy_;
+  PPB_NetworkMonitor_Callback callback_;
+  void* user_data_;
+
+  DISALLOW_COPY_AND_ASSIGN(NetworkMonitor);
+};
+
+PPB_NetworkMonitor_Private_Proxy::PPB_NetworkMonitor_Private_Proxy(
+    Dispatcher* dispatcher)
+    : InterfaceProxy(dispatcher),
+      monitors_(new ObserverListThreadSafe<NetworkMonitor>()),
+      monitors_count_(0) {
+}
+
+PPB_NetworkMonitor_Private_Proxy::~PPB_NetworkMonitor_Private_Proxy() {
+  monitors_->AssertEmpty();
+}
+
+// static
+PP_Resource PPB_NetworkMonitor_Private_Proxy::CreateProxyResource(
+    PP_Instance instance,
+    PPB_NetworkMonitor_Callback callback,
+    void* user_data) {
+  if (!callback)
+    return 0;
+
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return 0;
+  PPB_NetworkMonitor_Private_Proxy* proxy =
+      static_cast<PPB_NetworkMonitor_Private_Proxy*>(
+          dispatcher->GetInterfaceProxy(kApiID));
+  if (!proxy)
+    return 0;
+
+  scoped_ptr<NetworkMonitor> result(
+      new NetworkMonitor(instance, proxy, callback, user_data));
+  proxy->monitors_->AddObserver(result.get());
+
+  proxy->monitors_count_++;
+  if (proxy->monitors_count_ == 1) {
+    // If that is the first network monitor then send Start message.
+    PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
+        new PpapiHostMsg_PPBNetworkMonitor_Start(
+            dispatcher->plugin_dispatcher_id()));
+
+    // We could have received network list message after sending the
+    // previous Stop message. This list is stale now, so reset it
+    // here.
+    proxy->current_list_ = NULL;
+  } else if (proxy->current_list_.get()) {
+    MessageLoop::current()->PostTask(FROM_HERE, base::Bind(
+        &NetworkMonitor::OnNetworkListReceived,
+        result->AsWeakPtr(), proxy->current_list_));
+  }
+
+  return result.release()->GetReference();
+}
+
+bool PPB_NetworkMonitor_Private_Proxy::OnMessageReceived(
+    const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PPB_NetworkMonitor_Private_Proxy, msg)
+    IPC_MESSAGE_HANDLER(PpapiMsg_PPBNetworkMonitor_NetworkList,
+                        OnPluginMsgNetworkList)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PPB_NetworkMonitor_Private_Proxy::OnPluginMsgNetworkList(
+    uint32 plugin_dispatcher_id,
+    const ppapi::NetworkList& list) {
+  scoped_refptr<NetworkListStorage> list_storage(new NetworkListStorage(list));
+  current_list_ = list_storage;
+  monitors_->Notify(&NetworkMonitor::OnNetworkListReceived, list_storage);
+}
+
+void PPB_NetworkMonitor_Private_Proxy::OnNetworkMonitorDeleted(
+    NetworkMonitor* monitor,
+    PP_Instance instance) {
+  monitors_->RemoveObserver(monitor);
+  monitors_count_--;
+  if (monitors_count_ == 0) {
+    // Send Stop message if that was the last NetworkMonitor.
+    PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+    if (dispatcher) {
+      PluginGlobals::Get()->plugin_proxy_delegate()->SendToBrowser(
+          new PpapiHostMsg_PPBNetworkMonitor_Stop(
+              dispatcher->plugin_dispatcher_id()));
+    }
+    current_list_ = NULL;
+  }
+}
+
+}  // namespace proxy
+}  // namespace ppapi