Introduce PPB_Flash_MessageLoop interface for Pepper Flash.

ppapi/proxy/ppb_flash_message_loop_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_flash_message_loop_proxy.h"
+
+#include "base/bind.h"
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/private/ppb_flash_message_loop.h"
+#include "ppapi/proxy/enter_proxy.h"
+#include "ppapi/proxy/plugin_dispatcher.h"
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/resource.h"
+#include "ppapi/thunk/enter.h"
+#include "ppapi/thunk/ppb_flash_message_loop_api.h"
+#include "ppapi/thunk/resource_creation_api.h"
+
+using ppapi::thunk::PPB_Flash_MessageLoop_API;
+
+namespace ppapi {
+namespace proxy {
+namespace {
+
+class FlashMessageLoop : public PPB_Flash_MessageLoop_API, public Resource {
+ public:
+  explicit FlashMessageLoop(const HostResource& resource);
+  virtual ~FlashMessageLoop();
+
+  // Resource overrides.
+  virtual PPB_Flash_MessageLoop_API* AsPPB_Flash_MessageLoop_API() OVERRIDE;
+
+  // PPB_Flash_MesssageLoop_API implementation.
+  virtual int32_t Run() OVERRIDE;
+  virtual void Quit() OVERRIDE;
+  virtual void RunFromHostProxy(
+      const RunFromHostProxyCallback& callback) OVERRIDE;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(FlashMessageLoop);
+};
+
+FlashMessageLoop::FlashMessageLoop(const HostResource& resource)
+    : Resource(resource) {
+}
+
+FlashMessageLoop::~FlashMessageLoop() {
+}
+
+PPB_Flash_MessageLoop_API* FlashMessageLoop::AsPPB_Flash_MessageLoop_API() {
+  return this;
+}
+
+int32_t FlashMessageLoop::Run() {
+  int32_t result = PP_ERROR_FAILED;
+  IPC::SyncMessage* msg = new PpapiHostMsg_PPBFlashMessageLoop_Run(
+      API_ID_PPB_FLASH_MESSAGELOOP, host_resource(), &result);
+  msg->EnableMessagePumping();
+  PluginDispatcher::GetForResource(this)->Send(msg);
+  return result;
+}
+
+void FlashMessageLoop::Quit() {
+  PluginDispatcher::GetForResource(this)->Send(
+      new PpapiHostMsg_PPBFlashMessageLoop_Quit(
+          API_ID_PPB_FLASH_MESSAGELOOP, host_resource()));
+}
+
+void FlashMessageLoop::RunFromHostProxy(
+    const RunFromHostProxyCallback& callback) {
+  // This should never be called on the plugin side.
+  NOTREACHED();
+}
+
+}  // namespace
+
+PPB_Flash_MessageLoop_Proxy::PPB_Flash_MessageLoop_Proxy(Dispatcher* dispatcher)
+    : InterfaceProxy(dispatcher) {
+}
+
+PPB_Flash_MessageLoop_Proxy::~PPB_Flash_MessageLoop_Proxy() {
+}
+
+// static
+PP_Resource PPB_Flash_MessageLoop_Proxy::CreateProxyResource(
+    PP_Instance instance) {
+  PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
+  if (!dispatcher)
+    return 0;
+
+  HostResource result;
+  dispatcher->Send(new PpapiHostMsg_PPBFlashMessageLoop_Create(
+      API_ID_PPB_FLASH_MESSAGELOOP, instance, &result));
+  if (result.is_null())
+    return 0;
+  return (new FlashMessageLoop(result))->GetReference();
+}
+
+bool PPB_Flash_MessageLoop_Proxy::OnMessageReceived(const IPC::Message& msg) {
+  bool handled = true;
+  IPC_BEGIN_MESSAGE_MAP(PPB_Flash_MessageLoop_Proxy, msg)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFlashMessageLoop_Create,
+                        OnMsgCreate)
+    // We cannot use IPC_MESSAGE_HANDLER here. Because it tries to send the sync
+    // message reply after the handler returns. However, in this case, the
+    // PPB_Flash_MessageLoop_Proxy object may be destroyed before the handler
+    // returns.
+    IPC_MESSAGE_HANDLER_DELAY_REPLY(PpapiHostMsg_PPBFlashMessageLoop_Run,
+                                    OnMsgRun)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBFlashMessageLoop_Quit,
+                        OnMsgQuit)
+    IPC_MESSAGE_UNHANDLED(handled = false)
+  IPC_END_MESSAGE_MAP()
+  return handled;
+}
+
+void PPB_Flash_MessageLoop_Proxy::OnMsgCreate(PP_Instance instance,
+                                              HostResource* result) {
+  thunk::EnterResourceCreation enter(instance);
+  if (enter.succeeded()) {
+    result->SetHostResource(
+        instance, enter.functions()->CreateFlashMessageLoop(instance));
+  }
+}
+
+void PPB_Flash_MessageLoop_Proxy::OnMsgRun(
+    const HostResource& flash_message_loop,
+    IPC::Message* reply) {
+  PPB_Flash_MessageLoop_API::RunFromHostProxyCallback callback =
+      base::Bind(&PPB_Flash_MessageLoop_Proxy::WillQuitSoon, AsWeakPtr(),
+                 base::Passed(scoped_ptr<IPC::Message>(reply)));
+
+  EnterHostFromHostResource<PPB_Flash_MessageLoop_API>
+      enter(flash_message_loop);
+  if (enter.succeeded())
+    enter.object()->RunFromHostProxy(callback);
+  else
+    callback.Run(PP_ERROR_BADRESOURCE);
+}
+
+void PPB_Flash_MessageLoop_Proxy::OnMsgQuit(
+    const ppapi::HostResource& flash_message_loop) {
+  EnterHostFromHostResource<PPB_Flash_MessageLoop_API>
+      enter(flash_message_loop);
+  if (enter.succeeded())
+    enter.object()->Quit();
+}
+
+void PPB_Flash_MessageLoop_Proxy::WillQuitSoon(
+    scoped_ptr<IPC::Message> reply_message,
+    int32_t result) {
+  PpapiHostMsg_PPBFlashMessageLoop_Run::WriteReplyParams(reply_message.get(),
+                                                         result);
+  Send(reply_message.release());
+}
+
+}  // namespace proxy
+}  // namespace ppapi