Initial audio implementation.

chrome/browser/ppapi_plugin_process_host.cc

 // Copyright (c) 2010 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 "chrome/browser/ppapi_plugin_process_host.h"
 
 #include "base/command_line.h"
 #include "base/file_path.h"
 #include "base/process_util.h"
 #include "chrome/browser/renderer_host/resource_message_filter.h"
@@ skipping 11 matching lines @@
 
 PpapiPluginProcessHost::~PpapiPluginProcessHost() {
 }
 
 void PpapiPluginProcessHost::Init(const FilePath& path,
                                   IPC::Message* reply_msg) {
   plugin_path_ = path;
   reply_msg_.reset(reply_msg);
 
   if (!CreateChannel()) {
-    ReplyToRenderer(IPC::ChannelHandle());
+    ReplyToRenderer(NULL, IPC::ChannelHandle());
     return;
   }
 
   const CommandLine& browser_command_line = *CommandLine::ForCurrentProcess();
   CommandLine::StringType plugin_launcher =
       browser_command_line.GetSwitchValueNative(switches::kPpapiPluginLauncher);
 
   FilePath exe_path = ChildProcessHost::GetChildPath(plugin_launcher.empty());
   if (exe_path.empty()) {
-    ReplyToRenderer(IPC::ChannelHandle());
+    ReplyToRenderer(NULL, IPC::ChannelHandle());
     return;
   }
 
   CommandLine* cmd_line = new CommandLine(exe_path);
   cmd_line->AppendSwitchASCII(switches::kProcessType,
                               switches::kPpapiPluginProcess);
   cmd_line->AppendSwitchASCII(switches::kProcessChannelID, channel_id());
 
   if (!plugin_launcher.empty())
     cmd_line->PrependWrapper(plugin_launcher);
@@ skipping 19 matching lines @@
   return NULL;
 }
 
 void PpapiPluginProcessHost::OnMessageReceived(const IPC::Message& msg) {
   IPC_BEGIN_MESSAGE_MAP(PpapiPluginProcessHost, msg)
     IPC_MESSAGE_HANDLER(PpapiHostMsg_PluginLoaded, OnPluginLoaded)
     IPC_MESSAGE_UNHANDLED_ERROR();
   IPC_END_MESSAGE_MAP()
 }
 
 void PpapiPluginProcessHost::OnChannelConnected(int32 peer_pid) {

[brettw, 2010/12/01 00:23:05]

The changes in this component are to support sending the renderer handle to the
plugin, and the plugin handle to the renderer.

-  PpapiMsg_LoadPlugin* msg = new PpapiMsg_LoadPlugin(plugin_path_,
+#if defined(OS_WIN)
+  base::ProcessHandle plugins_renderer_handle = NULL;
+  ::DuplicateHandle(::GetCurrentProcess(), filter_->handle(),
+                    GetChildProcessHandle(), &plugins_renderer_handle,
+                    0, FALSE, DUPLICATE_SAME_ACCESS);
+#elif defined(OS_POSIX)
+  base::ProcessHandle plugins_renderer_handle = filter_->handle();
+#endif
+
+  PpapiMsg_LoadPlugin* msg = new PpapiMsg_LoadPlugin(plugins_renderer_handle,
+                                                     plugin_path_,
                                                      filter_->id());
   if (!Send(msg))  // Just send an empty handle on failure.
-    ReplyToRenderer(IPC::ChannelHandle());
+    ReplyToRenderer(NULL, IPC::ChannelHandle());
   // This function will result in OnChannelCreated getting called to finish.
 }
 
 void PpapiPluginProcessHost::OnChannelError() {
   if (reply_msg_.get())
-    ReplyToRenderer(IPC::ChannelHandle());
+    ReplyToRenderer(NULL, IPC::ChannelHandle());
 }
 
-void PpapiPluginProcessHost::OnPluginLoaded(const IPC::ChannelHandle& handle) {
-  ReplyToRenderer(handle);
+void PpapiPluginProcessHost::OnPluginLoaded(
+    const IPC::ChannelHandle& channel_handle) {
+  base::ProcessHandle plugin_process = GetChildProcessHandle();
+#if defined(OS_WIN)
+  base::ProcessHandle renderers_plugin_handle = NULL;
+  ::DuplicateHandle(::GetCurrentProcess(), plugin_process,
+                    filter_->handle(), &renderers_plugin_handle,
+                    0, FALSE, DUPLICATE_SAME_ACCESS);
+#elif defined(OS_POSIX)
+  // Don't need to duplicate anything on POSIX since it's just a PID.
+  base::ProcessHandle renderers_plugin_handle = plugin_process;
+#endif
+  ReplyToRenderer(renderers_plugin_handle, channel_handle);
 }
 
-void PpapiPluginProcessHost::ReplyToRenderer(const IPC::ChannelHandle& handle) {
+void PpapiPluginProcessHost::ReplyToRenderer(
+    base::ProcessHandle plugin_handle,
+    const IPC::ChannelHandle& channel_handle) {
   DCHECK(reply_msg_.get());
   ViewHostMsg_OpenChannelToPepperPlugin::WriteReplyParams(reply_msg_.get(),
-      handle);
+                                                          plugin_handle,
+                                                          channel_handle);
   filter_->Send(reply_msg_.release());
 }