content/browser/mojo/mojo_application_host.cc

   1 // Copyright 2014 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 "content/browser/mojo/mojo_application_host.h"
   6
   7 #include "content/common/mojo/mojo_messages.h"
   8 #include "content/public/browser/browser_thread.h"
   9 #include "ipc/ipc_sender.h"
  10 #include "mojo/embedder/platform_channel_pair.h"
  11
  12 namespace content {
  13 namespace {
  14
  15 base::PlatformFile PlatformFileFromScopedPlatformHandle(
  16     mojo::embedder::ScopedPlatformHandle handle) {
  17 #if defined(OS_POSIX)
  18   return handle.release().fd;
  19 #elif defined(OS_WIN)
  20   return handle.release().handle;
  21 #endif
  22 }
  23
  24 }  // namespace
  25
  26 MojoApplicationHost::MojoApplicationHost() : did_activate_(false) {
  27 }
  28
  29 MojoApplicationHost::~MojoApplicationHost() {
  30 }
  31
  32 bool MojoApplicationHost::Init() {
  33   DCHECK(!client_handle_.is_valid()) << "Already initialized!";
  34
  35   mojo::embedder::PlatformChannelPair channel_pair;
  36
  37   mojo::ScopedMessagePipeHandle message_pipe = channel_init_.Init(
  38       PlatformFileFromScopedPlatformHandle(channel_pair.PassServerHandle()),
  39       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
  40   if (!message_pipe.is_valid())
  41     return false;
  42
  43   // Forward this to the client once we know its process handle.
  44   client_handle_ = channel_pair.PassClientHandle();
  45
  46   service_registry_.BindRemoteServiceProvider(message_pipe.Pass());
  47   return true;
  48 }
  49
  50 bool MojoApplicationHost::Activate(IPC::Sender* sender,
  51                                    base::ProcessHandle process_handle) {
  52   DCHECK(!did_activate_);
  53   DCHECK(client_handle_.is_valid());
  54
  55   base::PlatformFile client_file =
  56       PlatformFileFromScopedPlatformHandle(client_handle_.Pass());
  57   did_activate_ = sender->Send(new MojoMsg_Activate(
  58       IPC::GetFileHandleForProcess(client_file, process_handle, true)));
  59   return did_activate_;
  60 }
  61
  62 void MojoApplicationHost::WillDestroySoon() {
  63   channel_init_.WillDestroySoon();
  64 }
  65
  66 }  // namespace content