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/edk/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 #if defined(OS_ANDROID)
  28   service_registry_android_.reset(
  29       new ServiceRegistryAndroid(&service_registry_));
  30 #endif
  31 }
  32
  33 MojoApplicationHost::~MojoApplicationHost() {
  34 }
  35
  36 bool MojoApplicationHost::Init() {
  37   DCHECK(!client_handle_.is_valid()) << "Already initialized!";
  38
  39   mojo::embedder::PlatformChannelPair channel_pair;
  40
  41   mojo::ScopedMessagePipeHandle message_pipe = channel_init_.Init(
  42       PlatformFileFromScopedPlatformHandle(channel_pair.PassServerHandle()),
  43       BrowserThread::GetMessageLoopProxyForThread(BrowserThread::IO));
  44   if (!message_pipe.is_valid())
  45     return false;
  46
  47   // Forward this to the client once we know its process handle.
  48   client_handle_ = channel_pair.PassClientHandle();
  49
  50   service_registry_.BindRemoteServiceProvider(message_pipe.Pass());
  51   return true;
  52 }
  53
  54 void MojoApplicationHost::Activate(IPC::Sender* sender,
  55                                    base::ProcessHandle process_handle) {
  56   DCHECK(!did_activate_);
  57   DCHECK(client_handle_.is_valid());
  58
  59   base::PlatformFile client_file =
  60       PlatformFileFromScopedPlatformHandle(client_handle_.Pass());
  61   did_activate_ = sender->Send(new MojoMsg_Activate(
  62       IPC::GetFileHandleForProcess(client_file, process_handle, true)));
  63 }
  64
  65 void MojoApplicationHost::WillDestroySoon() {
  66   channel_init_.WillDestroySoon();
  67 }
  68
  69 }  // namespace content