mojo/embedder/channel_init.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 "mojo/embedder/channel_init.h"
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "mojo/embedder/embedder.h"
  10
  11 namespace mojo {
  12 namespace embedder {
  13
  14 ChannelInit::ChannelInit() : channel_info_(NULL), weak_factory_(this) {
  15 }
  16
  17 ChannelInit::~ChannelInit() {
  18   if (channel_info_)
  19     DestroyChannel(channel_info_);
  20 }
  21
  22 ScopedMessagePipeHandle ChannelInit::Init(
  23     base::PlatformFile file,
  24     scoped_refptr<base::TaskRunner> io_thread_task_runner) {
  25   DCHECK(!io_thread_task_runner_.get());  // Should only init once.
  26   io_thread_task_runner_ = io_thread_task_runner;
  27   ScopedMessagePipeHandle message_pipe =
  28       CreateChannel(ScopedPlatformHandle(PlatformHandle(file)),
  29                     io_thread_task_runner,
  30                     base::Bind(&ChannelInit::OnCreatedChannel,
  31                                weak_factory_.GetWeakPtr(),
  32                                io_thread_task_runner),
  33                     base::MessageLoop::current()->message_loop_proxy()).Pass();
  34   return message_pipe.Pass();
  35 }
  36
  37 void ChannelInit::WillDestroySoon() {
  38   if (channel_info_)
  39     WillDestroyChannelSoon(channel_info_);
  40 }
  41
  42 // static
  43 void ChannelInit::OnCreatedChannel(base::WeakPtr<ChannelInit> self,
  44                                    scoped_refptr<base::TaskRunner> io_thread,
  45                                    ChannelInfo* channel) {
  46   // If |self| was already destroyed, shut the channel down.
  47   if (!self) {
  48     DestroyChannel(channel);
  49     return;
  50   }
  51
  52   self->channel_info_ = channel;
  53 }
  54
  55 }  // namespace embedder
  56 }  // namespace mojo