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// Copyright 2015 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 "content/common/mojo/channel_init.h"
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/lazy_instance.h"
#include "base/message_loop/message_loop.h"
#include "third_party/mojo/src/mojo/edk/embedder/embedder.h"
namespace content {
ChannelInit::ChannelInit() : channel_info_(nullptr), weak_factory_(this) {}
ChannelInit::~ChannelInit() {
if (channel_info_)
mojo::embedder::DestroyChannel(channel_info_,
base::Bind(&base::DoNothing), nullptr);
}
mojo::ScopedMessagePipeHandle ChannelInit::Init(
base::PlatformFile file,
scoped_refptr<base::TaskRunner> io_thread_task_runner) {
scoped_ptr<IPC::ScopedIPCSupport> ipc_support(
new IPC::ScopedIPCSupport(io_thread_task_runner));
mojo::ScopedMessagePipeHandle message_pipe =
mojo::embedder::CreateChannel(
mojo::embedder::ScopedPlatformHandle(
mojo::embedder::PlatformHandle(file)),
io_thread_task_runner,
base::Bind(&ChannelInit::OnCreatedChannel,
weak_factory_.GetWeakPtr(),
base::Passed(&ipc_support)),
base::MessageLoop::current()->task_runner()).Pass();
return message_pipe.Pass();
}
void ChannelInit::WillDestroySoon() {
if (channel_info_)
mojo::embedder::WillDestroyChannelSoon(channel_info_);
}
void ChannelInit::ShutdownOnIOThread() {
if (channel_info_)
mojo::embedder::DestroyChannelOnIOThread(channel_info_);
channel_info_ = nullptr;
ipc_support_.reset();
}
// static
void ChannelInit::OnCreatedChannel(
base::WeakPtr<ChannelInit> self,
scoped_ptr<IPC::ScopedIPCSupport> ipc_support,
mojo::embedder::ChannelInfo* channel) {
// If |self| was already destroyed, shut the channel down.
if (!self) {
mojo::embedder::DestroyChannel(channel,
base::Bind(&base::DoNothing), nullptr);
return;
}
DCHECK(!self->channel_info_);
self->channel_info_ = channel;
self->ipc_support_ = ipc_support.Pass();
}
} // namespace content
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