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// Copyright 2014 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 "mojo/system/embedder/embedder.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/memory/scoped_ptr.h"
#include "mojo/system/channel.h"
#include "mojo/system/core_impl.h"
#include "mojo/system/local_message_pipe_endpoint.h"
#include "mojo/system/message_pipe.h"
#include "mojo/system/message_pipe_dispatcher.h"
#include "mojo/system/proxy_message_pipe_endpoint.h"
namespace mojo {
namespace embedder {
struct ChannelInfo {
scoped_refptr<system::Channel> channel;
};
static void CreateChannelOnIOThread(
ScopedPlatformHandle platform_handle,
scoped_refptr<system::MessagePipe> message_pipe,
DidCreateChannelOnIOThreadCallback callback) {
CHECK(platform_handle.is_valid());
scoped_ptr<ChannelInfo> channel_info(new ChannelInfo);
// Create and initialize a |system::Channel|.
channel_info->channel = new system::Channel();
bool success = channel_info->channel->Init(platform_handle.Pass());
DCHECK(success);
// Attach the message pipe endpoint.
system::MessageInTransit::EndpointId endpoint_id =
channel_info->channel->AttachMessagePipeEndpoint(message_pipe, 1);
DCHECK_EQ(endpoint_id, system::Channel::kBootstrapEndpointId);
channel_info->channel->RunMessagePipeEndpoint(
system::Channel::kBootstrapEndpointId,
system::Channel::kBootstrapEndpointId);
// Hand the channel back to the embedder.
callback.Run(channel_info.release());
}
void Init() {
Core::Init(new system::CoreImpl());
}
MojoHandle CreateChannel(
ScopedPlatformHandle platform_handle,
scoped_refptr<base::TaskRunner> io_thread_task_runner,
DidCreateChannelOnIOThreadCallback callback) {
DCHECK(platform_handle.is_valid());
scoped_refptr<system::MessagePipe> message_pipe(
new system::MessagePipe(scoped_ptr<system::MessagePipeEndpoint>(
new system::LocalMessagePipeEndpoint()),
scoped_ptr<system::MessagePipeEndpoint>(
new system::ProxyMessagePipeEndpoint())));
scoped_refptr<system::MessagePipeDispatcher> dispatcher(
new system::MessagePipeDispatcher());
dispatcher->Init(message_pipe, 0);
system::CoreImpl* core_impl = static_cast<system::CoreImpl*>(Core::Get());
DCHECK(core_impl);
MojoHandle rv = core_impl->AddDispatcher(dispatcher);
// TODO(vtl): Do we properly handle the failure case here?
if (rv != MOJO_HANDLE_INVALID) {
io_thread_task_runner->PostTask(FROM_HERE,
base::Bind(&CreateChannelOnIOThread,
base::Passed(&platform_handle),
message_pipe,
callback));
}
return rv;
}
void DestroyChannelOnIOThread(ChannelInfo* channel_info) {
DCHECK(channel_info);
DCHECK(channel_info->channel.get());
channel_info->channel->Shutdown();
delete channel_info;
}
} // namespace embedder
} // namespace mojo
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