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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/static_loader.h"
#include <utility>
#include "base/bind.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/simple_thread.h"
#include "mojo/public/cpp/bindings/interface_request.h"
#include "mojo/shell/public/cpp/application_runner.h"
#include "mojo/shell/public/cpp/shell_client.h"
#include "mojo/shell/public/interfaces/shell_client.mojom.h"
namespace content {
namespace {
class RunnerThread : public base::SimpleThread {
public:
RunnerThread(const std::string& name,
mojo::shell::mojom::ShellClientRequest request,
scoped_refptr<base::TaskRunner> exit_task_runner,
const base::Closure& exit_callback,
const StaticLoader::ApplicationFactory& factory)
: base::SimpleThread("Mojo Application: " + name),
request_(std::move(request)),
exit_task_runner_(exit_task_runner),
exit_callback_(exit_callback),
factory_(factory) {}
void Run() override {
scoped_ptr<mojo::ApplicationRunner> runner(
new mojo::ApplicationRunner(factory_.Run().release()));
runner->Run(request_.PassMessagePipe().release().value(),
false /* init_base */);
exit_task_runner_->PostTask(FROM_HERE, exit_callback_);
}
private:
mojo::shell::mojom::ShellClientRequest request_;
scoped_refptr<base::TaskRunner> exit_task_runner_;
base::Closure exit_callback_;
StaticLoader::ApplicationFactory factory_;
DISALLOW_COPY_AND_ASSIGN(RunnerThread);
};
} // namespace
StaticLoader::StaticLoader(const ApplicationFactory& factory)
: StaticLoader(factory, base::Closure()) {
}
StaticLoader::StaticLoader(const ApplicationFactory& factory,
const base::Closure& quit_callback)
: factory_(factory), quit_callback_(quit_callback), weak_factory_(this) {
}
StaticLoader::~StaticLoader() {
if (thread_)
StopAppThread();
}
void StaticLoader::Load(const std::string& name,
mojo::shell::mojom::ShellClientRequest request) {
if (thread_)
return;
// If the application's thread quits on its own before this loader dies, we
// reset the Thread object, allowing future Load requests to be fulfilled
// with a new app instance.
auto exit_callback = base::Bind(&StaticLoader::StopAppThread,
weak_factory_.GetWeakPtr());
thread_.reset(new RunnerThread(name, std::move(request),
base::ThreadTaskRunnerHandle::Get(),
exit_callback, factory_));
thread_->Start();
}
void StaticLoader::StopAppThread() {
thread_->Join();
thread_.reset();
if (!quit_callback_.is_null())
quit_callback_.Run();
}
} // namespace content
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