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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 <set>
#include <utility>
#include "base/bind.h"
#include "base/callback.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/message_loop/message_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "base/threading/platform_thread.h"
#include "mojo/message_pump/message_pump_mojo.h"
#include "mojo/public/cpp/bindings/strong_binding.h"
#include "mojo/shell/public/cpp/connection.h"
#include "mojo/shell/public/cpp/content_handler_factory.h"
#include "mojo/shell/public/cpp/interface_factory_impl.h"
namespace mojo {
namespace {
class ApplicationThread : public base::PlatformThread::Delegate {
public:
ApplicationThread(
scoped_refptr<base::SingleThreadTaskRunner> handler_thread,
const base::Callback<void(ApplicationThread*)>& termination_callback,
ContentHandlerFactory::Delegate* handler_delegate,
InterfaceRequest<shell::mojom::ShellClient> request,
URLResponsePtr response,
const Callback<void()>& destruct_callback)
: handler_thread_(handler_thread),
termination_callback_(termination_callback),
handler_delegate_(handler_delegate),
request_(std::move(request)),
response_(std::move(response)),
destruct_callback_(destruct_callback) {}
~ApplicationThread() override {
destruct_callback_.Run();
}
private:
void ThreadMain() override {
handler_delegate_->RunApplication(std::move(request_),
std::move(response_));
handler_thread_->PostTask(FROM_HERE,
base::Bind(termination_callback_, this));
}
scoped_refptr<base::SingleThreadTaskRunner> handler_thread_;
base::Callback<void(ApplicationThread*)> termination_callback_;
ContentHandlerFactory::Delegate* handler_delegate_;
InterfaceRequest<shell::mojom::ShellClient> request_;
URLResponsePtr response_;
Callback<void()> destruct_callback_;
DISALLOW_COPY_AND_ASSIGN(ApplicationThread);
};
class ContentHandlerImpl : public shell::mojom::ContentHandler {
public:
ContentHandlerImpl(ContentHandlerFactory::Delegate* delegate,
InterfaceRequest<shell::mojom::ContentHandler> request)
: delegate_(delegate),
binding_(this, std::move(request)),
weak_factory_(this) {}
~ContentHandlerImpl() override {
// We're shutting down and doing cleanup. Cleanup may trigger calls back to
// OnThreadEnd(). As we're doing the cleanup here we don't want to do it in
// OnThreadEnd() as well. InvalidateWeakPtrs() ensures we don't get any
// calls to OnThreadEnd().
weak_factory_.InvalidateWeakPtrs();
for (auto thread : active_threads_) {
base::PlatformThread::Join(thread.second);
delete thread.first;
}
}
private:
// Overridden from ContentHandler:
void StartApplication(InterfaceRequest<shell::mojom::ShellClient> request,
URLResponsePtr response,
const Callback<void()>& destruct_callback) override {
ApplicationThread* thread =
new ApplicationThread(base::ThreadTaskRunnerHandle::Get(),
base::Bind(&ContentHandlerImpl::OnThreadEnd,
weak_factory_.GetWeakPtr()),
delegate_, std::move(request),
std::move(response), destruct_callback);
base::PlatformThreadHandle handle;
bool launched = base::PlatformThread::Create(0, thread, &handle);
DCHECK(launched);
active_threads_[thread] = handle;
}
void OnThreadEnd(ApplicationThread* thread) {
DCHECK(active_threads_.find(thread) != active_threads_.end());
base::PlatformThreadHandle handle = active_threads_[thread];
active_threads_.erase(thread);
base::PlatformThread::Join(handle);
delete thread;
}
ContentHandlerFactory::Delegate* delegate_;
std::map<ApplicationThread*, base::PlatformThreadHandle> active_threads_;
StrongBinding<shell::mojom::ContentHandler> binding_;
base::WeakPtrFactory<ContentHandlerImpl> weak_factory_;
DISALLOW_COPY_AND_ASSIGN(ContentHandlerImpl);
};
} // namespace
ContentHandlerFactory::ContentHandlerFactory(Delegate* delegate)
: delegate_(delegate) {
}
ContentHandlerFactory::~ContentHandlerFactory() {
}
void ContentHandlerFactory::ManagedDelegate::RunApplication(
InterfaceRequest<shell::mojom::ShellClient> request,
URLResponsePtr response) {
base::MessageLoop loop(common::MessagePumpMojo::Create());
auto application =
this->CreateApplication(std::move(request), std::move(response));
if (application)
loop.Run();
}
void ContentHandlerFactory::Create(
Connection* connection,
InterfaceRequest<shell::mojom::ContentHandler> request) {
new ContentHandlerImpl(delegate_, std::move(request));
}
} // namespace mojo
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