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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/shell/runner/host/child_process_base.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
#include "base/threading/thread.h"
#include "mojo/edk/embedder/embedder.h"
#include "mojo/edk/embedder/process_delegate.h"
#include "mojo/shell/runner/common/client_util.h"
namespace mojo {
namespace shell {
namespace {
// Should be created and initialized on the main thread and kept alive as long
// a Mojo application is running in the current process.
class ScopedAppContext : public edk::ProcessDelegate {
public:
ScopedAppContext()
: io_thread_("io_thread"), wait_for_shutdown_event_(true, false) {
// Initialize Mojo before starting any threads.
edk::Init();
// Create and start our I/O thread.
base::Thread::Options io_thread_options(base::MessageLoop::TYPE_IO, 0);
CHECK(io_thread_.StartWithOptions(io_thread_options));
io_runner_ = io_thread_.task_runner().get();
CHECK(io_runner_.get());
edk::InitIPCSupport(this, io_runner_);
edk::SetParentPipeHandleFromCommandLine();
}
~ScopedAppContext() override {
edk::ShutdownIPCSupport();
wait_for_shutdown_event_.Wait();
}
private:
// ProcessDelegate implementation.
void OnShutdownComplete() override {
wait_for_shutdown_event_.Signal();
}
base::Thread io_thread_;
scoped_refptr<base::SingleThreadTaskRunner> io_runner_;
// Used to unblock the main thread on shutdown.
base::WaitableEvent wait_for_shutdown_event_;
DISALLOW_COPY_AND_ASSIGN(ScopedAppContext);
};
} // namespace
void ChildProcessMain(const RunCallback& callback) {
DCHECK(!base::MessageLoop::current());
ScopedAppContext app_context;
callback.Run(GetShellClientRequestFromCommandLine());
}
} // namespace shell
} // namespace mojo
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