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// Copyright 2016 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.
#ifndef MOJO_SHELL_PUBLIC_CPP_APPLICATION_RUNNER_REFERENCE_H_
#define MOJO_SHELL_PUBLIC_CPP_APPLICATION_RUNNER_REFERENCE_H_
#include "base/macros.h"
#include "base/memory/scoped_ptr.h"
#include "base/message_loop/message_loop.h"
#include "mojo/public/cpp/system/core.h"
namespace mojo {
class MessageLoopRefImpl;
// An interface implementation can keep this object as a member variable to
// hold a reference to the ShellConnection, keeping it alive as long as the
// bound implementation exists.
// Since interface implementations can be bound on different threads than the
// ShellConnection, this class is safe to use on any thread. However, each
// instance should only be used on one thread at a time (otherwise there'll be
// races between the AddRef resulting from cloning and destruction).
class MessageLoopRef {
public:
virtual ~MessageLoopRef() {}
virtual scoped_ptr<MessageLoopRef> Clone() = 0;
};
class MessageLoopRefFactory {
public:
MessageLoopRefFactory();
~MessageLoopRefFactory();
void set_quit_closure(const base::Closure& quit_closure) {
quit_closure_ = quit_closure;
}
scoped_ptr<MessageLoopRef> CreateRef();
private:
friend MessageLoopRefImpl;
// Called from MessageLoopRefImpl.
void AddRef();
void Release();
base::Closure quit_closure_;
int ref_count_ = 0;
DISALLOW_COPY_AND_ASSIGN(MessageLoopRefFactory);
};
} // namespace mojo
#endif // MOJO_SHELL_PUBLIC_CPP_APPLICATION_RUNNER_REFERENCE_H_
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