/usr/include/caf/actor_proxy.hpp is in libcaf-dev 0.13.2-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* ____ _ _____ *
* / ___| / \ | ___| C++ *
* | | / _ \ | |_ Actor *
* | |___ / ___ \| _| Framework *
* \____/_/ \_|_| *
* *
* Copyright (C) 2011 - 2015 *
* Dominik Charousset <dominik.charousset (at) haw-hamburg.de> *
* *
* Distributed under the terms and conditions of the BSD 3-Clause License or *
* (at your option) under the terms and conditions of the Boost Software *
* License 1.0. See accompanying files LICENSE and LICENSE_ALTERNATIVE. *
* *
* If you did not receive a copy of the license files, see *
* http://opensource.org/licenses/BSD-3-Clause and *
* http://www.boost.org/LICENSE_1_0.txt. *
******************************************************************************/
#ifndef CAF_ACTOR_PROXY_HPP
#define CAF_ACTOR_PROXY_HPP
#include <atomic>
#include <cstdint>
#include "caf/abstract_actor.hpp"
#include "caf/detail/shared_spinlock.hpp"
namespace caf {
class actor_proxy;
/**
* A smart pointer to an {@link actor_proxy} instance.
* @relates actor_proxy
*/
using actor_proxy_ptr = intrusive_ptr<actor_proxy>;
/**
* Represents an actor running on a remote machine,
* or different hardware, or in a separate process.
*/
class actor_proxy : public abstract_actor {
public:
/**
* An anchor points to a proxy instance without sharing
* ownership to it, i.e., models a weak ptr.
*/
class anchor : public ref_counted {
public:
friend class actor_proxy;
anchor(actor_proxy* instance = nullptr);
~anchor();
/**
* Queries whether the proxy was already deleted.
*/
bool expired() const;
/**
* Gets a pointer to the proxy or `nullptr`
* if the instance is {@link expired()}.
*/
actor_proxy_ptr get();
private:
/*
* Tries to expire this anchor. Fails if reference
* count of the proxy is nonzero.
*/
bool try_expire() noexcept;
std::atomic<actor_proxy*> m_ptr;
detail::shared_spinlock m_lock;
};
using anchor_ptr = intrusive_ptr<anchor>;
~actor_proxy();
/**
* Establishes a local link state that's not synchronized back
* to the remote instance.
*/
virtual void local_link_to(const actor_addr& other) = 0;
/**
* Removes a local link state.
*/
virtual void local_unlink_from(const actor_addr& other) = 0;
/**
* Invokes cleanup code.
*/
virtual void kill_proxy(uint32_t reason) = 0;
void request_deletion(bool decremented_ref_count) noexcept override;
inline anchor_ptr get_anchor() {
return m_anchor;
}
protected:
actor_proxy(actor_id aid, node_id nid);
anchor_ptr m_anchor;
};
} // namespace caf
#endif // CAF_ACTOR_PROXY_HPP
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