/usr/include/caf/actor.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_HPP
#define CAF_ACTOR_HPP
#include <cstddef>
#include <cstdint>
#include <utility>
#include <type_traits>
#include "caf/intrusive_ptr.hpp"
#include "caf/fwd.hpp"
#include "caf/abstract_actor.hpp"
#include "caf/detail/comparable.hpp"
#include "caf/detail/type_traits.hpp"
namespace caf {
class scoped_actor;
struct invalid_actor_t {
constexpr invalid_actor_t() {}
};
/**
* Identifies an invalid {@link actor}.
* @relates actor
*/
constexpr invalid_actor_t invalid_actor = invalid_actor_t{};
template <class T>
struct is_convertible_to_actor {
using type = typename std::remove_pointer<T>::type;
static constexpr bool value = std::is_base_of<actor_proxy, type>::value
|| std::is_base_of<local_actor, type>::value
|| std::is_same<scoped_actor, type>::value;
};
/**
* Identifies an untyped actor. Can be used with derived types
* of `event_based_actor`, `blocking_actor`, and `actor_proxy`.
*/
class actor : detail::comparable<actor>,
detail::comparable<actor, actor_addr>,
detail::comparable<actor, invalid_actor_t>,
detail::comparable<actor, invalid_actor_addr_t> {
friend class local_actor;
template <class T, typename U>
friend T actor_cast(const U&);
public:
actor() = default;
actor(actor&&) = default;
actor(const actor&) = default;
template <class T>
actor(intrusive_ptr<T> ptr,
typename std::enable_if<is_convertible_to_actor<T>::value>::type* = 0)
: m_ptr(std::move(ptr)) {}
template <class T>
actor(T* ptr,
typename std::enable_if<is_convertible_to_actor<T>::value>::type* = 0)
: m_ptr(ptr) {}
actor(const invalid_actor_t&);
actor& operator=(actor&&) = default;
actor& operator=(const actor&) = default;
template <class T>
typename std::enable_if<is_convertible_to_actor<T>::value, actor&>::type
operator=(intrusive_ptr<T> ptr) {
actor tmp{std::move(ptr)};
swap(tmp);
return *this;
}
template <class T>
typename std::enable_if<is_convertible_to_actor<T>::value, actor&>::type
operator=(T* ptr) {
actor tmp{ptr};
swap(tmp);
return *this;
}
actor& operator=(const invalid_actor_t&);
inline operator bool() const {
return static_cast<bool>(m_ptr);
}
inline bool operator!() const {
return !m_ptr;
}
/**
* Returns a handle that grants access to actor operations such as enqueue.
*/
inline abstract_actor* operator->() const {
return m_ptr.get();
}
inline abstract_actor& operator*() const {
return *m_ptr;
}
intptr_t compare(const actor& other) const;
intptr_t compare(const actor_addr&) const;
inline intptr_t compare(const invalid_actor_t&) const {
return m_ptr ? 1 : 0;
}
inline intptr_t compare(const invalid_actor_addr_t&) const {
return compare(invalid_actor);
}
/**
* Returns the address of the stored actor.
*/
actor_addr address() const;
/**
* Returns whether this is an handle to a remote actor.
*/
bool is_remote() const;
actor_id id() const;
void swap(actor& other);
private:
inline abstract_actor* get() const {
return m_ptr.get();
}
actor(abstract_actor*);
abstract_actor_ptr m_ptr;
};
} // namespace caf
// allow actor to be used in hash maps
namespace std {
template <>
struct hash<caf::actor> {
inline size_t operator()(const caf::actor& ref) const {
return ref ? static_cast<size_t>(ref->id()) : 0;
}
};
} // namespace std
#endif // CAF_ACTOR_HPP
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