/usr/include/caf/io/handle.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_DETAIL_HANDLE_HPP
#define CAF_DETAIL_HANDLE_HPP
#include <cstdint>
#include "caf/detail/comparable.hpp"
namespace caf {
/**
* Base class for IO handles such as `accept_handle` or `connection_handle`.
*/
template <class Subtype, int64_t InvalidId = -1>
class handle : detail::comparable<Subtype> {
public:
constexpr handle() : m_id{InvalidId} {
// nop
}
handle(const Subtype& other) {
m_id = other.id();
}
handle(const handle& other) = default;
Subtype& operator=(const handle& other) {
m_id = other.id();
return *static_cast<Subtype*>(this);
}
/**
* Returns the unique identifier of this handle.
*/
int64_t id() const {
return m_id;
}
/**
* Sets the unique identifier of this handle.
*/
void set_id(int64_t value) {
m_id = value;
}
int64_t compare(const Subtype& other) const {
return m_id - other.id();
}
bool invalid() const {
return m_id == InvalidId;
}
void set_invalid() {
set_id(InvalidId);
}
static Subtype from_int(int64_t id) {
return {id};
}
protected:
handle(int64_t handle_id) : m_id{handle_id} {
// nop
}
private:
int64_t m_id;
};
} // namespace caf
#endif // CAF_DETAIL_HANDLE_HPP
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