/usr/include/caf/detail/shared_spinlock.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_SHARED_SPINLOCK_HPP
#define CAF_SHARED_SPINLOCK_HPP
#include <atomic>
#include <cstddef>
namespace caf {
namespace detail {
/**
* A spinlock implementation providing shared and exclusive locking.
*/
class shared_spinlock {
std::atomic<long> m_flag;
public:
shared_spinlock();
void lock();
void unlock();
bool try_lock();
void lock_shared();
void unlock_shared();
bool try_lock_shared();
void lock_upgrade();
void unlock_upgrade();
void unlock_upgrade_and_lock();
void unlock_and_lock_upgrade();
};
} // namespace detail
} // namespace caf
#endif // CAF_SHARED_SPINLOCK_HPP
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