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-rw-r--r--lib/asio/detail/scoped_lock.hpp101
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diff --git a/lib/asio/detail/scoped_lock.hpp b/lib/asio/detail/scoped_lock.hpp
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--- a/lib/asio/detail/scoped_lock.hpp
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-//
-// detail/scoped_lock.hpp
-// ~~~~~~~~~~~~~~~~~~~~~~
-//
-// Copyright (c) 2003-2018 Christopher M. Kohlhoff (chris at kohlhoff dot com)
-//
-// Distributed under the Boost Software License, Version 1.0. (See accompanying
-// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
-//
-
-#ifndef ASIO_DETAIL_SCOPED_LOCK_HPP
-#define ASIO_DETAIL_SCOPED_LOCK_HPP
-
-#if defined(_MSC_VER) && (_MSC_VER >= 1200)
-# pragma once
-#endif // defined(_MSC_VER) && (_MSC_VER >= 1200)
-
-#include "asio/detail/noncopyable.hpp"
-
-#include "asio/detail/push_options.hpp"
-
-namespace asio {
-namespace detail {
-
-// Helper class to lock and unlock a mutex automatically.
-template <typename Mutex>
-class scoped_lock
- : private noncopyable
-{
-public:
- // Tag type used to distinguish constructors.
- enum adopt_lock_t { adopt_lock };
-
- // Constructor adopts a lock that is already held.
- scoped_lock(Mutex& m, adopt_lock_t)
- : mutex_(m),
- locked_(true)
- {
- }
-
- // Constructor acquires the lock.
- explicit scoped_lock(Mutex& m)
- : mutex_(m)
- {
- mutex_.lock();
- locked_ = true;
- }
-
- // Destructor releases the lock.
- ~scoped_lock()
- {
- if (locked_)
- mutex_.unlock();
- }
-
- // Explicitly acquire the lock.
- void lock()
- {
- if (!locked_)
- {
- mutex_.lock();
- locked_ = true;
- }
- }
-
- // Explicitly release the lock.
- void unlock()
- {
- if (locked_)
- {
- mutex_.unlock();
- locked_ = false;
- }
- }
-
- // Test whether the lock is held.
- bool locked() const
- {
- return locked_;
- }
-
- // Get the underlying mutex.
- Mutex& mutex()
- {
- return mutex_;
- }
-
-private:
- // The underlying mutex.
- Mutex& mutex_;
-
- // Whether the mutex is currently locked or unlocked.
- bool locked_;
-};
-
-} // namespace detail
-} // namespace asio
-
-#include "asio/detail/pop_options.hpp"
-
-#endif // ASIO_DETAIL_SCOPED_LOCK_HPP