1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
|
/*
* 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)
*
* (C) Copyright 2013 Andrey Semashev
*/
/*!
* \file locks/unlock_guard.hpp
*
* \brief This header defines a scope guard temporarily releases a lock.
*/
#ifndef BOOST_SYNC_LOCKS_UNLOCK_GUARD_HPP_INCLUDED_
#define BOOST_SYNC_LOCKS_UNLOCK_GUARD_HPP_INCLUDED_
#include <boost/sync/detail/config.hpp>
#ifdef BOOST_HAS_PRAGMA_ONCE
#pragma once
#endif
#include <boost/sync/locks/unlock_guard_fwd.hpp>
#include <boost/sync/detail/header.hpp>
namespace boost {
namespace sync {
/*!
* \brief A scope guard that releases a lock
*/
template< typename Lockable >
class unlock_guard
{
public:
// Note: naming is for compatibility with other lock types
typedef Lockable mutex_type;
private:
mutex_type& m_lockable;
public:
explicit unlock_guard(mutex_type& m) BOOST_NOEXCEPT : m_lockable(m)
{
m.unlock();
}
~unlock_guard() BOOST_NOEXCEPT_IF(false)
{
m_lockable.lock();
}
BOOST_DELETED_FUNCTION(unlock_guard(unlock_guard const&))
BOOST_DELETED_FUNCTION(unlock_guard& operator= (unlock_guard const&))
};
} // namespace sync
} // namespace boost
#include <boost/sync/detail/footer.hpp>
#endif // BOOST_SYNC_LOCKS_UNLOCK_GUARD_HPP_INCLUDED_
|
