Imported Upstream version 1.57.0
[platform/upstream/boost.git] / boost / thread / lock_guard.hpp
1 // Distributed under the Boost Software License, Version 1.0. (See
2 // accompanying file LICENSE_1_0.txt or copy at
3 // http://www.boost.org/LICENSE_1_0.txt)
4 // (C) Copyright 2007 Anthony Williams
5 // (C) Copyright 2011-2012 Vicente J. Botet Escriba
6
7 #ifndef BOOST_THREAD_LOCK_GUARD_HPP
8 #define BOOST_THREAD_LOCK_GUARD_HPP
9
10 #include <boost/thread/detail/config.hpp>
11 #include <boost/thread/detail/delete.hpp>
12 #include <boost/thread/detail/move.hpp>
13 #include <boost/thread/detail/lockable_wrapper.hpp>
14 #include <boost/thread/lock_options.hpp>
15 #if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
16 #include <boost/thread/is_locked_by_this_thread.hpp>
17 #include <boost/assert.hpp>
18 #endif
19
20 #include <boost/config/abi_prefix.hpp>
21
22 namespace boost
23 {
24
25   template <typename Mutex>
26   class lock_guard
27   {
28   private:
29     Mutex& m;
30
31   public:
32     typedef Mutex mutex_type;
33     BOOST_THREAD_NO_COPYABLE( lock_guard )
34
35     explicit lock_guard(Mutex& m_) :
36       m(m_)
37     {
38       m.lock();
39     }
40
41     lock_guard(Mutex& m_, adopt_lock_t) :
42       m(m_)
43     {
44 #if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
45       BOOST_ASSERT(is_locked_by_this_thread(m));
46 #endif
47     }
48
49 #if ! defined BOOST_THREAD_NO_CXX11_HDR_INITIALIZER_LIST
50     lock_guard(std::initializer_list<thread_detail::lockable_wrapper<Mutex> > l_) :
51       m(*(const_cast<thread_detail::lockable_wrapper<Mutex>*>(l_.begin())->m))
52     {
53       m.lock();
54     }
55
56     lock_guard(std::initializer_list<thread_detail::lockable_adopt_wrapper<Mutex> > l_) :
57       m(*(const_cast<thread_detail::lockable_adopt_wrapper<Mutex>*>(l_.begin())->m))
58     {
59 #if ! defined BOOST_THREAD_PROVIDES_NESTED_LOCKS
60       BOOST_ASSERT(is_locked_by_this_thread(m));
61 #endif
62     }
63
64 #endif
65     ~lock_guard()
66     {
67       m.unlock();
68     }
69   };
70
71
72 #if ! defined BOOST_THREAD_NO_MAKE_LOCK_GUARD
73   template <typename Lockable>
74   lock_guard<Lockable> make_lock_guard(Lockable& mtx)
75   {
76     return { thread_detail::lockable_wrapper<Lockable>(mtx) };
77   }
78   template <typename Lockable>
79   lock_guard<Lockable> make_lock_guard(Lockable& mtx, adopt_lock_t)
80   {
81     return { thread_detail::lockable_adopt_wrapper<Lockable>(mtx) };
82   }
83 #endif
84 }
85
86 #include <boost/config/abi_suffix.hpp>
87
88 #endif