source: NonGTP/Boost/boost/detail/lwm_pthreads.hpp @ 857

Revision 857, 1.6 KB checked in by igarcia, 19 years ago (diff)
Line 
1#ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
2#define BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
3
4// MS compatible compilers support #pragma once
5
6#if defined(_MSC_VER) && (_MSC_VER >= 1020)
7# pragma once
8#endif
9
10//
11//  boost/detail/lwm_pthreads.hpp
12//
13//  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
14//
15// Distributed under the Boost Software License, Version 1.0. (See
16// accompanying file LICENSE_1_0.txt or copy at
17// http://www.boost.org/LICENSE_1_0.txt)
18//
19
20#include <pthread.h>
21
22namespace boost
23{
24
25namespace detail
26{
27
28class lightweight_mutex
29{
30private:
31
32    pthread_mutex_t m_;
33
34    lightweight_mutex(lightweight_mutex const &);
35    lightweight_mutex & operator=(lightweight_mutex const &);
36
37public:
38
39    lightweight_mutex()
40    {
41
42// HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
43
44#if defined(__hpux) && defined(_DECTHREADS_)
45        pthread_mutex_init(&m_, pthread_mutexattr_default);
46#else
47        pthread_mutex_init(&m_, 0);
48#endif
49    }
50
51    ~lightweight_mutex()
52    {
53        pthread_mutex_destroy(&m_);
54    }
55
56    class scoped_lock;
57    friend class scoped_lock;
58
59    class scoped_lock
60    {
61    private:
62
63        pthread_mutex_t & m_;
64
65        scoped_lock(scoped_lock const &);
66        scoped_lock & operator=(scoped_lock const &);
67
68    public:
69
70        scoped_lock(lightweight_mutex & m): m_(m.m_)
71        {
72            pthread_mutex_lock(&m_);
73        }
74
75        ~scoped_lock()
76        {
77            pthread_mutex_unlock(&m_);
78        }
79    };
80};
81
82} // namespace detail
83
84} // namespace boost
85
86#endif // #ifndef BOOST_DETAIL_LWM_PTHREADS_HPP_INCLUDED
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