1 //
2 //  boost/signals2/detail/lwm_pthreads.hpp
3 //
4 //  Copyright (c) 2002 Peter Dimov and Multi Media Ltd.
5 //  Copyright (c) 2008 Frank Mori Hess
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See
8 // accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10 //
11 
12 #ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP
13 #define BOOST_SIGNALS2_LWM_PTHREADS_HPP
14 
15 // MS compatible compilers support #pragma once
16 
17 #if defined(_MSC_VER)
18 # pragma once
19 #endif
20 
21 #include <boost/assert.hpp>
22 #include <pthread.h>
23 
24 namespace boost
25 {
26 
27 namespace signals2
28 {
29 
30 class mutex
31 {
32 private:
33 
34     pthread_mutex_t m_;
35 
36     mutex(mutex const &);
37     mutex & operator=(mutex const &);
38 
39 public:
40 
mutex()41     mutex()
42     {
43 
44 // HPUX 10.20 / DCE has a nonstandard pthread_mutex_init
45 
46 #if defined(__hpux) && defined(_DECTHREADS_)
47         BOOST_VERIFY(pthread_mutex_init(&m_, pthread_mutexattr_default) == 0);
48 #else
49         BOOST_VERIFY(pthread_mutex_init(&m_, 0) == 0);
50 #endif
51     }
52 
~mutex()53     ~mutex()
54     {
55         BOOST_VERIFY(pthread_mutex_destroy(&m_) == 0);
56     }
57 
lock()58     void lock()
59     {
60         BOOST_VERIFY(pthread_mutex_lock(&m_) == 0);
61     }
62 
try_lock()63     bool try_lock()
64     {
65         return pthread_mutex_trylock(&m_) == 0;
66     }
67 
unlock()68     void unlock()
69     {
70         BOOST_VERIFY(pthread_mutex_unlock(&m_) == 0);
71     }
72 };
73 
74 } // namespace signals2
75 
76 } // namespace boost
77 
78 #endif // #ifndef BOOST_SIGNALS2_LWM_PTHREADS_HPP
79