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1 | /* Copyright 2006-2013 Joaquin M Lopez Munoz. |
2 | * Distributed under the Boost Software License, Version 1.0. | |
3 | * (See accompanying file LICENSE_1_0.txt or copy at | |
4 | * http://www.boost.org/LICENSE_1_0.txt) | |
5 | * | |
6 | * See http://www.boost.org/libs/flyweight for library home page. | |
7 | */ | |
8 | ||
9 | #ifndef BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP | |
10 | #define BOOST_FLYWEIGHT_DETAIL_RECURSIVE_LW_MUTEX_HPP | |
11 | ||
12 | #if defined(_MSC_VER) | |
13 | #pragma once | |
14 | #endif | |
15 | ||
16 | /* Recursive lightweight mutex. Relies entirely on | |
17 | * boost::detail::lightweight_mutex, except in Pthreads, where we | |
18 | * explicitly use the PTHREAD_MUTEX_RECURSIVE attribute | |
19 | * (lightweight_mutex uses the default mutex type instead). | |
20 | */ | |
21 | ||
22 | #include <boost/config.hpp> | |
23 | ||
24 | #if !defined(BOOST_HAS_PTHREADS) | |
25 | #include <boost/detail/lightweight_mutex.hpp> | |
26 | namespace boost{ | |
27 | ||
28 | namespace flyweights{ | |
29 | ||
30 | namespace detail{ | |
31 | ||
32 | typedef boost::detail::lightweight_mutex recursive_lightweight_mutex; | |
33 | ||
34 | } /* namespace flyweights::detail */ | |
35 | ||
36 | } /* namespace flyweights */ | |
37 | ||
38 | } /* namespace boost */ | |
39 | #else | |
40 | /* code shamelessly ripped from <boost/detail/lwm_pthreads.hpp> */ | |
41 | ||
42 | #include <boost/assert.hpp> | |
43 | #include <boost/noncopyable.hpp> | |
44 | #include <pthread.h> | |
45 | ||
46 | namespace boost{ | |
47 | ||
48 | namespace flyweights{ | |
49 | ||
50 | namespace detail{ | |
51 | ||
52 | struct recursive_lightweight_mutex:noncopyable | |
53 | { | |
54 | recursive_lightweight_mutex() | |
55 | { | |
56 | pthread_mutexattr_t attr; | |
57 | BOOST_VERIFY(pthread_mutexattr_init(&attr)==0); | |
58 | BOOST_VERIFY(pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE)==0); | |
59 | BOOST_VERIFY(pthread_mutex_init(&m_,&attr)==0); | |
60 | BOOST_VERIFY(pthread_mutexattr_destroy(&attr)==0); | |
61 | } | |
62 | ||
63 | ~recursive_lightweight_mutex(){pthread_mutex_destroy(&m_);} | |
64 | ||
65 | struct scoped_lock; | |
66 | friend struct scoped_lock; | |
67 | struct scoped_lock:noncopyable | |
68 | { | |
69 | public: | |
70 | scoped_lock(recursive_lightweight_mutex& m):m_(m.m_) | |
71 | { | |
72 | BOOST_VERIFY(pthread_mutex_lock(&m_)==0); | |
73 | } | |
74 | ||
75 | ~scoped_lock(){BOOST_VERIFY(pthread_mutex_unlock(&m_)==0);} | |
76 | ||
77 | private: | |
78 | pthread_mutex_t& m_; | |
79 | }; | |
80 | ||
81 | private: | |
82 | pthread_mutex_t m_; | |
83 | }; | |
84 | ||
85 | } /* namespace flyweights::detail */ | |
86 | ||
87 | } /* namespace flyweights */ | |
88 | ||
89 | } /* namespace boost */ | |
90 | #endif | |
91 | ||
92 | #endif |