summaryrefslogtreecommitdiffstats
blob: ad3b7e1530172919ab1138168661816cdc54a627 (plain)
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
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
#ifndef BOOST_THREAD_PTHREAD_RECURSIVE_MUTEX_HPP
#define BOOST_THREAD_PTHREAD_RECURSIVE_MUTEX_HPP
// (C) Copyright 2007-8 Anthony Williams
// 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)

#include <pthread.h>
#include <boost/utility.hpp>
#include <boost/throw_exception.hpp>
#include <boost/thread/exceptions.hpp>
#include <boost/thread/locks.hpp>
#include <boost/thread/thread_time.hpp>
#include <boost/assert.hpp>
#ifndef _WIN32
#include <unistd.h>
#endif
#include <boost/date_time/posix_time/conversion.hpp>
#include <errno.h>
#include "timespec.hpp"
#include "pthread_mutex_scoped_lock.hpp"

#ifdef _POSIX_TIMEOUTS
#if _POSIX_TIMEOUTS >= 0
#define BOOST_PTHREAD_HAS_TIMEDLOCK
#endif
#endif

#include <boost/config/abi_prefix.hpp>

namespace boost
{
    class recursive_mutex:
        boost::noncopyable
    {
    private:
        pthread_mutex_t m;
    public:
        recursive_mutex()
        {
            pthread_mutexattr_t attr;
            
            int const init_attr_res=pthread_mutexattr_init(&attr);
            if(init_attr_res)
            {
                boost::throw_exception(thread_resource_error());
            }
            int const set_attr_res=pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
            if(set_attr_res)
            {
                boost::throw_exception(thread_resource_error());
            }
            
            int const res=pthread_mutex_init(&m,&attr);
            if(res)
            {
                boost::throw_exception(thread_resource_error());
            }
            BOOST_VERIFY(!pthread_mutexattr_destroy(&attr));
        }
        ~recursive_mutex()
        {
            BOOST_VERIFY(!pthread_mutex_destroy(&m));
        }
        
        void lock()
        {
            BOOST_VERIFY(!pthread_mutex_lock(&m));
        }

        void unlock()
        {
            BOOST_VERIFY(!pthread_mutex_unlock(&m));
        }
        
        bool try_lock()
        {
            int const res=pthread_mutex_trylock(&m);
            BOOST_ASSERT(!res || res==EBUSY);
            return !res;
        }

        typedef pthread_mutex_t* native_handle_type;
        native_handle_type native_handle()
        {
            return &m;
        }

        typedef unique_lock<recursive_mutex> scoped_lock;
        typedef detail::try_lock_wrapper<recursive_mutex> scoped_try_lock;
    };

    typedef recursive_mutex recursive_try_mutex;

    class recursive_timed_mutex:
        boost::noncopyable
    {
    private:
        pthread_mutex_t m;
#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
        pthread_cond_t cond;
        bool is_locked;
        pthread_t owner;
        unsigned count;
#endif
    public:
        recursive_timed_mutex()
        {
#ifdef BOOST_PTHREAD_HAS_TIMEDLOCK
            pthread_mutexattr_t attr;
            
            int const init_attr_res=pthread_mutexattr_init(&attr);
            if(init_attr_res)
            {
                boost::throw_exception(thread_resource_error());
            }
            int const set_attr_res=pthread_mutexattr_settype(&attr,PTHREAD_MUTEX_RECURSIVE);
            if(set_attr_res)
            {
                boost::throw_exception(thread_resource_error());
            }
            
            int const res=pthread_mutex_init(&m,&attr);
            if(res)
            {
                BOOST_VERIFY(!pthread_mutexattr_destroy(&attr));
                boost::throw_exception(thread_resource_error());
            }
            BOOST_VERIFY(!pthread_mutexattr_destroy(&attr));
#else
            int const res=pthread_mutex_init(&m,NULL);
            if(res)
            {
                boost::throw_exception(thread_resource_error());
            }
            int const res2=pthread_cond_init(&cond,NULL);
            if(res2)
            {
                BOOST_VERIFY(!pthread_mutex_destroy(&m));
                boost::throw_exception(thread_resource_error());
            }
            is_locked=false;
            count=0;
#endif
        }
        ~recursive_timed_mutex()
        {
            BOOST_VERIFY(!pthread_mutex_destroy(&m));
#ifndef BOOST_PTHREAD_HAS_TIMEDLOCK
            BOOST_VERIFY(!pthread_cond_destroy(&cond));
#endif
        }

        template<typename TimeDuration>
        bool timed_lock(TimeDuration const & relative_time)
        {
            return timed_lock(get_system_time()+relative_time);
        }

#ifdef BOOST_PTHREAD_HAS_TIMEDLOCK
        void lock()
        {
            BOOST_VERIFY(!pthread_mutex_lock(&m));
        }

        void unlock()
        {
            BOOST_VERIFY(!pthread_mutex_unlock(&m));
        }
        
        bool try_lock()
        {
            int const res=pthread_mutex_trylock(&m);
            BOOST_ASSERT(!res || res==EBUSY);
            return !res;
        }
        bool timed_lock(system_time const & abs_time)
        {
            struct timespec const timeout=detail::get_timespec(abs_time);
            int const res=pthread_mutex_timedlock(&m,&timeout);
            BOOST_ASSERT(!res || res==ETIMEDOUT);
            return !res;
        }

        typedef pthread_mutex_t* native_handle_type;
        native_handle_type native_handle()
        {
            return &m;
        }

#else
        void lock()
        {
            boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
            if(is_locked && pthread_equal(owner,pthread_self()))
            {
                ++count;
                return;
            }
            
            while(is_locked)
            {
                BOOST_VERIFY(!pthread_cond_wait(&cond,&m));
            }
            is_locked=true;
            ++count;
            owner=pthread_self();
        }

        void unlock()
        {
            boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
            if(!--count)
            {
                is_locked=false;
            }
            BOOST_VERIFY(!pthread_cond_signal(&cond));
        }
        
        bool try_lock()
        {
            boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
            if(is_locked && !pthread_equal(owner,pthread_self()))
            {
                return false;
            }
            is_locked=true;
            ++count;
            owner=pthread_self();
            return true;
        }

        bool timed_lock(system_time const & abs_time)
        {
            struct timespec const timeout=detail::get_timespec(abs_time);
            boost::pthread::pthread_mutex_scoped_lock const local_lock(&m);
            if(is_locked && pthread_equal(owner,pthread_self()))
            {
                ++count;
                return true;
            }
            while(is_locked)
            {
                int const cond_res=pthread_cond_timedwait(&cond,&m,&timeout);
                if(cond_res==ETIMEDOUT)
                {
                    return false;
                }
                BOOST_ASSERT(!cond_res);
            }
            is_locked=true;
            ++count;
            owner=pthread_self();
            return true;
        }
#endif

        typedef unique_lock<recursive_timed_mutex> scoped_timed_lock;
        typedef detail::try_lock_wrapper<recursive_timed_mutex> scoped_try_lock;
        typedef scoped_timed_lock scoped_lock;
    };

}

#include <boost/config/abi_suffix.hpp>

#endif