root/trunk/dep/src/zthread/solaris/FastRecursiveLock.h @ 2

Revision 2, 2.8 kB (checked in by yumileroy, 17 years ago)

[svn] * Proper SVN structure

Original author: Neo2003
Date: 2008-10-02 16:23:55-05:00
Line 
1/*
2 * Copyright (c) 2005, Eric Crahen
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is furnished
9 * to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in all
12 * copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
18 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20 *
21 */
22
23#ifndef __ZTFASTRECURSIVELOCK_H__
24#define __ZTFASTRECURSIVELOCK_H__
25
26#include "zthread/NonCopyable.h"
27#include <pthread.h>
28
29namespace ZThread {
30
31/**
32 * @class FastRecursiveLock
33 *
34 * @author Eric Crahen <http://www.code-foo.com>
35 * @date <2003-07-16T23:31:23-0400>
36 * @version 2.2.0
37 *
38 * This FastRecursiveLock implementation uses pthreads mutex attribute
39 * functions to create a recursive lock. This implementation is not
40 * specific to solaris and will work on any system that supports
41 * pthread_mutexattr_settype(). 
42 */ 
43class FastRecursiveLock : private NonCopyable {
44   
45  pthread_mutex_t _mtx;
46
47  /**
48   * @class Attribute
49   *
50   * Utility class to maintain the attribute as long as it is needed.
51   */
52  class Attribute {
53   
54    pthread_mutexattr_t _attr;
55
56  public:
57
58    Attribute() {
59
60      if(pthread_mutexattr_init(&_attr) != 0) {
61        assert(0);
62      }
63     
64      if(pthread_mutexattr_settype(&_attr, PTHREAD_MUTEX_RECURSIVE) != 0) {
65        assert(0);
66      }
67
68    }
69   
70    ~Attribute() {
71
72      if(pthread_mutexattr_destroy(&_attr) != 0) {
73        assert(0);
74      }
75
76    }
77
78    operator pthread_mutexattr_t*() {
79      return &_attr;
80    }
81
82  };
83
84public:
85
86  inline FastRecursiveLock() {
87   
88    static Attribute attr;
89    pthread_mutex_init(&_mtx, (pthread_mutexattr_t*)attr);
90
91  }
92 
93  inline ~FastRecursiveLock() {
94
95    pthread_mutex_destroy(&_mtx);
96
97  }
98 
99  inline void acquire() {
100   
101    pthread_mutex_lock(&_mtx);
102
103  }
104
105  inline void release() {
106   
107    pthread_mutex_unlock(&_mtx);
108   
109  }
110 
111  inline bool tryAcquire(unsigned long timeout=0) {
112
113    return (pthread_mutex_trylock(&_mtx) == 0);
114
115  }
116 
117}; /* FastRecursiveLock */
118
119
120} // namespace ZThread
121
122#endif
Note: See TracBrowser for help on using the browser.