blob: bbf9c85d67a05c6c0f1f6528461c294012836260 (
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
|
// **********************************************************************
//
// Copyright (c) 2001
// Mutable Realms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <IceUtil/RecMutex.h>
#include <IceUtil/Exception.h>
using namespace std;
#ifdef _WIN32
IceUtil::RecMutex::RecMutex() :
_count(0)
{
InitializeCriticalSection(&_mutex);
}
IceUtil::RecMutex::~RecMutex()
{
assert(_count == 0);
DeleteCriticalSection(&_mutex);
}
bool
IceUtil::RecMutex::lock() const
{
EnterCriticalSection(&_mutex);
if(++_count > 1)
{
LeaveCriticalSection(&_mutex);
return false;
}
return true;
}
bool
IceUtil::RecMutex::trylock() const
{
if(!TryEnterCriticalSection(&_mutex))
{
throw ThreadLockedException(__FILE__, __LINE__);
}
if(++_count > 1)
{
LeaveCriticalSection(&_mutex);
return false;
}
return true;
}
bool
IceUtil::RecMutex::unlock() const
{
if(--_count == 0)
{
LeaveCriticalSection(&_mutex);
return true;
}
return false;
}
void
IceUtil::RecMutex::unlock(LockState& state) const
{
state.count = _count;
_count = 0;
LeaveCriticalSection(&_mutex);
}
void
IceUtil::RecMutex::lock(LockState& state) const
{
EnterCriticalSection(&_mutex);
_count = state.count;
}
#else
IceUtil::RecMutex::RecMutex() :
_count(0)
{
const pthread_mutexattr_t attr = { PTHREAD_MUTEX_RECURSIVE_NP };
int rc = pthread_mutex_init(&_mutex, &attr);
if(rc != 0)
{
throw ThreadSyscallException(__FILE__, __LINE__);
}
}
IceUtil::RecMutex::~RecMutex()
{
assert(_count == 0);
int rc = 0;
rc = pthread_mutex_destroy(&_mutex);
assert(rc == 0);
}
bool
IceUtil::RecMutex::lock() const
{
int rc = pthread_mutex_lock(&_mutex);
if(rc != 0)
{
throw ThreadSyscallException(__FILE__, __LINE__);
}
if(++_count > 1)
{
rc = pthread_mutex_unlock(&_mutex);
assert(rc == 0);
return false;
}
return true;
}
bool
IceUtil::RecMutex::trylock() const
{
int rc = pthread_mutex_trylock(&_mutex);
if(rc != 0)
{
if(rc == EBUSY)
{
throw ThreadLockedException(__FILE__, __LINE__);
}
throw ThreadSyscallException(__FILE__, __LINE__);
}
if(++_count > 1)
{
rc = pthread_mutex_unlock(&_mutex);
assert(rc == 0);
return false;
}
return true;
}
bool
IceUtil::RecMutex::unlock() const
{
if(--_count == 0)
{
int rc = 0; // Prevent warnings when NDEBUG is defined.
rc = pthread_mutex_unlock(&_mutex);
assert(rc == 0);
return true;
}
return false;
}
void
IceUtil::RecMutex::unlock(LockState& state) const
{
state.mutex = &_mutex;
state.count = _count;
_count = 0;
}
void
IceUtil::RecMutex::lock(LockState& state) const
{
_count = state.count;
}
#endif
|
