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
|
/*
* Copyright (c) 2012, 2014, Oracle and/or its affiliates. All rights reserved.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; version 2 of the
* License.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#include "base/threading.h"
using namespace base;
#if GLIB_CHECK_VERSION(2,32,0)
void base::threading_init()
{
// noop
}
#else
static bool g_thread_is_ready = false;
void base::threading_init()
{
if (!g_thread_is_ready && !g_thread_supported())
g_thread_init(NULL);
g_thread_is_ready = true;
}
#endif
//--------------------------------------------------------------------------------------------------
Mutex::Mutex()
{
#if GLIB_CHECK_VERSION(2,32,0)
g_mutex_init(&mutex);
#else
threading_init();
mutex = g_mutex_new();
#endif
}
//--------------------------------------------------------------------------------------------------
Mutex::~Mutex()
{
#if GLIB_CHECK_VERSION(2,32,0)
g_mutex_clear(&mutex);
#else
g_mutex_free(mutex);
#endif
}
//--------------------------------------------------------------------------------------------------
void Mutex::swap(Mutex &o)
{
#if GLIB_CHECK_VERSION(2,32,0)
GMutex tmp = o.mutex;
o.mutex = mutex;
mutex = tmp;
#else
GMutex *tmp = o.mutex;
o.mutex = mutex;
mutex = tmp;
#endif
}
//--------------------------------------------------------------------------------------------------
MutexLock::MutexLock(Mutex &mutex) : ptr(&mutex)
{
if (!ptr)
throw std::logic_error("NULL ptr given");
ptr->lock();
}
//--------------------------------------------------------------------------------------------------
// take ownership of an existing lock (the other lock will be reset)
MutexLock::MutexLock(const MutexLock &mlock)
: ptr(mlock.ptr)
{
const_cast<MutexLock*>(&mlock)->ptr = NULL;
}
//--------------------------------------------------------------------------------------------------
MutexLock &MutexLock::operator= (MutexLock &mlock)
{
ptr = mlock.ptr;
mlock.ptr = NULL;
return *this;
}
//--------------------------------------------------------------------------------------------------
MutexLock::~MutexLock()
{
if (ptr)
ptr->unlock();
}
//----------------- Cond ---------------------------------------------------------------------------
Cond::Cond()
{
#if GLIB_CHECK_VERSION(2,32,0)
g_cond_init(&cond);
#else
threading_init();
cond = g_cond_new();
#endif
}
//--------------------------------------------------------------------------------------------------
Cond::~Cond()
{
#if GLIB_CHECK_VERSION(2,32,0)
g_cond_clear(&cond);
#else
g_cond_free(cond);
#endif
}
//----------------- Semaphore ----------------------------------------------------------------------
static int semaphore_data = 1; // Dummy data to identify non-NULL return values.
Semaphore::Semaphore(int initial_count)
{
_queue = g_async_queue_new();
// Push as many "messages" to the queue as is specified by the initial count.
// This amount is what is available before we lock in wait() or try_wait().
while (initial_count-- > 0)
g_async_queue_push(_queue, &semaphore_data);
}
//--------------------------------------------------------------------------------------------------
Semaphore::~Semaphore()
{
g_async_queue_unref(_queue);
}
//--------------------------------------------------------------------------------------------------
void Semaphore::post()
{
g_async_queue_push(_queue, &semaphore_data);
}
//--------------------------------------------------------------------------------------------------
void Semaphore::wait()
{
g_async_queue_pop(_queue); // Waits if there is no data in the queue.
}
//--------------------------------------------------------------------------------------------------
bool Semaphore::try_wait()
{
return g_async_queue_try_pop(_queue) != NULL;
}
//--------------------------------------------------------------------------------------------------
|
