blob: 253c0e412ffb373219d51dee65cf54892eaf30df (
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
|
/* Copyright (C) 2003 MySQL AB
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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "NdbMutex.h"
#include <pthread.h>
#include <stdlib.h>
NdbMutex* NdbMutex_Create(void)
{
NdbMutex* pNdbMutex;
pNdbMutex = create_sem(1);
return pNdbMutex;
}
int NdbMutex_Destroy(NdbMutex* p_mutex)
{
if (p_mutex == NULL)
return -1;
kill_sem(p_mutex);
return 0;
}
int NdbMutex_Lock(NdbMutex* p_mutex)
{
if (p_mutex == NULL)
return -1;
wait_sem(p_mutex);
return 0;
}
int NdbMutex_Unlock(NdbMutex* p_mutex)
{
if (p_mutex == NULL)
return -1;
signal_sem(p_mutex);
return 0;
}
int NdbMutex_Trylock(NdbMutex* p_mutex)
{
int result = -1;
if (p_mutex != NULL) {
OSSEMVAL semvalue = get_sem(p_mutex);
if (semvalue > 0) {
wait_sem(p_mutex);
result = 0;
}
}
return result;
}
|
