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
|
/*
* The MIT License
*
* Copyright (C) 2017 Alexander Saprykin <saprykin.spb@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "pmem.h"
#include "pmutex.h"
#include <stdlib.h>
#define INCL_DOSSEMAPHORES
#define INCL_DOSERRORS
#include <os2.h>
typedef HMTX mutex_hdl;
struct PMutex_ {
mutex_hdl hdl;
};
P_LIB_API PMutex *
p_mutex_new (void)
{
PMutex *ret;
if (P_UNLIKELY ((ret = p_malloc0 (sizeof (PMutex))) == NULL)) {
P_ERROR ("PMutex::p_mutex_new: failed to allocate memory");
return NULL;
}
if (P_UNLIKELY (DosCreateMutexSem (NULL, (PHMTX) &ret->hdl, 0, FALSE) != NO_ERROR)) {
P_ERROR ("PMutex::p_mutex_new: DosCreateMutexSem() failed");
p_free (ret);
return NULL;
}
return ret;
}
P_LIB_API pboolean
p_mutex_lock (PMutex *mutex)
{
APIRET ulrc;
if (P_UNLIKELY (mutex == NULL))
return FALSE;
while ((ulrc = DosRequestMutexSem (mutex->hdl, SEM_INDEFINITE_WAIT)) == ERROR_INTERRUPT)
;
if (P_LIKELY (ulrc == NO_ERROR))
return TRUE;
else {
P_ERROR ("PMutex::p_mutex_lock: DosRequestMutexSem() failed");
return FALSE;
}
}
P_LIB_API pboolean
p_mutex_trylock (PMutex *mutex)
{
if (P_UNLIKELY (mutex == NULL))
return FALSE;
return (DosRequestMutexSem (mutex->hdl, SEM_IMMEDIATE_RETURN)) == NO_ERROR ? TRUE : FALSE;
}
P_LIB_API pboolean
p_mutex_unlock (PMutex *mutex)
{
if (P_UNLIKELY (mutex == NULL))
return FALSE;
if (P_LIKELY (DosReleaseMutexSem (mutex->hdl) == NO_ERROR))
return TRUE;
else {
P_ERROR ("PMutex::p_mutex_unlock: DosReleaseMutexSem() failed");
return FALSE;
}
}
P_LIB_API void
p_mutex_free (PMutex *mutex)
{
if (P_UNLIKELY (mutex == NULL))
return;
if (P_UNLIKELY (DosCloseMutexSem (mutex->hdl) != NO_ERROR))
P_ERROR ("PMutex::p_mutex_free: DosCloseMutexSem() failed");
p_free (mutex);
}
|
