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
|
/************************************************************/
#ifndef _MSC_VER
/************************************************************/
#include <pthread.h>
/* don't include <semaphore.h>, it is not available on OS/X */
typedef struct {
pthread_mutex_t mutex1;
pthread_cond_t cond1;
unsigned int value;
} sem_t;
static int sem_init(sem_t *sem, int pshared, unsigned int value)
{
assert(pshared == 0);
sem->value = value;
return (pthread_mutex_init(&sem->mutex1, NULL) ||
pthread_cond_init(&sem->cond1, NULL));
}
static int sem_post(sem_t *sem)
{
pthread_mutex_lock(&sem->mutex1);
sem->value += 1;
pthread_cond_signal(&sem->cond1);
pthread_mutex_unlock(&sem->mutex1);
return 0;
}
static int sem_wait(sem_t *sem)
{
pthread_mutex_lock(&sem->mutex1);
while (sem->value == 0)
pthread_cond_wait(&sem->cond1, &sem->mutex1);
sem->value -= 1;
pthread_mutex_unlock(&sem->mutex1);
return 0;
}
/************************************************************/
#else
/************************************************************/
/* Very quick and dirty, just what I need for these tests.
Don't use directly in any real code!
*/
#include <Windows.h>
#include <assert.h>
typedef HANDLE sem_t;
typedef HANDLE pthread_t;
static int sem_init(sem_t *sem, int pshared, unsigned int value)
{
assert(pshared == 0);
assert(value == 0);
*sem = CreateSemaphore(NULL, 0, 999, NULL);
return *sem ? 0 : -1;
}
static int sem_post(sem_t *sem)
{
return ReleaseSemaphore(*sem, 1, NULL) ? 0 : -1;
}
static int sem_wait(sem_t *sem)
{
WaitForSingleObject(*sem, INFINITE);
return 0;
}
static DWORD WINAPI myThreadProc(LPVOID lpParameter)
{
void *(* start_routine)(void *) = (void *(*)(void *))lpParameter;
start_routine(NULL);
return 0;
}
static int pthread_create(pthread_t *thread, void *attr,
void *start_routine(void *), void *arg)
{
assert(arg == NULL);
*thread = CreateThread(NULL, 0, myThreadProc, start_routine, 0, NULL);
return *thread ? 0 : -1;
}
/************************************************************/
#endif
/************************************************************/
|
