blob: d403257243dde74f991006915065f34b73f256cb (
plain) (
blame)
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
|
#include "../globals.h"
/*
* Conditional variable. Implemented using pthreads condition variables, and
* using events on windows.
*/
#include "condition_variable.h"
// #define TRACE
condition_variable::condition_variable() {
#if defined(__WIN32__)
_event = CreateEvent(NULL, FALSE, FALSE, NULL);
#else
pthread_cond_init(&_cond, NULL);
pthread_mutex_init(&_mutex, NULL);
#endif
}
condition_variable::~condition_variable() {
#if defined(__WIN32__)
CloseHandle(_event);
#else
pthread_cond_destroy(&_cond);
pthread_mutex_destroy(&_mutex);
#endif
}
/**
* Wait indefinitely until condition is signaled.
*/
void condition_variable::wait() {
#ifdef TRACE
printf("waiting on condition_variable: 0x%" PRIxPTR "\n",
(uintptr_t)this);
#endif
#if defined(__WIN32__)
WaitForSingleObject(_event, INFINITE);
#else
pthread_mutex_lock(&_mutex);
pthread_cond_wait(&_cond, &_mutex);
pthread_mutex_unlock(&_mutex);
#endif
#ifdef TRACE
printf("resumed on condition_variable: 0x%" PRIxPTR "\n",
(uintptr_t)this);
#endif
}
/**
* Signal condition, and resume the waiting thread.
*/
void condition_variable::signal() {
#if defined(__WIN32__)
SetEvent(_event);
#else
pthread_mutex_lock(&_mutex);
pthread_cond_signal(&_cond);
pthread_mutex_unlock(&_mutex);
#endif
#ifdef TRACE
printf("signal condition_variable: 0x%" PRIxPTR "\n",
(uintptr_t)this);
#endif
}
|