blob: 3e8b78b3e0f396a14371260dc397421cde87d1ba (
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
|
// Copyright 2017 syzkaller project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
#include <pthread.h>
typedef pthread_t osthread_t;
void thread_start(osthread_t* t, void* (*fn)(void*), void* arg)
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setstacksize(&attr, 128 << 10);
if (pthread_create(t, &attr, fn, arg))
exitf("pthread_create failed");
pthread_attr_destroy(&attr);
}
struct event_t {
pthread_mutex_t mu;
pthread_cond_t cv;
bool state;
};
void event_init(event_t* ev)
{
if (pthread_mutex_init(&ev->mu, 0))
fail("pthread_mutex_init failed");
if (pthread_cond_init(&ev->cv, 0))
fail("pthread_cond_init failed");
ev->state = false;
}
void event_reset(event_t* ev)
{
ev->state = false;
}
void event_set(event_t* ev)
{
pthread_mutex_lock(&ev->mu);
if (ev->state)
fail("event already set");
ev->state = true;
pthread_mutex_unlock(&ev->mu);
pthread_cond_broadcast(&ev->cv);
}
void event_wait(event_t* ev)
{
pthread_mutex_lock(&ev->mu);
while (!ev->state)
pthread_cond_wait(&ev->cv, &ev->mu);
pthread_mutex_unlock(&ev->mu);
}
bool event_isset(event_t* ev)
{
pthread_mutex_lock(&ev->mu);
bool res = ev->state;
pthread_mutex_unlock(&ev->mu);
return res;
}
bool event_timedwait(event_t* ev, uint64 timeout_ms)
{
pthread_mutex_lock(&ev->mu);
uint64 start = current_time_ms();
for (;;) {
if (ev->state)
break;
uint64 now = current_time_ms();
if (now - start > timeout_ms)
break;
timespec ts;
ts.tv_sec = 0;
ts.tv_nsec = (timeout_ms - (now - start)) * 1000 * 1000;
pthread_cond_timedwait(&ev->cv, &ev->mu, &ts);
}
bool res = ev->state;
pthread_mutex_unlock(&ev->mu);
return res;
}
|
