forked from huoyang11/userpro
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathtimer.c
More file actions
executable file
·108 lines (85 loc) · 2.53 KB
/
timer.c
File metadata and controls
executable file
·108 lines (85 loc) · 2.53 KB
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
#include "timer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/epoll.h>
#include <unistd.h>
int init_timer(struct timer_struct *p, int cycle_time) {
if (p == NULL) {
return -1;
}
p->epfd = epoll_create(1); //这里里面维护了一个epfd
p->cycle_time = cycle_time;
p->isstop = 0; //定时器是否停止
queue_init(&p->timer_queue); //初始化队列
return 0;
}
//添加到定时器当中
int add_timer(struct timer_struct *p, int cycle, void (*call_back)(void *),
void *arg) {
if (p == NULL) {
return -1;
}
struct timer_data *data = calloc(1, sizeof(struct timer_data));
if (data == NULL) {
return -2;
}
data->arg = arg;
data->call_back = call_back;
data->cycle = cycle;
data->time = cycle;
queue_push(&p->timer_queue, &data->qnode); //添加到定时器队列中
return 0;
}
// 运行定时器
int run_timer(struct timer_struct *p) {
if (p == NULL) {
return -1;
}
queue_node *current_node = NULL;
struct timer_data *current = NULL;
struct epoll_event evs[1];
while (!p->isstop) {
epoll_wait(p->epfd, evs, 1, p->cycle_time); // cycle_time是超时时间
current_node = p->timer_queue.head;
current = GET_STRUCT_START_ADDR(struct timer_data, qnode, current_node);
if (queue_isempty(&p->timer_queue)) {
continue;
}
while (current != NULL) {
current->time -= p->cycle_time;
if (current->time <= 0) {
// 时间到了，那么执行任务
current->call_back(current->arg);
current->time = current->cycle;
}
//接着这个桶中其他节点有没有到时了
current_node = current->qnode.next;
if (current_node == NULL) {
break;
}
current =
GET_STRUCT_START_ADDR(struct timer_data, qnode, current_node);
}
}
return 0;
}
int stop_timer(struct timer_struct *p) {
if (p == NULL) {
return -1;
}
p->isstop = 1;
return 0;
}
int uninit_timer(struct timer_struct *p) {
if (p == NULL) {
return -1;
}
close(p->epfd);
p->isstop = 1;
while (!queue_isempty(&p->timer_queue)) {
queue_pop(&p->timer_queue, NULL);
}
queue_uninit(&p->timer_queue);
return 0;
}