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
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
|
/*
* BIRD -- Timers
*
* (c) 2013--2017 Ondrej Zajicek <santiago@crfreenet.org>
* (c) 2013--2017 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#include <stdlib.h>
#include "nest/bird.h"
#include "lib/heap.h"
#include "lib/resource.h"
#include "lib/timer.h"
struct timeloop main_timeloop;
#ifdef USE_PTHREADS
#include <pthread.h>
/* Data accessed and modified from proto/bfd/io.c */
pthread_key_t current_time_key;
static inline struct timeloop *
timeloop_current(void)
{
return pthread_getspecific(current_time_key);
}
static inline void
timeloop_init_current(void)
{
pthread_key_create(¤t_time_key, NULL);
pthread_setspecific(current_time_key, &main_timeloop);
}
void wakeup_kick_current(void);
#else
/* Just use main timelooop */
static inline struct timeloop * timeloop_current(void) { return &main_timeloop; }
static inline void timeloop_init_current(void) { }
#endif
btime
current_time(void)
{
return timeloop_current()->last_time;
}
#define TIMER_LESS(a,b) ((a)->expires < (b)->expires)
#define TIMER_SWAP(heap,a,b,t) (t = heap[a], heap[a] = heap[b], heap[b] = t, \
heap[a]->index = (a), heap[b]->index = (b))
static void
tm2_free(resource *r)
{
timer2 *t = (timer2 *) r;
tm2_stop(t);
}
static void
tm2_dump(resource *r)
{
timer2 *t = (timer2 *) r;
debug("(code %p, data %p, ", t->hook, t->data);
if (t->randomize)
debug("rand %d, ", t->randomize);
if (t->recurrent)
debug("recur %d, ", t->recurrent);
if (t->expires)
debug("expires in %d ms)\n", (t->expires - current_time()) TO_MS);
else
debug("inactive)\n");
}
static struct resclass tm2_class = {
"Timer",
sizeof(timer2),
tm2_free,
tm2_dump,
NULL,
NULL
};
timer2 *
tm2_new(pool *p)
{
timer2 *t = ralloc(p, &tm2_class);
t->index = -1;
return t;
}
void
tm2_set(timer2 *t, btime when)
{
struct timeloop *loop = timeloop_current();
uint tc = timers_count(loop);
if (!t->expires)
{
t->index = ++tc;
t->expires = when;
BUFFER_PUSH(loop->timers) = t;
HEAP_INSERT(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP);
}
else if (t->expires < when)
{
t->expires = when;
HEAP_INCREASE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
}
else if (t->expires > when)
{
t->expires = when;
HEAP_DECREASE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
}
#ifdef CONFIG_BFD
/* Hack to notify BFD loops */
if ((loop != &main_timeloop) && (t->index == 1))
wakeup_kick_current();
#endif
}
void
tm2_start(timer2 *t, btime after)
{
tm2_set(t, current_time() + MAX(after, 0));
}
void
tm2_stop(timer2 *t)
{
if (!t->expires)
return;
struct timeloop *loop = timeloop_current();
uint tc = timers_count(loop);
HEAP_DELETE(loop->timers.data, tc, timer2 *, TIMER_LESS, TIMER_SWAP, t->index);
BUFFER_POP(loop->timers);
t->index = -1;
t->expires = 0;
}
void
timers_init(struct timeloop *loop, pool *p)
{
times_init(loop);
BUFFER_INIT(loop->timers, p, 4);
BUFFER_PUSH(loop->timers) = NULL;
}
void
timers_fire(struct timeloop *loop)
{
btime base_time;
timer2 *t;
times_update(loop);
base_time = loop->last_time;
while (t = timers_first(loop))
{
if (t->expires > base_time)
return;
if (t->recurrent)
{
btime when = t->expires + t->recurrent;
if (when <= loop->last_time)
when = loop->last_time + t->recurrent;
if (t->randomize)
when += random() % (t->randomize + 1);
tm2_set(t, when);
}
else
tm2_stop(t);
t->hook(t);
}
}
void
timer_init(void)
{
timers_init(&main_timeloop, &root_pool);
timeloop_init_current();
}
|
