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
|
//==========================================================================
//
// net/timers.c
//
// Stand-alone networking support for RedBoot
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s): gthomas
// Contributors: gthomas
// Date: 2000-07-14
// Purpose:
// Description:
//
// This code is part of RedBoot (tm).
//
//####DESCRIPTIONEND####
//
//==========================================================================
#include <net/net.h>
static timer_t *tmr_list;
/*
* Set a timer. Caller is responsible for providing the timer_t struct.
*/
void
__timer_set(timer_t *t, unsigned long delay,
tmr_handler_t handler, void *user_data)
{
timer_t *p;
t->delay = delay;
t->start = MS_TICKS();
t->handler = handler;
t->user_data = user_data;
for (p = tmr_list; p; p = p->next)
if (p == t) {
return;
}
t->next = tmr_list;
tmr_list = t;
}
/*
* Remove a given timer from timer list.
*/
void
__timer_cancel(timer_t *t)
{
timer_t *prev, *p;
for (prev = NULL, p = tmr_list; p; prev = p, p = p->next)
if (p == t) {
if (prev)
prev->next = p->next;
else
tmr_list = p->next;
return;
}
}
/*
* Poll timer list for timer expirations.
*/
void
__timer_poll(void)
{
timer_t *prev, *t;
prev = NULL;
t = tmr_list;
while (t) {
if ((MS_TICKS_DELAY() - t->start) >= t->delay) {
/* remove it before calling handler */
if (prev)
prev->next = t->next;
else
tmr_list = t->next;
/* now, call the handler */
t->handler(t->user_data);
/*
* handler may be time consuming, so start
* from beginning of list.
*/
prev = NULL;
t = tmr_list;
} else {
prev = t;
t = t->next;
}
}
}
|
