Mercurial > flash_v2

annotate packages/redboot/current/src/net/timers.c @ 210:d2c90368aeef

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Merge from eCos master repository on 2002-05-23-21:39:14-BST
author jlarmour
date Thu, 23 May 2002 22:59:51 +0000
parents e0c0827131d1
children 60ed8b1b4c32
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1 //==========================================================================
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2 //
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3 // net/timers.c
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4 //
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5 // Stand-alone networking support for RedBoot
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6 //
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7 //==========================================================================
208
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8 //####ECOSGPLCOPYRIGHTBEGIN####
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9 // -------------------------------------------
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10 // This file is part of eCos, the Embedded Configurable Operating System.
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11 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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12 //
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13 // eCos is free software; you can redistribute it and/or modify it under
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14 // the terms of the GNU General Public License as published by the Free
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15 // Software Foundation; either version 2 or (at your option) any later version.
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16 //
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17 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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18 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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19 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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20 // for more details.
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21 //
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22 // You should have received a copy of the GNU General Public License along
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23 // with eCos; if not, write to the Free Software Foundation, Inc.,
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24 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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25 //
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26 // As a special exception, if other files instantiate templates or use macros
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27 // or inline functions from this file, or you compile this file and link it
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28 // with other works to produce a work based on this file, this file does not
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29 // by itself cause the resulting work to be covered by the GNU General Public
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30 // License. However the source code for this file must still be made available
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31 // in accordance with section (3) of the GNU General Public License.
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32 //
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33 // This exception does not invalidate any other reasons why a work based on
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34 // this file might be covered by the GNU General Public License.
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35 //
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36 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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37 // at http://sources.redhat.com/ecos/ecos-license/
208
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38 // -------------------------------------------
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39 //####ECOSGPLCOPYRIGHTEND####
115
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): gthomas
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44 // Contributors: gthomas
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45 // Date: 2000-07-14
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46 // Purpose:
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47 // Description:
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48 //
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49 // This code is part of RedBoot (tm).
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50 //
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51 //####DESCRIPTIONEND####
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52 //
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53 //==========================================================================
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54
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55 #include <net/net.h>
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56
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57 static timer_t *tmr_list;
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58
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59
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60 /*
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61 * Set a timer. Caller is responsible for providing the timer_t struct.
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62 */
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63 void
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64 __timer_set(timer_t *t, unsigned long delay,
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65 tmr_handler_t handler, void *user_data)
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66 {
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67 timer_t *p;
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68
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69 t->delay = delay;
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70 t->start = MS_TICKS();
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71 t->handler = handler;
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72 t->user_data = user_data;
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73
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74 for (p = tmr_list; p; p = p->next)
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75 if (p == t) {
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76 return;
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77 }
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78
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79 t->next = tmr_list;
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80 tmr_list = t;
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81 }
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82
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83
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84 /*
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85 * Remove a given timer from timer list.
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86 */
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87 void
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88 __timer_cancel(timer_t *t)
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89 {
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90 timer_t *prev, *p;
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91
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92 for (prev = NULL, p = tmr_list; p; prev = p, p = p->next)
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93 if (p == t) {
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94 if (prev)
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95 prev->next = p->next;
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96 else
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97 tmr_list = p->next;
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98 return;
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99 }
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100 }
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101
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102
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103 /*
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104 * Poll timer list for timer expirations.
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105 */
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106 void
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107 __timer_poll(void)
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108 {
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109 timer_t *prev, *t;
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110
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111 prev = NULL;
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112 t = tmr_list;
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113 while (t) {
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114 if ((MS_TICKS() - t->start) >= t->delay) {
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115
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116 /* remove it before calling handler */
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117 if (prev)
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118 prev->next = t->next;
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119 else
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120 tmr_list = t->next;
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121 /* now, call the handler */
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122 t->handler(t->user_data);
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123
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124 /*
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125 * handler may be time consuming, so start
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126 * from beginning of list.
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127 */
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128 prev = NULL;
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129 t = tmr_list;
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130 } else {
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131 prev = t;
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132 t = t->next;
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133 }
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134 }
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135 }