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annotate packages/kernel/current/include/clock.inl @ 115:6ed91473a1cd ecos-sw-2000-08-21

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Merge from eCos master repository on 2000-08-21-22:40:54-BST
author jlarmour
date Fri, 25 Aug 2000 17:32:38 +0000
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1 #ifndef CYGONCE_KERNEL_CLOCK_INL
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2 #define CYGONCE_KERNEL_CLOCK_INL
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3
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4 //==========================================================================
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5 //
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6 // clock.inl
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7 //
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8 // Clock and Alarm class inlines
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9 //
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10 //==========================================================================
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11 //####COPYRIGHTBEGIN####
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12 //
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13 // -------------------------------------------
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14 // The contents of this file are subject to the Red Hat eCos Public License
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15 // Version 1.1 (the "License"); you may not use this file except in
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16 // compliance with the License. You may obtain a copy of the License at
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17 // http://www.redhat.com/
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18 //
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19 // Software distributed under the License is distributed on an "AS IS"
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20 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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21 // License for the specific language governing rights and limitations under
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22 // the License.
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23 //
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24 // The Original Code is eCos - Embedded Configurable Operating System,
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25 // released September 30, 1998.
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26 //
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27 // The Initial Developer of the Original Code is Red Hat.
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28 // Portions created by Red Hat are
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29 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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30 // All Rights Reserved.
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31 // -------------------------------------------
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32 //
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33 //####COPYRIGHTEND####
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34 //==========================================================================
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35 //#####DESCRIPTIONBEGIN####
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36 //
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37 // Author(s): nickg
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38 // Contributors: nickg
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39 // Date: 1997-09-30
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40 // Purpose: Define Clock and Alarm class inlines
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41 // Description: Define inline functions for counter, clock and alarm
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42 // classes.
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43 // Usage: #include <cyg/kernel/clock.hxx>
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44 // #include <cyg/kernel/clock.inl>
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45 //
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46 //####DESCRIPTIONEND####
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47 //
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48 //==========================================================================
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49
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50 #include <cyg/kernel/clock.hxx>
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51
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52 // -------------------------------------------------------------------------
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53 // -------------------------------------------------------------------------
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54 // Counter class inlines
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55
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56 // Return current value of counter
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57 inline cyg_tick_count Cyg_Counter::current_value()
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58 {
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59 return counter;
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60 }
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61
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62 inline cyg_uint32 Cyg_Counter::current_value_lo()
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63 {
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64 return counter&0xFFFFFFFF;
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65 }
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66
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67 inline cyg_uint32 Cyg_Counter::current_value_hi()
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68 {
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69 return (counter>>32)&0xFFFFFFFF;
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70 }
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71
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72 // Set the counter's current value
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73 inline void Cyg_Counter::set_value( cyg_tick_count new_value)
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74 {
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75 counter = new_value;
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76 }
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77
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78 // -------------------------------------------------------------------------
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79 // -------------------------------------------------------------------------
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80 // Clock class inlines
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81
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82 // Return current resolution
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83 inline Cyg_Clock::cyg_resolution Cyg_Clock::get_resolution()
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84 {
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85 return resolution;
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86 }
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87
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88 // Set new resolution
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89 inline void Cyg_Clock::set_resolution(
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90 Cyg_Clock::cyg_resolution new_resolution
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91 )
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92 {
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93 resolution = new_resolution;
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94 }
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95
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96 inline cyg_tick_count Cyg_Clock::convert(
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97 cyg_tick_count value,
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98 struct converter *pcc )
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99 {
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100 cyg_uint64 t = (cyg_uint64)value;
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101 // Do this in an order to prevent overflow at the expense of
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102 // accuracy:
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103 t *= pcc->mul1;
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104 t += pcc->div1 / 2;
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105 t /= pcc->div1;
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106 t *= pcc->mul2;
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107 t += pcc->div2 / 2;
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108 t /= pcc->div2;
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109 // The alternative would be to do the 2 multiplies first
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110 // for smaller arguments.
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111 return (cyg_tick_count)t;
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112 }
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113
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114 // -------------------------------------------------------------------------
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115 // -------------------------------------------------------------------------
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116 // Alarm inlines
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117
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118 // Ensure alarm disabled
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119 inline void Cyg_Alarm::disable()
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120 {
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121 if( enabled ) counter->rem_alarm(this);
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122 }
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123
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124
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125 // -------------------------------------------------------------------------
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126 #endif // ifndef CYGONCE_KERNEL_CLOCK_INL
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127 // EOF clock.inl