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Merge from eCos master repository on 2002-05-20-20:11:54-BST
author jlarmour
date Mon, 20 May 2002 22:19:26 +0000
parents bf00f99aec69
children d2c90368aeef
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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 //==========================================================================
208
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11 //####ECOSGPLCOPYRIGHTBEGIN####
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12 // -------------------------------------------
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13 // This file is part of eCos, the Embedded Configurable Operating System.
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14 // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc.
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15 //
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16 // eCos is free software; you can redistribute it and/or modify it under
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17 // the terms of the GNU General Public License as published by the Free
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18 // Software Foundation; either version 2 or (at your option) any later version.
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19 //
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20 // eCos is distributed in the hope that it will be useful, but WITHOUT ANY
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21 // WARRANTY; without even the implied warranty of MERCHANTABILITY or
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22 // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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23 // for more details.
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24 //
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25 // You should have received a copy of the GNU General Public License along
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26 // with eCos; if not, write to the Free Software Foundation, Inc.,
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27 // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
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28 //
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29 // As a special exception, if other files instantiate templates or use macros
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30 // or inline functions from this file, or you compile this file and link it
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31 // with other works to produce a work based on this file, this file does not
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32 // by itself cause the resulting work to be covered by the GNU General Public
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33 // License. However the source code for this file must still be made available
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34 // in accordance with section (3) of the GNU General Public License.
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35 //
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36 // This exception does not invalidate any other reasons why a work based on
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37 // this file might be covered by the GNU General Public License.
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38 //
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39 // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc.
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40 // at http://sources.redhat.com/ecos/ecos-license
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41 // -------------------------------------------
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42 //####ECOSGPLCOPYRIGHTEND####
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43 //==========================================================================
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44 //#####DESCRIPTIONBEGIN####
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45 //
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46 // Author(s): nickg
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47 // Contributors: nickg
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48 // Date: 1997-09-30
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49 // Purpose: Define Clock and Alarm class inlines
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50 // Description: Define inline functions for counter, clock and alarm
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51 // classes.
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52 // Usage: #include <cyg/kernel/clock.hxx>
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53 // #include <cyg/kernel/clock.inl>
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54 //
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55 //####DESCRIPTIONEND####
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56 //
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57 //==========================================================================
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58
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59 #include <cyg/kernel/clock.hxx>
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60
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61 // -------------------------------------------------------------------------
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62 // -------------------------------------------------------------------------
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63 // Counter class inlines
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64
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65 // Return current value of counter
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66 inline cyg_tick_count Cyg_Counter::current_value()
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67 {
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68 return counter;
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69 }
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70
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71 inline cyg_uint32 Cyg_Counter::current_value_lo()
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72 {
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73 return counter&0xFFFFFFFF;
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74 }
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75
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76 inline cyg_uint32 Cyg_Counter::current_value_hi()
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77 {
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78 return (counter>>32)&0xFFFFFFFF;
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79 }
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80
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81 // Set the counter's current value
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82 inline void Cyg_Counter::set_value( cyg_tick_count new_value)
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83 {
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84 counter = new_value;
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85 }
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86
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87 // -------------------------------------------------------------------------
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88 // -------------------------------------------------------------------------
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89 // Clock class inlines
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90
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91 // Return current resolution
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92 inline Cyg_Clock::cyg_resolution Cyg_Clock::get_resolution()
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93 {
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94 return resolution;
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95 }
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96
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97 // Set new resolution
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98 inline void Cyg_Clock::set_resolution(
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99 Cyg_Clock::cyg_resolution new_resolution
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100 )
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101 {
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102 resolution = new_resolution;
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103 }
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104
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105 inline cyg_tick_count Cyg_Clock::convert(
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106 cyg_tick_count value,
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107 struct converter *pcc )
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108 {
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109 cyg_uint64 t = (cyg_uint64)value;
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110 // Do this in an order to prevent overflow at the expense of
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111 // accuracy:
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112 t *= pcc->mul1;
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113 t += pcc->div1 / 2;
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114 t /= pcc->div1;
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115 t *= pcc->mul2;
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116 t += pcc->div2 / 2;
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117 t /= pcc->div2;
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118 // The alternative would be to do the 2 multiplies first
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119 // for smaller arguments.
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120 return (cyg_tick_count)t;
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121 }
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122
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123 // -------------------------------------------------------------------------
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124 // -------------------------------------------------------------------------
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125 // Alarm inlines
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126
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127 // Ensure alarm disabled
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128 inline void Cyg_Alarm::disable()
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129 {
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130 if( enabled ) counter->rem_alarm(this);
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131 }
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132
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133
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134 // -------------------------------------------------------------------------
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135 #endif // ifndef CYGONCE_KERNEL_CLOCK_INL
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136 // EOF clock.inl