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annotate packages/compat/uitron/current/src/uit_func.cxx @ 64:c38311975d4f ecos-sw-2000-01-28

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Merge from eCos master repository on 2000-01-28-04:28:11-GMT
author jlarmour
date Fri, 28 Jan 2000 04:59:39 +0000
parents 443894e2e912
children bf00f99aec69
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1 //===========================================================================
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2 //
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3 // uit_func.cxx
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4 //
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5 // uITRON compatibility functions
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6 //
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7 //===========================================================================
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8 //####COPYRIGHTBEGIN####
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9 //
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10 // -------------------------------------------
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11 // The contents of this file are subject to the Red Hat eCos Public License
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12 // Version 1.0 (the "License"); you may not use this file except in
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13 // compliance with the License. You may obtain a copy of the License at
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14 // http://sourceware.cygnus.com/ecos
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15 //
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16 // Software distributed under the License is distributed on an
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
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18 // License for the specific language governing rights and limitations under
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19 // the License.
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20 //
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21 // The Original Code is eCos - Embedded Configurable Operating System,
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22 // released September 30, 1998.
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23 //
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24 // The Initial Developer of the Original Code is Red Hat.
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25 // Portions created by Red Hat are
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26 // Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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27 // All Rights Reserved.
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28 // -------------------------------------------
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29 //
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30 //####COPYRIGHTEND####
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31 //===========================================================================
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32 //#####DESCRIPTIONBEGIN####
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33 //
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34 // Author(s): hmt
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35 // Contributors: hmt
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36 // Date: 1998-03-13
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37 // Purpose: uITRON compatibility functions
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38 // Description:
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39 //
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40 //####DESCRIPTIONEND####
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41 //
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42 //===========================================================================
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43
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44 #include <pkgconf/uitron.h> // uITRON setup CYGNUM_UITRON_SEMAS
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45 // CYGPKG_UITRON et al
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46
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47 #ifdef CYGPKG_UITRON
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48
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49 // invoke the inline function definition to create static C linkage
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50 // functions here:
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51 #define CYGPRI_UITRON_FUNCS_HERE_AND_NOW
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52 #include <cyg/compat/uitron/uit_func.h>
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53
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54 cyg_uint32 cyg_uitron_dis_dsp_old_priority = 0;
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55
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56 // ------------------------------------------------------------------------
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57 // STARTUP
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58 // this routine is outside the uITRON specification; call it from
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59 // cyg_start(), cyg_package_start(), cyg_prestart() or cyg_user_start()
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60 // to start the uITRON tasks and scheduler.
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61
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62 #if CYGNUM_UITRON_START_TASKS < 0
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63 #error CYGNUM_UITRON_START_TASKS should be >= 0
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64 #endif
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65
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66 #if CYGNUM_UITRON_START_TASKS == 0
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67 #define START_TASKS CYGNUM_UITRON_TASKS
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68 #else
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69 #define START_TASKS CYGNUM_UITRON_START_TASKS
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70 #endif
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71
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72 #ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE
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73 #if START_TASKS > CYGNUM_UITRON_TASKS_INITIALLY
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74 #undef START_TASKS
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75 #define START_TASKS CYGNUM_UITRON_TASKS_INITIALLY
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76 #endif
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77 #endif
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78
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79 #if START_TASKS > CYGNUM_UITRON_TASKS
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80 #undef START_TASKS
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81 #define START_TASKS CYGNUM_UITRON_TASKS
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82 #endif
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83
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84 #if START_TASKS <= 0
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85 #error Number of uITRON tasks to start initially must be >= 0
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86 #endif
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87
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88
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89 #define SET_UP_PTRS( _which_ ) CYG_MACRO_START \
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90 for ( i = 0; \
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91 (i < CYGNUM_UITRON_ ## _which_ ## _INITIALLY) && \
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92 (i < CYGNUM_UITRON_ ## _which_ ) ; \
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93 i++ ) { \
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94 CYG_UITRON_PTRS( _which_ )[ i ] = CYG_UITRON_OBJS( _which_ ) + i; \
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95 } \
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96 if ( (CYGNUM_UITRON_ ## _which_ ## _INITIALLY) \
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97 < (CYGNUM_UITRON_ ## _which_) ) \
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98 for ( /* i as is */; i < CYGNUM_UITRON_ ## _which_ ; i++ ) { \
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99 CYG_UITRON_PTRS( _which_ )[ i ] = NULL; \
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100 } \
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101 CYG_MACRO_END
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102
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103 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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104 #ifdef CYGSEM_UITRON_TIME_IS_MILLISECONDS
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105 Cyg_Clock::converter uit_clock_to_system;
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106 Cyg_Clock::converter uit_clock_from_system;
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107 #endif
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108 #endif
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109
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110 void cyg_uitron_start( void )
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111 {
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112 cyg_int32 i;
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113
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114 #ifdef CYGVAR_KERNEL_COUNTERS_CLOCK
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115 #ifdef CYGSEM_UITRON_TIME_IS_MILLISECONDS
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116 // initialize the clock converters
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117 Cyg_Clock::real_time_clock->
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118 get_other_to_clock_converter( 1000000, &uit_clock_to_system );
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119 Cyg_Clock::real_time_clock->
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120 get_clock_to_other_converter( 1000000, &uit_clock_from_system );
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121 #endif
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122 #endif
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123
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124 for ( i = 0; i < START_TASKS; i++ ) {
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125 #ifdef CYGIMP_THREAD_PRIORITY
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126 // save the initial priority in our private array
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127 cyg_uitron_task_initial_priorities[ i ] =
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128 cyg_uitron_TASKS[ i ].get_priority();
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129 #endif
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130 // and awaken the task:
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131 cyg_uitron_TASKS[ i ].resume();
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132 }
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133 for ( /* i as is */; i < CYGNUM_UITRON_TASKS; i++ ) {
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134 #ifdef CYGIMP_THREAD_PRIORITY
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135 // save the initial priority in our private array
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136 cyg_uitron_task_initial_priorities[ i ] =
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137 cyg_uitron_TASKS[ i ].get_priority();
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138 #endif
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139 // but ensure the task state is dormant.
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140 cyg_uitron_TASKS[ i ].kill();
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141 }
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142
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143 #ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE
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144 SET_UP_PTRS( TASKS );
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145 #endif
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146 #ifdef CYGPKG_UITRON_SEMAS_CREATE_DELETE
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147 SET_UP_PTRS( SEMAS );
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148 #endif
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149 #ifdef CYGPKG_UITRON_MBOXES_CREATE_DELETE
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150 SET_UP_PTRS( MBOXES );
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151 #endif
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152 #ifdef CYGPKG_UITRON_FLAGS_CREATE_DELETE
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153 SET_UP_PTRS( FLAGS );
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154 #endif
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155 #ifdef CYGPKG_UITRON_MEMPOOLFIXED_CREATE_DELETE
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156 SET_UP_PTRS( MEMPOOLFIXED );
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157 #endif
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158 #ifdef CYGPKG_UITRON_MEMPOOLVAR_CREATE_DELETE
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159 SET_UP_PTRS( MEMPOOLVAR );
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160 #endif
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161 }
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162
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163 // These allow programs to link when cyg_uitron_start() is called
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164 // (often because of CYGSEM_START_UITRON_COMPATIBILITY from infra,
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165 // though we define these regardless just in case)
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166 // even when there is no interest in uITRON and so the tasks are
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167 // not externally defined; the reference to cyg_uitron_start()
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168 // ensures the tasks array et al are still included...
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169 extern "C" {
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170 void task1( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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171 void task2( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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172 void task3( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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173 void task4( unsigned int arg ) CYGBLD_ATTRIB_WEAK;
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174 }
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175
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176 void task1( unsigned int arg ) {}
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177 void task2( unsigned int arg ) {}
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178 void task3( unsigned int arg ) {}
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179 void task4( unsigned int arg ) {}
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180
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181 #endif // CYGPKG_UITRON
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182
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183 // EOF uit_func.cxx