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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 Cygnus 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 "AS IS" |
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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 Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //=========================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): hmt |
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33 // Contributors: hmt |
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34 // Date: 1998-03-13 |
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35 // Purpose: uITRON compatibility functions |
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36 // Description: |
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37 // |
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38 //####DESCRIPTIONEND#### |
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39 // |
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40 //=========================================================================== |
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41 |
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42 #include <pkgconf/uitron.h> // uITRON setup CYGNUM_UITRON_SEMAS |
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43 // CYGPKG_UITRON et al |
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44 |
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45 #ifdef CYGPKG_UITRON |
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46 |
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47 // invoke the inline function definition to create static C linkage |
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48 // functions here: |
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49 #define CYGPRI_UITRON_FUNCS_HERE_AND_NOW |
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50 #include <cyg/compat/uitron/uit_func.h> |
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51 |
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52 cyg_uint32 cyg_uitron_dis_dsp_old_priority = 0; |
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53 |
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54 // ------------------------------------------------------------------------ |
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55 // STARTUP |
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56 // this routine is outside the uITRON specification; call it from |
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57 // cyg_start(), cyg_package_start(), cyg_prestart() or cyg_user_start() |
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58 // to start the uITRON tasks and scheduler. |
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59 |
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60 #if CYGNUM_UITRON_START_TASKS < 0 |
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61 #error CYGNUM_UITRON_START_TASKS should be >= 0 |
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62 #endif |
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63 |
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64 #if CYGNUM_UITRON_START_TASKS == 0 |
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65 #define START_TASKS CYGNUM_UITRON_TASKS |
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66 #else |
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67 #define START_TASKS CYGNUM_UITRON_START_TASKS |
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68 #endif |
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69 |
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70 #ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE |
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71 #if START_TASKS > CYGNUM_UITRON_TASKS_INITIALLY |
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72 #undef START_TASKS |
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73 #define START_TASKS CYGNUM_UITRON_TASKS_INITIALLY |
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74 #endif |
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75 #endif |
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76 |
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77 #if START_TASKS > CYGNUM_UITRON_TASKS |
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78 #undef START_TASKS |
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79 #define START_TASKS CYGNUM_UITRON_TASKS |
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80 #endif |
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81 |
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82 #if START_TASKS <= 0 |
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83 #error Number of uITRON tasks to start initially must be >= 0 |
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84 #endif |
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85 |
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86 |
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87 #define SET_UP_PTRS( _which_ ) CYG_MACRO_START \ |
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88 for ( i = 0; \ |
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89 (i < CYGNUM_UITRON_ ## _which_ ## _INITIALLY) && \ |
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90 (i < CYGNUM_UITRON_ ## _which_ ) ; \ |
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91 i++ ) { \ |
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92 CYG_UITRON_PTRS( _which_ )[ i ] = CYG_UITRON_OBJS( _which_ ) + i; \ |
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93 } \ |
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94 if ( (CYGNUM_UITRON_ ## _which_ ## _INITIALLY) \ |
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95 < (CYGNUM_UITRON_ ## _which_) ) \ |
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96 for ( /* i as is */; i < CYGNUM_UITRON_ ## _which_ ; i++ ) { \ |
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97 CYG_UITRON_PTRS( _which_ )[ i ] = NULL; \ |
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98 } \ |
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99 CYG_MACRO_END |
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100 |
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101 void cyg_uitron_start( void ) |
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102 { |
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103 cyg_int32 i; |
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104 for ( i = 0; i < START_TASKS; i++ ) { |
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105 #ifdef CYGIMP_THREAD_PRIORITY |
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106 // save the initial priority in our private array |
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107 cyg_uitron_task_initial_priorities[ i ] = |
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108 cyg_uitron_TASKS[ i ].get_priority(); |
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109 #endif |
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110 // and awaken the task: |
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111 cyg_uitron_TASKS[ i ].resume(); |
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112 } |
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113 for ( /* i as is */; i < CYGNUM_UITRON_TASKS; i++ ) { |
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114 #ifdef CYGIMP_THREAD_PRIORITY |
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115 // save the initial priority in our private array |
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116 cyg_uitron_task_initial_priorities[ i ] = |
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117 cyg_uitron_TASKS[ i ].get_priority(); |
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118 #endif |
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119 // but ensure the task state is dormant. |
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120 cyg_uitron_TASKS[ i ].kill(); |
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121 } |
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122 |
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123 #ifdef CYGPKG_UITRON_TASKS_CREATE_DELETE |
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124 SET_UP_PTRS( TASKS ); |
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125 #endif |
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126 #ifdef CYGPKG_UITRON_SEMAS_CREATE_DELETE |
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127 SET_UP_PTRS( SEMAS ); |
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128 #endif |
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129 #ifdef CYGPKG_UITRON_MBOXES_CREATE_DELETE |
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130 SET_UP_PTRS( MBOXES ); |
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131 #endif |
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132 #ifdef CYGPKG_UITRON_FLAGS_CREATE_DELETE |
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133 SET_UP_PTRS( FLAGS ); |
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134 #endif |
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135 #ifdef CYGPKG_UITRON_MEMPOOLFIXED_CREATE_DELETE |
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136 SET_UP_PTRS( MEMPOOLFIXED ); |
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137 #endif |
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138 #ifdef CYGPKG_UITRON_MEMPOOLVAR_CREATE_DELETE |
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139 SET_UP_PTRS( MEMPOOLVAR ); |
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140 #endif |
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141 } |
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142 |
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143 // These allow programs to link when cyg_uitron_start() is called |
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144 // (often because of CYGSEM_START_UITRON_COMPATIBILITY from infra, |
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145 // though we define these regardless just in case) |
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146 // even when there is no interest in uITRON and so the tasks are |
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147 // not externally defined; the reference to cyg_uitron_start() |
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148 // ensures the tasks array et al are still included... |
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149 extern "C" { |
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150 void task1( unsigned int arg ) CYGBLD_ATTRIB_WEAK; |
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151 void task2( unsigned int arg ) CYGBLD_ATTRIB_WEAK; |
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152 void task3( unsigned int arg ) CYGBLD_ATTRIB_WEAK; |
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153 void task4( unsigned int arg ) CYGBLD_ATTRIB_WEAK; |
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154 } |
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155 |
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156 void task1( unsigned int arg ) {} |
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157 void task2( unsigned int arg ) {} |
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158 void task3( unsigned int arg ) {} |
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159 void task4( unsigned int arg ) {} |
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160 |
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161 #endif // CYGPKG_UITRON |
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162 |
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163 // EOF uit_func.cxx |
