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annotate packages/kernel/current/tests/kmutex4.c @ 1507:92cf4ff674de

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* tests/kmutex3.c (cyg_start): Use CYG_TEST_NA. * tests/kmutex4.c (cyg_start): Ditto. * tests/mutex2.cxx (cyg_start): Ditto. * tests/mutex3.cxx (cyg_start): Ditto. * tests/sync3.cxx (cyg_start): Ditto. * tests/thread2.cxx (cyg_start): Ditto. * tests/fptest.c (cyg_start): Use one line NA msg. * tests/smp.cxx (cyg_start): Ditto. * tests/timeslice.c (cyg_start): Ditto. * tests/tm_basic.cxx (cyg_start): Ditto.
author jlarmour
date Thu, 19 Feb 2004 10:57:36 +0000
parents d2c90368aeef
children 74dbf4c3f2e1
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1 //==========================================================================
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2 //
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3 // kmutex4.c
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4 //
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5 // Mutex test 4 - dynamic priority inheritance protocol
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6 //
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7 //==========================================================================
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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####
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40 //==========================================================================
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41 //#####DESCRIPTIONBEGIN####
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42 //
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43 // Author(s): hmt
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44 // Contributors: hmt
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45 // Date: 2000-01-06, 2001-08-10, 2001-08-21
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46 // Description: Tests mutex priority inheritance. This is an extension of
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47 // kmutex3.c, to test the new "set the protocol at run-time"
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48 // extensions.
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49 //####DESCRIPTIONEND####
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50
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51 #include <pkgconf/hal.h>
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52 #include <pkgconf/kernel.h>
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53
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54 #include <cyg/infra/testcase.h>
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55
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56 #include <cyg/hal/hal_arch.h> // CYGNUM_HAL_STACK_SIZE_TYPICAL
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57
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58 #include <cyg/infra/diag.h> // diag_printf
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59
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60 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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61 externC void
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62 cyg_hal_invoke_constructors();
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63 #endif
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64
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65 // ------------------------------------------------------------------------
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66 //
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67 // These checks should be enough; any other scheduler which has priorities
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68 // should manifest as having no priority inheritance, but otherwise fine,
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69 // so the test should work correctly.
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70
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71 #if defined(CYGVAR_KERNEL_COUNTERS_CLOCK) && \
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72 (CYGNUM_KERNEL_SCHED_PRIORITIES > 20) && \
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73 defined(CYGFUN_KERNEL_API_C) && \
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74 !defined(CYGPKG_KERNEL_SMP_SUPPORT) && \
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75 defined(CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC) \
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76
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77 #include <cyg/kernel/kapi.h>
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78
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79 #include <cyg/infra/cyg_ass.h>
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80 #include <cyg/infra/cyg_trac.h>
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81 #include <cyg/infra/diag.h> // diag_printf
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82
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83 // ------------------------------------------------------------------------
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84
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85 #define nVERBOSE
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86
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87 // ------------------------------------------------------------------------
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88 // We have dynamic protocol choice, so we can set the protocol to whatever
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89 // we want. We'll do these combinations:
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90 // NONE
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91 // INHERIT
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92 // CEILING = 4 = higher than any thread === INHERIT in behaviour
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93 // CEILING = 11 = mixed in with threads === cannot check anything
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94 // CEILING = 17 = lower than any threads === NONE in behaviour
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95
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96 #define PROTO_NONE (0)
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97 #define PROTO_INHERIT (1)
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98 #define PROTO_CEILING_HIGH (2)
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99 #define PROTO_CEILING_MID (3)
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100 #define PROTO_CEILING_LOW (4)
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101
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102 int proto;
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103
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104 static char * protnames[] = {
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105 "none",
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106 "inherit",
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107 "high ceiling",
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108 "medium ceiling",
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109 "low ceiling",
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110 };
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111
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112 // ------------------------------------------------------------------------
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113 // Management functions
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114 //
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115 // Stolen from testaux.hxx and copied in here because I want to be able to
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116 // reset the world also.
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117 //
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118 // Translated into KAPI also.
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119
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120 #define NTHREADS 7
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121
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122 #define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
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123
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124 static cyg_handle_t thread[NTHREADS] = { 0 };
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125
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126 typedef cyg_uint64 CYG_ALIGNMENT_TYPE;
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127
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128 static cyg_thread thread_obj[NTHREADS];
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129
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130 static CYG_ALIGNMENT_TYPE stack[NTHREADS] [
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131 (STACKSIZE+sizeof(CYG_ALIGNMENT_TYPE)-1)
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132 / sizeof(CYG_ALIGNMENT_TYPE) ];
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133
191
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134 static volatile int nthreads = 0;
181
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135
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136 #undef NULL
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137 #define NULL (0)
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138
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139 static cyg_handle_t new_thread( cyg_thread_entry_t *entry,
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140 cyg_addrword_t data,
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141 cyg_addrword_t priority,
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142 int do_resume,
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143 char *name )
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144 {
191
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145 int _nthreads = nthreads++;
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146
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147 CYG_ASSERT(_nthreads < NTHREADS,
181
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148 "Attempt to create more than NTHREADS threads");
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149
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150 cyg_thread_create( priority,
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151 entry,
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152 data,
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153 name,
191
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154 (void *)(stack[_nthreads]),
181
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155 STACKSIZE,
191
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156 &thread[_nthreads],
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157 &thread_obj[_nthreads] );
181
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158
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159 if ( do_resume )
191
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160 cyg_thread_resume( thread[_nthreads] );
181
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161
191
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162 return thread[_nthreads];
181
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163 }
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164
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165
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166 static void kill_threads( void )
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167 {
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168 CYG_ASSERT(nthreads <= NTHREADS,
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169 "More than NTHREADS threads");
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170 CYG_ASSERT( cyg_thread_self() == thread[0],
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171 "kill_threads() not called from thread 0");
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172 while ( nthreads > 1 ) {
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173 nthreads--;
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174 if ( NULL != thread[nthreads] ) {
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175 do
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176 cyg_thread_kill( thread[nthreads] );
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177 while ( ! cyg_thread_delete ( thread[nthreads] ) );
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178 thread[nthreads] = NULL;
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179 }
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180 }
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181 CYG_ASSERT(nthreads == 1,
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182 "No threads left");
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183 }
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184
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185 // ------------------------------------------------------------------------
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186
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187 #define DELAYFACTOR 1 // for debugging
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188
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189 // ------------------------------------------------------------------------
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190
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191 static cyg_mutex_t mutex_obj;
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192 static cyg_mutex_t *mutex;
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193
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194 // These are for reporting back to the master thread
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195 volatile int got_it = 0;
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196 volatile int t3ran = 0;
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197 volatile int t3ended = 0;
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198 volatile int extras[4] = {0,0,0,0};
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199
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200 volatile int go_flag = 0; // but this one controls thread 3 from thread 2
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201
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202 // ------------------------------------------------------------------------
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203 // 0 to 3 of these run generally to interfere with the other processing,
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204 // to cause multiple prio inheritances, and clashes in any orders.
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205
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206 static void extra_thread( cyg_addrword_t data )
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207 {
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208 cyg_handle_t self = cyg_thread_self();
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209
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210
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211 #ifdef VERBOSE
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212 #define xXINFO( z ) \
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213 do { z[13] = '0' + data; CYG_TEST_INFO( z ); } while ( 0 )
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214
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215 static char running[] = "Extra thread Xa running";
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216 static char exiting[] = "Extra thread Xa exiting";
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217 static char resumed[] = "Extra thread Xa resumed";
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218 static char locked[] = "Extra thread Xa locked";
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219 static char unlocked[] = "Extra thread Xa unlocked";
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220 #else
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221 #define XINFO( z ) /* nothing */
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222 #endif
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223
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224 XINFO( running );
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225
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226 cyg_thread_suspend( self );
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227
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228 XINFO( resumed );
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229
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230 cyg_mutex_lock( mutex );
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231
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232 XINFO( locked );
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233
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234 cyg_mutex_unlock( mutex );
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235
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236 XINFO( unlocked );
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237
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238 extras[ data ] ++;
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239
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240 XINFO( exiting );
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241
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242 }
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243
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244 // ------------------------------------------------------------------------
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245
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246 static void t1( cyg_addrword_t data )
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247 {
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248 cyg_handle_t self = cyg_thread_self();
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249 #ifdef VERBOSE
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250 CYG_TEST_INFO( "Thread 1 running" );
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251 #endif
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252 cyg_thread_suspend( self );
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253
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254 cyg_mutex_lock( mutex );
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255
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256 got_it++;
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257
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258 CYG_TEST_CHECK( 0 == t3ended, "T3 ended prematurely [T1,1]" );
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259
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260 cyg_mutex_unlock( mutex );
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261
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262 CYG_TEST_CHECK( 0 == t3ended, "T3 ended prematurely [T1,2]" );
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263
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264 // That's all.
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265 #ifdef VERBOSE
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266 CYG_TEST_INFO( "Thread 1 exit" );
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267 #endif
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268 }
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269
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270 // ------------------------------------------------------------------------
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271
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272 static void t2( cyg_addrword_t data )
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273 {
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274 cyg_handle_t self = cyg_thread_self();
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275 int i;
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276 cyg_tick_count_t then, now;
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277 #ifdef VERBOSE
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278 CYG_TEST_INFO( "Thread 2 running" );
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279 #endif
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280 CYG_TEST_CHECK( 0 == (data & ~0x77), "Bad T2 arg: extra bits" );
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281 CYG_TEST_CHECK( 0 == (data & (data >> 4)), "Bad T2 arg: overlap" );
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282
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283 cyg_thread_suspend( self );
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284
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285 // depending on our config argument, optionally restart some of the
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286 // extra threads to throw noise into the scheduler:
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287 for ( i = 0; i < 3; i++ )
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288 if ( (1 << i) & data ) // bits 0-2 control
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289 cyg_thread_resume( thread[i+4] ); // extras are thread[4-6]
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290
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291 cyg_thread_delay( DELAYFACTOR * 10 ); // let those threads run
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292
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293 cyg_scheduler_lock(); // do this next lot atomically
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294
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295 go_flag = 1; // unleash thread 3
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296 cyg_thread_resume( thread[1] ); // resume thread 1
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297
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298 // depending on our config argument, optionally restart some of the
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299 // extra threads to throw noise into the scheduler at this later point:
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300 for ( i = 4; i < 7; i++ )
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301 if ( (1 << i) & data ) // bits 4-6 control
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302 cyg_thread_resume( thread[i] ); // extras are thread[4-6]
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303
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304 cyg_scheduler_unlock(); // let scheduling proceed
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305
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306 // Need a delay (but not a CPU yield) to allow t3 to awaken and act on
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307 // the go_flag, otherwise we check these details below too soon.
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308 // Actually, waiting for the clock to tick a couple of times would be
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309 // better, so that is what we will do. Must be a busy-wait.
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310 then = cyg_current_time();
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311 do {
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312 now = cyg_current_time();
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313 // Wait longer than the delay in t3 waiting on go_flag
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314 } while ( now < (then + 3) );
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315
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316 // Check for whatever result we expect from the protocol selected:
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317 // This mirrors what is done in configury in kmutex3.c and mutex3.cxx
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318 if ( PROTO_CEILING_MID == proto ) {
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319 CYG_TEST_INFO( "Not checking: ceiling mid value" );
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320 }
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321 else if ( PROTO_INHERIT == proto ||
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322 PROTO_CEILING_HIGH == proto ) {
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323 CYG_TEST_INFO( "Checking priority scheme operating" );
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324 CYG_TEST_CHECK( 1 == t3ran, "Thread 3 did not run" );
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325 CYG_TEST_CHECK( 1 == got_it, "Thread 1 did not get the mutex" );
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326 }
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327 else {
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328 CYG_TEST_INFO( "Checking NO priority scheme operating" );
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329 CYG_TEST_CHECK( 0 == t3ran, "Thread 3 DID run" );
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330 CYG_TEST_CHECK( 0 == got_it, "Thread 1 DID get the mutex" );
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331 }
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332
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333 CYG_TEST_CHECK( 0 == t3ended, "Thread 3 ended prematurely [T2,1]" );
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334
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335 cyg_thread_delay( DELAYFACTOR * 20 ); // let those threads run
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336
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337 CYG_TEST_CHECK( 1 == t3ran, "Thread 3 did not run" );
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338 CYG_TEST_CHECK( 1 == got_it, "Thread 1 did not get the mutex" );
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339 CYG_TEST_CHECK( 1 == t3ended, "Thread 3 has not ended" );
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340
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341 for ( i = 0; i < 3; i++ )
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342 if ( (1 << i) & (data | data >> 4) ) // bits 0-2 and 4-6 control
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343 CYG_TEST_CHECK( 1 == extras[i+1], "Extra thread did not run" );
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344 else
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345 CYG_TEST_CHECK( 0 == extras[i+1], "Extra thread ran" );
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346
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347 CYG_TEST_PASS( "Thread 2 exiting, AOK" );
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348 // That's all: restart the control thread.
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349 cyg_thread_resume( thread[0] );
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350 }
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351
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352 // ------------------------------------------------------------------------
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353
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354 static void t3( cyg_addrword_t data )
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355 {
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356 #ifdef VERBOSE
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357 CYG_TEST_INFO( "Thread 3 running" );
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358 #endif
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359 cyg_mutex_lock( mutex );
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360
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361 cyg_thread_delay( DELAYFACTOR * 5 ); // let thread 3a run
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362
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363 cyg_thread_resume( thread[2] ); // resume thread 2
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364
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365 while ( 0 == go_flag )
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366 cyg_thread_delay(1); // wait until we are told to go
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367
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368 t3ran ++; // record the fact
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369
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370 CYG_TEST_CHECK( 0 == got_it, "Thread 1 claims to have got my mutex" );
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371
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372 cyg_mutex_unlock( mutex );
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373
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374 t3ended ++; // record that we came back
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375
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376 CYG_TEST_CHECK( 1 == got_it, "Thread 1 did not get the mutex" );
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377 #ifdef VERBOSE
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378 CYG_TEST_INFO( "Thread 3 exit" );
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379 #endif
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380 }
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381
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382 // ------------------------------------------------------------------------
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383
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384 static void control_thread( cyg_addrword_t data )
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385 {
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386 cyg_handle_t self = cyg_thread_self();
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387 int i, z;
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388
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389 CYG_TEST_INIT();
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390 CYG_TEST_INFO( "Control Thread running" );
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391
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392 // Go through the 27 possibilities of resuming the extra threads
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393 // 0: not at all
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394 // 1: early in the process
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395 // 2: later on
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396 // which are represented by bits 0-3 and 4-6 resp in the argument to
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397 // thread 2 (none set means no resume at all).
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398 for ( i = 0; i < 27; i++ ) {
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399 static int xx[] = { 0, 1, 16 };
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400 int j = i % 3;
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401 int k = (i / 3) % 3;
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402 int l = (i / 9) % 3;
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403
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404 int d = xx[j] | (xx[k]<<1) | (xx[l]<<2) ;
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405
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406 if ( cyg_test_is_simulator && (0 != i && 13 != i && 26 != i) )
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407 continue; // 13 is 111 base 3, 26 is 222 base 3
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408
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409 // Go through all these priority inversion prevention protocols:
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410 // (if supported in this configuration)
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411 // PROTO_NONE (0)
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412 // PROTO_INHERIT (1)
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413 // PROTO_CEILING_HIGH (2)
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414 // PROTO_CEILING_MID (3)
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415 // PROTO_CEILING_LOW (4)
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416 for ( proto = PROTO_NONE; proto <= PROTO_CEILING_LOW; proto++ ) {
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417
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418 // If no priority inheritance at all, running threads 1a and 2a is
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419 // OK, but not thread 3a; it blocks the world.
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420 if ( PROTO_NONE == proto ||
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421 PROTO_CEILING_MID == proto ||
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422 PROTO_CEILING_LOW == proto )
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423 if ( l ) // Cannot run thread 3a if no
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424 continue; // priority inheritance at all.
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425
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426 mutex = &mutex_obj;
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427
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428 switch ( proto ) {
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429 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_NONE
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430 case PROTO_NONE:
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431 cyg_mutex_init( mutex );
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432 cyg_mutex_set_protocol( mutex, CYG_MUTEX_NONE );
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433 break;
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434 #endif
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435 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT
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436 case PROTO_INHERIT:
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437 cyg_mutex_init( mutex );
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438 cyg_mutex_set_protocol( mutex, CYG_MUTEX_INHERIT );
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439 break;
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440 #endif
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441 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
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442 case PROTO_CEILING_HIGH:
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443 cyg_mutex_init( mutex );
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444 cyg_mutex_set_protocol( mutex, CYG_MUTEX_CEILING );
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445 cyg_mutex_set_ceiling( mutex, (cyg_priority_t) 4 );
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446 break;
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447 case PROTO_CEILING_MID:
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448 cyg_mutex_init( mutex );
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449 cyg_mutex_set_protocol( mutex, CYG_MUTEX_CEILING );
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450 cyg_mutex_set_ceiling( mutex, (cyg_priority_t) 11 );
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451 break;
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452 case PROTO_CEILING_LOW:
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453 cyg_mutex_init( mutex );
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454 cyg_mutex_set_protocol( mutex, CYG_MUTEX_CEILING );
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455 cyg_mutex_set_ceiling( mutex, (cyg_priority_t) 17 );
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456 break;
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457 #endif
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458 default:
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459 continue; // Break out of the prio for loop - do nothing
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460 }
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461
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462 got_it = 0;
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463 t3ran = 0;
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464 t3ended = 0;
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465 for ( z = 0; z < 4; z++ ) extras[z] = 0;
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466 go_flag = 0;
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467
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468 new_thread( t1, 0, 5, 1, "test 1" ); // Slot 1
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469 new_thread( t2, d, 10, 1, "test 2" ); // Slot 2
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470 new_thread( t3, 0, 15, 1, "test 3" ); // Slot 3
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471
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472 new_thread( extra_thread, 1, 8, j, "extra 1" ); // Slot 4
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473 new_thread( extra_thread, 2, 12, k, "extra 2" ); // Slot 5
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474 new_thread( extra_thread, 3, 17, l, "extra 3" ); // Slot 6
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475
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476 {
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477 static char *a[] = { "inactive", "run early", "run late" };
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478 diag_printf( "\n----- %s [%2d] New Cycle: 0x%02x, Threads 1a %s, 2a %s, 3a %s -----\n",
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479 protnames[proto], i, d, a[j], a[k], a[l] );
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480 }
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481
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482 cyg_thread_suspend( self );
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483
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484 kill_threads();
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485 cyg_mutex_destroy( mutex );
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486 }
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487 }
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488 CYG_TEST_EXIT( "Control Thread exit" );
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489 }
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490
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491 // ------------------------------------------------------------------------
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492
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493 externC void
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494 cyg_user_start( void )
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495 {
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496 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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497 cyg_hal_invoke_constructors();
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498 #endif
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499 new_thread( control_thread, 0, 2, 1, "control thread" );
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500 }
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501
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502 #else // CYGVAR_KERNEL_COUNTERS_CLOCK &c
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503
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504 externC void
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505 cyg_start( void )
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506 {
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507 CYG_TEST_INIT();
1507
92cf4ff674de * tests/kmutex3.c (cyg_start): Use CYG_TEST_NA.
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508 CYG_TEST_INFO("KMutex4 test requires:\n"
181
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509 "CYGFUN_KERNEL_API_C &&\n"
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510 "CYGVAR_KERNEL_COUNTERS_CLOCK &&\n"
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511 "(CYGNUM_KERNEL_SCHED_PRIORITIES > 20) &&\n"
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512 "!defined(CYGPKG_KERNEL_SMP_SUPPORT) &&\n"
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513 "defined(CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC)\n"
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514 );
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92cf4ff674de * tests/kmutex3.c (cyg_start): Use CYG_TEST_NA.
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515 CYG_TEST_NA("KMutex4 test requirements");
181
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516 }
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517 #endif // CYGVAR_KERNEL_COUNTERS_CLOCK &c
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518
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519
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520 // ------------------------------------------------------------------------
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521 // Documentation: enclosed is the design of this test.
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522 //
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523 // See mutex3.cxx or kmutex3.c
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524
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525 // ------------------------------------------------------------------------
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526 // EOF mutex4.c