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* tests/ksem1.c: Type fix to fix a compiler warning. * tests/mutex3.cxx: new cannot be both static and global. * tests/testaux.hxx: Ditto
author asl
date Wed, 03 Aug 2005 20:57:41 +0000
parents 92cf4ff674de
children 74dbf4c3f2e1
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1 //==========================================================================
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2 //
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3 // mutex3.cxx
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4 //
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5 // Mutex test 3 - priority inheritance
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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/
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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
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46 // Description: Tests mutex priority inheritance
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47 //####DESCRIPTIONEND####
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48
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49 #include <pkgconf/hal.h>
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50 #include <pkgconf/kernel.h>
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51
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52 #include <cyg/kernel/sched.hxx> // Cyg_Scheduler::start()
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53 #include <cyg/kernel/thread.hxx> // Cyg_Thread
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54
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55 #include <cyg/kernel/mutex.hxx>
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56
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57 #include <cyg/infra/testcase.h>
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58
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59 #include <cyg/kernel/sched.inl>
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60 #include <cyg/kernel/thread.inl>
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61
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62 #include <cyg/infra/diag.h> // diag_printf
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64 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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65 externC void
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66 cyg_hal_invoke_constructors();
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67 #endif
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69 // ------------------------------------------------------------------------
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70 //
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71 // These checks should be enough; any other scheduler which has priorities
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72 // should manifest as having no priority inheritance, but otherwise fine,
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73 // so the test should work correctly.
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74
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75 #if defined(CYGVAR_KERNEL_COUNTERS_CLOCK) && \
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76 (CYGNUM_KERNEL_SCHED_PRIORITIES > 20) && \
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77 !defined(CYGPKG_KERNEL_SMP_SUPPORT)
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78
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79 // ------------------------------------------------------------------------
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80 // Manufacture a simpler feature test macro for priority inheritance than
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81 // the configuration gives us. We have priority inheritance if it is configured
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82 // as the only protocol, or if it is the default protocol for dynamic protocol
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83 // choice.
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84 // FIXME: If we have dynamic protocol choice, we can also set priority inheritance
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85 // as the protocol to be used on the mutexes we are interested in. At present we
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86 // do not do this.
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87
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88 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_INHERIT
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89 # ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC
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90 # ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_INHERIT
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91 # define PRIORITY_INHERITANCE "dynamic-default-inherit"
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92 # endif
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93 # else
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94 # define PRIORITY_INHERITANCE "static-inherit"
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95 # endif
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96 #endif
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97
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98 #ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_CEILING
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99 # ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DYNAMIC
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100 # ifdef CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_CEILING
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101 # if CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_PRIORITY <= 5
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102 # define PRIORITY_INHERITANCE "dynamic-default-ceiling-high"
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103 # elif CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_PRIORITY >= 15
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104 # define NO_PRIORITY_INHERITANCE "dynamic-default-ceiling-low"
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105 # else
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106 # define PRIORITY_UNKNOWN "dynamic-default-ceiling-mid"
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107 # endif
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108 # endif
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109 # else
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110 # if CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_PRIORITY <= 5
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111 # define PRIORITY_INHERITANCE "static-ceiling-high"
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112 # elif CYGSEM_KERNEL_SYNCH_MUTEX_PRIORITY_INVERSION_PROTOCOL_DEFAULT_PRIORITY >= 15
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113 # define NO_PRIORITY_INHERITANCE "static-ceiling-low"
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114 # else
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115 # define PRIORITY_UNKNOWN "static-ceiling-mid"
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116 # endif
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117 # endif
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118 #endif
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119
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120 #ifndef PRIORITY_INHERITANCE
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121 # ifndef NO_PRIORITY_INHERITANCE
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122 # define NO_PRIORITY_INHERITANCE "no scheme selected"
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123 # endif
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124 #endif
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125
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126 // ------------------------------------------------------------------------
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127 // Management functions
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128 //
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129 // Stolen from testaux.hxx and copied in here because I want to be able to
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130 // reset the world also.
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131
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132 #define NTHREADS 7
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133
2052
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134 inline void *operator new(size_t size, void *ptr) { return ptr; };
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135
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136 #define STACKSIZE CYGNUM_HAL_STACK_SIZE_TYPICAL
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137
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138 static Cyg_Thread *thread[NTHREADS] = { 0 };
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139
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140 typedef CYG_WORD64 CYG_ALIGNMENT_TYPE;
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141
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142 static CYG_ALIGNMENT_TYPE thread_obj[NTHREADS] [
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143 (sizeof(Cyg_Thread)+sizeof(CYG_ALIGNMENT_TYPE)-1)
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144 / sizeof(CYG_ALIGNMENT_TYPE) ];
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145
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146 static CYG_ALIGNMENT_TYPE stack[NTHREADS] [
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147 (STACKSIZE+sizeof(CYG_ALIGNMENT_TYPE)-1)
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148 / sizeof(CYG_ALIGNMENT_TYPE) ];
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149
191
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150 static volatile int nthreads = 0;
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151
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152 static Cyg_Thread *new_thread( cyg_thread_entry *entry,
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153 CYG_ADDRWORD data,
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154 CYG_ADDRWORD priority,
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155 int do_resume )
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156 {
191
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157 int _nthreads = nthreads++;
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158
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159 CYG_ASSERT(_nthreads < NTHREADS,
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160 "Attempt to create more than NTHREADS threads");
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161
191
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162 thread[_nthreads] = new( (void *)&thread_obj[_nthreads] )
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163 Cyg_Thread(priority,
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164 entry, data,
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165 NULL, // no name
191
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166 (CYG_ADDRESS)stack[_nthreads], STACKSIZE );
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167
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168 if ( do_resume )
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169 thread[_nthreads]->resume();
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170
191
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171 return thread[_nthreads];
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172 }
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173
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174
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175 static void kill_threads( void )
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176 {
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177 CYG_ASSERT(nthreads <= NTHREADS,
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178 "More than NTHREADS threads");
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179 CYG_ASSERT( Cyg_Thread::self() == thread[0],
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180 "kill_threads() not called from thread 0");
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181 while ( nthreads > 1 ) {
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182 nthreads--;
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183 if ( NULL != thread[nthreads] ) {
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184 thread[nthreads]->kill();
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185 thread[nthreads]->~Cyg_Thread();
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186 thread[nthreads] = NULL;
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187 }
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188 }
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189 CYG_ASSERT(nthreads == 1,
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190 "No threads left");
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191 }
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192
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193 // ------------------------------------------------------------------------
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194
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195 #define DELAYFACTOR 1 // for debugging
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196
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197 // ------------------------------------------------------------------------
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198
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199 static Cyg_Mutex mutex;
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200
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201 // These are for reporting back to the master thread
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202 volatile int got_it = 0;
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203 volatile int t3ran = 0;
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204 volatile int t3ended = 0;
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205 volatile int extras[4] = {0,0,0,0};
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206
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207 volatile int go_flag = 0; // but this one controls thread 3 from thread 2
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208
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209 // ------------------------------------------------------------------------
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210 // 0 to 3 of these run generally to interfere with the other processing,
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211 // to cause multiple prio inheritances, and clashes in any orders.
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212
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213 static void extra_thread( CYG_ADDRWORD data )
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214 {
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215 #define XINFO( z ) \
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216 do { z[13] = '0' + data; CYG_TEST_INFO( z ); } while ( 0 )
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217
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218 static char running[] = "Extra thread Xa running";
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219 static char exiting[] = "Extra thread Xa exiting";
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220 static char resumed[] = "Extra thread Xa resumed";
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221 static char locked[] = "Extra thread Xa locked";
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222 static char unlocked[] = "Extra thread Xa unlocked";
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223
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224 XINFO( running );
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225
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226 Cyg_Thread *self = Cyg_Thread::self();
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227
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228 self->suspend();
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229
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230 XINFO( resumed );
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231
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232 mutex.lock();
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233
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234 XINFO( locked );
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235
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236 mutex.unlock();
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237
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238 XINFO( unlocked );
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239
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240 extras[ data ] ++;
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241
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242 XINFO( exiting );
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243
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244 }
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245
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246 // ------------------------------------------------------------------------
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247
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248 static void t1( CYG_ADDRWORD data )
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249 {
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250 Cyg_Thread *self = Cyg_Thread::self();
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251
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252 CYG_TEST_INFO( "Thread 1 running" );
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253
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254 self->suspend();
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255
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256 mutex.lock();
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257
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258 got_it++;
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259
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260 CYG_TEST_CHECK( 0 == t3ended, "T3 ended prematurely [T1,1]" );
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261
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262 mutex.unlock();
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263
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264 CYG_TEST_CHECK( 0 == t3ended, "T3 ended prematurely [T1,2]" );
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265
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266 // That's all.
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267
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268 CYG_TEST_INFO( "Thread 1 exit" );
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269 }
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270
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271 // ------------------------------------------------------------------------
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272
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273 static void t2( CYG_ADDRWORD data )
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274 {
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275 Cyg_Thread *self = Cyg_Thread::self();
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276 int i;
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277 cyg_tick_count then, now;
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278
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279
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280 CYG_TEST_INFO( "Thread 2 running" );
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281
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282 CYG_TEST_CHECK( 0 == (data & ~0x77), "Bad T2 arg: extra bits" );
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283 CYG_TEST_CHECK( 0 == (data & (data >> 4)), "Bad T2 arg: overlap" );
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284
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285 self->suspend();
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286
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287 // depending on our config argument, optionally restart some of the
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288 // extra threads to throw noise into the scheduler:
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289 for ( i = 0; i < 3; i++ )
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290 if ( (1 << i) & data ) // bits 0-2 control
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291 thread[i+4]->resume(); // made sure extras are thread[4-6]
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292
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293 self->delay( DELAYFACTOR * 10 ); // let those threads run
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294
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295 Cyg_Scheduler::lock(); // do this next lot atomically
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296
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297 go_flag = 1; // unleash thread 3
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298 thread[1]->resume(); // resume thread 1
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299
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300 // depending on our config argument, optionally restart some of the
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301 // extra threads to throw noise into the scheduler at this later point:
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302 for ( i = 4; i < 7; i++ )
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303 if ( (1 << i) & data ) // bits 4-6 control
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304 thread[i]->resume(); // made sure extras are thread[4-6]
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305
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306 Cyg_Scheduler::unlock(); // let scheduling proceed
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307
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308 // Need a delay (but not a CPU yield) to allow t3 to awaken and act on
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309 // the go_flag, otherwise we check these details below too soon.
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310 // Actually, waiting for the clock to tick a couple of times would be
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311 // better, so that is what we will do. Must be a busy-wait.
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312 then = Cyg_Clock::real_time_clock->current_value();
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313 do {
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314 now = Cyg_Clock::real_time_clock->current_value();
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315 // Wait longer than the delay in t3 waiting on go_flag
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316 } while ( now < (then + 3) );
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317
178
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318 #ifdef PRIORITY_UNKNOWN
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319 CYG_TEST_INFO( "Not checking: " PRIORITY_UNKNOWN );
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320 #else
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321 #ifdef PRIORITY_INHERITANCE
178
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322 CYG_TEST_INFO( "Checking priority scheme: " PRIORITY_INHERITANCE );
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323 CYG_TEST_CHECK( 1 == t3ran, "Thread 3 did not run" );
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324 CYG_TEST_CHECK( 1 == got_it, "Thread 1 did not get the mutex" );
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325 #else
178
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326 CYG_TEST_INFO( "Checking NO priority scheme: " NO_PRIORITY_INHERITANCE );
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327 CYG_TEST_CHECK( 0 == t3ran, "Thread 3 DID run" );
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328 CYG_TEST_CHECK( 0 == got_it, "Thread 1 DID get the mutex" );
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329 #endif
178
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330 #endif
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331
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332 CYG_TEST_CHECK( 0 == t3ended, "Thread 3 ended prematurely [T2,1]" );
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333
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334 self->delay( DELAYFACTOR * 20 ); // let those threads run
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335
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336 CYG_TEST_CHECK( 1 == t3ran, "Thread 3 did not run" );
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337 CYG_TEST_CHECK( 1 == got_it, "Thread 1 did not get the mutex" );
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338 CYG_TEST_CHECK( 1 == t3ended, "Thread 3 has not ended" );
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339
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340 for ( i = 0; i < 3; i++ )
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341 if ( (1 << i) & (data | data >> 4) ) // bits 0-2 and 4-6 control
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342 CYG_TEST_CHECK( 1 == extras[i+1], "Extra thread did not run" );
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343 else
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344 CYG_TEST_CHECK( 0 == extras[i+1], "Extra thread ran" );
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345
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346 CYG_TEST_PASS( "Thread 2 exiting, AOK" );
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347 // That's all: restart the control thread.
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348 thread[0]->resume();
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349 }
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350
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351 // ------------------------------------------------------------------------
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352
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353 static void t3( CYG_ADDRWORD data )
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354 {
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355 Cyg_Thread *self = Cyg_Thread::self();
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356
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357 CYG_TEST_INFO( "Thread 3 running" );
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358
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359 mutex.lock();
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360
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361 self->delay( DELAYFACTOR * 5 ); // let thread 3a run
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362
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363 thread[2]->resume(); // resume thread 2
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364
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365 while ( 0 == go_flag )
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366 self->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 mutex.unlock();
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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
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378 CYG_TEST_INFO( "Thread 3 exit" );
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379 }
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380
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381 // ------------------------------------------------------------------------
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382
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383 static void control_thread( CYG_ADDRWORD data )
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384 {
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385 Cyg_Thread *self = Cyg_Thread::self();
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386 int i;
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387
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388 CYG_TEST_INIT();
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389 CYG_TEST_INFO( "Control Thread running" );
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390
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391 // Go through the 27 possibilitied of resuming the extra threads
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392 // 0: not at all
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393 // 1: early in the process
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394 // 2: later on
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395 // which are represented by bits 0-3 and 4-6 resp in the argument to
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396 // thread 2 (none set means no resume at all).
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397 for ( i = 0; i < 27; i++ ) {
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398 static int xx[] = { 0, 1, 16 };
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399 int j = i % 3;
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400 int k = (i / 3) % 3;
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401 int l = (i / 9) % 3;
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402
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403 int d = xx[j] | (xx[k]<<1) | (xx[l]<<2) ;
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404
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405 if ( cyg_test_is_simulator && (0 != i && 13 != i && 26 != i) )
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406 continue; // 13 is 111 base 3, 26 is 222 base 3
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407
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408 #ifdef PRIORITY_INHERITANCE
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409 // If the simple scheme plus relay enhancement, or any other
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410 // *complete* scheme, we can run all three ancillary threads no
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411 // problem, so no special action here.
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412
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413 #else
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414 // If no priority inheritance at all, running threads 1a and 2a is
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415 // OK, but not thread 3a; it blocks the world.
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416 if ( l ) // Cannot run thread 3a if no
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417 break; // priority inheritance at all.
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418 #endif
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419
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420 mutex = Cyg_Mutex(); // Reinitialize this
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421
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422 got_it = 0;
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423 t3ran = 0;
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424 t3ended = 0;
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425 for ( int z = 0; z < 4; z++ ) extras[z] = 0;
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426 go_flag = 0;
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427
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428 new_thread( t1, 0, 5, 1 ); // Slot 1
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429 new_thread( t2, d, 10, 1 ); // Slot 2
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430 new_thread( t3, 0, 15, 1 ); // Slot 3
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431
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432 new_thread( extra_thread, 1, 8, j ); // Slot 4
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433 new_thread( extra_thread, 2, 12, k ); // Slot 5
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434 new_thread( extra_thread, 3, 17, l ); // Slot 6
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435
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436 {
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437 static char *a[] = { "inactive", "run early", "run late" };
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438 diag_printf( "\n----- [%2d] New Cycle: 0x%02x, Threads 1a %s, 2a %s, 3a %s -----\n",
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439 i, d, a[j], a[k], a[l] );
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440 }
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441
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442 self->suspend();
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443
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444 kill_threads();
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445 mutex.~Cyg_Mutex();
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446 }
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447 CYG_TEST_EXIT( "Control Thread exit" );
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448 }
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449
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450 // ------------------------------------------------------------------------
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451
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452 externC void
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453 cyg_user_start( void )
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454 {
130
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455 #ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG
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456 cyg_hal_invoke_constructors();
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457 #endif
62
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458 new_thread( control_thread, 0, 2, 1 );
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459 }
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460
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461 #else // CYGVAR_KERNEL_COUNTERS_CLOCK &c
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462
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463 externC void
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464 cyg_start( void )
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465 {
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466 CYG_TEST_INIT();
1507
92cf4ff674de * tests/kmutex3.c (cyg_start): Use CYG_TEST_NA.
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467 CYG_TEST_INFO("Mutex3 test requires:\n"
62
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468 "CYGVAR_KERNEL_COUNTERS_CLOCK &&\n"
177
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469 "(CYGNUM_KERNEL_SCHED_PRIORITIES > 20) &&\n"
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470 "!defined(CYGPKG_KERNEL_SMP_SUPPORT)\n");
1507
92cf4ff674de * tests/kmutex3.c (cyg_start): Use CYG_TEST_NA.
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471 CYG_TEST_NA("Mutex3 test requirements");
62
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472 }
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473 #endif // CYGVAR_KERNEL_COUNTERS_CLOCK &c
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474
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475
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476 // ------------------------------------------------------------------------
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477 // Documentation: enclosed is the design of this test.
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478 //
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479 // It has been carefully constructed so that it does NOT use other kernel
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480 // facilities (aside from delay-task) to test that priority inheritance is
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481 // working, or not, as intended by the configuration.
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482 //
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483 // These notes describe the flow of control in one run of the test with the
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484 // ancillary tasks optionally interspersed. The details of how those extra
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485 // tasks are or are not allowed to run are not described.
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486 //
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487 //
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488 //
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489 // The only change in the test that depends on whether there is inheritance or
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490 // not is the check in thread 2 on "3-ran" and "got it" flags marked ****
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491 //
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492 //
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493 // volatile &c booleans:
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494 // "got it" = FALSE
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495 // "3-ran" = FALSE
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496 // "3-ended" = FALSE
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497 // "extras"[3] = FALSE
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498 //
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499 // thread 1. prio 5, self-suspend.
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500 //
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501 // thread 1a, prio 8, self-suspend.
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502 //
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503 // thread 2. prio 10, self-suspend.
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504 //
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505 // thread 2a, prio 12, self-suspend.
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506 //
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507 // thread 3. prio 15, runs, lock mutex, resume(2)
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508 //
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509 // thread 3a, prio 17, self-suspend.
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510 //
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511 // 2. runs,
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512 // 2. resume(3a) +++OPTIONAL
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513 // 2. resume(2a) +++OPTIONAL
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514 // 2. resume(1a) +++OPTIONAL
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515 // [1a lock-fail] thread 3->prio := 8
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516 //
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517 // [3. runs maybe, does the looping thing]
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518 //
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519 // 2. sleep a while...
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520 //
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521 // [2a lock-fail] thread 3->prio := 12
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522 //
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523 // [3. runs maybe, does the looping thing]
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524 //
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525 // [3a lock-fail] thread 3->prio unchanged
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526 //
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527 // [3. runs maybe, does the looping thing]
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528 //
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529 // 2. lock scheduler
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530 // 2. set "go-flag"
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531 // 2. resume(1)
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532 // 2. resume(1a) +++OPTIONAL
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533 // 2. resume(2a) +++OPTIONAL
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534 // 2. resume(3a) +++OPTIONAL
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535 // 2. unlock scheduler
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536 //
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537 // 1. runs, lock mutex - thread 3 has it locked
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538 //
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539 // 2. busy-waits a bit for thread 3 to come out of its delay() loop.
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540 // This must be a *busy*wait so that 3 can only run via the
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541 // inherited raised priority.
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542 //
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543 // [xa. all do the same: lock mutex, ]
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544 // [xa. unlock mutex ]
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545 // [xa. set a flag "extras"[x] to say we are done. ]
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546 // [xa. exit ]
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547 //
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548 //
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549 //
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550 // INHERIT
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551 // -------
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552 //
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553 // thread 3->prio := 5
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554 //
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555 // 3. runs,
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556 // 3. set a flag to say "3-ran",
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557 // 3. loop with a sleep(1) until "go-flag" is set.
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558 // 3. check "got it" is false,
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559 // 3. then unlock mutex,
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560 //
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561 // thread 3->prio := 15
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562 //
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563 // 1. runs, set a flag to say "got it",
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564 // 1. check "3-ended" flag is false
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565 // 1. unlock mutex,
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566 // 1. check "3-ended" flag is still false
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567 // 1. exit.
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568 //
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569 // [1a locks, unlocks, exits]
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570 //
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571 // 2. runs, check "3-ran" and "got it" flags are TRUE ****
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572 // 2. check "3-ended" flag is false
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573 // 2. sleeps for a while so that...
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574 //
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575 // [2a locks, unlocks, exits]
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576 //
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577 // 3. runs, set "3-ended" flag,
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578 // 3. check "3-ran" and "got it" flags
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579 // 3. exit
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580 //
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581 // [3a locks, unlocks, exits]
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582 //
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583 // 2. awakens, checks all flags true,
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584 // 2. check that all "extra" threads that we started have indeed run
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585 // 2. end of test.
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586 //
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587 //
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588 //
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589 //
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590 // NO-INHERIT
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591 // ----------
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592 // thread 1 is waiting on the mutex
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593 //
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594 // [1a lock-fail]
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595 //
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596 // 2. runs, checks that "3-ran" and "got it" flags are FALSE ****
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597 // 2. check "3-ended" flag is false
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598 // 2. sleeps for a while so that...
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599 //
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600 // [2a. lock-fail]
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601 //
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602 // 3. runs, set a flag to say "3-ran",
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603 // 3. check "got it" is false,
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604 // 3. then unlock mutex,
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605 //
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606 // 1. runs, set a flag to say "got it",
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607 // 1. check "3-ended" flag is false
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608 // 1. unlock mutex,
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609 // 1. check "3-ended" flag is still false
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610 // 1. exit.
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611 //
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612 // [1a locks, unlocks, exits]
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613 // [2a locks, unlocks, exits]
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614 //
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615 // 3. runs, set "3-ended" flag,
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616 // 3. check "3-ran" and "got it" flags
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617 // 3. exit
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618 //
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619 // [3a locks, unlocks, exits]
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620 //
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621 // 2. awakens, checks all flags true,
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622 // 2. check that all "extra" threads that we started have indeed run
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623 // 2. end of test.
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624 //
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625 //
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626 // (the end)
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627 //
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628 //
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629 // ------------------------------------------------------------------------
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630
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631 // EOF mutex3.cxx