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1 //========================================================================== |
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2 // |
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3 // sync2.cxx |
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4 // |
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5 // Sync test 2 -- test of different locking mechanisms |
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6 // |
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7 //========================================================================== |
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8 //####COPYRIGHTBEGIN#### |
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9 // |
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10 // ------------------------------------------- |
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11 // The contents of this file are subject to the Cygnus eCos Public License |
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12 // Version 1.0 (the "License"); you may not use this file except in |
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13 // compliance with the License. You may obtain a copy of the License at |
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14 // http://sourceware.cygnus.com/ecos |
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15 // |
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16 // Software distributed under the License is distributed on an "AS IS" |
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17 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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18 // License for the specific language governing rights and limitations under |
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19 // the License. |
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20 // |
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21 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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22 // September 30, 1998. |
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23 // |
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24 // The Initial Developer of the Original Code is Cygnus. Portions created |
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25 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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26 // ------------------------------------------- |
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27 // |
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28 //####COPYRIGHTEND#### |
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29 //========================================================================== |
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30 //#####DESCRIPTIONBEGIN#### |
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31 // |
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32 // Author(s): dsm |
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33 // Contributors: dsm |
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34 // Date: 1998-02-18 |
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35 // Description: |
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36 // Creates some threads and tests the various synchronization |
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37 // mechanisms. Four threads are created t0..t3. t0 and t3 grab a |
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38 // mutex and check they have exclusive access to shared variable. |
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39 // t0,t1,t2 post each other in a loop with a semaphore so that |
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40 // only one is running at any time. t1,t2,t3 do a similar thing |
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41 // with counting semaphores, except that there are two active |
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42 // threads. |
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43 // Omissions: |
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44 // Doesn't test condition variables |
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45 // |
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46 //####DESCRIPTIONEND#### |
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47 |
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48 #include <pkgconf/kernel.h> |
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49 |
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50 #include <cyg/kernel/thread.hxx> |
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51 #include <cyg/kernel/thread.inl> |
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52 #include <cyg/kernel/sched.hxx> |
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53 #include <cyg/kernel/mutex.hxx> |
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54 #include <cyg/kernel/sema.hxx> |
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55 |
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56 #include <cyg/infra/testcase.h> |
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57 |
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58 #include <cyg/kernel/sched.inl> |
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59 |
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60 #define NTHREADS 4 |
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61 |
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62 #include "testaux.hxx" |
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63 |
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64 static Cyg_Mutex m0; |
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65 static Cyg_Binary_Semaphore s0, s1, s2(1); |
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66 static Cyg_Counting_Semaphore cs0, cs1, cs2, cs3; |
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67 |
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68 static const cyg_ucount16 n = 1000; |
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69 static cyg_ucount8 m0d=99, sd=2, cd0=99, cd1=99; |
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70 |
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71 static void entry0( CYG_ADDRWORD data ) |
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72 { |
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73 for(cyg_ucount16 i=0; i<n; i++) { |
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74 s2.wait(); |
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75 CHECK( 2 == sd ); |
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76 sd = 0; |
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77 m0.lock(); { |
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78 m0d = 0; |
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79 s0.post(); |
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80 CHECK( 0 == m0d ); |
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81 } m0.unlock(); |
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82 } |
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83 // wait for 3 explicit posts to indicate threads have stopped. |
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84 for(cyg_ucount8 i=0; i<3; i++) |
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85 cs3.wait(); |
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86 |
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87 CHECK( ! s0.posted() ); |
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88 CHECK( ! s1.posted() ); |
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89 CHECK( s2.posted() ); |
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90 |
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91 CHECK( 0 == cs0.peek() ); |
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92 CHECK( 0 == cs1.peek() ); |
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93 CHECK( 0 == cs2.peek() ); |
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94 CHECK( 0 == cs3.peek() ); |
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95 |
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96 CHECK( 0 == cd0 ); |
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97 CHECK( 0 == cd1 ); |
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98 CYG_TEST_PASS_FINISH("Sync 2 OK"); |
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99 CYG_TEST_FAIL_FINISH("Not reached"); |
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100 } |
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101 |
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102 static void entry1( CYG_ADDRWORD data ) |
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103 { |
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104 for(cyg_ucount16 i=0; i<n; i++) { |
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105 s0.wait(); |
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106 CHECK( 0 == sd ); |
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107 sd = 1; |
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108 cd0 = 1; |
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109 cs1.post(); |
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110 cd1 = 1; |
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111 cs1.post(); |
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112 s1.post(); |
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113 cs0.wait(); |
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114 CHECK( 0 == cd0 ); |
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115 cs0.wait(); |
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116 CHECK( 0 == cd1 ); |
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117 } |
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118 cs3.post(); |
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119 s0.wait(); |
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120 CYG_TEST_FAIL_FINISH("Not reached"); |
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121 } |
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122 |
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123 static void entry2( CYG_ADDRWORD data ) |
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124 { |
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125 for(cyg_ucount16 i=0; i<n; i++) { |
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126 s1.wait(); |
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127 CHECK( 1 == sd ); |
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128 sd = 2; |
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129 cs1.wait(); |
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130 CHECK( 1 == cd0 ); |
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131 cd0 = 2; |
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132 cs2.post(); |
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133 s2.post(); |
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134 cs1.wait(); |
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135 CHECK( 1 == cd1 ); |
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136 cd1 = 2; |
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137 cs2.post(); |
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138 } |
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139 cs3.post(); |
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140 s1.wait(); |
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141 CYG_TEST_FAIL_FINISH("Not reached"); |
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142 } |
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143 |
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144 static void entry3( CYG_ADDRWORD data ) |
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145 { |
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146 for(cyg_ucount16 i=0; i < n*2; i++) { |
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147 cs2.wait(); |
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148 CHECK( 2 == cd0 || 2 == cd1 ); |
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149 m0.lock(); { |
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150 m0d = 3; |
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151 if( 2 == cd0 ) |
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152 cd0 = 0; |
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153 else { |
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154 CHECK( 2 == cd1 ); |
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155 cd1 = 0; |
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156 } |
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157 cs0.post(); |
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158 CHECK( 3 == m0d ); |
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159 } m0.unlock(); |
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160 } |
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161 cs3.post(); |
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162 cs1.wait(); |
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163 CYG_TEST_FAIL_FINISH("Not reached"); |
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164 } |
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165 |
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166 |
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167 void sync2_main(void) |
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168 { |
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169 CYG_TEST_INIT(); |
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170 |
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171 new_thread(entry0, 0); |
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172 new_thread(entry1, 1); |
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173 new_thread(entry2, 2); |
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174 new_thread(entry3, 3); |
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175 |
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176 Cyg_Scheduler::start(); |
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177 |
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178 CYG_TEST_PASS_FINISH("Not reached"); |
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179 } |
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180 |
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181 externC void |
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182 cyg_start( void ) |
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183 { |
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184 sync2_main(); |
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185 } |
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186 |
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187 // EOF sync2.cxx |
