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1 #ifndef CYGONCE_KERNEL_MBOXT_INL |
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2 #define CYGONCE_KERNEL_MBOXT_INL |
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3 //========================================================================== |
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4 // |
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5 // mboxt.inl |
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6 // |
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7 // Mboxt mbox template class implementation |
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8 // |
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9 //========================================================================== |
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10 //####COPYRIGHTBEGIN#### |
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11 // |
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12 // ------------------------------------------- |
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13 // The contents of this file are subject to the Cygnus eCos Public License |
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14 // Version 1.0 (the "License"); you may not use this file except in |
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15 // compliance with the License. You may obtain a copy of the License at |
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16 // http://sourceware.cygnus.com/ecos |
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17 // |
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18 // Software distributed under the License is distributed on an "AS IS" |
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19 // basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the |
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20 // License for the specific language governing rights and limitations under |
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21 // the License. |
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22 // |
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23 // The Original Code is eCos - Embedded Cygnus Operating System, released |
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24 // September 30, 1998. |
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25 // |
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26 // The Initial Developer of the Original Code is Cygnus. Portions created |
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27 // by Cygnus are Copyright (C) 1998 Cygnus Solutions. All Rights Reserved. |
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28 // ------------------------------------------- |
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29 // |
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30 //####COPYRIGHTEND#### |
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31 //========================================================================== |
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32 //#####DESCRIPTIONBEGIN#### |
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33 // |
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34 // Author(s): hmt |
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35 // Contributors: hmt |
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36 // Date: 1998-02-10 |
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37 // Purpose: Mboxt template implementation |
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38 // Description: This file contains the implementations of the mboxt |
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39 // template classes. |
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40 // |
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41 //####DESCRIPTIONEND#### |
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42 // |
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43 //========================================================================== |
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44 |
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45 #include <pkgconf/kernel.h> |
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46 |
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47 #include <cyg/kernel/ktypes.h> // base kernel types |
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48 #include <cyg/infra/cyg_trac.h> // tracing macros |
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49 #include <cyg/infra/cyg_ass.h> // assertion macros |
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50 #include <cyg/kernel/instrmnt.h> // instrumentation |
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51 |
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52 #include <cyg/kernel/mboxt.hxx> // our header |
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53 |
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54 #include <cyg/kernel/thread.inl> // thread inlines |
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55 #include <cyg/kernel/sched.inl> // scheduler inlines |
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56 #include <cyg/kernel/clock.inl> // clock inlines |
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57 |
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58 // ------------------------------------------------------------------------- |
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59 // inline function for awakening waiting threads |
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60 |
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61 template <class T, cyg_count32 QUEUE_SIZE> |
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62 inline void |
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63 Cyg_Mboxt<T,QUEUE_SIZE>::wakeup_waiter( Cyg_ThreadQueue &q ) |
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64 { |
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65 if( !q.empty() ) { |
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66 // The queue is non-empty, so grab the next thread and wake it up. |
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67 Cyg_Thread *thread = q.dequeue(); |
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68 |
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69 CYG_ASSERTCLASS( thread, "Bad thread pointer"); |
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70 |
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71 thread->set_wake_reason( Cyg_Thread::DONE ); |
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72 thread->wake(); |
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73 CYG_INSTRUMENT_MBOXT(WAKE, this, thread); |
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74 } |
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75 } |
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76 |
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77 // ------------------------------------------------------------------------- |
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78 // Constructor |
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79 |
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80 template <class T, cyg_count32 QUEUE_SIZE> |
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81 Cyg_Mboxt<T,QUEUE_SIZE>::Cyg_Mboxt() |
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82 { |
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83 CYG_REPORT_FUNCTION(); |
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84 base = 0; |
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85 count = 0; |
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86 } |
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87 |
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88 // ------------------------------------------------------------------------- |
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89 // Destructor |
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90 |
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91 template <class T, cyg_count32 QUEUE_SIZE> |
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92 Cyg_Mboxt<T,QUEUE_SIZE>::~Cyg_Mboxt() |
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93 { |
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94 CYG_REPORT_FUNCTION(); |
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95 CYG_ASSERT( 0 == count, "Deleting mboxt with messages"); |
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96 CYG_ASSERT( get_threadq.empty(), "Deleting mboxt with threads waiting to get"); |
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97 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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98 CYG_ASSERT( put_threadq.empty(), "Deleting mboxt with threads waiting to put"); |
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99 #endif |
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100 } |
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101 |
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102 // ------------------------------------------------------------------------- |
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103 // debugging/assert function |
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104 |
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105 #ifdef CYGDBG_USE_ASSERTS |
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106 |
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107 template <class T, cyg_count32 QUEUE_SIZE> |
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108 cyg_bool |
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109 Cyg_Mboxt<T,QUEUE_SIZE>::check_this(cyg_assert_class_zeal zeal) |
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110 { |
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111 CYG_REPORT_FUNCTION(); |
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112 |
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113 if ( Cyg_Thread::DESTRUCT == Cyg_Thread::self()->get_wake_reason() ) |
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114 // then the whole thing is invalid, and we know it. |
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115 // so return OK, since this check should NOT make an error. |
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116 return true; |
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117 |
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118 // check that we have a non-NULL pointer first |
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119 if( this == NULL ) return false; |
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120 |
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121 #if 0 // thread queues do not have checking funcs. |
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122 if ( ! get_threadq.check_this( zeal ) ) return false; |
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123 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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124 if ( ! put_threadq.check_this( zeal ) ) return false; |
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125 #endif |
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126 #endif |
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127 |
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128 switch( zeal ) |
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129 { |
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130 case cyg_system_test: |
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131 case cyg_extreme: |
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132 case cyg_thorough: |
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133 case cyg_quick: |
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134 case cyg_trivial: |
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135 // plenty of scope for fencepost problems here |
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136 if ( size < count ) return false; |
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137 if ( size <= base ) return false; |
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138 if ( 0 > count ) return false; |
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139 if ( 0 > base ) return false; |
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140 |
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141 // there was initially a test of the form |
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142 // (0 < count && count < size) && ! threadqueue.empty() |
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143 // here - ie. there should only be people waiting if the Q is full |
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144 // or empty. This is bogus, anyone else might run between a waiter |
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145 // being awoken, so there can be a 2nd waiter in the Q and a free |
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146 // slot (say) simultaneously. |
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147 |
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148 // Further, we need 2 queues; imagine a 10-slot itemqueue with 25 |
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149 // attempts to put to it, so 15 sleep. 10 other threads get, |
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150 // awakening 10 of the 15 put-sleepers. Another one gets, and |
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151 // can't because there is no data there _yet_; it sleeps, and the |
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152 // 10 awakened threads cycle through the run queue, each putting, |
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153 // the first awakens the get-sleeper, which in turn awakens a |
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154 // further put-sleeper. |
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155 |
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156 // This requirement for 2 queue only holds if Ngetters > 2 * Nslots |
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157 // or Nputters > 2 * Nslots; if these are both false, one queue |
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158 // will suffice. This could be an optimisation for the future - |
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159 // wow, 4 bytes. |
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160 |
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161 case cyg_none: |
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162 default: |
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163 break; |
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164 }; |
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165 |
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166 return true; |
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167 } |
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168 |
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169 #endif |
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170 |
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171 |
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172 // ------------------------------------------------------------------------- |
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173 // From here downwards, these are the major functions of the template; if |
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174 // being genuinely used as a template they should probably not be inlined. |
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175 // If being used to construct a specific class, with explicit functions, |
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176 // then they should be. This is controlled by: |
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177 |
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178 #ifdef CYGIMP_MBOXT_INLINE |
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179 #define CYG_MBOXT_INLINE inline |
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180 #else |
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181 #define CYG_MBOXT_INLINE |
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182 #endif |
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183 |
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184 // ------------------------------------------------------------------------- |
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185 // Get an item, or wait for one to arrive |
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186 |
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187 template <class T, cyg_count32 QUEUE_SIZE> |
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188 CYG_MBOXT_INLINE cyg_bool |
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189 Cyg_Mboxt<T,QUEUE_SIZE>::get( T &ritem ) |
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190 { |
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191 CYG_REPORT_FUNCTION(); |
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192 cyg_bool result = true; |
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193 |
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194 Cyg_Thread *self = Cyg_Thread::self(); |
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195 |
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196 // Prevent preemption |
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197 Cyg_Scheduler::lock(); |
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198 |
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199 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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200 |
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201 CYG_INSTRUMENT_MBOXT(GET, this, count); |
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202 |
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203 // Loop while the mboxt is empty, sleeping each time around |
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204 // the loop. This copes with the possibility of a higher priority |
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205 // thread grabbing the message between the wakeup in unlock() and |
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206 // this thread actually starting. |
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207 |
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208 while( result && (0 == count) ) { |
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209 self->set_sleep_reason( Cyg_Thread::WAIT ); |
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210 self->sleep(); |
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211 get_threadq.enqueue( self ); |
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212 |
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213 CYG_INSTRUMENT_MBOXT(WAIT, this, count); |
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214 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(), |
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215 "Called with non-zero scheduler lock"); |
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216 |
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217 // Unlock scheduler and allow other threads to run |
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218 Cyg_Scheduler::unlock(); |
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219 Cyg_Scheduler::lock(); |
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220 |
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221 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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222 |
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223 switch( self->get_wake_reason() ) |
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224 { |
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225 case Cyg_Thread::DESTRUCT: |
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226 case Cyg_Thread::BREAK: |
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227 result = false; |
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228 break; |
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229 |
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230 case Cyg_Thread::EXIT: |
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231 self->exit(); |
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232 break; |
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233 |
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234 default: |
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235 break; |
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236 } |
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237 } |
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238 |
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239 if ( result ) { |
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240 CYG_INSTRUMENT_MBOXT(GOT, this, count); |
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241 |
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242 ritem = itemqueue[ (count--, base++) ]; |
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243 CYG_ASSERT( 0 <= count, "Count went -ve" ); |
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244 CYG_ASSERT( size >= base, "Base overflow" ); |
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245 |
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246 if ( size <= base ) |
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247 base = 0; |
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248 |
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249 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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250 wakeup_waiter( put_threadq ); |
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251 #endif |
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252 } |
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253 |
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254 // Unlock the scheduler and maybe switch threads |
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255 Cyg_Scheduler::unlock(); |
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256 |
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257 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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258 CYG_REPORT_RETVAL( result ); |
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259 return result; |
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260 } |
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261 |
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262 |
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263 // ------------------------------------------------------------------------- |
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264 // Try to get an item with an absolute timeout and return success. |
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265 |
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266 #ifdef CYGFUN_KERNEL_THREADS_TIMER |
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267 template <class T, cyg_count32 QUEUE_SIZE> |
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268 CYG_MBOXT_INLINE cyg_bool |
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269 Cyg_Mboxt<T,QUEUE_SIZE>::get( T &ritem, cyg_tick_count abs_timeout ) |
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270 { |
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271 CYG_REPORT_FUNCTION(); |
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272 cyg_bool result = true; |
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273 |
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274 Cyg_Thread *self = Cyg_Thread::self(); |
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275 |
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276 // Prevent preemption |
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277 Cyg_Scheduler::lock(); |
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278 |
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279 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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280 |
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281 CYG_INSTRUMENT_MBOXT(GET, this, count); |
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282 |
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283 // Set the timer _once_ outside the loop. |
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284 self->set_timer( abs_timeout, Cyg_Thread::TIMEOUT ); |
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285 |
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286 // If the timeout is in the past, the wake reason will have been |
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287 // set to something other than NONE already. Set the result false |
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288 // to force an immediate return. |
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289 |
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290 if( self->get_wake_reason() != Cyg_Thread::NONE ) |
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291 result = false; |
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292 |
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293 // Loop while the mboxt is empty, sleeping each time around the loop. |
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294 // This copes with the possibility of a higher priority thread grabbing |
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295 // the message between the wakeup in put()&c and this thread actually |
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296 // starting. |
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297 while ( result && (0 == count) ) { |
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298 // must reset the sleep reason every time |
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299 self->set_sleep_reason( Cyg_Thread::TIMEOUT ); |
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300 self->sleep(); |
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301 get_threadq.enqueue( self ); |
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302 |
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303 CYG_INSTRUMENT_MBOXT(WAIT, this, count); |
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304 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(), |
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305 "Called with non-zero scheduler lock"); |
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306 |
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307 // Unlock scheduler and allow other threads to run |
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308 Cyg_Scheduler::unlock(); |
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309 Cyg_Scheduler::lock(); |
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310 |
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311 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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312 |
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313 switch( self->get_wake_reason() ) |
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314 { |
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315 case Cyg_Thread::TIMEOUT: |
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316 result = false; |
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317 CYG_INSTRUMENT_MBOXT(TIMEOUT, this, count); |
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318 break; |
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319 |
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320 case Cyg_Thread::DESTRUCT: |
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321 case Cyg_Thread::BREAK: |
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322 result = false; |
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323 break; |
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324 |
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325 case Cyg_Thread::EXIT: |
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326 self->exit(); |
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327 break; |
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328 |
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329 default: |
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330 break; |
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331 } |
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332 } |
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333 |
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334 // clear the timer; if it actually fired, no worries. |
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335 self->clear_timer(); |
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336 |
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337 if ( result ) { |
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338 |
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339 CYG_INSTRUMENT_MBOXT(GOT, this, count); |
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340 |
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341 ritem = itemqueue[ (count--, base++) ]; |
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342 CYG_ASSERT( 0 <= count, "Count went -ve" ); |
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343 CYG_ASSERT( size >= base, "Base overflow" ); |
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344 |
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345 if ( size <= base ) |
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346 base = 0; |
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347 |
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348 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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349 wakeup_waiter( put_threadq ); |
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350 #endif |
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351 } |
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352 |
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353 // Unlock the scheduler and maybe switch threads |
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354 Cyg_Scheduler::unlock(); |
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355 |
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356 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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357 CYG_REPORT_RETVAL( result ); |
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358 return result; |
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359 } |
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360 #endif // CYGFUN_KERNEL_THREADS_TIMER |
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361 |
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362 // ------------------------------------------------------------------------- |
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363 // Try to get an item and return success. |
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364 |
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365 template <class T, cyg_count32 QUEUE_SIZE> |
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366 CYG_MBOXT_INLINE cyg_bool |
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367 Cyg_Mboxt<T,QUEUE_SIZE>::tryget( T &ritem ) |
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368 { |
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369 CYG_REPORT_FUNCTION(); |
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370 |
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371 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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372 |
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373 // Prevent preemption |
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374 Cyg_Scheduler::lock(); |
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375 |
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376 CYG_INSTRUMENT_MBOXT(TRY, this, count); |
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377 |
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378 cyg_bool result = ( 0 < count ); |
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379 // If the mboxt is not empty, grab an item and return it. |
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380 if ( result ) { |
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381 ritem = itemqueue[ (count--, base++) ]; |
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382 CYG_ASSERT( 0 <= count, "Count went -ve" ); |
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383 CYG_ASSERT( size >= base, "Base overflow" ); |
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384 if ( size <= base ) |
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385 base = 0; |
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386 |
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387 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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388 wakeup_waiter( put_threadq ); |
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389 #endif |
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390 } |
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391 |
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392 // Unlock the scheduler and maybe switch threads |
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393 Cyg_Scheduler::unlock(); |
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394 |
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395 return result; |
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396 } |
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397 |
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398 // ------------------------------------------------------------------------- |
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399 // get next item without removing it |
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400 template <class T, cyg_count32 QUEUE_SIZE> |
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401 CYG_MBOXT_INLINE cyg_bool |
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402 Cyg_Mboxt<T,QUEUE_SIZE>::peek_item( T &ritem ) |
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403 { |
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404 CYG_REPORT_FUNCTION(); |
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405 |
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406 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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407 |
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408 // Prevent preemption |
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409 Cyg_Scheduler::lock(); |
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410 |
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411 CYG_INSTRUMENT_MBOXT(TRY, this, count); |
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412 |
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413 cyg_bool result = ( 0 < count ); |
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414 // If the mboxt is not empty, grab an item and return it. |
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415 if ( result ) |
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416 ritem = itemqueue[ base ]; |
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417 |
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418 // Unlock the scheduler and maybe switch threads |
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419 Cyg_Scheduler::unlock(); |
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420 |
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421 return result; |
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422 } |
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423 |
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424 // ------------------------------------------------------------------------- |
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425 // Put an item in the queue; wait if full. |
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426 |
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427 #ifdef CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
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428 template <class T, cyg_count32 QUEUE_SIZE> |
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429 CYG_MBOXT_INLINE cyg_bool |
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430 Cyg_Mboxt<T,QUEUE_SIZE>::put( const T item ) |
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431 { |
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432 CYG_REPORT_FUNCTION(); |
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433 cyg_bool result = true; |
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434 |
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435 Cyg_Thread *self = Cyg_Thread::self(); |
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436 |
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437 // Prevent preemption |
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438 Cyg_Scheduler::lock(); |
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439 |
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440 CYG_INSTRUMENT_MBOXT(PUT, this, count); |
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441 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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442 |
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443 while ( result && (size == count) ) { |
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444 self->set_sleep_reason( Cyg_Thread::WAIT ); |
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445 self->sleep(); |
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446 put_threadq.enqueue( self ); |
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447 |
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448 CYG_INSTRUMENT_MBOXT(WAIT, this, count); |
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449 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(), |
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450 "Called with non-zero scheduler lock"); |
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451 |
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452 Cyg_Scheduler::unlock(); // unlock, maybe switch threads |
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453 Cyg_Scheduler::lock(); |
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454 |
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455 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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456 |
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457 switch( self->get_wake_reason() ) |
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458 { |
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459 case Cyg_Thread::DESTRUCT: |
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460 case Cyg_Thread::BREAK: |
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461 result = false; |
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462 break; |
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463 |
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464 case Cyg_Thread::EXIT: |
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465 self->exit(); |
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466 break; |
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467 |
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468 default: |
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469 break; |
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470 } |
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471 } |
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472 |
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473 if ( result ) { |
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474 cyg_count32 in = base + (count++); |
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475 if ( size <= in ) |
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476 in -= size; |
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477 |
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478 CYG_ASSERT( size > in, "in overflow" ); |
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479 CYG_ASSERT( 0 <= in, "in overflow" ); |
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480 CYG_ASSERT( size >= count, "count overflow" ); |
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481 |
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482 itemqueue[ in ] = item; |
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483 |
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484 wakeup_waiter( get_threadq ); |
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485 } |
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486 CYG_ASSERTCLASS( this, "Bad this pointer"); |
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487 |
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488 // Unlock the scheduler and maybe switch threads |
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489 Cyg_Scheduler::unlock(); |
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490 CYG_REPORT_RETVAL( result ); |
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491 return result; |
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492 } |
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493 |
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494 // ------------------------------------------------------------------------- |
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495 // Put an item in the queue; wait if full, with an absolute timeout; |
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496 // return success. |
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497 |
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498 #ifdef CYGFUN_KERNEL_THREADS_TIMER |
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499 template <class T, cyg_count32 QUEUE_SIZE> |
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500 CYG_MBOXT_INLINE cyg_bool |
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501 Cyg_Mboxt<T,QUEUE_SIZE>::put( const T item, cyg_tick_count abs_timeout ) |
|
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502 { |
|
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503 CYG_REPORT_FUNCTION(); |
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504 cyg_bool result = true; |
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505 |
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506 Cyg_Thread *self = Cyg_Thread::self(); |
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507 |
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508 // Prevent preemption |
|
|
509 Cyg_Scheduler::lock(); |
|
|
510 |
|
|
511 CYG_INSTRUMENT_MBOXT(PUT, this, count); |
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512 CYG_ASSERTCLASS( this, "Bad this pointer"); |
|
|
513 |
|
|
514 // Set the timer _once_ outside the loop. |
|
|
515 self->set_timer( abs_timeout, Cyg_Thread::TIMEOUT ); |
|
|
516 |
|
|
517 // If the timeout is in the past, the wake reason will have been |
|
|
518 // set to something other than NONE already. Set the result false |
|
|
519 // to force an immediate return. |
|
|
520 |
|
|
521 if( self->get_wake_reason() != Cyg_Thread::NONE ) |
|
|
522 result = false; |
|
|
523 |
|
|
524 // Loop while the mboxt is full, sleeping each time around the loop. |
|
|
525 // This copes with the possibility of a higher priority thread filling |
|
|
526 // the empty slot between the wakeup in get()&c and this thread |
|
|
527 // actually starting. |
|
|
528 while ( result && (size == count) ) { |
|
|
529 // must reset the sleep reason every time |
|
|
530 self->set_sleep_reason( Cyg_Thread::TIMEOUT ); |
|
|
531 self->sleep(); |
|
|
532 put_threadq.enqueue( self ); |
|
|
533 |
|
|
534 CYG_INSTRUMENT_MBOXT(WAIT, this, count); |
|
|
535 CYG_ASSERT( 1 == Cyg_Scheduler::get_sched_lock(), |
|
|
536 "Called with non-zero scheduler lock"); |
|
|
537 |
|
|
538 // Unlock scheduler and allow other threads to run |
|
|
539 Cyg_Scheduler::unlock(); |
|
|
540 Cyg_Scheduler::lock(); |
|
|
541 |
|
|
542 CYG_ASSERTCLASS( this, "Bad this pointer"); |
|
|
543 |
|
|
544 switch( self->get_wake_reason() ) |
|
|
545 { |
|
|
546 case Cyg_Thread::TIMEOUT: |
|
|
547 result = false; |
|
|
548 CYG_INSTRUMENT_MBOXT(TIMEOUT, this, count); |
|
|
549 break; |
|
|
550 |
|
|
551 case Cyg_Thread::DESTRUCT: |
|
|
552 case Cyg_Thread::BREAK: |
|
|
553 result = false; |
|
|
554 break; |
|
|
555 |
|
|
556 case Cyg_Thread::EXIT: |
|
|
557 self->exit(); |
|
|
558 break; |
|
|
559 |
|
|
560 default: |
|
|
561 break; |
|
|
562 } |
|
|
563 } |
|
|
564 |
|
|
565 // clear the timer; if it actually fired, no worries. |
|
|
566 self->clear_timer(); |
|
|
567 |
|
|
568 if ( result ) { |
|
|
569 cyg_count32 in = base + (count++); |
|
|
570 if ( size <= in ) |
|
|
571 in -= size; |
|
|
572 |
|
|
573 CYG_ASSERT( size > in, "in overflow" ); |
|
|
574 CYG_ASSERT( 0 <= in, "in overflow" ); |
|
|
575 CYG_ASSERT( size >= count, "count overflow" ); |
|
|
576 |
|
|
577 itemqueue[ in ] = item; |
|
|
578 |
|
|
579 wakeup_waiter( get_threadq ); |
|
|
580 } |
|
|
581 CYG_ASSERTCLASS( this, "Bad this pointer"); |
|
|
582 |
|
|
583 // Unlock the scheduler and maybe switch threads |
|
|
584 Cyg_Scheduler::unlock(); |
|
|
585 CYG_REPORT_RETVAL( result ); |
|
|
586 return result; |
|
|
587 } |
|
|
588 #endif // CYGFUN_KERNEL_THREADS_TIMER |
|
|
589 #endif // CYGMFN_KERNEL_SYNCH_MBOXT_PUT_CAN_WAIT |
|
|
590 |
|
|
591 // ------------------------------------------------------------------------- |
|
|
592 // Try to put an item in the queue and return success; queue may be full. |
|
|
593 |
|
|
594 template <class T, cyg_count32 QUEUE_SIZE> |
|
|
595 CYG_MBOXT_INLINE cyg_bool |
|
|
596 Cyg_Mboxt<T,QUEUE_SIZE>::tryput( const T item ) |
|
|
597 { |
|
|
598 CYG_REPORT_FUNCTION(); |
|
|
599 |
|
|
600 // Prevent preemption |
|
|
601 Cyg_Scheduler::lock(); |
|
|
602 |
|
|
603 CYG_INSTRUMENT_MBOXT(PUT, this, count); |
|
|
604 CYG_ASSERTCLASS( this, "Bad this pointer"); |
|
|
605 |
|
|
606 if ( size == count ) { |
|
|
607 Cyg_Scheduler::unlock(); // unlock, maybe switch threads |
|
|
608 return false; // the mboxt is full |
|
|
609 } |
|
|
610 |
|
|
611 cyg_count32 in = base + (count++); |
|
|
612 if ( size <= in ) |
|
|
613 in -= size; |
|
|
614 |
|
|
615 CYG_ASSERT( size > in, "in overflow" ); |
|
|
616 CYG_ASSERT( 0 <= in, "in overflow" ); |
|
|
617 CYG_ASSERT( size >= count, "count overflow" ); |
|
|
618 |
|
|
619 itemqueue[ in ] = item; |
|
|
620 |
|
|
621 CYG_ASSERTCLASS( this, "Bad this pointer"); |
|
|
622 |
|
|
623 wakeup_waiter( get_threadq ); |
|
|
624 |
|
|
625 // Unlock the scheduler and maybe switch threads |
|
|
626 Cyg_Scheduler::unlock(); |
|
|
627 |
|
|
628 return true; |
|
|
629 } |
|
|
630 |
|
|
631 |
|
|
632 // ------------------------------------------------------------------------- |
|
|
633 #endif // ifndef CYGONCE_KERNEL_MBOXT_INL |
|
|
634 // EOF mboxt.inl |
