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1 /*
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2 * Copyright 2010 OpenSourceCodeStewardshipFoundation
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3 *
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4 * Licensed under BSD
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include <malloc.h>
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10
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11 #include "VMS.h"
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12 #include "Queue_impl/BlockingQueue.h"
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13
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14
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15 #define thdAttrs NULL
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16
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17 //===========================================================================
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18 void
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19 shutdownFn( void *dummy, VirtProcr *dummy2 );
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20
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21 void
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22 create_sched_slots( MasterEnv *masterEnv );
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23
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24 void
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25 create_masterEnv();
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26
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27 void
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28 create_the_coreLoop_OS_threads();
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29
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30 pthread_mutex_t suspendLock = PTHREAD_MUTEX_INITIALIZER;
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31 pthread_cond_t suspend_cond = PTHREAD_COND_INITIALIZER;
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32
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33 //===========================================================================
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34
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35 /*Setup has two phases:
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36 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
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37 * the master virt procr into the work-queue, ready for first "call"
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38 * 2) Semantic layer then does its own init, which creates the seed virt
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39 * procr inside the semantic layer, ready to schedule it when
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40 * asked by the first run of the masterLoop.
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41 *
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42 *This part is bit weird because VMS really wants to be "always there", and
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43 * have applications attach and detach.. for now, this VMS is part of
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44 * the app, so the VMS system starts up as part of running the app.
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45 *
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46 *The semantic layer is isolated from the VMS internals by making the
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47 * semantic layer do setup to a state that it's ready with its
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48 * initial virt procrs, ready to schedule them to slots when the masterLoop
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49 * asks. Without this pattern, the semantic layer's setup would
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50 * have to modify slots directly to assign the initial virt-procrs, and put
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51 * them into the workQ itself, breaking the isolation completely.
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52 *
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53 *
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54 *The semantic layer creates the initial virt procr(s), and adds its
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55 * own environment to masterEnv, and fills in the pointers to
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56 * the requestHandler and slaveScheduler plug-in functions
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57 */
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58
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59 /*This allocates VMS data structures, populates the master VMSProc,
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60 * and master environment, and returns the master environment to the semantic
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61 * layer.
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62 */
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63 void
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64 VMS__init()
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65 {
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66 create_masterEnv();
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67 create_the_coreLoop_OS_threads();
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68 }
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69
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70 /*To initialize the sequential version, just don't create the threads
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71 */
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72 void
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73 VMS__init_Seq()
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74 {
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75 create_masterEnv();
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76 }
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77
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78 void
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79 create_masterEnv()
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80 { MasterEnv *masterEnv;
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81 VMSQueueStruc *workQ;
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82
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83 //Make the central work-queue
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84 _VMSWorkQ = makeVMSQ();
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85 workQ = _VMSWorkQ;
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86
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87 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
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88 masterEnv = _VMSMasterEnv;
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89
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90 //create the master virtual processor
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91 masterEnv->masterVirtPr = VMS__create_procr( &masterLoop, masterEnv );
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92
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93 create_sched_slots( masterEnv );
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94
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95 masterEnv->stillRunning = FALSE;
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96 masterEnv->numToPrecede = NUM_CORES;
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97
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98 //First core loop to start up gets this, which will schedule seed Pr
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99 //TODO: debug: check address of masterVirtPr
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100 writeVMSQ( masterEnv->masterVirtPr, workQ );
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101
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102 numProcrsCreated = 1; //global counter for debugging
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103
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104 //==================== malloc substitute ========================
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105 //
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106 //Testing whether malloc is using thread-local storage and therefore
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107 // causing unreliable behavior.
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108 //Just allocate a massive chunk of memory and roll own malloc/free and
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109 // make app use VMS__malloc_to, which will suspend and perform malloc
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110 // in the master, taking from this massive chunk.
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111
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112 // initFreeList();
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113 }
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114
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115 /*
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116 void
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117 initMasterMalloc()
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118 {
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119 _VMSMasterEnv->mallocChunk = malloc( MASSIVE_MALLOC_SIZE );
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120
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121 //The free-list element is the first several locations of an
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122 // allocated chunk -- the address given to the application is pre-
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123 // pended with both the ownership structure and the free-list struc.
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124 //So, write the values of these into the first locations of
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125 // mallocChunk -- which marks it as free & puts in its size.
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126 listElem = (FreeListElem *)_VMSMasterEnv->mallocChunk;
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127 listElem->size = MASSIVE_MALLOC_SIZE - NUM_PREPEND_BYTES
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128 listElem->next = NULL;
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129 }
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130
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131 void
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132 dissipateMasterMalloc()
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133 {
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134 //Just foo code -- to get going -- doing as if free list were link-list
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135 currElem = _VMSMasterEnv->freeList;
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136 while( currElem != NULL )
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137 {
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138 nextElem = currElem->next;
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139 masterFree( currElem );
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140 currElem = nextElem;
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141 }
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142 free( _VMSMasterEnv->freeList );
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143 }
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144 */
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145
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146 void
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147 create_sched_slots( MasterEnv *masterEnv )
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148 { SchedSlot **schedSlots, **filledSlots;
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149 int i;
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150
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151 schedSlots = malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
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152 filledSlots = malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
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153 masterEnv->schedSlots = schedSlots;
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154 masterEnv->filledSlots = filledSlots;
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155
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156 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
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157 {
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158 schedSlots[i] = malloc( sizeof(SchedSlot) );
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159
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160 //Set state to mean "handling requests done, slot needs filling"
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161 schedSlots[i]->workIsDone = FALSE;
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162 schedSlots[i]->needsProcrAssigned = TRUE;
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163 }
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164 }
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165
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166
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167 void
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168 create_the_coreLoop_OS_threads()
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169 {
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170 //========================================================================
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171 // Create the Threads
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172 int coreIdx, retCode;
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173
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174 //Need the threads to be created suspended, and wait for a signal
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175 // before proceeding -- gives time after creating to initialize other
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176 // stuff before the coreLoops set off.
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177 _VMSMasterEnv->setupComplete = 0;
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178
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179 //Make the threads that animate the core loops
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180 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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181 { coreLoopThdParams[coreIdx] = malloc( sizeof(ThdParams) );
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182 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
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183
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184 retCode =
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185 pthread_create( &(coreLoopThdHandles[coreIdx]),
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186 thdAttrs,
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187 &coreLoop,
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188 (void *)(coreLoopThdParams[coreIdx]) );
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189 if(retCode){printf("ERROR creating thread: %d\n", retCode); exit(0);}
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190 }
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191 }
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192
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193 /*Semantic layer calls this when it want the system to start running..
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194 *
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195 *This starts the core loops running then waits for them to exit.
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196 */
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197 void
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198 VMS__start_the_work_then_wait_until_done()
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199 { int coreIdx;
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200 //Start the core loops running
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201 //===========================================================================
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202 TSCount startCount, endCount;
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203 unsigned long long count = 0, freq = 0;
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204 double runTime;
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205
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206 startCount = getTSCount();
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207
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208 //tell the core loop threads that setup is complete
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209 //get lock, to lock out any threads still starting up -- they'll see
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210 // that setupComplete is true before entering while loop, and so never
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211 // wait on the condition
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212 pthread_mutex_lock( &suspendLock );
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213 _VMSMasterEnv->setupComplete = 1;
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214 pthread_mutex_unlock( &suspendLock );
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215 pthread_cond_broadcast( &suspend_cond );
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216
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217
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218 //wait for all to complete
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219 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
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220 {
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221 pthread_join( coreLoopThdHandles[coreIdx], NULL );
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222 }
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223
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224 //NOTE: do not clean up VMS env here -- semantic layer has to have
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225 // a chance to clean up its environment first, then do a call to free
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226 // the Master env and rest of VMS locations
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227
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228
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229 endCount = getTSCount();
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230 count = endCount - startCount;
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231
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232 runTime = (double)count / (double)TSCOUNT_FREQ;
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233
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234 printf("\n Time startup to shutdown: %f\n", runTime); fflush( stdin );
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235 }
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236
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237 /*Only difference between version with an OS thread pinned to each core and
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238 * the sequential version of VMS is VMS__init_Seq, this, and coreLoop_Seq.
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239 */
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240 void
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241 VMS__start_the_work_then_wait_until_done_Seq()
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242 {
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243 //Instead of un-suspending threads, just call the one and only
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244 // core loop (sequential version), in the main thread.
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245 coreLoop_Seq( NULL );
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246
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247 }
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248
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249
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250
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251 /*Create stack, then create __cdecl structure on it and put initialData and
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252 * pointer to the new structure instance into the parameter positions on
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253 * the stack
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254 *Then put function pointer into nextInstrPt -- the stack is setup in std
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255 * call structure, so jumping to function ptr is same as a GCC generated
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256 * function call
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257 *No need to save registers on old stack frame, because there's no old
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258 * animator state to return to --
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259 *
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260 */
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261 VirtProcr *
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262 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
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263 { VirtProcr *newPr;
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264 char *stackLocs, *stackPtr;
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265
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266 newPr = malloc( sizeof(VirtProcr) );
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267 newPr->procrID = numProcrsCreated++;
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268 newPr->nextInstrPt = fnPtr;
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269 newPr->initialData = initialData;
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270 newPr->requests = NULL;
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271
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272 //fnPtr takes two params -- void *initData & void *animProcr
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273 //alloc stack locations, make stackPtr be the highest addr minus room
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274 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
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275 // by stackPtr, initData at stackPtr + 4 bytes, animatingPr just above
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276 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
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277 if(stackLocs == 0) {perror("malloc stack"); exit(1);}
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278 newPr->startOfStack = stackLocs;
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279 stackPtr = ( (char *)stackLocs + VIRT_PROCR_STACK_SIZE - 0x10 );
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280 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
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281 *( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
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282 *( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
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283 newPr->stackPtr = stackPtr; //core loop will switch to this, then
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284 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
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285
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286 return newPr;
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287 }
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288
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289
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290 /*there is a label inside this function -- save the addr of this label in
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291 * the callingPr struc, as the pick-up point from which to start the next
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292 * work-unit for that procr. If turns out have to save registers, then
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293 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
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294 * "done with work-unit" label. The procr struc is in the request in the
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295 * slave that animated the just-ended work-unit, so all the state is saved
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296 * there, and will get passed along, inside the request handler, to the
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297 * next work-unit for that procr.
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298 */
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299 void
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300 VMS__suspend_procr( VirtProcr *callingPr )
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301 { void *jmpPt, *stackPtrAddr, *framePtrAddr, *coreLoopStackPtr;
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302 void *coreLoopFramePtr;
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303
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304 //The request to master will cause this suspended virt procr to get
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305 // scheduled again at some future point -- to resume, core loop jumps
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306 // to the resume point (below), which causes restore of saved regs and
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307 // "return" from this call.
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308 callingPr->nextInstrPt = &&ResumePt;
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309
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310 //return ownership of the virt procr and sched slot to Master virt pr
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311 callingPr->schedSlot->workIsDone = TRUE;
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312 // coreIdx = callingPr->coreAnimatedBy;
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313
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314 stackPtrAddr = &(callingPr->stackPtr);
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315 framePtrAddr = &(callingPr->framePtr);
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316
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317 jmpPt = callingPr->coreLoopStartPt;
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318 coreLoopFramePtr = callingPr->coreLoopFramePtr;//need this only
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319 coreLoopStackPtr = callingPr->coreLoopStackPtr;//shouldn't need -- safety
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320
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321 //Eclipse's compilation sequence complains -- so break into two
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322 // separate in-line assembly pieces
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323 //Save the virt procr's stack and frame ptrs,
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324 asm volatile("movl %0, %%eax; \
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|
325 movl %%esp, (%%eax); \
|
|
Me@18
|
326 movl %1, %%eax; \
|
|
Me@26
|
327 movl %%ebp, (%%eax) "\
|
|
Me@26
|
328 /* outputs */ : "=g" (stackPtrAddr), "=g" (framePtrAddr) \
|
|
Me@26
|
329 /* inputs */ : \
|
|
Me@26
|
330 /* clobber */ : "%eax" \
|
|
Me@26
|
331 );
|
|
Me@26
|
332
|
|
Me@26
|
333 //restore coreloop's frame ptr, then jump back to "start" of core loop
|
|
Me@26
|
334 //Note, GCC compiles to assembly that saves esp and ebp in the stack
|
|
Me@26
|
335 // frame -- so have to explicitly do assembly that saves to memory
|
|
Me@26
|
336 asm volatile("movl %0, %%eax; \
|
|
Me@26
|
337 movl %1, %%esp; \
|
|
Me@26
|
338 movl %2, %%ebp; \
|
|
Me@18
|
339 jmp %%eax " \
|
|
Me@26
|
340 /* outputs */ : \
|
|
Me@26
|
341 /* inputs */ : "m" (jmpPt), "m"(coreLoopStackPtr), "m"(coreLoopFramePtr)\
|
|
Me@18
|
342 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
|
|
Me@12
|
343 ); //list everything as clobbered to force GCC to save all
|
|
Me@12
|
344 // live vars that are in regs on stack before this
|
|
Me@12
|
345 // assembly, so that stack pointer is correct, before jmp
|
|
Me@1
|
346
|
|
Me@1
|
347 ResumePt:
|
|
Me@0
|
348 return;
|
|
Me@0
|
349 }
|
|
Me@0
|
350
|
|
Me@22
|
351
|
|
Me@22
|
352
|
|
Me@22
|
353 /*Not sure yet the form going to put "dissipate" in, so this is the third
|
|
Me@22
|
354 * possibility -- the semantic layer can just make a macro that looks like
|
|
Me@22
|
355 * a call to its name, then expands to a call to this.
|
|
Me@8
|
356 *
|
|
Me@22
|
357 *As of June 30, 2010 this looks like the top choice..
|
|
Me@8
|
358 *
|
|
Me@22
|
359 *This adds a request to dissipate, then suspends the processor so that the
|
|
Me@22
|
360 * request handler will receive the request. The request handler is what
|
|
Me@22
|
361 * does the work of freeing memory and removing the processor from the
|
|
Me@22
|
362 * semantic environment's data structures.
|
|
Me@22
|
363 *The request handler also is what figures out when to shutdown the VMS
|
|
Me@22
|
364 * system -- which causes all the core loop threads to die, and returns from
|
|
Me@22
|
365 * the call that started up VMS to perform the work.
|
|
Me@22
|
366 *
|
|
Me@22
|
367 *This form is a bit misleading to understand if one is trying to figure out
|
|
Me@22
|
368 * how VMS works -- it looks like a normal function call, but inside it
|
|
Me@22
|
369 * sends a request to the request handler and suspends the processor, which
|
|
Me@22
|
370 * jumps out of the VMS__dissipate_procr function, and out of all nestings
|
|
Me@22
|
371 * above it, transferring the work of dissipating to the request handler,
|
|
Me@22
|
372 * which then does the actual work -- causing the processor that animated
|
|
Me@22
|
373 * the call of this function to disappear and the "hanging" state of this
|
|
Me@22
|
374 * function to just poof into thin air -- the virtual processor's trace
|
|
Me@22
|
375 * never returns from this call, but instead the virtual processor's trace
|
|
Me@22
|
376 * gets suspended in this call and all the virt processor's state disap-
|
|
Me@22
|
377 * pears -- making that suspend the last thing in the virt procr's trace.
|
|
Me@8
|
378 */
|
|
Me@8
|
379 void
|
|
Me@22
|
380 VMS__dissipate_procr( VirtProcr *procrToDissipate )
|
|
Me@22
|
381 { VMSReqst *req;
|
|
Me@22
|
382
|
|
Me@22
|
383 req = malloc( sizeof(VMSReqst) );
|
|
Me@22
|
384 // req->virtProcrFrom = callingPr;
|
|
Me@22
|
385 req->reqType = dissipate;
|
|
Me@22
|
386 req->nextReqst = procrToDissipate->requests;
|
|
Me@22
|
387 procrToDissipate->requests = req;
|
|
Me@22
|
388
|
|
Me@22
|
389 VMS__suspend_procr( procrToDissipate );
|
|
Me@22
|
390 }
|
|
Me@22
|
391
|
|
Me@22
|
392
|
|
Me@22
|
393 /*This inserts the semantic-layer's request data into standard VMS carrier
|
|
Me@22
|
394 */
|
|
Me@22
|
395 inline void
|
|
Me@24
|
396 VMS__add_sem_request( void *semReqData, VirtProcr *callingPr )
|
|
Me@22
|
397 { VMSReqst *req;
|
|
Me@22
|
398
|
|
Me@22
|
399 req = malloc( sizeof(VMSReqst) );
|
|
Me@22
|
400 // req->virtProcrFrom = callingPr;
|
|
Me@22
|
401 req->reqType = semantic;
|
|
Me@22
|
402 req->semReqData = semReqData;
|
|
Me@22
|
403 req->nextReqst = callingPr->requests;
|
|
Me@22
|
404 callingPr->requests = req;
|
|
Me@22
|
405 }
|
|
Me@22
|
406
|
|
Me@22
|
407
|
|
Me@22
|
408
|
|
Me@22
|
409 //TODO: add a semantic-layer supplied "freer" for the semantic-data portion
|
|
Me@22
|
410 // of a request -- IE call with both a virt procr and a fn-ptr to request
|
|
Me@22
|
411 // freer (or maybe put request freer as a field in virt procr?)
|
|
Me@22
|
412 void
|
|
Me@22
|
413 VMS__remove_and_free_top_request( VirtProcr *procrWithReq )
|
|
Me@22
|
414 { VMSReqst *req;
|
|
Me@22
|
415
|
|
Me@22
|
416 req = procrWithReq->requests;
|
|
Me@29
|
417 if( req == NULL ) return;
|
|
Me@22
|
418 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@29
|
419 VMS__free_request( req );
|
|
Me@22
|
420 }
|
|
Me@22
|
421
|
|
Me@24
|
422
|
|
Me@24
|
423 //TODO: add a semantic-layer supplied "freer" for the semantic-data portion
|
|
Me@24
|
424 // of a request -- IE call with both a virt procr and a fn-ptr to request
|
|
Me@24
|
425 // freer (also maybe put sem request freer as a field in virt procr?)
|
|
Me@37
|
426 //SSR relies right now on this only freeing VMS layer of request -- the
|
|
Me@26
|
427 // semantic portion of request is alloc'd and freed by request handler
|
|
Me@22
|
428 void
|
|
Me@24
|
429 VMS__free_request( VMSReqst *req )
|
|
Me@24
|
430 {
|
|
Me@24
|
431 free( req );
|
|
Me@24
|
432 }
|
|
Me@24
|
433
|
|
Me@24
|
434 VMSReqst *
|
|
Me@24
|
435 VMS__take_top_request_from( VirtProcr *procrWithReq )
|
|
Me@24
|
436 { VMSReqst *req;
|
|
Me@24
|
437
|
|
Me@24
|
438 req = procrWithReq->requests;
|
|
Me@24
|
439 if( req == NULL ) return req;
|
|
Me@24
|
440
|
|
Me@24
|
441 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@24
|
442 return req;
|
|
Me@24
|
443 }
|
|
Me@24
|
444
|
|
Me@32
|
445 VMSReqst *
|
|
Me@32
|
446 VMS__free_top_and_give_next_request_from( VirtProcr *procrWithReq )
|
|
Me@32
|
447 { VMSReqst *req;
|
|
Me@32
|
448
|
|
Me@32
|
449 req = procrWithReq->requests;
|
|
Me@32
|
450 if( req == NULL ) return req;
|
|
Me@32
|
451
|
|
Me@32
|
452 procrWithReq->requests = procrWithReq->requests->nextReqst;
|
|
Me@32
|
453 VMS__free_request( req );
|
|
Me@32
|
454 return procrWithReq->requests;
|
|
Me@32
|
455 }
|
|
Me@32
|
456
|
|
Me@32
|
457
|
|
Me@24
|
458 inline int
|
|
Me@24
|
459 VMS__isSemanticReqst( VMSReqst *req )
|
|
Me@22
|
460 {
|
|
Me@24
|
461 return ( req->reqType == semantic );
|
|
Me@24
|
462 }
|
|
Me@22
|
463
|
|
Me@24
|
464
|
|
Me@24
|
465 inline void *
|
|
Me@24
|
466 VMS__take_sem_reqst_from( VMSReqst *req )
|
|
Me@24
|
467 {
|
|
Me@24
|
468 return req->semReqData;
|
|
Me@24
|
469 }
|
|
Me@24
|
470
|
|
Me@24
|
471 inline int
|
|
Me@24
|
472 VMS__isDissipateReqst( VMSReqst *req )
|
|
Me@24
|
473 {
|
|
Me@24
|
474 return ( req->reqType == dissipate );
|
|
Me@24
|
475 }
|
|
Me@24
|
476
|
|
Me@24
|
477 inline int
|
|
Me@24
|
478 VMS__isCreateReqst( VMSReqst *req )
|
|
Me@24
|
479 {
|
|
Me@24
|
480 return ( req->reqType == regCreated );
|
|
Me@24
|
481 }
|
|
Me@24
|
482
|
|
Me@24
|
483 void
|
|
Me@24
|
484 VMS__send_register_new_procr_request(VirtProcr *newPr, VirtProcr *reqstingPr)
|
|
Me@24
|
485 { VMSReqst *req;
|
|
Me@24
|
486
|
|
Me@24
|
487 req = malloc( sizeof(VMSReqst) );
|
|
Me@24
|
488 req->reqType = regCreated;
|
|
Me@24
|
489 req->semReqData = newPr;
|
|
Me@24
|
490 req->nextReqst = reqstingPr->requests;
|
|
Me@24
|
491 reqstingPr->requests = req;
|
|
Me@24
|
492
|
|
Me@24
|
493 VMS__suspend_procr( reqstingPr );
|
|
Me@22
|
494 }
|
|
Me@22
|
495
|
|
Me@22
|
496
|
|
Me@22
|
497
|
|
Me@24
|
498 /*This must be called by the request handler plugin -- it cannot be called
|
|
Me@24
|
499 * from the semantic library "dissipate processor" function -- instead, the
|
|
Me@24
|
500 * semantic layer has to generate a request for the plug-in to call this
|
|
Me@24
|
501 * function.
|
|
Me@24
|
502 *The reason is that this frees the virtual processor's stack -- which is
|
|
Me@24
|
503 * still in use inside semantic library calls!
|
|
Me@24
|
504 *
|
|
Me@24
|
505 *This frees or recycles all the state owned by and comprising the VMS
|
|
Me@24
|
506 * portion of the animating virtual procr. The request handler must first
|
|
Me@24
|
507 * free any semantic data created for the processor that didn't use the
|
|
Me@24
|
508 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
|
|
Me@24
|
509 * system to disown any state that did use VMS_malloc, and then frees the
|
|
Me@24
|
510 * statck and the processor-struct itself.
|
|
Me@24
|
511 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
|
|
Me@24
|
512 * state, then that state gets freed (or sent to recycling) as a side-effect
|
|
Me@24
|
513 * of dis-owning it.
|
|
Me@24
|
514 */
|
|
Me@24
|
515 void
|
|
Me@29
|
516 VMS__handle_dissipate_reqst( VirtProcr *animatingPr )
|
|
Me@24
|
517 {
|
|
Me@24
|
518 //dis-own all locations owned by this processor, causing to be freed
|
|
Me@24
|
519 // any locations that it is (was) sole owner of
|
|
Me@29
|
520 //TODO: implement VMS__malloc system, including "give up ownership"
|
|
Me@24
|
521
|
|
Me@24
|
522 //The dissipate request might still be attached, so remove and free it
|
|
Me@24
|
523 VMS__remove_and_free_top_request( animatingPr );
|
|
Me@24
|
524
|
|
Me@24
|
525 //NOTE: initialData was given to the processor, so should either have
|
|
Me@24
|
526 // been alloc'd with VMS__malloc, or freed by the level above animPr.
|
|
Me@24
|
527 //So, all that's left to free here is the stack and the VirtProcr struc
|
|
Me@24
|
528 // itself
|
|
Me@24
|
529 free( animatingPr->startOfStack );
|
|
Me@24
|
530 free( animatingPr );
|
|
Me@24
|
531 }
|
|
Me@24
|
532
|
|
Me@24
|
533
|
|
Me@29
|
534 //TODO: re-architect so that have clean separation between request handler
|
|
Me@29
|
535 // and master loop, for dissipate, create, shutdown, and other non-semantic
|
|
Me@29
|
536 // requests. Issue is chain: one removes requests from AppVP, one dispatches
|
|
Me@29
|
537 // on type of request, and one handles each type.. but some types require
|
|
Me@29
|
538 // action from both request handler and master loop -- maybe just give the
|
|
Me@29
|
539 // request handler calls like: VMS__handle_X_request_type
|
|
Me@24
|
540
|
|
Me@29
|
541 void
|
|
Me@29
|
542 endOSThreadFn( void *initData, VirtProcr *animatingPr );
|
|
Me@29
|
543
|
|
Me@29
|
544 /*This is called by the semantic layer's request handler when it decides its
|
|
Me@29
|
545 * time to shut down the VMS system. Calling this causes the core loop OS
|
|
Me@29
|
546 * threads to exit, which unblocks the entry-point function that started up
|
|
Me@29
|
547 * VMS, and allows it to grab the result and return to the original single-
|
|
Me@29
|
548 * threaded application.
|
|
Me@22
|
549 *
|
|
Me@29
|
550 *The _VMSMasterEnv is needed by this shut down function, so the create-seed-
|
|
Me@29
|
551 * and-wait function has to free a bunch of stuff after it detects the
|
|
Me@29
|
552 * threads have all died: the masterEnv, the thread-related locations,
|
|
Me@29
|
553 * masterVP any AppVPs that might still be allocated and sitting in the
|
|
Me@29
|
554 * semantic environment, or have been orphaned in the _VMSWorkQ.
|
|
Me@29
|
555 *
|
|
Me@29
|
556 *NOTE: the semantic plug-in is expected to use VMS__malloc_to to get all the
|
|
Me@29
|
557 * locations it needs, and give ownership to masterVP. Then, they will be
|
|
Me@29
|
558 * automatically freed when the masterVP is dissipated. (This happens after
|
|
Me@29
|
559 * the core loop threads have all exited)
|
|
Me@22
|
560 *
|
|
Me@29
|
561 *In here,create one core-loop shut-down processor for each core loop and put
|
|
Me@29
|
562 * them all directly into the workQ.
|
|
Me@29
|
563 *Note, this function can ONLY be called after the semantic environment no
|
|
Me@29
|
564 * longer cares if AppVPs get animated after the point this is called. In
|
|
Me@29
|
565 * other words, this can be used as an abort, or else it should only be
|
|
Me@29
|
566 * called when all AppVPs have finished dissipate requests -- only at that
|
|
Me@29
|
567 * point is it sure that all results have completed.
|
|
Me@22
|
568 */
|
|
Me@22
|
569 void
|
|
Me@29
|
570 VMS__handle_shutdown_reqst( void *dummy, VirtProcr *animatingPr )
|
|
Me@8
|
571 { int coreIdx;
|
|
Me@14
|
572 VirtProcr *shutDownPr;
|
|
Me@26
|
573 VMSQueueStruc *workQ = _VMSWorkQ;
|
|
Me@22
|
574
|
|
Me@29
|
575 //create the shutdown processors, one for each core loop -- put them
|
|
Me@29
|
576 // directly into _VMSWorkQ -- each core will die when gets one, so
|
|
Me@29
|
577 // the system distributes them evenly itself.
|
|
Me@8
|
578 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
|
|
Me@8
|
579 {
|
|
Me@29
|
580 shutDownPr = VMS__create_procr( &endOSThreadFn, NULL );
|
|
Me@26
|
581 writeVMSQ( shutDownPr, workQ );
|
|
Me@8
|
582 }
|
|
Me@22
|
583
|
|
Me@12
|
584 }
|
|
Me@12
|
585
|
|
Me@12
|
586
|
|
Me@29
|
587 /*Am trying to be cute, avoiding IF statement in coreLoop that checks for
|
|
Me@29
|
588 * a special shutdown procr. Ended up with extra-complex shutdown sequence.
|
|
Me@29
|
589 *This function has the sole purpose of setting the stack and framePtr
|
|
Me@29
|
590 * to the coreLoop's stack and framePtr.. it does that then jumps to the
|
|
Me@29
|
591 * core loop's shutdown point -- might be able to just call Pthread_exit
|
|
Me@30
|
592 * from here, but am going back to the pthread's stack and setting everything
|
|
Me@29
|
593 * up just as if it never jumped out, before calling pthread_exit.
|
|
Me@29
|
594 *The end-point of core loop will free the stack and so forth of the
|
|
Me@29
|
595 * processor that animates this function, (this fn is transfering the
|
|
Me@29
|
596 * animator of the AppVP that is in turn animating this function over
|
|
Me@29
|
597 * to core loop function -- note that this slices out a level of virtual
|
|
Me@29
|
598 * processors).
|
|
Me@29
|
599 */
|
|
Me@29
|
600 void
|
|
Me@29
|
601 endOSThreadFn( void *initData, VirtProcr *animatingPr )
|
|
Me@29
|
602 { void *jmpPt, *coreLoopStackPtr, *coreLoopFramePtr;
|
|
Me@29
|
603
|
|
Me@29
|
604 jmpPt = _VMSMasterEnv->coreLoopEndPt;
|
|
Me@29
|
605 coreLoopStackPtr = animatingPr->coreLoopStackPtr;
|
|
Me@29
|
606 coreLoopFramePtr = animatingPr->coreLoopFramePtr;
|
|
Me@29
|
607
|
|
Me@29
|
608
|
|
Me@29
|
609 asm volatile("movl %0, %%eax; \
|
|
Me@29
|
610 movl %1, %%esp; \
|
|
Me@29
|
611 movl %2, %%ebp; \
|
|
Me@29
|
612 jmp %%eax " \
|
|
Me@29
|
613 /* outputs */ : \
|
|
Me@29
|
614 /* inputs */ : "m" (jmpPt), "m"(coreLoopStackPtr), "m"(coreLoopFramePtr)\
|
|
Me@29
|
615 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
|
|
Me@29
|
616 );
|
|
Me@29
|
617 }
|
|
Me@29
|
618
|
|
Me@29
|
619
|
|
Me@29
|
620
|
|
Me@30
|
621 /*This is called after the threads have shut down and control as returned
|
|
Me@30
|
622 * to the semantic layer, in the entry point function in the main thread.
|
|
Me@30
|
623 * It has to free anything allocated during VMS_init, and any other alloc'd
|
|
Me@24
|
624 * locations that might be left over.
|
|
Me@24
|
625 */
|
|
Me@24
|
626 void
|
|
Me@29
|
627 VMS__cleanup_after_shutdown()
|
|
Me@24
|
628 { int i;
|
|
Me@24
|
629
|
|
Me@24
|
630 free( _VMSWorkQ );
|
|
Me@24
|
631 free( _VMSMasterEnv->filledSlots );
|
|
Me@24
|
632 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
|
|
Me@24
|
633 {
|
|
Me@24
|
634 free( _VMSMasterEnv->schedSlots[i] );
|
|
Me@24
|
635 }
|
|
Me@24
|
636
|
|
Me@24
|
637 free( _VMSMasterEnv->schedSlots);
|
|
Me@29
|
638 VMS__handle_dissipate_reqst( _VMSMasterEnv->masterVirtPr );
|
|
Me@24
|
639
|
|
Me@24
|
640 free( _VMSMasterEnv );
|
|
Me@24
|
641 }
|
|
Me@24
|
642
|
|
Me@24
|
643
|
|
Me@24
|
644 //===========================================================================
|
|
Me@12
|
645
|
|
Me@12
|
646 inline TSCount getTSCount()
|
|
Me@12
|
647 { unsigned int low, high;
|
|
Me@12
|
648 TSCount out;
|
|
Me@12
|
649
|
|
Me@12
|
650 saveTimeStampCountInto( low, high );
|
|
Me@12
|
651 out = high;
|
|
Me@12
|
652 out = (out << 32) + low;
|
|
Me@12
|
653 return out;
|
|
Me@12
|
654 }
|
|
Me@12
|
655
|
