annotate VMS.c @ 24:2b161e1a50ee

1st working version -- as far as can tell due to SEH bugs
author Me
date Wed, 07 Jul 2010 13:15:54 -0700
parents 1dbc7f6e3e67
children c556193f7211
rev   line source
Me@0 1 /*
Me@0 2 * Copyright 2010 OpenSourceCodeStewardshipFoundation
Me@0 3 *
Me@0 4 * Licensed under BSD
Me@0 5 */
Me@0 6
Me@0 7 #include <stdio.h>
Me@0 8 #include <stdlib.h>
Me@0 9 #include <malloc.h>
Me@0 10
Me@0 11 #include "VMS.h"
Me@0 12 #include "Queue_impl/BlockingQueue.h"
Me@0 13
Me@0 14
Me@22 15 //===========================================================================
Me@22 16 void
Me@22 17 shutdownFn( void *dummy, VirtProcr *dummy2 );
Me@22 18
Me@22 19 void
Me@22 20 create_sched_slots( MasterEnv *masterEnv );
Me@22 21
Me@22 22 //===========================================================================
Me@22 23
Me@0 24 /*Setup has two phases:
Me@0 25 * 1) Semantic layer first calls init_VMS, which creates masterEnv, and puts
Me@8 26 * the master virt procr into the work-queue, ready for first "call"
Me@8 27 * 2) Semantic layer then does its own init, which creates the seed virt
Me@8 28 * procr inside the semantic layer, ready to schedule it when
Me@0 29 * asked by the first run of the masterLoop.
Me@0 30 *
Me@0 31 *This part is bit weird because VMS really wants to be "always there", and
Me@0 32 * have applications attach and detach.. for now, this VMS is part of
Me@0 33 * the app, so the VMS system starts up as part of running the app.
Me@0 34 *
Me@8 35 *The semantic layer is isolated from the VMS internals by making the
Me@8 36 * semantic layer do setup to a state that it's ready with its
Me@8 37 * initial virt procrs, ready to schedule them to slots when the masterLoop
Me@0 38 * asks. Without this pattern, the semantic layer's setup would
Me@8 39 * have to modify slots directly to assign the initial virt-procrs, and put
Me@0 40 * them into the workQ itself, breaking the isolation completely.
Me@0 41 *
Me@0 42 *
Me@8 43 *The semantic layer creates the initial virt procr(s), and adds its
Me@8 44 * own environment to masterEnv, and fills in the pointers to
Me@0 45 * the requestHandler and slaveScheduler plug-in functions
Me@8 46 */
Me@8 47
Me@8 48 /*This allocates VMS data structures, populates the master VMSProc,
Me@0 49 * and master environment, and returns the master environment to the semantic
Me@0 50 * layer.
Me@0 51 */
Me@8 52 void
Me@8 53 VMS__init()
Me@1 54 { MasterEnv *masterEnv;
Me@12 55 CASQueueStruc *workQ;
Me@1 56
Me@0 57 //Make the central work-queue
Me@12 58 _VMSWorkQ = makeCASQ();
Me@1 59 workQ = _VMSWorkQ;
Me@0 60
Me@1 61 _VMSMasterEnv = malloc( sizeof(MasterEnv) );
Me@1 62 masterEnv = _VMSMasterEnv;
Me@0 63
Me@8 64 //create the master virtual processor
Me@8 65 masterEnv->masterVirtPr = VMS__create_procr( &masterLoop, masterEnv );
Me@0 66
Me@1 67 create_sched_slots( masterEnv );
Me@0 68
Me@8 69 //Set slot 0 to be the master virt procr & set flags just in case
Me@8 70 masterEnv->schedSlots[0]->needsProcrAssigned = FALSE; //says don't touch
Me@8 71 masterEnv->schedSlots[0]->workIsDone = FALSE; //says don't touch
Me@1 72 masterEnv->schedSlots[0]->procrAssignedToSlot = masterEnv->masterVirtPr;
Me@22 73 masterEnv->masterVirtPr->schedSlot = masterEnv->schedSlots[0];
Me@24 74 masterEnv->stillRunning = FALSE;
Me@22 75
Me@1 76 //First core loop to start up gets this, which will schedule seed Pr
Me@1 77 //TODO: debug: check address of masterVirtPr
Me@22 78 writeCASQ( masterEnv->masterVirtPr, workQ );
Me@12 79
Me@12 80 numProcrsCreated = 1;
Me@24 81
Me@24 82 //========================================================================
Me@24 83 // Create the Threads
Me@24 84 int coreIdx;
Me@24 85
Me@24 86 //Make params given to the win threads that animate the core loops
Me@24 87 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@24 88 { coreLoopThdParams[coreIdx] = malloc( sizeof(ThdParams) );
Me@24 89 coreLoopThdParams[coreIdx]->coreNum = coreIdx;
Me@24 90
Me@24 91 //make the core loop threads, born in suspended state
Me@24 92 coreLoopThdHandles[ coreIdx ] =
Me@24 93 CreateThread ( NULL, // Security attributes
Me@24 94 0, // Stack size
Me@24 95 coreLoop,
Me@24 96 coreLoopThdParams[coreIdx],
Me@24 97 CREATE_SUSPENDED,
Me@24 98 &(coreLoopThdIds[coreIdx])
Me@24 99 );
Me@24 100 }
Me@24 101
Me@0 102 }
Me@0 103
Me@0 104
Me@0 105 void
Me@1 106 create_sched_slots( MasterEnv *masterEnv )
Me@8 107 { SchedSlot **schedSlots, **filledSlots;
Me@0 108 int i;
Me@0 109
Me@8 110 schedSlots = malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
Me@8 111 filledSlots = malloc( NUM_SCHED_SLOTS * sizeof(SchedSlot *) );
Me@8 112 masterEnv->schedSlots = schedSlots;
Me@8 113 masterEnv->filledSlots = filledSlots;
Me@8 114
Me@1 115 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@0 116 {
Me@8 117 schedSlots[i] = malloc( sizeof(SchedSlot) );
Me@8 118
Me@1 119 //Set state to mean "handling requests done, slot needs filling"
Me@8 120 schedSlots[i]->workIsDone = FALSE;
Me@8 121 schedSlots[i]->needsProcrAssigned = TRUE;
Me@0 122 }
Me@0 123 }
Me@0 124
Me@8 125
Me@0 126 /*Semantic layer calls this when it want the system to start running..
Me@0 127 *
Me@24 128 *This starts the core loops running then waits for them to exit.
Me@0 129 */
Me@12 130 void
Me@24 131 VMS__start_the_work_then_wait_until_done()
Me@12 132 { int coreIdx;
Me@24 133 //Start the core loops running
Me@24 134 //===========================================================================
Me@24 135 LARGE_INTEGER stPerfCount, endPerfCount, countFreq;
Me@24 136 unsigned long long count = 0, freq = 0;
Me@24 137 double runTime;
Me@0 138
Me@24 139 QueryPerformanceCounter( &stPerfCount );
Me@24 140
Me@24 141 //start them running
Me@24 142 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@24 143 { //Create the threads
Me@24 144 ResumeThread( coreLoopThdHandles[coreIdx] ); //starts thread
Me@24 145 }
Me@24 146
Me@24 147 //wait for all to complete
Me@8 148 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@8 149 {
Me@24 150 WaitForSingleObject(coreLoopThdHandles[coreIdx], INFINITE);
Me@24 151 }
Me@0 152
Me@24 153 //NOTE: do not clean up VMS env here -- semantic layer has to have
Me@24 154 // a chance to clean up its environment first, then do a call to free
Me@24 155 // the Master env and rest of VMS locations
Me@24 156
Me@24 157 QueryPerformanceCounter( &endPerfCount );
Me@24 158 count = endPerfCount.QuadPart - stPerfCount.QuadPart;
Me@24 159
Me@24 160 QueryPerformanceFrequency( &countFreq );
Me@24 161 freq = countFreq.QuadPart;
Me@24 162 runTime = (double)count / (double)freq;
Me@24 163
Me@24 164 printf("\n Time startup to shutdown: %f\n", runTime);
Me@24 165 fflush( stdin );
Me@8 166 }
Me@0 167
Me@0 168
Me@0 169
Me@8 170 /*Create stack, then create __cdecl structure on it and put initialData and
Me@8 171 * pointer to the new structure instance into the parameter positions on
Me@8 172 * the stack
Me@8 173 *Then put function pointer into nextInstrPt -- the stack is setup in std
Me@8 174 * call structure, so jumping to function ptr is same as a GCC generated
Me@8 175 * function call
Me@8 176 *No need to save registers on old stack frame, because there's no old
Me@8 177 * animator state to return to --
Me@8 178 *
Me@8 179 */
Me@8 180 VirtProcr *
Me@8 181 VMS__create_procr( VirtProcrFnPtr fnPtr, void *initialData )
Me@8 182 { VirtProcr *newPr;
Me@8 183 char *stackLocs, *stackPtr;
Me@8 184
Me@8 185 newPr = malloc( sizeof(VirtProcr) );
Me@12 186 newPr->procrID = numProcrsCreated++;
Me@8 187 newPr->nextInstrPt = fnPtr;
Me@8 188 newPr->initialData = initialData;
Me@8 189
Me@14 190 //fnPtr takes two params -- void *initData & void *animProcr
Me@8 191 //alloc stack locations, make stackPtr be the highest addr minus room
Me@14 192 // for 2 params + return addr. Return addr (NULL) is in loc pointed to
Me@14 193 // by stackPtr, initData at stackPtr + 4 bytes, animatingPr just above
Me@22 194 stackLocs = malloc( VIRT_PROCR_STACK_SIZE );
Me@22 195 newPr->startOfStack = stackLocs;
Me@22 196 stackPtr = ( (char *)stackLocs + VIRT_PROCR_STACK_SIZE - 0x10 );
Me@8 197 //setup __cdecl on stack -- coreloop will switch to stackPtr before jmp
Me@22 198 *( (int *)stackPtr + 2 ) = (int) newPr; //rightmost param -- 32bit pointer
Me@14 199 *( (int *)stackPtr + 1 ) = (int) initialData; //next param to left
Me@8 200 newPr->stackPtr = stackPtr; //core loop will switch to this, then
Me@8 201 newPr->framePtr = stackPtr; //suspend loop will save new stack & frame ptr
Me@8 202
Me@8 203 return newPr;
Me@8 204 }
Me@8 205
Me@8 206
Me@0 207 /*there is a label inside this function -- save the addr of this label in
Me@0 208 * the callingPr struc, as the pick-up point from which to start the next
Me@0 209 * work-unit for that procr. If turns out have to save registers, then
Me@0 210 * save them in the procr struc too. Then do assembly jump to the CoreLoop's
Me@0 211 * "done with work-unit" label. The procr struc is in the request in the
Me@0 212 * slave that animated the just-ended work-unit, so all the state is saved
Me@0 213 * there, and will get passed along, inside the request handler, to the
Me@0 214 * next work-unit for that procr.
Me@0 215 */
Me@8 216 void
Me@22 217 VMS__suspend_procr( VirtProcr *callingPr )
Me@14 218 { void *jmpPt, *stackPtrAddr, *framePtrAddr, *coreLoopStackPtr;
Me@14 219 void *coreLoopFramePtr;
Me@0 220
Me@14 221 //The request to master will cause this suspended virt procr to get
Me@14 222 // scheduled again at some future point -- to resume, core loop jumps
Me@14 223 // to the resume point (below), which causes restore of saved regs and
Me@14 224 // "return" from this call.
Me@1 225 callingPr->nextInstrPt = &&ResumePt;
Me@1 226
Me@1 227 //return ownership of the virt procr and sched slot to Master virt pr
Me@1 228 callingPr->schedSlot->workIsDone = TRUE;
Me@14 229 // coreIdx = callingPr->coreAnimatedBy;
Me@1 230
Me@18 231 stackPtrAddr = &(callingPr->stackPtr);
Me@18 232 framePtrAddr = &(callingPr->framePtr);
Me@14 233
Me@14 234 jmpPt = callingPr->coreLoopStartPt;
Me@14 235 coreLoopFramePtr = callingPr->coreLoopFramePtr;//need this only
Me@18 236 coreLoopStackPtr = callingPr->coreLoopStackPtr;//shouldn't need -- safety
Me@1 237
Me@14 238 //Save the virt procr's stack and frame ptrs, restore coreloop's frame
Me@14 239 // ptr, then jump back to "start" of core loop
Me@22 240 //Note, GCC compiles to assembly that saves esp and ebp in the stack
Me@22 241 // frame -- so have to explicitly do assembly that saves to memory
Me@18 242 asm volatile("movl %0, %%eax; \
Me@18 243 movl %%esp, (%%eax); \
Me@18 244 movl %1, %%eax; \
Me@18 245 movl %%ebp, (%%eax); \
Me@18 246 movl %2, %%eax; \
Me@18 247 movl %3, %%esp; \
Me@18 248 movl %4, %%ebp; \
Me@18 249 jmp %%eax " \
Me@18 250 /* outputs */ : "=g" (stackPtrAddr), "=g" (framePtrAddr) \
Me@18 251 /* inputs */ : "g" (jmpPt), "g"(coreLoopStackPtr), "g"(coreLoopFramePtr)\
Me@18 252 /* clobber */ : "memory", "%eax", "%ebx", "%ecx", "%edx", "%edi","%esi" \
Me@12 253 ); //list everything as clobbered to force GCC to save all
Me@12 254 // live vars that are in regs on stack before this
Me@12 255 // assembly, so that stack pointer is correct, before jmp
Me@1 256
Me@1 257 ResumePt:
Me@0 258 return;
Me@0 259 }
Me@0 260
Me@22 261
Me@22 262
Me@22 263 /*This is equivalent to "jump back to core loop" -- it's mainly only used
Me@22 264 * just after adding dissipate request to a processor -- so the semantic
Me@22 265 * layer is the only place it will be seen and/or used.
Me@22 266 *
Me@22 267 *It does almost the same thing as suspend, except don't need to save the
Me@22 268 * stack nor set the nextInstrPt
Me@22 269 *
Me@22 270 *As of June 30, 2010 just implementing as a call to suspend -- just sugar
Me@22 271 */
Me@8 272 void
Me@22 273 VMS__return_from_fn( VirtProcr *animatingPr )
Me@8 274 {
Me@22 275 VMS__suspend_procr( animatingPr );
Me@1 276 }
Me@1 277
Me@22 278
Me@22 279 /*Not sure yet the form going to put "dissipate" in, so this is the third
Me@22 280 * possibility -- the semantic layer can just make a macro that looks like
Me@22 281 * a call to its name, then expands to a call to this.
Me@8 282 *
Me@22 283 *As of June 30, 2010 this looks like the top choice..
Me@8 284 *
Me@22 285 *This adds a request to dissipate, then suspends the processor so that the
Me@22 286 * request handler will receive the request. The request handler is what
Me@22 287 * does the work of freeing memory and removing the processor from the
Me@22 288 * semantic environment's data structures.
Me@22 289 *The request handler also is what figures out when to shutdown the VMS
Me@22 290 * system -- which causes all the core loop threads to die, and returns from
Me@22 291 * the call that started up VMS to perform the work.
Me@22 292 *
Me@22 293 *This form is a bit misleading to understand if one is trying to figure out
Me@22 294 * how VMS works -- it looks like a normal function call, but inside it
Me@22 295 * sends a request to the request handler and suspends the processor, which
Me@22 296 * jumps out of the VMS__dissipate_procr function, and out of all nestings
Me@22 297 * above it, transferring the work of dissipating to the request handler,
Me@22 298 * which then does the actual work -- causing the processor that animated
Me@22 299 * the call of this function to disappear and the "hanging" state of this
Me@22 300 * function to just poof into thin air -- the virtual processor's trace
Me@22 301 * never returns from this call, but instead the virtual processor's trace
Me@22 302 * gets suspended in this call and all the virt processor's state disap-
Me@22 303 * pears -- making that suspend the last thing in the virt procr's trace.
Me@8 304 */
Me@8 305 void
Me@22 306 VMS__dissipate_procr( VirtProcr *procrToDissipate )
Me@22 307 { VMSReqst *req;
Me@22 308
Me@22 309 req = malloc( sizeof(VMSReqst) );
Me@22 310 // req->virtProcrFrom = callingPr;
Me@22 311 req->reqType = dissipate;
Me@22 312 req->nextReqst = procrToDissipate->requests;
Me@22 313 procrToDissipate->requests = req;
Me@22 314
Me@22 315 VMS__suspend_procr( procrToDissipate );
Me@22 316 }
Me@22 317
Me@22 318
Me@22 319 /*This inserts the semantic-layer's request data into standard VMS carrier
Me@22 320 */
Me@22 321 inline void
Me@24 322 VMS__add_sem_request( void *semReqData, VirtProcr *callingPr )
Me@22 323 { VMSReqst *req;
Me@22 324
Me@22 325 req = malloc( sizeof(VMSReqst) );
Me@22 326 // req->virtProcrFrom = callingPr;
Me@22 327 req->reqType = semantic;
Me@22 328 req->semReqData = semReqData;
Me@22 329 req->nextReqst = callingPr->requests;
Me@22 330 callingPr->requests = req;
Me@22 331 }
Me@22 332
Me@22 333
Me@22 334
Me@22 335 //TODO: add a semantic-layer supplied "freer" for the semantic-data portion
Me@22 336 // of a request -- IE call with both a virt procr and a fn-ptr to request
Me@22 337 // freer (or maybe put request freer as a field in virt procr?)
Me@22 338 void
Me@22 339 VMS__remove_and_free_top_request( VirtProcr *procrWithReq )
Me@22 340 { VMSReqst *req;
Me@22 341
Me@22 342 req = procrWithReq->requests;
Me@22 343 procrWithReq->requests = procrWithReq->requests->nextReqst;
Me@22 344 free( req );
Me@22 345 }
Me@22 346
Me@24 347
Me@24 348 //TODO: add a semantic-layer supplied "freer" for the semantic-data portion
Me@24 349 // of a request -- IE call with both a virt procr and a fn-ptr to request
Me@24 350 // freer (also maybe put sem request freer as a field in virt procr?)
Me@22 351 void
Me@24 352 VMS__free_request( VMSReqst *req )
Me@24 353 {
Me@24 354 free( req );
Me@24 355 }
Me@24 356
Me@24 357 VMSReqst *
Me@24 358 VMS__take_top_request_from( VirtProcr *procrWithReq )
Me@24 359 { VMSReqst *req;
Me@24 360
Me@24 361 req = procrWithReq->requests;
Me@24 362 if( req == NULL ) return req;
Me@24 363
Me@24 364 procrWithReq->requests = procrWithReq->requests->nextReqst;
Me@24 365 return req;
Me@24 366 }
Me@24 367
Me@24 368 inline int
Me@24 369 VMS__isSemanticReqst( VMSReqst *req )
Me@22 370 {
Me@24 371 return ( req->reqType == semantic );
Me@24 372 }
Me@22 373
Me@24 374
Me@24 375 inline void *
Me@24 376 VMS__take_sem_reqst_from( VMSReqst *req )
Me@24 377 {
Me@24 378 return req->semReqData;
Me@24 379 }
Me@24 380
Me@24 381 inline int
Me@24 382 VMS__isDissipateReqst( VMSReqst *req )
Me@24 383 {
Me@24 384 return ( req->reqType == dissipate );
Me@24 385 }
Me@24 386
Me@24 387 inline int
Me@24 388 VMS__isCreateReqst( VMSReqst *req )
Me@24 389 {
Me@24 390 return ( req->reqType == regCreated );
Me@24 391 }
Me@24 392
Me@24 393 void
Me@24 394 VMS__send_register_new_procr_request(VirtProcr *newPr, VirtProcr *reqstingPr)
Me@24 395 { VMSReqst *req;
Me@24 396
Me@24 397 req = malloc( sizeof(VMSReqst) );
Me@24 398 req->reqType = regCreated;
Me@24 399 req->semReqData = newPr;
Me@24 400 req->nextReqst = reqstingPr->requests;
Me@24 401 reqstingPr->requests = req;
Me@24 402
Me@24 403 VMS__suspend_procr( reqstingPr );
Me@22 404 }
Me@22 405
Me@22 406
Me@22 407 /*The semantic layer figures out when the work is done ( perhaps by a call
Me@22 408 * in the application to "work all done", or perhaps all the virtual
Me@22 409 * processors have dissipated.. a.s.o. )
Me@22 410 *
Me@22 411 *The semantic layer is responsible for making sure all work has fully
Me@22 412 * completed before using this to shutdown the VMS system.
Me@22 413 *
Me@22 414 *After the semantic layer has determined it wants to shut down, the
Me@22 415 * next time the Master Loop calls the scheduler plug-in, the scheduler
Me@22 416 * then calls this function and returns the virtual processor it gets back.
Me@22 417 *
Me@22 418 *When the shut-down processor runs, it first frees all locations malloc'd to
Me@22 419 * the VMS system (that wasn't
Me@22 420 * specified as return-locations). Then it creates one core-loop shut-down
Me@22 421 * processor for each core loop and puts them all into the workQ. When a
Me@22 422 * core loop animates a core loop shut-down processor, it causes exit-thread
Me@22 423 * to run, and when all core loop threads have exited, then the "wait for
Me@22 424 * work to finish" in the main thread is woken, and the function-call that
Me@22 425 * started all the work returns.
Me@22 426 *
Me@22 427 *The function animated by this processor performs the shut-down work.
Me@22 428 */
Me@22 429 VirtProcr *
Me@22 430 VMS__create_the_shutdown_procr()
Me@22 431 {
Me@22 432 return VMS__create_procr( &shutdownFn, NULL );
Me@22 433 }
Me@22 434
Me@22 435
Me@24 436 /*This must be called by the request handler plugin -- it cannot be called
Me@24 437 * from the semantic library "dissipate processor" function -- instead, the
Me@24 438 * semantic layer has to generate a request for the plug-in to call this
Me@24 439 * function.
Me@24 440 *The reason is that this frees the virtual processor's stack -- which is
Me@24 441 * still in use inside semantic library calls!
Me@24 442 *
Me@24 443 *This frees or recycles all the state owned by and comprising the VMS
Me@24 444 * portion of the animating virtual procr. The request handler must first
Me@24 445 * free any semantic data created for the processor that didn't use the
Me@24 446 * VMS_malloc mechanism. Then it calls this, which first asks the malloc
Me@24 447 * system to disown any state that did use VMS_malloc, and then frees the
Me@24 448 * statck and the processor-struct itself.
Me@24 449 *If the dissipated processor is the sole (remaining) owner of VMS__malloc'd
Me@24 450 * state, then that state gets freed (or sent to recycling) as a side-effect
Me@24 451 * of dis-owning it.
Me@24 452 */
Me@24 453 void
Me@24 454 VMS__free_procr_locs( VirtProcr *animatingPr )
Me@24 455 {
Me@24 456 //dis-own all locations owned by this processor, causing to be freed
Me@24 457 // any locations that it is (was) sole owner of
Me@24 458 //TODO: implement VMS__malloc system, including "give up ownership"
Me@24 459
Me@24 460 //The dissipate request might still be attached, so remove and free it
Me@24 461 VMS__remove_and_free_top_request( animatingPr );
Me@24 462 free( animatingPr->startOfStack );
Me@24 463
Me@24 464 //NOTE: initialData was given to the processor, so should either have
Me@24 465 // been alloc'd with VMS__malloc, or freed by the level above animPr.
Me@24 466 //So, all that's left to free here is the stack and the VirtProcr struc
Me@24 467 // itself
Me@24 468 free( animatingPr->startOfStack );
Me@24 469 free( animatingPr );
Me@24 470 }
Me@24 471
Me@24 472
Me@24 473
Me@22 474 /*This is the function run by the special "shut-down" processor
Me@22 475 *
Me@22 476 *The _VMSMasterEnv is needed by this shut down function, so the "wait"
Me@22 477 * function run in the main loop has to free it, and the thread-related
Me@22 478 * locations (coreLoopThdParams a.s.o.).
Me@22 479 *However, the semantic environment and all data malloc'd to VMS can be
Me@22 480 * freed here.
Me@22 481 *
Me@22 482 *NOTE: the semantic plug-in is expected to use VMS__malloc to get all the
Me@22 483 * locations it needs -- they will be automatically freed by the standard
Me@22 484 * "free all owned locations"
Me@22 485 *
Me@22 486 *Free any locations malloc'd to the VMS system (that weren't
Me@22 487 * specified as return-locations).
Me@22 488 *Then create one core-loop shut-down processor for each core loop and puts
Me@22 489 * them all into the workQ.
Me@22 490 */
Me@22 491 void
Me@22 492 shutdownFn( void *dummy, VirtProcr *animatingPr )
Me@8 493 { int coreIdx;
Me@14 494 VirtProcr *shutDownPr;
Me@22 495 CASQueueStruc *workQ = _VMSWorkQ;
Me@22 496
Me@22 497 //free all the locations owned within the VMS system
Me@22 498 //TODO: write VMS__malloc and free.. -- take the DKU malloc as starting pt
Me@22 499
Me@22 500 //make the core loop shut-down processors and put them into the workQ
Me@8 501 for( coreIdx=0; coreIdx < NUM_CORES; coreIdx++ )
Me@8 502 {
Me@14 503 shutDownPr = VMS__create_procr( NULL, NULL );
Me@14 504 shutDownPr->nextInstrPt = _VMSMasterEnv->coreLoopShutDownPt;
Me@22 505 writeCASQ( shutDownPr, workQ );
Me@8 506 }
Me@22 507
Me@22 508 //This is an issue: the animating processor of this function may not
Me@22 509 // get its request handled before all the cores have shutdown.
Me@22 510 //TODO: after all the threads stop, clean out the MasterEnv, the
Me@22 511 // SemanticEnv, and the workQ before returning.
Me@24 512 VMS__dissipate_procr( animatingPr ); //will never come back from this
Me@12 513 }
Me@12 514
Me@12 515
Me@24 516 /*This has to free anything allocated during VMS_init, and any other alloc'd
Me@24 517 * locations that might be left over.
Me@24 518 */
Me@24 519 void
Me@24 520 VMS__shutdown()
Me@24 521 { int i;
Me@24 522
Me@24 523 free( _VMSWorkQ );
Me@24 524 free( _VMSMasterEnv->filledSlots );
Me@24 525 for( i = 0; i < NUM_SCHED_SLOTS; i++ )
Me@24 526 {
Me@24 527 free( _VMSMasterEnv->schedSlots[i] );
Me@24 528 }
Me@24 529
Me@24 530 free( _VMSMasterEnv->schedSlots);
Me@24 531 VMS__free_procr_locs( _VMSMasterEnv->masterVirtPr );
Me@24 532
Me@24 533 free( _VMSMasterEnv );
Me@24 534 }
Me@24 535
Me@24 536
Me@24 537 //===========================================================================
Me@12 538
Me@12 539 inline TSCount getTSCount()
Me@12 540 { unsigned int low, high;
Me@12 541 TSCount out;
Me@12 542
Me@12 543 saveTimeStampCountInto( low, high );
Me@12 544 out = high;
Me@12 545 out = (out << 32) + low;
Me@12 546 return out;
Me@12 547 }
Me@12 548