Mercurial > cgi-bin > hgwebdir.cgi > VMS > VMS_Implementations > SSR_impls > SSR__MC_shared_impl
view SSR.c @ 67:b5b5323b4177
added debugging stuff
| author | Some Random Person <seanhalle@yahoo.com> |
|---|---|
| date | Fri, 16 Mar 2012 23:41:31 -0700 |
| parents | bd5ab695145c |
| children | 81a0f076b12e |
line source
1 /*
2 * Copyright 2010 OpenSourceCodeStewardshipFoundation
3 *
4 * Licensed under BSD
5 */
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <malloc.h>
11 #include "Queue_impl/PrivateQueue.h"
12 #include "Hash_impl/PrivateHash.h"
14 #include "SSR.h"
15 #include "SSR_Counter_Recording.h"
17 //==========================================================================
19 void
20 SSR__init();
22 void
23 SSR__init_Helper();
24 //==========================================================================
27 /*TODO: Q: dealing with library f()s and DKU vs WT vs FoR
28 * (still want to do FoR, with time-lines as syntax, could be super cool)
29 * A: thinking pin the coreCtlrs for all of BLIS -- let Master arbitrate
30 * among library, DKU, WT, FoR -- all the patterns in terms of virtual
31 * processors (or equivalently work-units), so Master picks which virt procr
32 * from which portions of app (DKU, WT, FoR) onto which anim slots
33 *Might even do hierarchy of masters -- group of anim slots for each core
34 * has its own master, that keeps generated work local
35 * single-reader-single-writer sync everywhere -- no atomic primitives
36 * Might have the different assigners talk to each other, to negotiate
37 * larger-grain sharing of resources, according to predicted critical
38 * path, and expansion of work
39 */
43 //===========================================================================
46 /*These are the library functions *called in the application*
47 *
48 *There's a pattern for the outside sequential code to interact with the
49 * VMS_HW code.
50 *The VMS_HW system is inside a boundary.. every SSR system is in its
51 * own directory that contains the functions for each of the processor types.
52 * One of the processor types is the "seed" processor that starts the
53 * cascade of creating all the processors that do the work.
54 *So, in the directory is a file called "EntryPoint.c" that contains the
55 * function, named appropriately to the work performed, that the outside
56 * sequential code calls. This function follows a pattern:
57 *1) it calls SSR__init()
58 *2) it creates the initial data for the seed processor, which is passed
59 * in to the function
60 *3) it creates the seed SSR processor, with the data to start it with.
61 *4) it calls startSSRThenWaitUntilWorkDone
62 *5) it gets the returnValue from the transfer struc and returns that
63 * from the function
64 *
65 *For now, a new SSR system has to be created via SSR__init every
66 * time an entry point function is called -- later, might add letting the
67 * SSR system be created once, and let all the entry points just reuse
68 * it -- want to be as simple as possible now, and see by using what makes
69 * sense for later..
70 */
74 //===========================================================================
76 /*This is the "border crossing" function -- the thing that crosses from the
77 * outside world, into the VMS_HW world. It initializes and starts up the
78 * VMS system, then creates one processor from the specified function and
79 * puts it into the readyQ. From that point, that one function is resp.
80 * for creating all the other processors, that then create others, and so
81 * forth.
82 *When all the processors, including the seed, have dissipated, then this
83 * function returns. The results will have been written by side-effect via
84 * pointers read from, or written into initData.
85 *
86 *NOTE: no Threads should exist in the outside program that might touch
87 * any of the data reachable from initData passed in to here
88 */
89 void
90 SSR__create_seed_procr_and_do_work( TopLevelFnPtr fnPtr, void *initData )
91 { SSRSemEnv *semEnv;
92 SlaveVP *seedPr;
94 SSR__init(); //normal multi-thd
96 semEnv = _VMSMasterEnv->semanticEnv;
98 //SSR starts with one processor, which is put into initial environ,
99 // and which then calls create() to create more, thereby expanding work
100 seedPr = SSR__create_procr_helper( fnPtr, initData,
101 semEnv, semEnv->nextCoreToGetNewPr++ );
103 resume_slaveVP( seedPr, semEnv );
105 VMS_SS__start_the_work_then_wait_until_done(); //normal multi-thd
107 SSR__cleanup_after_shutdown();
108 }
111 int32
112 SSR__giveMinWorkUnitCycles( float32 percentOverhead )
113 {
114 return MIN_WORK_UNIT_CYCLES;
115 }
117 int32
118 SSR__giveIdealNumWorkUnits()
119 {
120 return NUM_SCHED_SLOTS * NUM_CORES;
121 }
123 int32
124 SSR__give_number_of_cores_to_schedule_onto()
125 {
126 return NUM_CORES;
127 }
129 /*For now, use TSC -- later, make these two macros with assembly that first
130 * saves jump point, and second jumps back several times to get reliable time
131 */
132 void
133 SSR__start_primitive()
134 { saveLowTimeStampCountInto( ((SSRSemEnv *)(_VMSMasterEnv->semanticEnv))->
135 primitiveStartTime );
136 }
138 /*Just quick and dirty for now -- make reliable later
139 * will want this to jump back several times -- to be sure cache is warm
140 * because don't want comm time included in calc-time measurement -- and
141 * also to throw out any "weird" values due to OS interrupt or TSC rollover
142 */
143 int32
144 SSR__end_primitive_and_give_cycles()
145 { int32 endTime, startTime;
146 //TODO: fix by repeating time-measurement
147 saveLowTimeStampCountInto( endTime );
148 startTime =((SSRSemEnv*)(_VMSMasterEnv->semanticEnv))->primitiveStartTime;
149 return (endTime - startTime);
150 }
152 //===========================================================================
154 /*Initializes all the data-structures for a SSR system -- but doesn't
155 * start it running yet!
156 *
157 *This runs in the main thread -- before VMS starts up
158 *
159 *This sets up the semantic layer over the VMS system
160 *
161 *First, calls VMS_Setup, then creates own environment, making it ready
162 * for creating the seed processor and then starting the work.
163 */
164 void
165 SSR__init()
166 {
167 VMS_SS__init();
168 //masterEnv, a global var, now is partially set up by init_VMS
169 // after this, have VMS_int__malloc and VMS_int__free available
171 SSR__init_Helper();
172 }
175 void idle_fn(void* data, SlaveVP *animatingSlv){
176 while(1){
177 VMS_int__suspend_slaveVP_and_send_req(animatingSlv);
178 }
179 }
181 void
182 SSR__init_Helper()
183 { SSRSemEnv *semanticEnv;
184 PrivQueueStruc **readyVPQs;
185 int coreIdx, i, j;
187 //Hook up the semantic layer's plug-ins to the Master virt procr
188 _VMSMasterEnv->requestHandler = &SSR__Request_Handler;
189 _VMSMasterEnv->slaveAssigner = &SSR__assign_slaveVP_to_slot;
190 #ifdef HOLISTIC__TURN_ON_PERF_COUNTERS
191 _VMSMasterEnv->counterHandler = &SSR__counter_handler;
192 #endif
194 //create the semantic layer's environment (all its data) and add to
195 // the master environment
196 semanticEnv = VMS_int__malloc( sizeof( SSRSemEnv ) );
197 _VMSMasterEnv->semanticEnv = semanticEnv;
199 #ifdef HOLISTIC__TURN_ON_PERF_COUNTERS
200 SSR__init_counter_data_structs();
201 #endif
202 for(i=0;i<NUM_CORES;++i){
203 for(j=0;j<NUM_SCHED_SLOTS;++j){
204 semanticEnv->idlePr[i][j] = VMS_int__create_slaveVP(&idle_fn,NULL);
205 semanticEnv->idlePr[i][j]->coreAnimatedBy = i;
206 }
207 }
209 #ifdef HOLISTIC__TURN_ON_OBSERVE_UCC
210 semanticEnv->unitList = makeListOfArrays(sizeof(Unit),128);
211 semanticEnv->ctlDependenciesList = makeListOfArrays(sizeof(Dependency),128);
212 semanticEnv->commDependenciesList = makeListOfArrays(sizeof(Dependency),128);
213 semanticEnv->dynDependenciesList = makeListOfArrays(sizeof(Dependency),128);
214 semanticEnv->ntonGroupsInfo = makePrivDynArrayOfSize((void***)&(semanticEnv->ntonGroups),8);
216 semanticEnv->hwArcs = makeListOfArrays(sizeof(Dependency),128);
217 memset(semanticEnv->last_in_slot,0,sizeof(NUM_CORES * NUM_SCHED_SLOTS * sizeof(Unit)));
218 #endif
220 //create the ready queue, hash tables used for pairing send to receive
221 // and so forth
222 //TODO: add hash tables for pairing sends with receives, and
223 // initialize the data ownership system
224 readyVPQs = VMS_int__malloc( NUM_CORES * sizeof(PrivQueueStruc *) );
226 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
227 {
228 readyVPQs[ coreIdx ] = makeVMSQ();
229 }
231 semanticEnv->readyVPQs = readyVPQs;
233 semanticEnv->nextCoreToGetNewPr = 0;
234 semanticEnv->numSlaveVP = 0;
236 semanticEnv->commHashTbl = makeHashTable( 1<<16, &VMS_int__free );//start big
238 //TODO: bug -- turn these arrays into dyn arrays to eliminate limit
239 //semanticEnv->singletonHasBeenExecutedFlags = makeDynArrayInfo( );
240 //semanticEnv->transactionStrucs = makeDynArrayInfo( );
241 for( i = 0; i < NUM_STRUCS_IN_SEM_ENV; i++ )
242 {
243 semanticEnv->fnSingletons[i].endInstrAddr = NULL;
244 semanticEnv->fnSingletons[i].hasBeenStarted = FALSE;
245 semanticEnv->fnSingletons[i].hasFinished = FALSE;
246 semanticEnv->fnSingletons[i].waitQ = makeVMSQ();
247 semanticEnv->transactionStrucs[i].waitingVPQ = makeVMSQ();
248 }
249 }
252 /*Frees any memory allocated by SSR__init() then calls VMS_int__shutdown
253 */
254 void
255 SSR__cleanup_after_shutdown()
256 { SSRSemEnv *semanticEnv;
258 semanticEnv = _VMSMasterEnv->semanticEnv;
260 #ifdef HOLISTIC__TURN_ON_OBSERVE_UCC
261 //UCC
262 FILE* output;
263 int n;
264 char filename[255];
265 for(n=0;n<255;n++)
266 {
267 sprintf(filename, "./counters/UCC.%d",n);
268 output = fopen(filename,"r");
269 if(output)
270 {
271 fclose(output);
272 }else{
273 break;
274 }
275 }
276 if(n<255){
277 printf("Saving UCC to File: %s ...\n", filename);
278 output = fopen(filename,"w+");
279 if(output!=NULL){
280 set_dependency_file(output);
281 //fprintf(output,"digraph Dependencies {\n");
282 //set_dot_file(output);
283 //FIXME: first line still depends on counters being enabled, replace w/ unit struct!
284 //forAllInDynArrayDo(_VMSMasterEnv->counter_history_array_info, &print_dot_node_info );
285 forAllInListOfArraysDo(semanticEnv->unitList, &print_unit_to_file);
286 forAllInListOfArraysDo( semanticEnv->commDependenciesList, &print_comm_dependency_to_file );
287 forAllInListOfArraysDo( semanticEnv->ctlDependenciesList, &print_ctl_dependency_to_file );
288 forAllInDynArrayDo(semanticEnv->ntonGroupsInfo,&print_nton_to_file);
289 //fprintf(output,"}\n");
290 fflush(output);
292 } else
293 printf("Opening UCC file failed. Please check that folder \"counters\" exists in run directory and has write permission.\n");
294 } else {
295 printf("Could not open UCC file, please clean \"counters\" folder. (Must contain less than 255 files.)\n");
296 }
297 //Loop Graph
298 for(n=0;n<255;n++)
299 {
300 sprintf(filename, "./counters/LoopGraph.%d",n);
301 output = fopen(filename,"r");
302 if(output)
303 {
304 fclose(output);
305 }else{
306 break;
307 }
308 }
309 if(n<255){
310 printf("Saving LoopGraph to File: %s ...\n", filename);
311 output = fopen(filename,"w+");
312 if(output!=NULL){
313 set_dependency_file(output);
314 //fprintf(output,"digraph Dependencies {\n");
315 //set_dot_file(output);
316 //FIXME: first line still depends on counters being enabled, replace w/ unit struct!
317 //forAllInDynArrayDo(_VMSMasterEnv->counter_history_array_info, &print_dot_node_info );
318 forAllInListOfArraysDo( semanticEnv->unitList, &print_unit_to_file );
319 forAllInListOfArraysDo( semanticEnv->commDependenciesList, &print_comm_dependency_to_file );
320 forAllInListOfArraysDo( semanticEnv->ctlDependenciesList, &print_ctl_dependency_to_file );
321 forAllInListOfArraysDo( semanticEnv->dynDependenciesList, &print_dyn_dependency_to_file );
322 forAllInListOfArraysDo( semanticEnv->hwArcs, &print_hw_dependency_to_file );
323 //fprintf(output,"}\n");
324 fflush(output);
326 } else
327 printf("Opening LoopGraph file failed. Please check that folder \"counters\" exists in run directory and has write permission.\n");
328 } else {
329 printf("Could not open LoopGraph file, please clean \"counters\" folder. (Must contain less than 255 files.)\n");
330 }
333 freeListOfArrays(semanticEnv->unitList);
334 freeListOfArrays(semanticEnv->commDependenciesList);
335 freeListOfArrays(semanticEnv->ctlDependenciesList);
336 freeListOfArrays(semanticEnv->dynDependenciesList);
338 #endif
339 #ifdef HOLISTIC__TURN_ON_PERF_COUNTERS
340 for(n=0;n<255;n++)
341 {
342 sprintf(filename, "./counters/Counters.%d.csv",n);
343 output = fopen(filename,"r");
344 if(output)
345 {
346 fclose(output);
347 }else{
348 break;
349 }
350 }
351 if(n<255){
352 printf("Saving Counter measurements to File: %s ...\n", filename);
353 output = fopen(filename,"w+");
354 if(output!=NULL){
355 set_counter_file(output);
356 int i;
357 for(i=0;i<NUM_CORES;i++){
358 forAllInListOfArraysDo( semanticEnv->counterList[i], &print_counter_events_to_file );
359 fflush(output);
360 }
362 } else
363 printf("Opening UCC file failed. Please check that folder \"counters\" exists in run directory and has write permission.\n");
364 } else {
365 printf("Could not open UCC file, please clean \"counters\" folder. (Must contain less than 255 files.)\n");
366 }
368 #endif
369 /* It's all allocated inside VMS's big chunk -- that's about to be freed, so
370 * nothing to do here
373 for( coreIdx = 0; coreIdx < NUM_CORES; coreIdx++ )
374 {
375 VMS_int__free( semanticEnv->readyVPQs[coreIdx]->startOfData );
376 VMS_int__free( semanticEnv->readyVPQs[coreIdx] );
377 }
378 VMS_int__free( semanticEnv->readyVPQs );
380 freeHashTable( semanticEnv->commHashTbl );
381 VMS_int__free( _VMSMasterEnv->semanticEnv );
382 */
383 VMS_SS__cleanup_at_end_of_shutdown();
384 }
387 //===========================================================================
389 /*
390 */
391 SlaveVP *
392 SSR__create_procr_with( TopLevelFnPtr fnPtr, void *initData,
393 SlaveVP *creatingPr )
394 { SSRSemReq reqData;
396 //the semantic request data is on the stack and disappears when this
397 // call returns -- it's guaranteed to remain in the VP's stack for as
398 // long as the VP is suspended.
399 reqData.reqType = 0; //know type because in a VMS create req
400 reqData.coreToAssignOnto = -1; //means round-robin assign
401 reqData.fnPtr = fnPtr;
402 reqData.initData = initData;
403 reqData.sendPr = creatingPr;
405 VMS_WL__send_create_slaveVP_req( &reqData, creatingPr );
407 return creatingPr->dataRetFromReq;
408 }
410 SlaveVP *
411 SSR__create_procr_with_affinity( TopLevelFnPtr fnPtr, void *initData,
412 SlaveVP *creatingPr, int32 coreToAssignOnto )
413 { SSRSemReq reqData;
415 //the semantic request data is on the stack and disappears when this
416 // call returns -- it's guaranteed to remain in the VP's stack for as
417 // long as the VP is suspended.
418 reqData.reqType = 0; //know type because in a VMS create req
419 reqData.coreToAssignOnto = coreToAssignOnto;
420 reqData.fnPtr = fnPtr;
421 reqData.initData = initData;
422 reqData.sendPr = creatingPr;
424 VMS_WL__send_create_slaveVP_req( &reqData, creatingPr );
426 return creatingPr->dataRetFromReq;
427 }
430 void
431 SSR__dissipate_procr( SlaveVP *procrToDissipate )
432 {
433 VMS_WL__send_dissipate_req( procrToDissipate );
434 }
437 //===========================================================================
439 void *
440 SSR__malloc_to( int32 sizeToMalloc, SlaveVP *owningPr )
441 { SSRSemReq reqData;
443 reqData.reqType = malloc_req;
444 reqData.sendPr = owningPr;
445 reqData.sizeToMalloc = sizeToMalloc;
447 VMS_WL__send_sem_request( &reqData, owningPr );
449 return owningPr->dataRetFromReq;
450 }
453 /*Sends request to Master, which does the work of freeing
454 */
455 void
456 SSR__free( void *ptrToFree, SlaveVP *owningPr )
457 { SSRSemReq reqData;
459 reqData.reqType = free_req;
460 reqData.sendPr = owningPr;
461 reqData.ptrToFree = ptrToFree;
463 VMS_WL__send_sem_request( &reqData, owningPr );
464 }
467 void
468 SSR__transfer_ownership_of_from_to( void *data, SlaveVP *oldOwnerSlv,
469 SlaveVP *newOwnerPr )
470 {
471 //TODO: put in the ownership system that automatically frees when no
472 // owners of data left -- will need keeper for keeping data around when
473 // future created processors might need it but don't exist yet
474 }
477 void
478 SSR__add_ownership_by_to( SlaveVP *newOwnerSlv, void *data )
479 {
481 }
484 void
485 SSR__remove_ownership_by_from( SlaveVP *loserSlv, void *dataLosing )
486 {
488 }
491 /*Causes the SSR system to remove internal ownership, so data won't be
492 * freed when SSR shuts down, and will persist in the external program.
493 *
494 *Must be called from the processor that currently owns the data.
495 *
496 *IMPL: Transferring ownership touches two different virtual processor's
497 * state -- which means it has to be done carefully -- the VMS rules for
498 * semantic layers say that a work-unit is only allowed to touch the
499 * virtual processor it is part of, and that only a single work-unit per
500 * virtual processor be assigned to a slave at a time. So, this has to
501 * modify the virtual processor that owns the work-unit that called this
502 * function, then create a request to have the other processor modified.
503 *However, in this case, the TO processor is the outside, and transfers
504 * are only allowed to be called by the giver-upper, so can mark caller of
505 * this function as no longer owner, and return -- done.
506 */
507 void
508 SSR__transfer_ownership_to_outside( void *data )
509 {
510 //TODO: removeAllOwnersFrom( data );
511 }
514 //===========================================================================
516 void
517 SSR__send_of_type_to( SlaveVP *sendPr, void *msg, const int type,
518 SlaveVP *receivePr)
519 { SSRSemReq reqData;
521 reqData.receivePr = receivePr;
522 reqData.sendPr = sendPr;
523 reqData.reqType = send_type;
524 reqData.msgType = type;
525 reqData.msg = msg;
526 reqData.nextReqInHashEntry = NULL;
528 //On ownership -- remove inside the send and let ownership sit in limbo
529 // as a potential in an entry in the hash table, when this receive msg
530 // gets paired to a send, the ownership gets added to the receivePr --
531 // the next work-unit in the receivePr's trace will have ownership.
532 VMS_WL__send_sem_request( &reqData, sendPr );
534 //When come back from suspend, no longer own data reachable from msg
535 //TODO: release ownership here
536 }
538 void
539 SSR__send_from_to( void *msg, SlaveVP *sendPr, SlaveVP *receivePr )
540 { SSRSemReq reqData;
542 //hash on the receiver, 'cause always know it, but sometimes want to
543 // receive from anonymous sender
545 reqData.receivePr = receivePr;
546 reqData.sendPr = sendPr;
547 reqData.reqType = send_from_to;
548 reqData.msg = msg;
549 reqData.nextReqInHashEntry = NULL;
551 VMS_WL__send_sem_request( &reqData, sendPr );
552 }
555 //===========================================================================
557 void *
558 SSR__receive_any_to( SlaveVP *receivePr )
559 {
561 }
563 void *
564 SSR__receive_type_to( const int type, SlaveVP *receivePr )
565 { DEBUG__printf1(dbgRqstHdlr,"WL: receive type to: %d", receivePr->slaveID);
566 SSRSemReq reqData;
568 reqData.receivePr = receivePr;
569 reqData.reqType = receive_type;
570 reqData.msgType = type;
571 reqData.nextReqInHashEntry = NULL;
573 VMS_WL__send_sem_request( &reqData, receivePr );
575 return receivePr->dataRetFromReq;
576 }
580 /*Call this at point receiving virt pr wants in-coming data.
581 *
582 *The reason receivePr must call this is that it modifies the receivPr
583 * loc structure directly -- and the VMS rules state a virtual processor
584 * loc structure can only be modified by itself.
585 */
586 void *
587 SSR__receive_from_to( SlaveVP *sendPr, SlaveVP *receivePr )
588 { DEBUG__printf2(dbgRqstHdlr,"WL: receive from %d to: %d", sendPr->slaveID, receivePr->slaveID);
589 SSRSemReq reqData;
591 //hash on the receiver, 'cause always know it, but sometimes want to
592 // receive from anonymous sender
594 reqData.receivePr = receivePr;
595 reqData.sendPr = sendPr;
596 reqData.reqType = receive_from_to;
597 reqData.nextReqInHashEntry = NULL;
599 VMS_WL__send_sem_request( &reqData, receivePr );
601 return receivePr->dataRetFromReq;
602 }
605 //===========================================================================
606 //
607 /*A function singleton is a function whose body executes exactly once, on a
608 * single core, no matter how many times the fuction is called and no
609 * matter how many cores or the timing of cores calling it.
610 *
611 *A data singleton is a ticket attached to data. That ticket can be used
612 * to get the data through the function exactly once, no matter how many
613 * times the data is given to the function, and no matter the timing of
614 * trying to get the data through from different cores.
615 */
617 /*asm function declarations*/
618 void asm_save_ret_to_singleton(SSRSingleton *singletonPtrAddr);
619 void asm_write_ret_from_singleton(SSRSingleton *singletonPtrAddr);
621 /*Fn singleton uses ID as index into array of singleton structs held in the
622 * semantic environment.
623 */
624 void
625 SSR__start_fn_singleton( int32 singletonID, SlaveVP *animPr )
626 {
627 SSRSemReq reqData;
629 //
630 reqData.reqType = singleton_fn_start;
631 reqData.singletonID = singletonID;
633 VMS_WL__send_sem_request( &reqData, animPr );
634 if( animPr->dataRetFromReq ) //will be 0 or addr of label in end singleton
635 {
636 SSRSemEnv *semEnv = VMS_int__give_sem_env_for( animPr );
637 asm_write_ret_from_singleton(&(semEnv->fnSingletons[ singletonID]));
638 }
639 }
641 /*Data singleton hands addr of loc holding a pointer to a singleton struct.
642 * The start_data_singleton makes the structure and puts its addr into the
643 * location.
644 */
645 void
646 SSR__start_data_singleton( SSRSingleton **singletonAddr, SlaveVP *animPr )
647 {
648 SSRSemReq reqData;
650 if( *singletonAddr && (*singletonAddr)->hasFinished )
651 goto JmpToEndSingleton;
653 reqData.reqType = singleton_data_start;
654 reqData.singletonPtrAddr = singletonAddr;
656 VMS_WL__send_sem_request( &reqData, animPr );
657 if( animPr->dataRetFromReq ) //either 0 or end singleton's return addr
658 { //Assembly code changes the return addr on the stack to the one
659 // saved into the singleton by the end-singleton-fn
660 //The return addr is at 0x4(%%ebp)
661 JmpToEndSingleton:
662 asm_write_ret_from_singleton(*singletonAddr);
663 }
664 //now, simply return
665 //will exit either from the start singleton call or the end-singleton call
666 }
668 /*Uses ID as index into array of flags. If flag already set, resumes from
669 * end-label. Else, sets flag and resumes normally.
670 *
671 *Note, this call cannot be inlined because the instr addr at the label
672 * inside is shared by all invocations of a given singleton ID.
673 */
674 void
675 SSR__end_fn_singleton( int32 singletonID, SlaveVP *animPr )
676 {
677 SSRSemReq reqData;
679 //don't need this addr until after at least one singleton has reached
680 // this function
681 SSRSemEnv *semEnv = VMS_int__give_sem_env_for( animPr );
682 asm_write_ret_from_singleton(&(semEnv->fnSingletons[ singletonID]));
684 reqData.reqType = singleton_fn_end;
685 reqData.singletonID = singletonID;
687 VMS_WL__send_sem_request( &reqData, animPr );
689 EndSingletonInstrAddr:
690 return;
691 }
693 void
694 SSR__end_data_singleton( SSRSingleton **singletonPtrAddr, SlaveVP *animPr )
695 {
696 SSRSemReq reqData;
698 //don't need this addr until after singleton struct has reached
699 // this function for first time
700 //do assembly that saves the return addr of this fn call into the
701 // data singleton -- that data-singleton can only be given to exactly
702 // one instance in the code of this function. However, can use this
703 // function in different places for different data-singletons.
704 // (*(singletonAddr))->endInstrAddr = &&EndDataSingletonInstrAddr;
707 asm_save_ret_to_singleton(*singletonPtrAddr);
709 reqData.reqType = singleton_data_end;
710 reqData.singletonPtrAddr = singletonPtrAddr;
712 VMS_WL__send_sem_request( &reqData, animPr );
713 }
715 /*This executes the function in the masterVP, so it executes in isolation
716 * from any other copies -- only one copy of the function can ever execute
717 * at a time.
718 *
719 *It suspends to the master, and the request handler takes the function
720 * pointer out of the request and calls it, then resumes the VP.
721 *Only very short functions should be called this way -- for longer-running
722 * isolation, use transaction-start and transaction-end, which run the code
723 * between as work-code.
724 */
725 void
726 SSR__animate_short_fn_in_isolation( PtrToAtomicFn ptrToFnToExecInMaster,
727 void *data, SlaveVP *animPr )
728 {
729 SSRSemReq reqData;
731 //
732 reqData.reqType = atomic;
733 reqData.fnToExecInMaster = ptrToFnToExecInMaster;
734 reqData.dataForFn = data;
736 VMS_WL__send_sem_request( &reqData, animPr );
737 }
740 /*This suspends to the master.
741 *First, it looks at the VP's data, to see the highest transactionID that VP
742 * already has entered. If the current ID is not larger, it throws an
743 * exception stating a bug in the code. Otherwise it puts the current ID
744 * there, and adds the ID to a linked list of IDs entered -- the list is
745 * used to check that exits are properly ordered.
746 *Next it is uses transactionID as index into an array of transaction
747 * structures.
748 *If the "VP_currently_executing" field is non-null, then put requesting VP
749 * into queue in the struct. (At some point a holder will request
750 * end-transaction, which will take this VP from the queue and resume it.)
751 *If NULL, then write requesting into the field and resume.
752 */
753 void
754 SSR__start_transaction( int32 transactionID, SlaveVP *animPr )
755 {
756 SSRSemReq reqData;
758 //
759 reqData.sendPr = animPr;
760 reqData.reqType = trans_start;
761 reqData.transID = transactionID;
763 VMS_WL__send_sem_request( &reqData, animPr );
764 }
766 /*This suspends to the master, then uses transactionID as index into an
767 * array of transaction structures.
768 *It looks at VP_currently_executing to be sure it's same as requesting VP.
769 * If different, throws an exception, stating there's a bug in the code.
770 *Next it looks at the queue in the structure.
771 *If it's empty, it sets VP_currently_executing field to NULL and resumes.
772 *If something in, gets it, sets VP_currently_executing to that VP, then
773 * resumes both.
774 */
775 void
776 SSR__end_transaction( int32 transactionID, SlaveVP *animPr )
777 {
778 SSRSemReq reqData;
780 //
781 reqData.sendPr = animPr;
782 reqData.reqType = trans_end;
783 reqData.transID = transactionID;
785 VMS_WL__send_sem_request( &reqData, animPr );
786 }