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annotate AnimationMaster.c @ 288:c7142d15fc40

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Switched order of lock release inside PR_SS end process normally
author Sean Halle <seanhalle@yahoo.com>
date Thu, 05 Sep 2013 18:05:11 -0700
parents 2fc69e6c14ea
children 744b5ff9851e
rev   line source
seanhalle@230 1 /*
seanhalle@270 2 * Copyright 2012 OpenSourceResearchInstitute.org
seanhalle@230 3 *
seanhalle@230 4 * Licensed under BSD
seanhalle@230 5 */
seanhalle@230 6
seanhalle@230 7
seanhalle@230 8
seanhalle@230 9 #include <stdio.h>
seanhalle@230 10 #include <stddef.h>
seanhalle@230 11
seanhalle@260 12 #include "PR.h"
seanhalle@230 13
seanhalle@273 14 //========================= Local Declarations ========================
seanhalle@273 15 inline PRProcess *
seanhalle@273 16 pickAProcess( AnimSlot *slot );
seanhalle@273 17 inline bool32
seanhalle@273 18 assignWork( PRProcess *process, AnimSlot *slot );
seanhalle@230 19
seanhalle@273 20 inline void
seanhalle@273 21 PRHandle__CreateTask( PRReqst *req, SlaveVP *slave );
seanhalle@273 22 inline void
seanhalle@273 23 PRHandle__EndTask( PRReqst *req, SlaveVP *slave );
seanhalle@273 24 inline void
seanhalle@273 25 PRHandle__CreateSlave(PRReqst *req, SlaveVP *slave );
seanhalle@273 26 inline void
seanhalle@273 27 PRHandle__EndSlave( PRReqst *req, SlaveVP *slave );
seanhalle@268 28
seanhalle@273 29 inline void
seanhalle@273 30 PRHandle__LangShutdown( PRReqst *req, SlaveVP *requestingSlv );
seanhalle@268 31
seanhalle@273 32 inline void
seanhalle@273 33 handleMakeProbe( PRServiceReq *langReq, PRLangEnv *protoLangEnv );
seanhalle@273 34 inline void
seanhalle@273 35 handleThrowException( PRServiceReq *langReq, PRLangEnv *protoLangEnv );
seanhalle@230 36
seanhalle@273 37 //===========================================================================
seanhalle@272 38
seanhalle@272 39 /*Note: there used to be a coreController that was another animation
seanhalle@272 40 * layer below both the masterVP and the slaveVPs.. in that case, the
seanhalle@272 41 * masterVP was a virtual processor whose processor-state was the same
seanhalle@272 42 * as a slaveVP's processor sate, both implemented as a SlaveVP struct.
seanhalle@272 43 * Have removed that, and
seanhalle@272 44 * changed the masterVP implementation. Instead of being a special version
seanhalle@272 45 * of a proto-runtime virtual processor, using the slaveVP stuct, the
seanhalle@272 46 * Master "virtual processor" is now implemented as a pthread pinned to
seanhalle@272 47 * a physical core.
seanhalle@260 48 */
seanhalle@260 49
seanhalle@272 50 /*This is the behavior of the Master. The physical processor switches
seanhalle@272 51 * between animating the master, and animating a slave. When a slave
seanhalle@272 52 * suspends, the PR "suspend" primitive switches the physical core over
seanhalle@272 53 * to animating the masterVP, which is implemented as a pinned pthread.
seanhalle@272 54 * This function is the behavior of that masterVP.
seanhalle@272 55 *This function's job is to manage processing
seanhalle@272 56 * requests and to trigger assignment of new work to the physical core,
seanhalle@272 57 * and to manage sharing the core among processes.
seanhalle@272 58 */
seanhalle@261 59 inline
seanhalle@270 60 bool32
seanhalle@269 61 masterFunction( AnimSlot *slot )
seanhalle@261 62 { //Scan the animation slots
seanhalle@261 63 int32 magicNumber;
seanhalle@261 64 SlaveVP *slave;
seanhalle@268 65 PRLangEnv *langEnv;
seanhalle@261 66 PRReqst *req;
seanhalle@268 67 PRProcess *process;
seanhalle@273 68 bool32 didAssignWork;
seanhalle@260 69
seanhalle@268 70 //Check if newly-done slave in slot, which will need request handled
seanhalle@272 71 //NOTE: left over from when had a coreController & MasterVP managed
seanhalle@272 72 // several slots
seanhalle@268 73 if( slot->workIsDone )
seanhalle@268 74 { slot->workIsDone = FALSE;
seanhalle@268 75 slot->needsWorkAssigned = TRUE;
seanhalle@287 76 //printf("top handle request: %d | reqType: %d\n", slot->coreSlotIsOn, (int32)req->reqType );fflush(stdin);
seanhalle@273 77
seanhalle@273 78 //An Idle VP has no request to handle, so skip to assign..
seanhalle@278 79 if( slot->slaveAssignedToSlot->typeOfVP != IdleVP &&
seanhalle@278 80 slot->slaveAssignedToSlot->typeOfVP != ShutdownVP)
seanhalle@273 81 {
seanhalle@273 82 HOLISTIC__Record_AppResponder_start; //TODO: update to check which process for each slot
seanhalle@273 83 MEAS__startReqHdlr;
seanhalle@261 84
seanhalle@261 85
seanhalle@273 86 //process the request made by the slave (held inside slave struc)
seanhalle@273 87 slave = slot->slaveAssignedToSlot;
seanhalle@273 88 req = slave->request;
seanhalle@268 89
seanhalle@273 90 //If the requesting slave is a slot slave, and request is not
seanhalle@273 91 // task-end, then turn it into a free task slave & continue
seanhalle@273 92 if( slave->typeOfVP == SlotTaskSlv && req->reqType != TaskEnd )
seanhalle@273 93 PR_int__replace_with_new_slot_slv( slave );
seanhalle@268 94
seanhalle@273 95 //Handle task create and end first -- they're special cases..
seanhalle@273 96 switch( req->reqType )
seanhalle@278 97 {
seanhalle@278 98 case TaskEnd:
seanhalle@273 99 { //do PR handler, which calls lang's hdlr and does recycle of
seanhalle@273 100 // free task slave if needed -- PR handler checks for free task Slv
seanhalle@273 101 PRHandle__EndTask( req, slave ); break;
seanhalle@273 102 }
seanhalle@273 103 case TaskCreate:
seanhalle@273 104 { //Do PR's create-task handler, which calls the lang's hdlr
seanhalle@273 105 // PR handler checks for free task Slv
seanhalle@273 106 PRHandle__CreateTask( req, slave ); break;
seanhalle@273 107 }
seanhalle@273 108 case SlvCreate: PRHandle__CreateSlave( req, slave ); break;
seanhalle@273 109 case SlvDissipate: PRHandle__EndSlave( req, slave ); break;
seanhalle@273 110 case Service: PRHandle__ServiceReq( slave ); break; //resumes into Service lang env
seanhalle@273 111 case Hardware: //for future expansion
seanhalle@273 112 case IO: //for future expansion
seanhalle@273 113 case OSCall: //for future expansion
seanhalle@273 114 PR_int__throw_exception("Not implemented", slave, NULL); break;
seanhalle@273 115 case LangShutdown: PRHandle__LangShutdown( req, slave ); break;
seanhalle@273 116 case Language: //normal lang request
seanhalle@273 117 { magicNumber = req->langMagicNumber;
seanhalle@273 118 langEnv = PR_PI__give_lang_env_for_slave( slave, magicNumber );
seanhalle@273 119 (*req->handler)( req->langReq, slave, langEnv );
seanhalle@273 120 }
seanhalle@267 121 }
seanhalle@273 122
seanhalle@268 123 MEAS__endReqHdlr;
seanhalle@267 124 HOLISTIC__Record_AppResponder_end;
seanhalle@273 125 }//if not idleVP
seanhalle@278 126 else if( slot->slaveAssignedToSlot->typeOfVP == ShutdownVP )
seanhalle@278 127 { //ShutdownVP used, essentially, as a flag, to cause terminate here
seanhalle@278 128 PR_int__release_master_lock();
seanhalle@278 129 terminateCoreCtlr( slot->slaveAssignedToSlot );
seanhalle@278 130 }
seanhalle@268 131 } //if have request to be handled
seanhalle@268 132
seanhalle@272 133 //NOTE: IF statement is leftover from when master managed many slots
seanhalle@273 134 didAssignWork = FALSE;
seanhalle@273 135 if( slot->needsWorkAssigned ) //can probably remove IF, now that only one slot
seanhalle@268 136 {
seanhalle@268 137 HOLISTIC__Record_Assigner_start;
seanhalle@272 138
seanhalle@268 139 //Pick a process to get this slot
seanhalle@268 140 process = pickAProcess( slot );
seanhalle@268 141
seanhalle@268 142 //Scan lang environs, looking for langEnv with ready work.
seanhalle@268 143 // call the Assigner for that lang Env, to get a slave for the slot
seanhalle@273 144 if( process != NULL )
seanhalle@273 145 { didAssignWork =
seanhalle@273 146 assignWork( process, slot );
seanhalle@273 147 }
seanhalle@268 148 HOLISTIC__Record_Assigner_end;
seanhalle@272 149
seanhalle@273 150 if( !didAssignWork ) //if no work assigned, be sure idle slave is in slot
seanhalle@273 151 { slot->slaveAssignedToSlot = _PRTopEnv->idleSlv[slot->coreSlotIsOn][0];
seanhalle@273 152 }
seanhalle@273 153 // fixme; //make into a loop that tries more processes if fails to assign
seanhalle@268 154 }//if slot needs slave assigned
seanhalle@270 155
seanhalle@273 156 return didAssignWork;
seanhalle@261 157 }
seanhalle@260 158
seanhalle@268 159 /*When several processes exist, use some pattern for picking one to give
seanhalle@268 160 * the animation slot to.
seanhalle@268 161 *First, it has to be a process that has work available.
seanhalle@268 162 *For now, just do a round-robin
seanhalle@261 163 */
seanhalle@268 164 inline
seanhalle@268 165 PRProcess *
seanhalle@268 166 pickAProcess( AnimSlot *slot )
seanhalle@268 167 { int32 idx;
seanhalle@268 168 PRProcess *process;
seanhalle@268 169
seanhalle@268 170 for( idx = _PRTopEnv->currProcessIdx; idx < _PRTopEnv->numProcesses; idx++)
seanhalle@268 171 {
seanhalle@268 172 process = _PRTopEnv->processes[ idx ];
seanhalle@268 173 if( process->numEnvsWithWork != 0 )
seanhalle@268 174 { _PRTopEnv->currProcessIdx = idx;
seanhalle@268 175 return process;
seanhalle@268 176 }
seanhalle@261 177 }
seanhalle@268 178 for( idx = 0; idx < _PRTopEnv->currProcessIdx; idx++)
seanhalle@268 179 {
seanhalle@268 180 process = _PRTopEnv->processes[ idx ];
seanhalle@268 181 if( process->numEnvsWithWork != 0 )
seanhalle@268 182 { _PRTopEnv->currProcessIdx = idx;
seanhalle@268 183 return process;
seanhalle@268 184 }
seanhalle@268 185 }
seanhalle@268 186 //none found
seanhalle@268 187 return NULL;
seanhalle@260 188 }
seanhalle@260 189
seanhalle@261 190 /*This does:
seanhalle@268 191 * 1) searches the language environments for one with work ready
seanhalle@261 192 * if finds one, asks its assigner to return work
seanhalle@261 193 * 2) checks what kind of work: new task, resuming task, resuming slave
seanhalle@261 194 * if new task, gets the slot slave and assigns task to it and returns slave
seanhalle@261 195 * else, gets the slave attached to the metaTask and returns that.
seanhalle@261 196 * 3) if no work found, then prune former task slaves waiting to be recycled.
seanhalle@261 197 * If no work and no slaves to prune, check for shutdown conditions.
seanhalle@261 198 *
seanhalle@268 199 * language env keeps its own work in its own structures, and has its own
seanhalle@261 200 * assigner. It chooses
seanhalle@261 201 * However, include a switch that switches-in an override assigner, which
seanhalle@268 202 * sees all the work in all the language env's. This is most likely
seanhalle@261 203 * generated by static tools and included in the executable. That means it
seanhalle@261 204 * has to be called via a registered pointer from here. The idea is that
seanhalle@261 205 * the static tools know which languages are grouped together.. and the
seanhalle@261 206 * override enables them to generate a custom assigner that uses info from
seanhalle@261 207 * all the languages in a unified way.. Don't really expect this to happen,
seanhalle@261 208 * but am making it possible.
seanhalle@260 209 */
seanhalle@268 210 inline
seanhalle@270 211 bool32
seanhalle@261 212 assignWork( PRProcess *process, AnimSlot *slot )
seanhalle@272 213 { int32 coreNum;
seanhalle@260 214
seanhalle@261 215 coreNum = slot->coreSlotIsOn;
seanhalle@260 216
seanhalle@267 217 if( process->overrideAssigner != NULL )
seanhalle@268 218 { if( process->numEnvsWithWork != 0 )
seanhalle@268 219 { (*process->overrideAssigner)( process, slot ); //calls PR fn that inserts work into slot
seanhalle@268 220 goto ReturnAfterAssigningWork; //quit for-loop, cause found work
seanhalle@261 221 }
seanhalle@268 222 else
seanhalle@261 223 goto NoWork;
seanhalle@261 224 }
seanhalle@261 225
seanhalle@268 226 //If here, then no override assigner, so search language envs for work
seanhalle@273 227 int32 envIdx, numEnvs; PRLangEnv **protoLangEnvsList, *protoLangEnv;
seanhalle@273 228 protoLangEnvsList = process->protoLangEnvsList;
seanhalle@268 229 numEnvs = process->numLangEnvs;
seanhalle@268 230 for( envIdx = 0; envIdx < numEnvs; envIdx++ ) //keep langEnvs in hash & array
seanhalle@273 231 { protoLangEnv = protoLangEnvsList[envIdx];
seanhalle@273 232 if( protoLangEnv->numReadyWork > 0 )
seanhalle@272 233 { bool32
seanhalle@272 234 didAssignWork =
seanhalle@273 235 (*protoLangEnv->workAssigner)( PR_int__give_lang_env(protoLangEnv), slot ); //assigner calls PR to put slave/task into slot
seanhalle@272 236
seanhalle@272 237 if(didAssignWork)
seanhalle@273 238 { protoLangEnv->numReadyWork -= 1;
seanhalle@273 239 if( protoLangEnv->numReadyWork == 0 )
seanhalle@272 240 { process->numEnvsWithWork -= 1;
seanhalle@272 241 }
seanhalle@272 242 goto ReturnAfterAssigningWork; //quit for-loop, 'cause found work
seanhalle@272 243 }
seanhalle@272 244 else
seanhalle@272 245 goto NoWork; //quit for-loop, cause found work
seanhalle@272 246
seanhalle@268 247 //NOTE: bad search alg -- should start where left off, then wrap around
seanhalle@260 248 }
seanhalle@260 249 }
seanhalle@268 250 //If reach here, then have searched all langEnv's & none have work..
seanhalle@260 251
seanhalle@268 252 NoWork: //No work, if end up here..
seanhalle@260 253 {
seanhalle@260 254 #ifdef HOLISTIC__TURN_ON_OBSERVE_UCC
seanhalle@272 255 returnSlv = process->idleSlv[coreNum][0]; //only one slot now, so [0]
seanhalle@260 256
seanhalle@260 257 //things that would normally happen in resume(), but idle VPs
seanhalle@260 258 // never go there
seanhalle@261 259 returnSlv->numTimesAssignedToASlot++; //gives each idle unit a unique ID
seanhalle@260 260 Unit newU;
seanhalle@268 261 newU.vp = returnSlv->slaveNum;
seanhalle@261 262 newU.task = returnSlv->numTimesAssignedToASlot;
seanhalle@261 263 addToListOfArrays(Unit,newU,process->unitList);
seanhalle@260 264
seanhalle@261 265 if (returnSlv->numTimesAssignedToASlot > 1) //make a dependency from prev idle unit
seanhalle@260 266 { Dependency newD; // to this one
seanhalle@268 267 newD.from_vp = returnSlv->slaveNum;
seanhalle@261 268 newD.from_task = returnSlv->numTimesAssignedToASlot - 1;
seanhalle@268 269 newD.to_vp = returnSlv->slaveNum;
seanhalle@261 270 newD.to_task = returnSlv->numTimesAssignedToASlot;
seanhalle@261 271 addToListOfArrays(Dependency, newD ,process->ctlDependenciesList);
seanhalle@260 272 }
seanhalle@268 273 #endif
seanhalle@268 274 HOLISTIC__Record_Assigner_end;
seanhalle@269 275 return FALSE;
seanhalle@260 276 }
seanhalle@268 277
seanhalle@268 278 ReturnAfterAssigningWork: //All paths goto here.. to provide single point for holistic..
seanhalle@268 279 {
seanhalle@268 280 HOLISTIC__Record_Assigner_end;
seanhalle@269 281 return TRUE;
seanhalle@260 282 }
seanhalle@260 283 }
seanhalle@260 284
seanhalle@260 285
seanhalle@273 286 //=================================
seanhalle@273 287 //===
seanhalle@273 288 //=
seanhalle@273 289 /*Create task is a special form, that has PR behavior in addition to plugin
seanhalle@273 290 * behavior. Master calls this first, and it then calls the plugin's
seanhalle@273 291 * create task handler.
seanhalle@273 292 *
seanhalle@273 293 *Note: the requesting slave must be either generic slave or free task slave
seanhalle@273 294 */
seanhalle@273 295 inline
seanhalle@273 296 void
seanhalle@273 297 PRHandle__CreateTask( PRReqst *req, SlaveVP *slave )
seanhalle@273 298 { PRMetaTask *protoMetaTask;
seanhalle@273 299 PRProcess *process;
seanhalle@273 300 PRLangEnv *protoLangEnv;
seanhalle@273 301 void *task;
seanhalle@273 302
seanhalle@273 303 process = slave->processSlaveIsIn;
seanhalle@273 304
seanhalle@273 305 protoLangEnv = PR_int__give_proto_lang_env_for_slave( slave,
seanhalle@273 306 req->langMagicNumber );
seanhalle@273 307
seanhalle@273 308 //Do the langlet's create-task handler, which keeps the task
seanhalle@273 309 // inside the langlet's lang env, but returns the langMetaTask
seanhalle@273 310 // so that PR can then put stuff into the prolog
seanhalle@273 311 //typedef void * (*CreateHandler)( void *, SlaveVP *, void * ); //req, slv, langEnv
seanhalle@273 312 //
seanhalle@273 313 task =
seanhalle@273 314 (*req->createHdlr)(req->langReq, slave, PR_int__give_lang_env(protoLangEnv) );
seanhalle@273 315 protoMetaTask = PR_int__give_prolog_of_lang_meta_task( task );
seanhalle@273 316 protoMetaTask->ID = req->ID; //may be NULL
seanhalle@273 317 protoMetaTask->topLevelFn = req->topLevelFn;
seanhalle@273 318 protoMetaTask->initData = req->initData;
seanhalle@273 319 protoMetaTask->processTaskIsIn = process;
seanhalle@273 320
seanhalle@273 321 process->numLiveTasks += 1;
seanhalle@273 322 protoLangEnv->numLiveWork += 1; //used in wait statements -- small added overhead
seanhalle@273 323
seanhalle@273 324 return;
seanhalle@273 325 }
seanhalle@273 326
seanhalle@273 327 /*When a task ends, have two scenarios: 1) task ran to completion, or 2) task
seanhalle@273 328 * has been suspended at some point in its code.
seanhalle@273 329 *For 1, just decr count of live tasks (and check for end condition) -- the
seanhalle@273 330 * master loop will decide what goes into the slot freed up by this task end,
seanhalle@273 331 * so, here, don't worry about assigning a new task to the slot slave.
seanhalle@273 332 *For 2, the task's slot slave has been converted to a free task slave, which
seanhalle@273 333 * now has nothing more to do, so send it to the recycle Q (which includes
seanhalle@273 334 * freeing all the langData and meta task structs alloc'd for it). Then
seanhalle@273 335 * decrement the live task count and check end condition.
seanhalle@273 336 *
seanhalle@273 337 *PR has to update count of live tasks, and check end of process condition.
seanhalle@273 338 * The "main" can invoke constructs that wait for a process to end, so when
seanhalle@273 339 * end detected, have to resume what's waiting..
seanhalle@273 340 *Thing is, that wait involves the main OS thread. That means
seanhalle@273 341 * PR internals have to do OS thread signaling. Want to do that in the
seanhalle@273 342 * core controller, which has the original stack of an OS thread. So the
seanhalle@273 343 * end process handling happens in the core controller.
seanhalle@273 344 *
seanhalle@273 345 *So here, when detect process end, signal to the core controller, which will
seanhalle@273 346 * then do the condition variable notify to the OS thread that's waiting.
seanhalle@273 347 *
seanhalle@273 348 *Note: slave may be either a slot slave or a free task slave.
seanhalle@273 349 */
seanhalle@273 350 inline
seanhalle@273 351 void
seanhalle@273 352 PRHandle__EndTask( PRReqst *req, SlaveVP *requestingSlv )
seanhalle@273 353 { void *langEnv;
seanhalle@273 354 PRLangEnv *protoLangEnv;
seanhalle@273 355 PRProcess *process;
seanhalle@273 356 void *langMetaTask;
seanhalle@273 357
seanhalle@273 358 process = requestingSlv->processSlaveIsIn;
seanhalle@273 359 langEnv = PR_int__give_lang_env_of_req( req, requestingSlv ); //magic num in req
seanhalle@273 360 protoLangEnv = PR_int__give_proto_lang_env( langEnv );
seanhalle@273 361
seanhalle@273 362 langMetaTask = PR_int__give_lang_meta_task_from_slave( requestingSlv, req->langMagicNumber);
seanhalle@273 363
seanhalle@273 364 //Do the langlet's request handler
seanhalle@273 365 //Want to keep PR structs hidden from plugin, so extract langReq..
seanhalle@273 366 //This is supposed to free any langlet-malloc'd mem, including meta task
seanhalle@273 367 (*req->handler)( req->langReq, requestingSlv, langEnv );
seanhalle@273 368
seanhalle@273 369 protoLangEnv->numLiveWork -= 1; //used in wait statements -- small added overhead
seanhalle@273 370 if( protoLangEnv->numLiveWork == 0 &&
seanhalle@273 371 numInPrivQ( protoLangEnv->waitingForWorkToEndQ ) > 0 )
seanhalle@273 372 { SlaveVP *
seanhalle@273 373 waitingSlave = readPrivQ( protoLangEnv->waitingForWorkToEndQ );
seanhalle@273 374 //can't resume into langlet that just ended its last work!
seanhalle@273 375 // and don't have env that the waiter was created in, so resume
seanhalle@273 376 // into PRServ env..
seanhalle@273 377 void *
seanhalle@273 378 resumeEnv = PR_PI__give_lang_env_from_process( process, PRServ_MAGIC_NUMBER );
seanhalle@273 379 while( waitingSlave != NULL )
seanhalle@273 380 { //resume a slave that was waiting for work in this env to finish
seanhalle@273 381 PR_PI__make_slave_ready( waitingSlave, resumeEnv );
seanhalle@273 382 //get next waiting slave, repeat..
seanhalle@273 383 waitingSlave = readPrivQ( protoLangEnv->waitingForWorkToEndQ );
seanhalle@273 384 }
seanhalle@273 385 }
seanhalle@273 386
seanhalle@273 387
seanhalle@273 388 //Now that the langlet's done with it, recycle the slave if it's a freeTaskSlv
seanhalle@273 389 if( requestingSlv->typeOfVP == FreeTaskSlv )
seanhalle@273 390 PR_int__recycle_slaveVP( requestingSlv ); //Doesn't decr num live slaves
seanhalle@273 391
seanhalle@273 392 process->numLiveTasks -= 1;
seanhalle@273 393 //NOTE: end-task is unrelated to work available (just in case wondering)
seanhalle@273 394
seanhalle@273 395 //check End Of Process Condition
seanhalle@273 396 if( process->numLiveTasks == 0 &&
seanhalle@273 397 process->numLiveGenericSlvs == 0 )
seanhalle@273 398 { //Tell the core controller to do wakeup of any waiting OS thread
seanhalle@273 399 PR_SS__end_process_normally( process );
seanhalle@273 400 }
seanhalle@273 401 }
seanhalle@273 402
seanhalle@273 403
seanhalle@268 404
seanhalle@268 405 /*This is first thing called when creating a slave.. it hands off to the
seanhalle@268 406 * langlet's creator, then adds updates of its own..
seanhalle@268 407 *
seanhalle@268 408 *There's a question of things like lang data, meta tasks, and such..
seanhalle@268 409 *In creator, only PR related things happen, and things for the langlet whose
seanhalle@261 410 * creator construct was used.
seanhalle@268 411 *
seanhalle@268 412 *Other langlets still get a chance to create langData -- but by registering a
seanhalle@268 413 * "createLangData" handler in the langEnv. When a construct of the langlet
seanhalle@268 414 * calls "PR__give_lang_data()", if there is no langData for that langlet,
seanhalle@268 415 * the PR will call the creator in the langlet's langEnv, place whatever it
seanhalle@268 416 * makes as the langData in that slave for that langlet, and return that langData
seanhalle@261 417 *
seanhalle@261 418 *So, as far as counting things, a langlet is only allowed to count creation
seanhalle@261 419 * of slaves it creates itself.. may have to change this later.. add a way for
seanhalle@261 420 * langlet to register a trigger Fn called each time a slave gets created..
seanhalle@261 421 * need more experience with what langlets will do at create time.. think Cilk
seanhalle@261 422 * has interesting create behavior.. not sure how that will differ in light
seanhalle@261 423 * of true tasks and langlet approach. Look at it after all done and start
seanhalle@261 424 * modifying the langs to be langlets..
seanhalle@261 425 *
seanhalle@261 426 *PR itself needs to create the slave, then update numLiveSlaves in process,
seanhalle@261 427 * copy processID from requestor to newly created
seanhalle@261 428 */
seanhalle@268 429 inline
seanhalle@268 430 void
seanhalle@272 431 PRHandle__CreateSlave( PRReqst *req, SlaveVP *slave )
seanhalle@268 432 { SlaveVP *newSlv;
seanhalle@261 433 PRProcess *process;
seanhalle@268 434 PRLangEnv *protoLangEnv;
seanhalle@261 435
seanhalle@268 436 process = slave->processSlaveIsIn;
seanhalle@273 437 protoLangEnv = PR_int__give_proto_lang_env_for_slave( slave, req->langMagicNumber );
seanhalle@272 438
seanhalle@272 439 //create handler, or a future request handler will call PR_PI__make_slave_ready
seanhalle@272 440 // which will in turn handle updating which langlets and which processes have
seanhalle@272 441 // work available.
seanhalle@272 442 //NOTE: create slv has diff prototype than standard reqst hdlr
seanhalle@268 443 newSlv =
seanhalle@268 444 (*req->createHdlr)(req->langReq, slave, PR_int__give_lang_env(protoLangEnv));
seanhalle@268 445
seanhalle@261 446 newSlv->typeOfVP = GenericSlv;
seanhalle@261 447 newSlv->processSlaveIsIn = process;
seanhalle@268 448 newSlv->ID = req->ID;
seanhalle@272 449 process->numLiveGenericSlvs += 1; //not same as work ready!
seanhalle@273 450 protoLangEnv->numLiveWork += 1; //used in wait statements -- small added overhead
seanhalle@260 451 }
seanhalle@260 452
seanhalle@268 453 /*The dissipate handler has to, update the number of slaves of the type, within
seanhalle@261 454 * the process, and call the langlet handler linked into the request,
seanhalle@261 455 * and after that returns, then call the PR function that frees the slave state
seanhalle@261 456 * (or recycles the slave).
seanhalle@261 457 *
seanhalle@261 458 *The PR function that frees the slave state has to also free all of the
seanhalle@268 459 * langData in the slave.. or else reset all of the langDatas.. by, say, marking
seanhalle@268 460 * them, then in PR__give_langData( magicNum ) call the langlet registered
seanhalle@268 461 * "resetLangData" Fn.
seanhalle@261 462 */
seanhalle@268 463 inline
seanhalle@268 464 void
seanhalle@272 465 PRHandle__EndSlave( PRReqst *req, SlaveVP *slave )
seanhalle@261 466 { PRProcess *process;
seanhalle@268 467 PRLangEnv *protoLangEnv;
seanhalle@261 468
seanhalle@261 469 process = slave->processSlaveIsIn;
seanhalle@261 470
seanhalle@261 471 //do the language's dissipate handler
seanhalle@273 472 protoLangEnv = PR_int__give_proto_lang_env_for_slave( slave, slave->request->langMagicNumber );
seanhalle@268 473
seanhalle@268 474 if(req->handler != NULL)
seanhalle@268 475 (*req->handler)( req->langReq, slave, PR_int__give_lang_env(protoLangEnv) );
seanhalle@261 476
seanhalle@273 477 protoLangEnv->numLiveWork -= 1; //used in wait statements -- small added overhead
seanhalle@273 478 if( protoLangEnv->numLiveWork == 0 &&
seanhalle@273 479 numInPrivQ( protoLangEnv->waitingForWorkToEndQ ) > 0 )
seanhalle@273 480 { SlaveVP *
seanhalle@273 481 waitingSlave = readPrivQ( protoLangEnv->waitingForWorkToEndQ );
seanhalle@273 482 //can't resume into langlet that just ended its last work!
seanhalle@273 483 // and don't have env that the waiter was created in, so resume
seanhalle@273 484 // into PRServ env..
seanhalle@273 485 void *
seanhalle@273 486 resumeEnv = PR_PI__give_lang_env_from_process( process, PRServ_MAGIC_NUMBER );
seanhalle@273 487 while( waitingSlave != NULL )
seanhalle@273 488 { //resume a slave that was waiting for work in this env to finish
seanhalle@273 489 PR_PI__make_slave_ready( waitingSlave, resumeEnv );
seanhalle@273 490 //get next waiting slave, repeat..
seanhalle@273 491 waitingSlave = readPrivQ( protoLangEnv->waitingForWorkToEndQ );
seanhalle@273 492 }
seanhalle@273 493 }
seanhalle@273 494
seanhalle@272 495 process->numLiveGenericSlvs -= 1;
seanhalle@273 496 PR_int__recycle_slaveVP( slave );
seanhalle@272 497 //NOTE: dissipate is unrelated to work available (just in case wondering)
seanhalle@272 498
seanhalle@261 499 //check End Of Process Condition
seanhalle@261 500 if( process->numLiveTasks == 0 &&
seanhalle@266 501 process->numLiveGenericSlvs == 0 )
seanhalle@273 502 PR_SS__end_process_normally( process );
seanhalle@261 503 }
seanhalle@261 504
seanhalle@273 505 //=======================
seanhalle@273 506 //===
seanhalle@273 507 //=
seanhalle@273 508 /*Langlet shutdown triggers this, which calls the registered shutdown
seanhalle@273 509 * handler for the langlet, and removes the lang's env from the process
seanhalle@261 510 */
seanhalle@268 511 inline
seanhalle@268 512 void
seanhalle@273 513 PRHandle__LangShutdown( PRReqst *req, SlaveVP *requestingSlv )
seanhalle@273 514 { void *langEnv;
seanhalle@273 515 PRLangEnv *protoLangEnv;
seanhalle@273 516 PRProcess *process;
seanhalle@268 517
seanhalle@273 518 process = requestingSlv->processSlaveIsIn;
seanhalle@273 519 protoLangEnv = PR_int__give_proto_lang_env_from_process( process, req->langMagicNumber );
seanhalle@273 520 langEnv = PR_int__give_lang_env( protoLangEnv );
seanhalle@268 521
seanhalle@273 522 //call the langlet's registered handler
seanhalle@273 523 (*protoLangEnv->shutdownHdlr)( langEnv );
seanhalle@267 524
seanhalle@273 525 PR_int__remove_lang_env_from_process_and_free( langEnv ); //removes from process and frees
seanhalle@276 526
seanhalle@276 527 PR_PI__resume_slave_in_PRServ( requestingSlv );
seanhalle@261 528 }
seanhalle@261 529
seanhalle@272 530
seanhalle@272 531 /*This is for OS requests and PR infrastructure requests, which are not
seanhalle@272 532 * part of the PRServ language -- this is for things that have to be in the
seanhalle@272 533 * infrastructure of PR itself, such as I/O requests, which have to go through
seanhalle@272 534 * pthreads inside the core controller..
seanhalle@272 535 *
seanhalle@272 536 *As of Jan 2013, doesn't do much of anything..
seanhalle@272 537 */
seanhalle@272 538 void inline
seanhalle@272 539 PRHandle__ServiceReq( SlaveVP *requestingSlv )
seanhalle@273 540 { PRReqst *req;
seanhalle@273 541 PRServiceReq *langReq;
seanhalle@273 542 PRLangEnv *protoLangEnv;
seanhalle@273 543 int32 magicNumber;
seanhalle@272 544
seanhalle@272 545
seanhalle@272 546 req = requestingSlv->request;
seanhalle@272 547
seanhalle@272 548 magicNumber = req->langMagicNumber;
seanhalle@273 549 protoLangEnv = PR_int__give_proto_lang_env_for_slave( requestingSlv, magicNumber );
seanhalle@272 550
seanhalle@272 551 langReq = PR_PI__take_lang_reqst_from(req);
seanhalle@272 552 if( langReq == NULL ) return;
seanhalle@272 553 switch( langReq->reqType ) //lang handlers are all in other file
seanhalle@272 554 {
seanhalle@273 555 case make_probe: handleMakeProbe( langReq, protoLangEnv );
seanhalle@272 556 break;
seanhalle@273 557 case throw_excp: handleThrowException( langReq, protoLangEnv );
seanhalle@272 558 break;
seanhalle@272 559 }
seanhalle@272 560 }
seanhalle@273 561
seanhalle@273 562
seanhalle@273 563 /*These handlers are special -- they don't belong to a language, because they
seanhalle@273 564 * deal with things internal to PR, so put them here..
seanhalle@273 565 */
seanhalle@273 566 inline
seanhalle@273 567 void
seanhalle@273 568 handleMakeProbe( PRServiceReq *langReq, PRLangEnv *protoLangEnv )
seanhalle@273 569 { IntervalProbe *newProbe;
seanhalle@273 570
seanhalle@273 571 newProbe = PR_int__malloc( sizeof(IntervalProbe) );
seanhalle@273 572 newProbe->nameStr = PR_int__strDup( langReq->nameStr );
seanhalle@273 573 newProbe->hist = NULL;
seanhalle@273 574 newProbe->schedChoiceWasRecorded = FALSE;
seanhalle@273 575
seanhalle@273 576 //This runs in masterVP, so no race-condition worries
seanhalle@273 577 //BUG: move to process
seanhalle@273 578 newProbe->probeID =
seanhalle@273 579 addToDynArray( newProbe, _PRTopEnv->dynIntervalProbesInfo );
seanhalle@273 580
seanhalle@273 581 langReq->requestingSlv->dataRetFromReq = newProbe;
seanhalle@273 582
seanhalle@273 583 (*protoLangEnv->makeSlaveReadyFn)( langReq->requestingSlv, PR_int__give_lang_env(protoLangEnv) );
seanhalle@273 584 }
seanhalle@273 585
seanhalle@273 586 inline
seanhalle@273 587 void
seanhalle@273 588 handleThrowException( PRServiceReq *langReq, PRLangEnv *protoLangEnv )
seanhalle@273 589 {
seanhalle@273 590 PR_int__throw_exception( langReq->msgStr, langReq->requestingSlv, langReq->exceptionData );
seanhalle@273 591
seanhalle@273 592 (*protoLangEnv->makeSlaveReadyFn)( langReq->requestingSlv, PR_int__give_lang_env(protoLangEnv) );
seanhalle@273 593 }
seanhalle@273 594