src/dps8/threadz.c

/* */
This source file includes following definitions.
lock_simh
unlock_simh
lock_libuv
unlock_libuv
test_libuv_lock
get_rmw_lock
lock_rmw
lock_mem_rd
lock_mem_wr
unlock_rmw
unlock_mem
unlock_mem_force
lock_ptr
unlock_ptr
lock_scu
unlock_scu
lock_iom
unlock_iom
lock_tst
unlock_tst
test_tst_lock
pthread_create_with_cpu_policy
createCPUThread
stopCPUThread
cpuRunningWait
sleepCPU
wakeCPU
createIOMThread
iomInterruptWait
iomInterruptDone
iomDoneWait
setIOMInterrupt
iomRdyWait
createChnThread
chnConnectWait
chnConnectDone
setChnConnect
chnRdyWait
initThreadz
setSignals
   1 /*
   2  * vim: filetype=c:tabstop=4:ai:expandtab
   3  * SPDX-License-Identifier: ICU
   4  * scspell-id: fe96c073-f62f-11ec-bf37-80ee73e9b8e7
   5  *
   6  * ---------------------------------------------------------------------------
   7  *
   8  * Copyright (c) 2013-2019 Charles Anthony
   9  * Copyright (c) 2021-2025 The DPS8M Development Team
  10  *
  11  * This software is made available under the terms of the ICU License.
  12  * See the LICENSE.md file at the top-level directory of this distribution.
  13  *
  14  * ---------------------------------------------------------------------------
  15  */
  16 
  17 //
  18 // Thread Wrappers
  19 //
  20 
  21 #include <unistd.h>
  22 #include <stdlib.h>
  23 #include <signal.h>
  24 
  25 #include "dps8.h"
  26 #include "dps8_sys.h"
  27 #include "dps8_cpu.h"
  28 #include "dps8_faults.h"
  29 #include "dps8_iom.h"
  30 #include "dps8_utils.h"
  31 
  32 #include "threadz.h"
  33 #if defined(__FreeBSD__) || defined(__OpenBSD__)
  34 # include <pthread_np.h>
  35 #endif /* FreeBSD || OpenBSD */
  36 
  37 //
  38 // Resource locks
  39 //
  40 
  41 // scp library serializer
  42 
  43 #if defined(IO_ASYNC_PAYLOAD_CHAN_THREAD)
  44 pthread_cond_t iomCond;
  45 pthread_mutex_t iom_start_lock;
  46 #endif
  47 
  48 #if !defined(QUIET_UNUSED)
  49 void lock_simh (void)
     /*  */
  50   {
  51     pthread_mutex_lock (& simh_lock);
  52   }
  53 
  54 void unlock_simh (void)
     /*  */
  55   {
  56     pthread_mutex_unlock (& simh_lock);
  57   }
  58 #endif
  59 
  60 // libuv library serializer
  61 
  62 static pthread_mutex_t libuv_lock;
  63 
  64 void lock_libuv (void)
     /*  */
  65   {
  66     pthread_mutex_lock (& libuv_lock);
  67   }
  68 
  69 void unlock_libuv (void)
     /*  */
  70   {
  71     pthread_mutex_unlock (& libuv_lock);
  72   }
  73 
  74 #if defined(TESTING)
  75 bool test_libuv_lock (void)
     /*  */
  76   {
  77     //sim_debug (DBG_TRACE, & cpu_dev, "test_libuv_lock\n");
  78     int rc;
  79     rc = pthread_mutex_trylock (& libuv_lock);
  80     if (rc)
  81       {
  82          // couldn't lock; presumably already
  83          return true;
  84       }
  85     // lock acquired, it wasn't locked
  86     rc = pthread_mutex_unlock (& libuv_lock);
  87     if (rc)
  88       sim_printf ("test_libuv_lock pthread_mutex_lock libuv_lock %d\n", rc);
  89     return false;
  90   }
  91 #endif
  92 
  93 // Memory serializer
  94 
  95 //   addrmods RMW lock
  96 //     Read()
  97 //     Write()
  98 //
  99 //   CPU -- reset locks
 100 //
 101 //   core_read/core_write locks
 102 //
 103 //   read_operand/write operand RMW lock
 104 //     Read()
 105 //     Write()
 106 //
 107 //  IOM
 108 
 109 // mem_lock -- memory atomicity lock
 110 // rmw_lock -- big R/M/W cycle lock
 111 
 112 #if !defined(LOCKLESS)
 113 pthread_rwlock_t mem_lock = PTHREAD_RWLOCK_INITIALIZER;
 114 static __thread bool have_mem_lock = false;
 115 static __thread bool have_rmw_lock = false;
 116 
 117 bool get_rmw_lock (void)
     /*  */
 118   {
 119     return have_rmw_lock;
 120   }
 121 
 122 void lock_rmw (void)
     /*  */
 123   {
 124     if (have_rmw_lock)
 125       {
 126         sim_warn ("%s: Already have RMW lock\n", __func__);
 127         return;
 128       }
 129     if (have_mem_lock)
 130       {
 131         sim_warn ("%s: Already have memory lock\n", __func__);
 132         return;
 133       }
 134     int rc= pthread_rwlock_wrlock (& mem_lock);
 135     if (rc)
 136       sim_printf ("%s pthread_rwlock_rdlock mem_lock %d\n", __func__, rc);
 137     have_mem_lock = true;
 138     have_rmw_lock = true;
 139   }
 140 
 141 void lock_mem_rd (void)
     /*  */
 142   {
 143     // If the big RMW lock is on, do nothing.
 144     if (have_rmw_lock)
 145       return;
 146 
 147     if (have_mem_lock)
 148       {
 149         sim_warn ("%s: Already have memory lock\n", __func__);
 150         return;
 151       }
 152     int rc= pthread_rwlock_rdlock (& mem_lock);
 153     if (rc)
 154       sim_printf ("%s pthread_rwlock_rdlock mem_lock %d\n", __func__, rc);
 155     have_mem_lock = true;
 156   }
 157 
 158 void lock_mem_wr (void)
     /*  */
 159   {
 160     // If the big RMW lock is on, do nothing.
 161     if (have_rmw_lock)
 162       return;
 163 
 164     if (have_mem_lock)
 165       {
 166         sim_warn ("%s: Already have memory lock\n", __func__);
 167         return;
 168       }
 169     int rc= pthread_rwlock_wrlock (& mem_lock);
 170     if (rc)
 171       sim_printf ("%s pthread_rwlock_wrlock mem_lock %d\n", __func__, rc);
 172     have_mem_lock = true;
 173   }
 174 
 175 void unlock_rmw (void)
     /*  */
 176   {
 177     if (! have_mem_lock)
 178       {
 179         sim_warn ("%s: Don't have memory lock\n", __func__);
 180         return;
 181       }
 182     if (! have_rmw_lock)
 183       {
 184         sim_warn ("%s: Don't have RMW lock\n", __func__);
 185         return;
 186       }
 187 
 188     int rc = pthread_rwlock_unlock (& mem_lock);
 189     if (rc)
 190       sim_printf ("%s pthread_rwlock_ublock mem_lock %d\n", __func__, rc);
 191     have_mem_lock = false;
 192     have_rmw_lock = false;
 193   }
 194 
 195 void unlock_mem (void)
     /*  */
 196   {
 197     if (have_rmw_lock)
 198       return;
 199     if (! have_mem_lock)
 200       {
 201         sim_warn ("%s: Don't have memory lock\n", __func__);
 202         return;
 203       }
 204 
 205     int rc = pthread_rwlock_unlock (& mem_lock);
 206     if (rc)
 207       sim_printf ("%s pthread_rwlock_ublock mem_lock %d\n", __func__, rc);
 208     have_mem_lock = false;
 209   }
 210 
 211 void unlock_mem_force (void)
     /*  */
 212   {
 213     if (have_mem_lock)
 214       {
 215         int rc = pthread_rwlock_unlock (& mem_lock);
 216         if (rc)
 217           sim_printf ("%s pthread_rwlock_unlock mem_lock %d\n", __func__, rc);
 218       }
 219     have_mem_lock = false;
 220     have_rmw_lock = false;
 221   }
 222 #endif
 223 
 224 // local serializer
 225 
 226 void lock_ptr (pthread_mutex_t * lock)
     /*  */
 227   {
 228     int rc;
 229     rc = pthread_mutex_lock (lock);
 230     if (rc)
 231       sim_printf ("lock_ptr %d\n", rc);
 232   }
 233 
 234 void unlock_ptr (pthread_mutex_t * lock)
     /*  */
 235   {
 236     //sim_debug (DBG_TRACE, & cpu_dev, "unlock_scu\n");
 237     int rc;
 238     rc = pthread_mutex_unlock (lock);
 239     if (rc)
 240       sim_printf ("unlock_ptr %d\n", rc);
 241   }
 242 
 243 // SCU serializer
 244 
 245 static pthread_mutex_t scu_lock;
 246 
 247 void lock_scu (void)
     /*  */
 248   {
 249     //sim_debug (DBG_TRACE, & cpu_dev, "lock_scu\n");
 250     int rc;
 251     rc = pthread_mutex_lock (& scu_lock);
 252     if (rc)
 253       sim_printf ("lock_scu pthread_spin_lock scu %d\n", rc);
 254   }
 255 
 256 void unlock_scu (void)
     /*  */
 257   {
 258     //sim_debug (DBG_TRACE, & cpu_dev, "unlock_scu\n");
 259     int rc;
 260     rc = pthread_mutex_unlock (& scu_lock);
 261     if (rc)
 262       sim_printf ("unlock_scu pthread_spin_lock scu %d\n", rc);
 263   }
 264 // synchronous clock serializer
 265 
 266 // static pthread_mutex_t syncLock;
 267 
 268 // void lockSync (void)
 269 //   {
 270 //     int rc;
 271 //     rc = pthread_mutex_lock (& syncLock);
 272 //     if (rc)
 273 //       sim_printf ("lockSync pthread_spin_lock syncLock %d\n", rc);
 274 //   }
 275 
 276 // void unlockSync (void)
 277 //   {
 278 //     int rc;
 279 //     rc = pthread_mutex_unlock (& syncLock);
 280 //     if (rc)
 281 //       sim_printf ("unlockSync pthread_spin_lock syncLock %d\n", rc);
 282 //   }
 283 
 284 // IOM serializer
 285 
 286 static pthread_mutex_t iom_lock;
 287 
 288 void lock_iom (void)
     /*  */
 289   {
 290     int rc;
 291     rc = pthread_mutex_lock (& iom_lock);
 292     if (rc)
 293       sim_printf ("%s pthread_spin_lock iom %d\n", __func__, rc);
 294   }
 295 
 296 void unlock_iom (void)
     /*  */
 297   {
 298     int rc;
 299     rc = pthread_mutex_unlock (& iom_lock);
 300     if (rc)
 301       sim_printf ("%s pthread_spin_lock iom %d\n", __func__, rc);
 302   }
 303 
 304 // Debugging tool
 305 
 306 #if defined(TESTING)
 307 static pthread_mutex_t tst_lock = PTHREAD_MUTEX_INITIALIZER;
 308 
 309 void lock_tst (void)
     /*  */
 310   {
 311     //sim_debug (DBG_TRACE, & cpu_dev, "lock_tst\n");
 312     int rc;
 313     rc = pthread_mutex_lock (& tst_lock);
 314     if (rc)
 315       sim_printf ("lock_tst pthread_mutex_lock tst_lock %d\n", rc);
 316   }
 317 
 318 void unlock_tst (void)
     /*  */
 319   {
 320     //sim_debug (DBG_TRACE, & cpu_dev, "unlock_tst\n");
 321     int rc;
 322     rc = pthread_mutex_unlock (& tst_lock);
 323     if (rc)
 324       sim_printf ("unlock_tst pthread_mutex_lock tst_lock %d\n", rc);
 325   }
 326 
 327 // assertion
 328 
 329 bool test_tst_lock (void)
     /*  */
 330   {
 331     //sim_debug (DBG_TRACE, & cpu_dev, "test_tst_lock\n");
 332     int rc;
 333     rc = pthread_mutex_trylock (& tst_lock);
 334     if (rc)
 335       {
 336          // couldn't lock; presumably already
 337          return true;
 338       }
 339     // lock acquired, it wasn't locked
 340     rc = pthread_mutex_unlock (& tst_lock);
 341     if (rc)
 342       sim_printf ("test_tst_lock pthread_mutex_lock tst_lock %d\n", rc);
 343     return false;
 344   }
 345 #endif /* if defined(TESTING) */
 346 
 347 ////////////////////////////////////////////////////////////////////////////////
 348 //
 349 // CPU threads
 350 //
 351 ////////////////////////////////////////////////////////////////////////////////
 352 
 353 //
 354 // main thread
 355 //   createCPUThread
 356 //
 357 // CPU thread
 358 //   cpuRunningWait
 359 //   sleepCPU
 360 //
 361 // SCU thread
 362 //   wakeCPU
 363 //
 364 // cpuThread:
 365 //
 366 //    while (1)
 367 //      {
 368 //        cpuRunningWait
 369 //        compute...
 370 //        dis:  sleepCPU
 371 //      }
 372 
 373 struct cpuThreadz_t cpuThreadz [N_CPU_UNITS_MAX];
 374 
 375 // Create a thread with Mach CPU policy
 376 
 377 #if defined(__APPLE__)
 378 int pthread_create_with_cpu_policy(
     /*  */
 379         pthread_t *restrict thread,
 380         int policy_group,
 381         const pthread_attr_t *restrict attr,
 382         void *(*start_routine)(void *), void *restrict arg)
 383 {
 384 # if defined(TESTING)
 385   sim_msg ("\rAffinity policy group %d requested for thread.\r\n", policy_group);
 386 # endif /* if defined(TESTING) */
 387   thread_affinity_policy_data_t policy_data = { policy_group };
 388   int rv = pthread_create_suspended_np(thread, attr, start_routine, arg);
 389   mach_port_t mach_thread = pthread_mach_thread_np(*thread);
 390   if (rv != 0)
 391     {
 392       return rv;
 393     }
 394   thread_policy_set(
 395           mach_thread,
 396           THREAD_AFFINITY_POLICY,
 397           (thread_policy_t)&policy_data,
 398           THREAD_AFFINITY_POLICY_COUNT);
 399   thread_resume(mach_thread);
 400   return 0;
 401 }
 402 #endif /* if defined(__APPLE__) */
 403 
 404 // Create CPU thread
 405 
 406 void createCPUThread (uint cpuNum)
     /*  */
 407   {
 408     int rc;
 409     struct cpuThreadz_t * p = & cpuThreadz[cpuNum];
 410     if (p->run)
 411       return;
 412     cpu_reset_unit_idx (cpuNum, false);
 413     p->cpuThreadArg = (int) cpuNum;
 414     // initialize run/stop switch
 415 
 416 #if defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__linux__) && defined(__GLIBC__))
 417     pthread_mutexattr_t sleep_attr;
 418     pthread_mutexattr_init(&sleep_attr);
 419 # if !defined(__OpenBSD__)
 420     pthread_mutexattr_settype(&sleep_attr, PTHREAD_MUTEX_ADAPTIVE_NP);
 421 # endif
 422     rc = pthread_mutex_init (& p->sleepLock, &sleep_attr);
 423 #else
 424     rc = pthread_mutex_init (& p->sleepLock, NULL);
 425 #endif /* FreeBSD || OpenBSD || Linux+GLIBC */
 426     if (rc)
 427       sim_printf ("createCPUThread pthread_mutex_init sleepLock %d\n", rc);
 428 
 429     rc = pthread_mutex_init (& p->runLock, NULL);
 430     if (rc)
 431       sim_printf ("createCPUThread pthread_mutex_init runLock %d\n", rc);
 432 
 433     rc = pthread_cond_init (& p->runCond, NULL);
 434     if (rc)
 435       sim_printf ("createCPUThread pthread_cond_init runCond %d\n", rc);
 436 
 437     p->run = true;
 438     p->sleeping = false;
 439 
 440     // initialize DIS sleep
 441 #if defined(USE_MONOTONIC)
 442 # if defined(__APPLE__) || !defined(CLOCK_MONOTONIC)
 443     p->sleepClock = CLOCK_REALTIME;
 444     rc = pthread_cond_init (& p->sleepCond, NULL);
 445 # else
 446     rc = pthread_condattr_init (& p->sleepCondAttr);
 447     if (rc)
 448       sim_printf ("createCPUThread pthread_condattr_init sleepCond %d\n", rc);
 449 
 450     rc = pthread_condattr_setclock (& p->sleepCondAttr, CLOCK_MONOTONIC);
 451     if (rc) {
 452       //sim_printf ("createCPUThread pthread_condattr_setclock  sleepCond %d\n", rc);
 453       p->sleepClock = CLOCK_REALTIME;
 454     } else {
 455       p->sleepClock = CLOCK_MONOTONIC;
 456     }
 457 # endif // ! APPLE
 458     rc = pthread_cond_init (& p->sleepCond, & p->sleepCondAttr);
 459 #else
 460     rc = pthread_cond_init (& p->sleepCond, NULL);
 461 #endif
 462     if (rc)
 463       sim_printf ("createCPUThread pthread_cond_init sleepCond %d\n", rc);
 464 
 465 #if defined(__APPLE__)
 466     rc = pthread_create_with_cpu_policy(
 467             & p->cpuThread,
 468             cpuNum,
 469             NULL,
 470             cpu_thread_main,
 471             & p->cpuThreadArg);
 472 #else
 473     rc = pthread_create(
 474             & p->cpuThread,
 475             NULL,
 476             cpu_thread_main,
 477             & p->cpuThreadArg);
 478 #endif /* if defined(__APPLE__) */
 479     if (rc)
 480       sim_printf ("createCPUThread pthread_create %d\n", rc);
 481 
 482 #if defined(AFFINITY)
 483     if (cpus[cpuNum].set_affinity)
 484       {
 485         cpu_set_t cpuset;
 486         CPU_ZERO (& cpuset);
 487         CPU_SET (cpus[cpuNum].affinity, & cpuset);
 488         int s = pthread_setaffinity_np (p->cpuThread, sizeof (cpu_set_t), & cpuset);
 489         if (s)
 490           sim_printf ("pthread_setaffinity_np %u on CPU %u returned %d\n",
 491                       cpus[cpuNum].affinity, cpuNum, s);
 492       }
 493 #endif /* if defined(AFFINITY) */
 494   }
 495 
 496 void stopCPUThread(void)
     /*  */
 497   {
 498     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 499     p->run = false;
 500     pthread_exit(NULL);
 501   }
 502 
 503 // Called by CPU thread to block on run/sleep
 504 
 505 #if defined(THREADZ)
 506 void cpuRunningWait (void)
     /*  */
 507   {
 508     int rc;
 509     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 510     if (p->run)
 511       return;
 512     rc = pthread_mutex_lock (& p->runLock);
 513     if (rc)
 514       sim_printf ("cpuRunningWait pthread_mutex_lock %d\n", rc);
 515     while (! p->run)
 516       {
 517         rc = pthread_cond_wait (& p->runCond, & p->runLock);
 518         if (rc)
 519           sim_printf ("cpuRunningWait pthread_cond_wait %d\n", rc);
 520      }
 521     rc = pthread_mutex_unlock (& p->runLock);
 522     if (rc)
 523       sim_printf ("cpuRunningWait pthread_mutex_unlock %d\n", rc);
 524   }
 525 #endif
 526 
 527 // Called by CPU thread to sleep until time up or signaled
 528 // Return time left
 529 unsigned long  sleepCPU (unsigned long usec) {
     /*  */
 530   int rc;
 531   struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 532   struct timespec startTime, absTime;
 533 
 534 #if defined(USE_MONOTONIC)
 535   clock_gettime (p->sleepClock, & startTime);
 536 #else
 537   clock_gettime (CLOCK_REALTIME, & startTime);
 538 #endif /* if defined(USE_MONOTONIC) */
 539   absTime = startTime;
 540   int64_t nsec = ((int64_t) usec) * 1000L + (int64_t)startTime.tv_nsec;
 541   absTime.tv_nsec = nsec % 1000000000L;
 542   absTime.tv_sec += nsec / 1000000000L;
 543 
 544   rc = pthread_mutex_lock (& p->sleepLock);
 545   if (rc)
 546     sim_printf ("sleepCPU pthread_mutex_lock sleepLock %d\n", rc);
 547 
 548   p->sleeping = true;
 549   rc = pthread_cond_timedwait (& p->sleepCond, & p->sleepLock, & absTime);
 550   p->sleeping = false; //-V519
 551 
 552   int rc2 = pthread_mutex_unlock (& p->sleepLock);
 553   if (rc2)
 554     sim_printf ("sleepCPU pthread_mutex_unlock sleepLock %d\n", rc2);
 555 
 556   if (rc == ETIMEDOUT) {
 557     return 0;
 558   }
 559 
 560   if (rc) {
 561     cpu_state_t * cpup = _cpup;
 562     sim_printf ("sleepCPU pthread_cond_timedwait rc %ld  usec %ld TR %lu CPU %lu\n",
 563                 (long) rc, (long) usec, (unsigned long) cpu.rTR,
 564                 (unsigned long) current_running_cpu_idx);
 565   }
 566 
 567   struct timespec newTime;
 568   struct timespec delta;
 569 #if defined(USE_MONOTONIC)
 570   clock_gettime (p->sleepClock, & newTime);
 571 #else
 572   clock_gettime (CLOCK_REALTIME, & newTime);
 573 #endif /* if defined(USE_MONOTONIC) */
 574   timespec_diff (& absTime, & newTime, & delta);
 575 
 576   if (delta.tv_nsec < 0)
 577     return 0; // safety
 578   return (unsigned long) delta.tv_nsec / 1000L;
 579 }
 580 
 581 // Called to wake sleeping CPU; such as interrupt during DIS
 582 
 583 void wakeCPU (uint cpuNum)
     /*  */
 584   {
 585     int rc;
 586     struct cpuThreadz_t * p = & cpuThreadz[cpuNum];
 587 
 588     rc = pthread_mutex_lock (& p->sleepLock);
 589     if (rc)
 590       sim_printf ("sleepCPU pthread_mutex_lock sleepLock %d\n", rc);
 591 
 592     if (p->sleeping) {
 593       rc = pthread_cond_signal (& p->sleepCond);
 594       if (rc)
 595         sim_printf ("wakeCPU pthread_cond_signal %d\n", rc);
 596     }
 597 
 598     int rc2 = pthread_mutex_unlock (& p->sleepLock);
 599     if (rc2)
 600       sim_printf ("sleepCPU pthread_mutex_unlock sleepLock %d\n", rc2);
 601   }
 602 
 603 #if defined(IO_THREADZ)
 604 ////////////////////////////////////////////////////////////////////////////////
 605 //
 606 // IOM threads
 607 //
 608 ////////////////////////////////////////////////////////////////////////////////
 609 
 610 // main thread
 611 //   createIOMThread    create thread
 612 //   iomRdyWait         wait for IOM started
 613 //   setIOMInterrupt    signal IOM to start
 614 //   iomDoneWait        wait for IOM done
 615 // IOM thread
 616 //   iomInterruptWait   IOM thread wait for work
 617 //   iomInterruptDone   IOM thread signal done working
 618 //
 619 //   IOM thread
 620 //     while (1)
 621 //       {
 622 //         iomInterruptWake
 623 //         work...
 624 //         iomInterruptDone
 625 //      }
 626 
 627 struct iomThreadz_t iomThreadz [N_IOM_UNITS_MAX];
 628 
 629 // Create IOM thread
 630 
 631 void createIOMThread (uint iomNum)
     /*  */
 632   {
 633     int rc;
 634     struct iomThreadz_t * p = & iomThreadz[iomNum];
 635 # if defined(tdbg)
 636     p->inCnt = 0;
 637     p->outCnt = 0;
 638 # endif
 639     p->iomThreadArg = (int) iomNum;
 640 
 641     p->ready = false;
 642     // initialize interrupt wait
 643     p->intr = false;
 644     rc = pthread_mutex_init (& p->intrLock, NULL);
 645     if (rc)
 646       sim_printf ("createIOMThread pthread_mutex_init intrLock %d\n", rc);
 647     rc = pthread_cond_init (& p->intrCond, NULL);
 648     if (rc)
 649       sim_printf ("createIOMThread pthread_cond_init intrCond %d\n", rc);
 650 
 651 # if defined(__APPLE__)
 652     rc = pthread_create_with_cpu_policy(
 653             & p->iomThread,
 654             iomNum,
 655             NULL,
 656             iom_thread_main,
 657             & p->iomThreadArg);
 658 # else
 659     rc = pthread_create(
 660             & p->iomThread,
 661             NULL,
 662             iom_thread_main,
 663             & p->iomThreadArg);
 664 # endif /* if defined(__APPLE__) */
 665     if (rc)
 666       sim_printf ("createIOMThread pthread_create %d\n", rc);
 667   }
 668 
 669 // Called by IOM thread to block until CIOC call
 670 
 671 void iomInterruptWait (void)
     /*  */
 672   {
 673     int rc;
 674     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 675     rc = pthread_mutex_lock (& p->intrLock);
 676     if (rc)
 677       sim_printf ("iomInterruptWait pthread_mutex_lock %d\n", rc);
 678     p -> ready = true;
 679     while (! p->intr)
 680       {
 681         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 682         if (rc)
 683           sim_printf ("iomInterruptWait pthread_cond_wait %d\n", rc);
 684       }
 685 # if defined(tdbg)
 686     p->outCnt++;
 687     if (p->inCnt != p->outCnt)
 688       sim_printf ("iom thread %d in %d out %d\n", this_iom_idx,
 689                   p->inCnt, p->outCnt);
 690 # endif
 691   }
 692 
 693 // Called by IOM thread to signal CIOC complete
 694 
 695 void iomInterruptDone (void)
     /*  */
 696   {
 697     int rc;
 698     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 699     p->intr = false;
 700     rc = pthread_cond_signal (& p->intrCond);
 701     if (rc)
 702       sim_printf ("iomInterruptDone pthread_cond_signal %d\n", rc);
 703     rc = pthread_mutex_unlock (& p->intrLock);
 704     if (rc)
 705       sim_printf ("iomInterruptDone pthread_mutex_unlock %d\n", rc);
 706   }
 707 
 708 // Called by CPU thread to wait for iomInterruptDone
 709 
 710 void iomDoneWait (uint iomNum)
     /*  */
 711   {
 712     int rc;
 713     struct iomThreadz_t * p = & iomThreadz[iomNum];
 714     rc = pthread_mutex_lock (& p->intrLock);
 715     if (rc)
 716       sim_printf ("iomDoneWait pthread_mutex_lock %d\n", rc);
 717     while (p->intr)
 718       {
 719         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 720         if (rc)
 721           sim_printf ("iomDoneWait pthread_cond_wait %d\n", rc);
 722       }
 723     rc = pthread_mutex_unlock (& p->intrLock);
 724     if (rc)
 725       sim_printf ("iomDoneWait pthread_mutex_unlock %d\n", rc);
 726   }
 727 
 728 // Signal CIOC to IOM thread
 729 
 730 void setIOMInterrupt (uint iomNum)
     /*  */
 731   {
 732     int rc;
 733     struct iomThreadz_t * p = & iomThreadz[iomNum];
 734     rc = pthread_mutex_lock (& p->intrLock);
 735     if (rc)
 736       sim_printf ("setIOMInterrupt pthread_mutex_lock %d\n", rc);
 737     while (p->intr)
 738       {
 739         rc = pthread_cond_wait(&p->intrCond, &p->intrLock);
 740         if (rc)
 741           sim_printf ("setIOMInterrupt pthread_cond_wait intrLock %d\n", rc);
 742       }
 743 # if defined(tdbg)
 744     p->inCnt++;
 745 # endif
 746     p->intr = true;
 747     rc = pthread_cond_signal (& p->intrCond);
 748     if (rc)
 749       sim_printf ("setIOMInterrupt pthread_cond_signal %d\n", rc);
 750     rc = pthread_mutex_unlock (& p->intrLock);
 751     if (rc)
 752       sim_printf ("setIOMInterrupt pthread_mutex_unlock %d\n", rc);
 753   }
 754 
 755 // Wait for IOM thread to initialize
 756 
 757 void iomRdyWait (uint iomNum)
     /*  */
 758   {
 759     struct iomThreadz_t * p = & iomThreadz[iomNum];
 760     while (! p -> ready)
 761       sim_usleep (10000);
 762    }
 763 
 764 ////////////////////////////////////////////////////////////////////////////////
 765 //
 766 // Channel threads
 767 //
 768 ////////////////////////////////////////////////////////////////////////////////
 769 
 770 // main thread
 771 //   createChnThread    create thread
 772 // IOM thread
 773 //   chnRdyWait         wait for channel started
 774 //   setChnConnect      signal channel to start
 775 // Channel thread
 776 //   chnConnectWait     Channel thread wait for work
 777 //   chnConnectDone     Channel thread signal done working
 778 //
 779 //   IOM thread
 780 //     while (1)
 781 //       {
 782 //         iomInterruptWake
 783 //         work...
 784 //         iomInterruptDone
 785 //      }
 786 struct chnThreadz_t chnThreadz [N_IOM_UNITS_MAX] [MAX_CHANNELS];
 787 
 788 // Create channel thread
 789 
 790 void createChnThread (uint iomNum, uint chnNum, const char * devTypeStr)
     /*  */
 791   {
 792     int rc;
 793     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 794     p->chnThreadArg = (int) (chnNum + iomNum * MAX_CHANNELS);
 795 
 796 # if defined(tdbg)
 797     p->inCnt = 0;
 798     p->outCnt = 0;
 799 # endif
 800     p->ready = false;
 801     // initialize interrupt wait
 802     p->connect = false;
 803     rc = pthread_mutex_init (& p->connectLock, NULL);
 804     if (rc)
 805       sim_printf ("createChnThread pthread_mutex_init connectLock %d\n", rc);
 806     rc = pthread_cond_init (& p->connectCond, NULL);
 807     if (rc)
 808       sim_printf ("createChnThread pthread_cond_init connectCond %d\n", rc);
 809 
 810 # if defined(__APPLE__)
 811     rc = pthread_create_with_cpu_policy(
 812             & p->chnThread,
 813             iomNum
 814             NULL,
 815             chan_thread_main,
 816             & p->chnThreadArg);
 817 # else
 818     rc = pthread_create(
 819             & p->chnThread,
 820             NULL,
 821             chan_thread_main,
 822             & p->chnThreadArg);
 823 # endif /* if defined(__APPLE__) */
 824     if (rc)
 825       sim_printf ("createChnThread pthread_create %d\n", rc);
 826   }
 827 
 828 // Called by channel thread to block until I/O command presented
 829 
 830 void chnConnectWait (void)
     /*  */
 831   {
 832     int rc;
 833     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 834 
 835     rc = pthread_mutex_lock (& p->connectLock);
 836     if (rc)
 837       sim_printf ("chnConnectWait pthread_mutex_lock %d\n", rc);
 838     p -> ready = true;
 839     while (! p->connect)
 840       {
 841         rc = pthread_cond_wait (& p->connectCond, & p->connectLock);
 842         if (rc)
 843           sim_printf ("chnConnectWait pthread_cond_wait %d\n", rc);
 844       }
 845 # if defined(tdbg)
 846     p->outCnt++;
 847     if (p->inCnt != p->outCnt)
 848       sim_printf ("chn thread %d in %d out %d\n", this_chan_num,
 849                   p->inCnt, p->outCnt);
 850 # endif
 851   }
 852 
 853 // Called by channel thread to signal I/O complete
 854 
 855 void chnConnectDone (void)
     /*  */
 856   {
 857     int rc;
 858     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 859     p->connect = false;
 860     rc = pthread_cond_signal (& p->connectCond);
 861     if (rc)
 862       sim_printf ("chnInterruptDone pthread_cond_signal %d\n", rc);
 863     rc = pthread_mutex_unlock (& p->connectLock);
 864     if (rc)
 865       sim_printf ("chnConnectDone pthread_mutex_unlock %d\n", rc);
 866   }
 867 
 868 // Signal I/O presented to channel thread
 869 
 870 void setChnConnect (uint iomNum, uint chnNum)
     /*  */
 871   {
 872     int rc;
 873     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 874     rc = pthread_mutex_lock (& p->connectLock);
 875     if (rc)
 876       sim_printf ("setChnConnect pthread_mutex_lock %d\n", rc);
 877     while (p->connect)
 878       {
 879         rc = pthread_cond_wait(&p->connectCond, &p->connectLock);
 880         if (rc)
 881           sim_printf ("setChnInterrupt pthread_cond_wait connectLock %d\n", rc);
 882       }
 883 # if defined(tdbg)
 884     p->inCnt++;
 885 # endif
 886     p->connect = true;
 887     rc = pthread_cond_signal (& p->connectCond);
 888     if (rc)
 889       sim_printf ("setChnConnect pthread_cond_signal %d\n", rc);
 890     rc = pthread_mutex_unlock (& p->connectLock);
 891     if (rc)
 892       sim_printf ("setChnConnect pthread_mutex_unlock %d\n", rc);
 893   }
 894 
 895 // Block until channel thread ready
 896 
 897 void chnRdyWait (uint iomNum, uint chnNum)
     /*  */
 898   {
 899     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 900     while (! p -> ready)
 901       sim_usleep (10000);
 902    }
 903 #endif
 904 
 905 void initThreadz (void)
     /*  */
 906   {
 907 #if defined(IO_THREADZ)
 908     // chnThreadz is sparse; make sure 'started' is false
 909     (void)memset (chnThreadz, 0, sizeof (chnThreadz));
 910 #endif
 911 
 912 #if !defined(LOCKLESS)
 913     //pthread_rwlock_init (& mem_lock, PTHREAD_PROCESS_PRIVATE);
 914     have_mem_lock = false;
 915     have_rmw_lock = false;
 916 #endif
 917 #if defined(__FreeBSD__) || defined(__OpenBSD__) || (defined(__linux__) && defined(__GLIBC__))
 918     pthread_mutexattr_t scu_attr;
 919     pthread_mutexattr_init(&scu_attr);
 920 # if !defined(__OpenBSD__)
 921     pthread_mutexattr_settype(&scu_attr, PTHREAD_MUTEX_ADAPTIVE_NP);
 922 # endif
 923     pthread_mutex_init (& scu_lock, &scu_attr);
 924 #else
 925     pthread_mutex_init (& scu_lock, NULL);
 926 #endif /* FreeBSD || OpenBSD || Linux+GLIBC */
 927     pthread_mutexattr_t iom_attr;
 928     pthread_mutexattr_init(& iom_attr);
 929     pthread_mutexattr_settype(& iom_attr, PTHREAD_MUTEX_RECURSIVE);
 930 
 931     pthread_mutex_init (& iom_lock, & iom_attr);
 932 
 933     pthread_mutexattr_t libuv_attr;
 934     pthread_mutexattr_init(& libuv_attr);
 935     pthread_mutexattr_settype(& libuv_attr, PTHREAD_MUTEX_RECURSIVE);
 936 
 937     pthread_mutex_init (& libuv_lock, & libuv_attr);
 938 
 939 #if defined(IO_ASYNC_PAYLOAD_CHAN_THREAD)
 940     pthread_cond_init (& iomCond, NULL);
 941     pthread_mutex_init (& iom_start_lock, NULL);
 942 #endif
 943   }
 944 
 945 // Set up per-thread signal handlers
 946 
 947 void int_handler (int signal);
 948 
 949 void setSignals (void)
     /*  */
 950   {
 951 #if !defined(__MINGW64__) && !defined(__MINGW32__)
 952     struct sigaction act;
 953     (void)memset (& act, 0, sizeof (act));
 954     act.sa_handler = int_handler;
 955     act.sa_flags = 0;
 956     sigaction (SIGINT, & act, NULL);
 957     sigaction (SIGTERM, & act, NULL);
 958 #endif /* if !defined(__MINGW64__) && !defined(__MINGW32__) */
 959   }
 960 
 961 
 962 
 963 
 964 
 965 
 966 
 967 
 968 
 969 
 970
/* */
root/src/dps8/threadz.c

DEFINITIONS
