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     rc = pthread_mutex_init (& p->runLock, NULL);
 416     if (rc)
 417       sim_printf ("createCPUThread pthread_mutex_init runLock %d\n", rc);
 418     rc = pthread_cond_init (& p->runCond, NULL);
 419     if (rc)
 420       sim_printf ("createCPUThread pthread_cond_init runCond %d\n", rc);
 421 
 422     p->run = true;
 423 
 424     // initialize DIS sleep
 425 #if defined(USE_MONOTONIC)
 426 # if defined(__APPLE__) || !defined(CLOCK_MONOTONIC)
 427     p->sleepClock = CLOCK_REALTIME;
 428     rc = pthread_cond_init (& p->sleepCond, NULL);
 429 # else
 430     rc = pthread_condattr_init (& p->sleepCondAttr);
 431     if (rc)
 432       sim_printf ("createCPUThread pthread_condattr_init sleepCond %d\n", rc);
 433 
 434     rc = pthread_condattr_setclock (& p->sleepCondAttr, CLOCK_MONOTONIC);
 435     if (rc) {
 436       //sim_printf ("createCPUThread pthread_condattr_setclock  sleepCond %d\n", rc);
 437       p->sleepClock = CLOCK_REALTIME;
 438     } else {
 439       p->sleepClock = CLOCK_MONOTONIC;
 440     }
 441 # endif // ! APPLE
 442     rc = pthread_cond_init (& p->sleepCond, & p->sleepCondAttr);
 443 #else
 444     rc = pthread_cond_init (& p->sleepCond, NULL);
 445 #endif
 446     if (rc)
 447       sim_printf ("createCPUThread pthread_cond_init sleepCond %d\n", rc);
 448 
 449 #if defined(__APPLE__)
 450     rc = pthread_create_with_cpu_policy(
 451             & p->cpuThread,
 452             cpuNum,
 453             NULL,
 454             cpu_thread_main,
 455             & p->cpuThreadArg);
 456 #else
 457     rc = pthread_create(
 458             & p->cpuThread,
 459             NULL,
 460             cpu_thread_main,
 461             & p->cpuThreadArg);
 462 #endif /* if defined(__APPLE__) */
 463     if (rc)
 464       sim_printf ("createCPUThread pthread_create %d\n", rc);
 465 
 466 #if defined(AFFINITY)
 467     if (cpus[cpuNum].set_affinity)
 468       {
 469         cpu_set_t cpuset;
 470         CPU_ZERO (& cpuset);
 471         CPU_SET (cpus[cpuNum].affinity, & cpuset);
 472         int s = pthread_setaffinity_np (p->cpuThread, sizeof (cpu_set_t), & cpuset);
 473         if (s)
 474           sim_printf ("pthread_setaffinity_np %u on CPU %u returned %d\n",
 475                       cpus[cpuNum].affinity, cpuNum, s);
 476       }
 477 #endif /* if defined(AFFINITY) */
 478   }
 479 
 480 void stopCPUThread(void)
     /*  */
 481   {
 482     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 483     p->run = false;
 484     pthread_exit(NULL);
 485   }
 486 
 487 // Called by CPU thread to block on run/sleep
 488 
 489 #if defined(THREADZ)
 490 void cpuRunningWait (void)
     /*  */
 491   {
 492     int rc;
 493     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 494     if (p->run)
 495       return;
 496     rc = pthread_mutex_lock (& p->runLock);
 497     if (rc)
 498       sim_printf ("cpuRunningWait pthread_mutex_lock %d\n", rc);
 499     while (! p->run)
 500       {
 501         rc = pthread_cond_wait (& p->runCond, & p->runLock);
 502         if (rc)
 503           sim_printf ("cpuRunningWait pthread_cond_wait %d\n", rc);
 504      }
 505     rc = pthread_mutex_unlock (& p->runLock);
 506     if (rc)
 507       sim_printf ("cpuRunningWait pthread_mutex_unlock %d\n", rc);
 508   }
 509 #endif
 510 
 511 // Called by CPU thread to sleep until time up or signaled
 512 // Return time left
 513 unsigned long  sleepCPU (unsigned long usec) {
     /*  */
 514   int rc;
 515   struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 516   struct timespec startTime, absTime;
 517 
 518 #if defined(USE_MONOTONIC)
 519   clock_gettime (p->sleepClock, & startTime);
 520 #else
 521   clock_gettime (CLOCK_REALTIME, & startTime);
 522 #endif /* if defined(USE_MONOTONIC) */
 523   absTime = startTime;
 524   int64_t nsec = ((int64_t) usec) * 1000L + (int64_t)startTime.tv_nsec;
 525   absTime.tv_nsec = nsec % 1000000000L;
 526   absTime.tv_sec += nsec / 1000000000L;
 527 
 528   rc = pthread_cond_timedwait (& p->sleepCond, & scu_lock, & absTime);
 529 
 530   if (rc == ETIMEDOUT) {
 531     return 0;
 532   }
 533 
 534   if (rc) {
 535     cpu_state_t * cpup = _cpup;
 536     sim_printf ("sleepCPU pthread_cond_timedwait rc %ld  usec %ld TR %lu CPU %lu\n",
 537                 (long) rc, (long) usec, (unsigned long) cpu.rTR,
 538                 (unsigned long) current_running_cpu_idx);
 539   }
 540 
 541   struct timespec newTime;
 542   struct timespec delta;
 543 #if defined(USE_MONOTONIC)
 544   clock_gettime (p->sleepClock, & newTime);
 545 #else
 546   clock_gettime (CLOCK_REALTIME, & newTime);
 547 #endif /* if defined(USE_MONOTONIC) */
 548   timespec_diff (& absTime, & newTime, & delta);
 549 
 550   if (delta.tv_nsec < 0)
 551     return 0; // safety
 552   return (unsigned long) delta.tv_nsec / 1000L;
 553 }
 554 
 555 // Called to wake sleeping CPU; such as interrupt during DIS
 556 
 557 void wakeCPU (uint cpuNum)
     /*  */
 558   {
 559     int rc;
 560     struct cpuThreadz_t * p = & cpuThreadz[cpuNum];
 561 
 562     rc = pthread_cond_signal (& p->sleepCond);
 563     if (rc)
 564       sim_printf ("wakeCPU pthread_cond_signal %d\n", rc);
 565   }
 566 
 567 #if defined(IO_THREADZ)
 568 ////////////////////////////////////////////////////////////////////////////////
 569 //
 570 // IOM threads
 571 //
 572 ////////////////////////////////////////////////////////////////////////////////
 573 
 574 // main thread
 575 //   createIOMThread    create thread
 576 //   iomRdyWait         wait for IOM started
 577 //   setIOMInterrupt    signal IOM to start
 578 //   iomDoneWait        wait for IOM done
 579 // IOM thread
 580 //   iomInterruptWait   IOM thread wait for work
 581 //   iomInterruptDone   IOM thread signal done working
 582 //
 583 //   IOM thread
 584 //     while (1)
 585 //       {
 586 //         iomInterruptWake
 587 //         work...
 588 //         iomInterruptDone
 589 //      }
 590 
 591 struct iomThreadz_t iomThreadz [N_IOM_UNITS_MAX];
 592 
 593 // Create IOM thread
 594 
 595 void createIOMThread (uint iomNum)
     /*  */
 596   {
 597     int rc;
 598     struct iomThreadz_t * p = & iomThreadz[iomNum];
 599 # if defined(tdbg)
 600     p->inCnt = 0;
 601     p->outCnt = 0;
 602 # endif
 603     p->iomThreadArg = (int) iomNum;
 604 
 605     p->ready = false;
 606     // initialize interrupt wait
 607     p->intr = false;
 608     rc = pthread_mutex_init (& p->intrLock, NULL);
 609     if (rc)
 610       sim_printf ("createIOMThread pthread_mutex_init intrLock %d\n", rc);
 611     rc = pthread_cond_init (& p->intrCond, NULL);
 612     if (rc)
 613       sim_printf ("createIOMThread pthread_cond_init intrCond %d\n", rc);
 614 
 615 # if defined(__APPLE__)
 616     rc = pthread_create_with_cpu_policy(
 617             & p->iomThread,
 618             iomNum,
 619             NULL,
 620             iom_thread_main,
 621             & p->iomThreadArg);
 622 # else
 623     rc = pthread_create(
 624             & p->iomThread,
 625             NULL,
 626             iom_thread_main,
 627             & p->iomThreadArg);
 628 # endif /* if defined(__APPLE__) */
 629     if (rc)
 630       sim_printf ("createIOMThread pthread_create %d\n", rc);
 631   }
 632 
 633 // Called by IOM thread to block until CIOC call
 634 
 635 void iomInterruptWait (void)
     /*  */
 636   {
 637     int rc;
 638     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 639     rc = pthread_mutex_lock (& p->intrLock);
 640     if (rc)
 641       sim_printf ("iomInterruptWait pthread_mutex_lock %d\n", rc);
 642     p -> ready = true;
 643     while (! p->intr)
 644       {
 645         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 646         if (rc)
 647           sim_printf ("iomInterruptWait pthread_cond_wait %d\n", rc);
 648       }
 649 # if defined(tdbg)
 650     p->outCnt++;
 651     if (p->inCnt != p->outCnt)
 652       sim_printf ("iom thread %d in %d out %d\n", this_iom_idx,
 653                   p->inCnt, p->outCnt);
 654 # endif
 655   }
 656 
 657 // Called by IOM thread to signal CIOC complete
 658 
 659 void iomInterruptDone (void)
     /*  */
 660   {
 661     int rc;
 662     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 663     p->intr = false;
 664     rc = pthread_cond_signal (& p->intrCond);
 665     if (rc)
 666       sim_printf ("iomInterruptDone pthread_cond_signal %d\n", rc);
 667     rc = pthread_mutex_unlock (& p->intrLock);
 668     if (rc)
 669       sim_printf ("iomInterruptDone pthread_mutex_unlock %d\n", rc);
 670   }
 671 
 672 // Called by CPU thread to wait for iomInterruptDone
 673 
 674 void iomDoneWait (uint iomNum)
     /*  */
 675   {
 676     int rc;
 677     struct iomThreadz_t * p = & iomThreadz[iomNum];
 678     rc = pthread_mutex_lock (& p->intrLock);
 679     if (rc)
 680       sim_printf ("iomDoneWait pthread_mutex_lock %d\n", rc);
 681     while (p->intr)
 682       {
 683         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 684         if (rc)
 685           sim_printf ("iomDoneWait pthread_cond_wait %d\n", rc);
 686       }
 687     rc = pthread_mutex_unlock (& p->intrLock);
 688     if (rc)
 689       sim_printf ("iomDoneWait pthread_mutex_unlock %d\n", rc);
 690   }
 691 
 692 // Signal CIOC to IOM thread
 693 
 694 void setIOMInterrupt (uint iomNum)
     /*  */
 695   {
 696     int rc;
 697     struct iomThreadz_t * p = & iomThreadz[iomNum];
 698     rc = pthread_mutex_lock (& p->intrLock);
 699     if (rc)
 700       sim_printf ("setIOMInterrupt pthread_mutex_lock %d\n", rc);
 701     while (p->intr)
 702       {
 703         rc = pthread_cond_wait(&p->intrCond, &p->intrLock);
 704         if (rc)
 705           sim_printf ("setIOMInterrupt pthread_cond_wait intrLock %d\n", rc);
 706       }
 707 # if defined(tdbg)
 708     p->inCnt++;
 709 # endif
 710     p->intr = true;
 711     rc = pthread_cond_signal (& p->intrCond);
 712     if (rc)
 713       sim_printf ("setIOMInterrupt pthread_cond_signal %d\n", rc);
 714     rc = pthread_mutex_unlock (& p->intrLock);
 715     if (rc)
 716       sim_printf ("setIOMInterrupt pthread_mutex_unlock %d\n", rc);
 717   }
 718 
 719 // Wait for IOM thread to initialize
 720 
 721 void iomRdyWait (uint iomNum)
     /*  */
 722   {
 723     struct iomThreadz_t * p = & iomThreadz[iomNum];
 724     while (! p -> ready)
 725       sim_usleep (10000);
 726    }
 727 
 728 ////////////////////////////////////////////////////////////////////////////////
 729 //
 730 // Channel threads
 731 //
 732 ////////////////////////////////////////////////////////////////////////////////
 733 
 734 // main thread
 735 //   createChnThread    create thread
 736 // IOM thread
 737 //   chnRdyWait         wait for channel started
 738 //   setChnConnect      signal channel to start
 739 // Channel thread
 740 //   chnConnectWait     Channel thread wait for work
 741 //   chnConnectDone     Channel thread signal done working
 742 //
 743 //   IOM thread
 744 //     while (1)
 745 //       {
 746 //         iomInterruptWake
 747 //         work...
 748 //         iomInterruptDone
 749 //      }
 750 struct chnThreadz_t chnThreadz [N_IOM_UNITS_MAX] [MAX_CHANNELS];
 751 
 752 // Create channel thread
 753 
 754 void createChnThread (uint iomNum, uint chnNum, const char * devTypeStr)
     /*  */
 755   {
 756     int rc;
 757     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 758     p->chnThreadArg = (int) (chnNum + iomNum * MAX_CHANNELS);
 759 
 760 # if defined(tdbg)
 761     p->inCnt = 0;
 762     p->outCnt = 0;
 763 # endif
 764     p->ready = false;
 765     // initialize interrupt wait
 766     p->connect = false;
 767     rc = pthread_mutex_init (& p->connectLock, NULL);
 768     if (rc)
 769       sim_printf ("createChnThread pthread_mutex_init connectLock %d\n", rc);
 770     rc = pthread_cond_init (& p->connectCond, NULL);
 771     if (rc)
 772       sim_printf ("createChnThread pthread_cond_init connectCond %d\n", rc);
 773 
 774 # if defined(__APPLE__)
 775     rc = pthread_create_with_cpu_policy(
 776             & p->chnThread,
 777             iomNum
 778             NULL,
 779             chan_thread_main,
 780             & p->chnThreadArg);
 781 # else
 782     rc = pthread_create(
 783             & p->chnThread,
 784             NULL,
 785             chan_thread_main,
 786             & p->chnThreadArg);
 787 # endif /* if defined(__APPLE__) */
 788     if (rc)
 789       sim_printf ("createChnThread pthread_create %d\n", rc);
 790   }
 791 
 792 // Called by channel thread to block until I/O command presented
 793 
 794 void chnConnectWait (void)
     /*  */
 795   {
 796     int rc;
 797     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 798 
 799     rc = pthread_mutex_lock (& p->connectLock);
 800     if (rc)
 801       sim_printf ("chnConnectWait pthread_mutex_lock %d\n", rc);
 802     p -> ready = true;
 803     while (! p->connect)
 804       {
 805         rc = pthread_cond_wait (& p->connectCond, & p->connectLock);
 806         if (rc)
 807           sim_printf ("chnConnectWait pthread_cond_wait %d\n", rc);
 808       }
 809 # if defined(tdbg)
 810     p->outCnt++;
 811     if (p->inCnt != p->outCnt)
 812       sim_printf ("chn thread %d in %d out %d\n", this_chan_num,
 813                   p->inCnt, p->outCnt);
 814 # endif
 815   }
 816 
 817 // Called by channel thread to signal I/O complete
 818 
 819 void chnConnectDone (void)
     /*  */
 820   {
 821     int rc;
 822     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 823     p->connect = false;
 824     rc = pthread_cond_signal (& p->connectCond);
 825     if (rc)
 826       sim_printf ("chnInterruptDone pthread_cond_signal %d\n", rc);
 827     rc = pthread_mutex_unlock (& p->connectLock);
 828     if (rc)
 829       sim_printf ("chnConnectDone pthread_mutex_unlock %d\n", rc);
 830   }
 831 
 832 // Signal I/O presented to channel thread
 833 
 834 void setChnConnect (uint iomNum, uint chnNum)
     /*  */
 835   {
 836     int rc;
 837     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 838     rc = pthread_mutex_lock (& p->connectLock);
 839     if (rc)
 840       sim_printf ("setChnConnect pthread_mutex_lock %d\n", rc);
 841     while (p->connect)
 842       {
 843         rc = pthread_cond_wait(&p->connectCond, &p->connectLock);
 844         if (rc)
 845           sim_printf ("setChnInterrupt pthread_cond_wait connectLock %d\n", rc);
 846       }
 847 # if defined(tdbg)
 848     p->inCnt++;
 849 # endif
 850     p->connect = true;
 851     rc = pthread_cond_signal (& p->connectCond);
 852     if (rc)
 853       sim_printf ("setChnConnect pthread_cond_signal %d\n", rc);
 854     rc = pthread_mutex_unlock (& p->connectLock);
 855     if (rc)
 856       sim_printf ("setChnConnect pthread_mutex_unlock %d\n", rc);
 857   }
 858 
 859 // Block until channel thread ready
 860 
 861 void chnRdyWait (uint iomNum, uint chnNum)
     /*  */
 862   {
 863     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 864     while (! p -> ready)
 865       sim_usleep (10000);
 866    }
 867 #endif
 868 
 869 void initThreadz (void)
     /*  */
 870   {
 871 #if defined(IO_THREADZ)
 872     // chnThreadz is sparse; make sure 'started' is false
 873     (void)memset (chnThreadz, 0, sizeof (chnThreadz));
 874 #endif
 875 
 876 #if !defined(LOCKLESS)
 877     //pthread_rwlock_init (& mem_lock, PTHREAD_PROCESS_PRIVATE);
 878     have_mem_lock = false;
 879     have_rmw_lock = false;
 880 #endif
 881 #if defined(__FreeBSD__) || defined(__OpenBSD__)
 882     pthread_mutexattr_t scu_attr;
 883     pthread_mutexattr_init(&scu_attr);
 884 # if !defined(__OpenBSD__)
 885     pthread_mutexattr_settype(&scu_attr, PTHREAD_MUTEX_ADAPTIVE_NP);
 886 # endif
 887     pthread_mutex_init (& scu_lock, &scu_attr);
 888 #else
 889     pthread_mutex_init (& scu_lock, NULL);
 890 #endif /* FreeBSD || OpenBSD */
 891     pthread_mutexattr_t iom_attr;
 892     pthread_mutexattr_init(& iom_attr);
 893     pthread_mutexattr_settype(& iom_attr, PTHREAD_MUTEX_RECURSIVE);
 894 
 895     pthread_mutex_init (& iom_lock, & iom_attr);
 896 
 897     pthread_mutexattr_t libuv_attr;
 898     pthread_mutexattr_init(& libuv_attr);
 899     pthread_mutexattr_settype(& libuv_attr, PTHREAD_MUTEX_RECURSIVE);
 900 
 901     pthread_mutex_init (& libuv_lock, & libuv_attr);
 902 
 903 #if defined(IO_ASYNC_PAYLOAD_CHAN_THREAD)
 904     pthread_cond_init (& iomCond, NULL);
 905     pthread_mutex_init (& iom_start_lock, NULL);
 906 #endif
 907   }
 908 
 909 // Set up per-thread signal handlers
 910 
 911 void int_handler (int signal);
 912 
 913 void setSignals (void)
     /*  */
 914   {
 915 #if !defined(__MINGW64__) && !defined(__MINGW32__)
 916     struct sigaction act;
 917     (void)memset (& act, 0, sizeof (act));
 918     act.sa_handler = int_handler;
 919     act.sa_flags = 0;
 920     sigaction (SIGINT, & act, NULL);
 921     sigaction (SIGTERM, & act, NULL);
 922 #endif /* if !defined(__MINGW64__) && !defined(__MINGW32__) */
 923   }
 924 
 925 
 926 
 927 
 928 
 929 
 930 
 931 
 932 
 933 
 934
/* */
root/src/dps8/threadz.c

DEFINITIONS
