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) 2021-2024 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     // Spin waiting for new thread to start executing code
 479     while (! cpus[cpuNum].up) {
 480       sim_usleep (1);
 481     }
 482   }
 483 
 484 void stopCPUThread(void)
     /*  */
 485   {
 486     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 487     p->run = false;
 488     pthread_exit(NULL);
 489   }
 490 
 491 // Called by CPU thread to block on run/sleep
 492 
 493 #if defined(THREADZ)
 494 void cpuRunningWait (void)
     /*  */
 495   {
 496     int rc;
 497     struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 498     if (p->run)
 499       return;
 500     rc = pthread_mutex_lock (& p->runLock);
 501     if (rc)
 502       sim_printf ("cpuRunningWait pthread_mutex_lock %d\n", rc);
 503     while (! p->run)
 504       {
 505         rc = pthread_cond_wait (& p->runCond, & p->runLock);
 506         if (rc)
 507           sim_printf ("cpuRunningWait pthread_cond_wait %d\n", rc);
 508      }
 509     rc = pthread_mutex_unlock (& p->runLock);
 510     if (rc)
 511       sim_printf ("cpuRunningWait pthread_mutex_unlock %d\n", rc);
 512   }
 513 #endif
 514 
 515 // Called by CPU thread to sleep until time up or signaled
 516 // Return time left
 517 unsigned long  sleepCPU (unsigned long usec) {
     /*  */
 518   int rc;
 519   struct cpuThreadz_t * p = & cpuThreadz[current_running_cpu_idx];
 520   struct timespec startTime, absTime;
 521 
 522 #if defined(USE_MONOTONIC)
 523   clock_gettime (p->sleepClock, & startTime);
 524 #else
 525   clock_gettime (CLOCK_REALTIME, & startTime);
 526 #endif /* if defined(USE_MONOTONIC) */
 527   absTime = startTime;
 528   int64_t nsec = ((int64_t) usec) * 1000L + (int64_t)startTime.tv_nsec;
 529   absTime.tv_nsec = nsec % 1000000000L;
 530   absTime.tv_sec += nsec / 1000000000L;
 531 
 532   rc = pthread_cond_timedwait (& p->sleepCond, & scu_lock, & absTime);
 533 
 534   if (rc == ETIMEDOUT) {
 535     return 0;
 536   }
 537 
 538   if (rc) {
 539     cpu_state_t * cpup = _cpup;
 540     sim_printf ("sleepCPU pthread_cond_timedwait rc %ld  usec %ld TR %lu CPU %lu\n",
 541                 (long) rc, (long) usec, (unsigned long) cpu.rTR,
 542                 (unsigned long) current_running_cpu_idx);
 543   }
 544 
 545   struct timespec newTime;
 546   struct timespec delta;
 547 #if defined(USE_MONOTONIC)
 548   clock_gettime (p->sleepClock, & newTime);
 549 #else
 550   clock_gettime (CLOCK_REALTIME, & newTime);
 551 #endif /* if defined(USE_MONOTONIC) */
 552   timespec_diff (& absTime, & newTime, & delta);
 553 
 554   if (delta.tv_nsec < 0)
 555     return 0; // safety
 556   return (unsigned long) delta.tv_nsec / 1000L;
 557 }
 558 
 559 // Called to wake sleeping CPU; such as interrupt during DIS
 560 
 561 void wakeCPU (uint cpuNum)
     /*  */
 562   {
 563     int rc;
 564     struct cpuThreadz_t * p = & cpuThreadz[cpuNum];
 565 
 566     rc = pthread_cond_signal (& p->sleepCond);
 567     if (rc)
 568       sim_printf ("wakeCPU pthread_cond_signal %d\n", rc);
 569   }
 570 
 571 #if defined(IO_THREADZ)
 572 ////////////////////////////////////////////////////////////////////////////////
 573 //
 574 // IOM threads
 575 //
 576 ////////////////////////////////////////////////////////////////////////////////
 577 
 578 // main thread
 579 //   createIOMThread    create thread
 580 //   iomRdyWait         wait for IOM started
 581 //   setIOMInterrupt    signal IOM to start
 582 //   iomDoneWait        wait for IOM done
 583 // IOM thread
 584 //   iomInterruptWait   IOM thread wait for work
 585 //   iomInterruptDone   IOM thread signal done working
 586 //
 587 //   IOM thread
 588 //     while (1)
 589 //       {
 590 //         iomInterruptWake
 591 //         work...
 592 //         iomInterruptDone
 593 //      }
 594 
 595 struct iomThreadz_t iomThreadz [N_IOM_UNITS_MAX];
 596 
 597 // Create IOM thread
 598 
 599 void createIOMThread (uint iomNum)
     /*  */
 600   {
 601     int rc;
 602     struct iomThreadz_t * p = & iomThreadz[iomNum];
 603 # if defined(tdbg)
 604     p->inCnt = 0;
 605     p->outCnt = 0;
 606 # endif
 607     p->iomThreadArg = (int) iomNum;
 608 
 609     p->ready = false;
 610     // initialize interrupt wait
 611     p->intr = false;
 612     rc = pthread_mutex_init (& p->intrLock, NULL);
 613     if (rc)
 614       sim_printf ("createIOMThread pthread_mutex_init intrLock %d\n", rc);
 615     rc = pthread_cond_init (& p->intrCond, NULL);
 616     if (rc)
 617       sim_printf ("createIOMThread pthread_cond_init intrCond %d\n", rc);
 618 
 619 # if defined(__APPLE__)
 620     rc = pthread_create_with_cpu_policy(
 621             & p->iomThread,
 622             iomNum,
 623             NULL,
 624             iom_thread_main,
 625             & p->iomThreadArg);
 626 # else
 627     rc = pthread_create(
 628             & p->iomThread,
 629             NULL,
 630             iom_thread_main,
 631             & p->iomThreadArg);
 632 # endif /* if defined(__APPLE__) */
 633     if (rc)
 634       sim_printf ("createIOMThread pthread_create %d\n", rc);
 635 
 636     char nm [17];
 637     (void)sprintf (nm, "IOM %c", 'a' + iomNum);
 638 # if defined(__FreeBSD__) || defined(__OpenBSD__)
 639     pthread_setname_np (p->iomThread, nm);
 640 # else
 641     pthread_set_name_np (p->iomThread, nm);
 642 # endif /* if defined(__FreeBSD__) || defined(__OpenBSD__) */
 643   }
 644 
 645 // Called by IOM thread to block until CIOC call
 646 
 647 void iomInterruptWait (void)
     /*  */
 648   {
 649     int rc;
 650     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 651     rc = pthread_mutex_lock (& p->intrLock);
 652     if (rc)
 653       sim_printf ("iomInterruptWait pthread_mutex_lock %d\n", rc);
 654     p -> ready = true;
 655     while (! p->intr)
 656       {
 657         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 658         if (rc)
 659           sim_printf ("iomInterruptWait pthread_cond_wait %d\n", rc);
 660       }
 661 # if defined(tdbg)
 662     p->outCnt++;
 663     if (p->inCnt != p->outCnt)
 664       sim_printf ("iom thread %d in %d out %d\n", this_iom_idx,
 665                   p->inCnt, p->outCnt);
 666 # endif
 667   }
 668 
 669 // Called by IOM thread to signal CIOC complete
 670 
 671 void iomInterruptDone (void)
     /*  */
 672   {
 673     int rc;
 674     struct iomThreadz_t * p = & iomThreadz[this_iom_idx];
 675     p->intr = false;
 676     rc = pthread_cond_signal (& p->intrCond);
 677     if (rc)
 678       sim_printf ("iomInterruptDone pthread_cond_signal %d\n", rc);
 679     rc = pthread_mutex_unlock (& p->intrLock);
 680     if (rc)
 681       sim_printf ("iomInterruptDone pthread_mutex_unlock %d\n", rc);
 682   }
 683 
 684 // Called by CPU thread to wait for iomInterruptDone
 685 
 686 void iomDoneWait (uint iomNum)
     /*  */
 687   {
 688     int rc;
 689     struct iomThreadz_t * p = & iomThreadz[iomNum];
 690     rc = pthread_mutex_lock (& p->intrLock);
 691     if (rc)
 692       sim_printf ("iomDoneWait pthread_mutex_lock %d\n", rc);
 693     while (p->intr)
 694       {
 695         rc = pthread_cond_wait (& p->intrCond, & p->intrLock);
 696         if (rc)
 697           sim_printf ("iomDoneWait pthread_cond_wait %d\n", rc);
 698       }
 699     rc = pthread_mutex_unlock (& p->intrLock);
 700     if (rc)
 701       sim_printf ("iomDoneWait pthread_mutex_unlock %d\n", rc);
 702   }
 703 
 704 // Signal CIOC to IOM thread
 705 
 706 void setIOMInterrupt (uint iomNum)
     /*  */
 707   {
 708     int rc;
 709     struct iomThreadz_t * p = & iomThreadz[iomNum];
 710     rc = pthread_mutex_lock (& p->intrLock);
 711     if (rc)
 712       sim_printf ("setIOMInterrupt pthread_mutex_lock %d\n", rc);
 713     while (p->intr)
 714       {
 715         rc = pthread_cond_wait(&p->intrCond, &p->intrLock);
 716         if (rc)
 717           sim_printf ("setIOMInterrupt pthread_cond_wait intrLock %d\n", rc);
 718       }
 719 # if defined(tdbg)
 720     p->inCnt++;
 721 # endif
 722     p->intr = true;
 723     rc = pthread_cond_signal (& p->intrCond);
 724     if (rc)
 725       sim_printf ("setIOMInterrupt pthread_cond_signal %d\n", rc);
 726     rc = pthread_mutex_unlock (& p->intrLock);
 727     if (rc)
 728       sim_printf ("setIOMInterrupt pthread_mutex_unlock %d\n", rc);
 729   }
 730 
 731 // Wait for IOM thread to initialize
 732 
 733 void iomRdyWait (uint iomNum)
     /*  */
 734   {
 735     struct iomThreadz_t * p = & iomThreadz[iomNum];
 736     while (! p -> ready)
 737       sim_usleep (10000);
 738    }
 739 
 740 ////////////////////////////////////////////////////////////////////////////////
 741 //
 742 // Channel threads
 743 //
 744 ////////////////////////////////////////////////////////////////////////////////
 745 
 746 // main thread
 747 //   createChnThread    create thread
 748 // IOM thread
 749 //   chnRdyWait         wait for channel started
 750 //   setChnConnect      signal channel to start
 751 // Channel thread
 752 //   chnConnectWait     Channel thread wait for work
 753 //   chnConnectDone     Channel thread signal done working
 754 //
 755 //   IOM thread
 756 //     while (1)
 757 //       {
 758 //         iomInterruptWake
 759 //         work...
 760 //         iomInterruptDone
 761 //      }
 762 struct chnThreadz_t chnThreadz [N_IOM_UNITS_MAX] [MAX_CHANNELS];
 763 
 764 // Create channel thread
 765 
 766 void createChnThread (uint iomNum, uint chnNum, const char * devTypeStr)
     /*  */
 767   {
 768     int rc;
 769     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 770     p->chnThreadArg = (int) (chnNum + iomNum * MAX_CHANNELS);
 771 
 772 # if defined(tdbg)
 773     p->inCnt = 0;
 774     p->outCnt = 0;
 775 # endif
 776     p->ready = false;
 777     // initialize interrupt wait
 778     p->connect = false;
 779     rc = pthread_mutex_init (& p->connectLock, NULL);
 780     if (rc)
 781       sim_printf ("createChnThread pthread_mutex_init connectLock %d\n", rc);
 782     rc = pthread_cond_init (& p->connectCond, NULL);
 783     if (rc)
 784       sim_printf ("createChnThread pthread_cond_init connectCond %d\n", rc);
 785 
 786 # if defined(__APPLE__)
 787     rc = pthread_create_with_cpu_policy(
 788             & p->chnThread,
 789             iomNum
 790             NULL,
 791             chan_thread_main,
 792             & p->chnThreadArg);
 793 # else
 794     rc = pthread_create(
 795             & p->chnThread,
 796             NULL,
 797             chan_thread_main,
 798             & p->chnThreadArg);
 799 # endif /* if defined(__APPLE__) */
 800     if (rc)
 801       sim_printf ("createChnThread pthread_create %d\n", rc);
 802 
 803     char nm [17];
 804     (void)sprintf (nm, "chn %c/%u %s", 'a' + iomNum, chnNum, devTypeStr);
 805 # if defined(__FreeBSD__) || defined(__OpenBSD__)
 806     pthread_setname_np (p->chnThread, nm);
 807 # else
 808     pthread_set_name_np (p->chnThread, nm);
 809 # endif /* if defined(__FreeBSD__) || defined(__OpenBSD__) */
 810   }
 811 
 812 // Called by channel thread to block until I/O command presented
 813 
 814 void chnConnectWait (void)
     /*  */
 815   {
 816     int rc;
 817     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 818 
 819     rc = pthread_mutex_lock (& p->connectLock);
 820     if (rc)
 821       sim_printf ("chnConnectWait pthread_mutex_lock %d\n", rc);
 822     p -> ready = true;
 823     while (! p->connect)
 824       {
 825         rc = pthread_cond_wait (& p->connectCond, & p->connectLock);
 826         if (rc)
 827           sim_printf ("chnConnectWait pthread_cond_wait %d\n", rc);
 828       }
 829 # if defined(tdbg)
 830     p->outCnt++;
 831     if (p->inCnt != p->outCnt)
 832       sim_printf ("chn thread %d in %d out %d\n", this_chan_num,
 833                   p->inCnt, p->outCnt);
 834 # endif
 835   }
 836 
 837 // Called by channel thread to signal I/O complete
 838 
 839 void chnConnectDone (void)
     /*  */
 840   {
 841     int rc;
 842     struct chnThreadz_t * p = & chnThreadz[this_iom_idx][this_chan_num];
 843     p->connect = false;
 844     rc = pthread_cond_signal (& p->connectCond);
 845     if (rc)
 846       sim_printf ("chnInterruptDone pthread_cond_signal %d\n", rc);
 847     rc = pthread_mutex_unlock (& p->connectLock);
 848     if (rc)
 849       sim_printf ("chnConnectDone pthread_mutex_unlock %d\n", rc);
 850   }
 851 
 852 // Signal I/O presented to channel thread
 853 
 854 void setChnConnect (uint iomNum, uint chnNum)
     /*  */
 855   {
 856     int rc;
 857     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 858     rc = pthread_mutex_lock (& p->connectLock);
 859     if (rc)
 860       sim_printf ("setChnConnect pthread_mutex_lock %d\n", rc);
 861     while (p->connect)
 862       {
 863         rc = pthread_cond_wait(&p->connectCond, &p->connectLock);
 864         if (rc)
 865           sim_printf ("setChnInterrupt pthread_cond_wait connectLock %d\n", rc);
 866       }
 867 # if defined(tdbg)
 868     p->inCnt++;
 869 # endif
 870     p->connect = true;
 871     rc = pthread_cond_signal (& p->connectCond);
 872     if (rc)
 873       sim_printf ("setChnConnect pthread_cond_signal %d\n", rc);
 874     rc = pthread_mutex_unlock (& p->connectLock);
 875     if (rc)
 876       sim_printf ("setChnConnect pthread_mutex_unlock %d\n", rc);
 877   }
 878 
 879 // Block until channel thread ready
 880 
 881 void chnRdyWait (uint iomNum, uint chnNum)
     /*  */
 882   {
 883     struct chnThreadz_t * p = & chnThreadz[iomNum][chnNum];
 884     while (! p -> ready)
 885       sim_usleep (10000);
 886    }
 887 #endif
 888 
 889 void initThreadz (void)
     /*  */
 890   {
 891 #if defined(IO_THREADZ)
 892     // chnThreadz is sparse; make sure 'started' is false
 893     (void)memset (chnThreadz, 0, sizeof (chnThreadz));
 894 #endif
 895 
 896 #if !defined(LOCKLESS)
 897     //pthread_rwlock_init (& mem_lock, PTHREAD_PROCESS_PRIVATE);
 898     have_mem_lock = false;
 899     have_rmw_lock = false;
 900 #endif
 901 #if defined(__FreeBSD__) || defined(__OpenBSD__)
 902     pthread_mutexattr_t scu_attr;
 903     pthread_mutexattr_init(&scu_attr);
 904 # if !defined(__OpenBSD__)
 905     pthread_mutexattr_settype(&scu_attr, PTHREAD_MUTEX_ADAPTIVE_NP);
 906 # endif
 907     pthread_mutex_init (& scu_lock, &scu_attr);
 908 #else
 909     pthread_mutex_init (& scu_lock, NULL);
 910 #endif /* FreeBSD || OpenBSD */
 911     pthread_mutexattr_t iom_attr;
 912     pthread_mutexattr_init(& iom_attr);
 913     pthread_mutexattr_settype(& iom_attr, PTHREAD_MUTEX_RECURSIVE);
 914 
 915     pthread_mutex_init (& iom_lock, & iom_attr);
 916 
 917     pthread_mutexattr_t libuv_attr;
 918     pthread_mutexattr_init(& libuv_attr);
 919     pthread_mutexattr_settype(& libuv_attr, PTHREAD_MUTEX_RECURSIVE);
 920 
 921     pthread_mutex_init (& libuv_lock, & libuv_attr);
 922 
 923 #if defined(IO_ASYNC_PAYLOAD_CHAN_THREAD)
 924     pthread_cond_init (& iomCond, NULL);
 925     pthread_mutex_init (& iom_start_lock, NULL);
 926 #endif
 927   }
 928 
 929 // Set up per-thread signal handlers
 930 
 931 void int_handler (int signal);
 932 
 933 void setSignals (void)
     /*  */
 934   {
 935 #if !defined(__MINGW64__) && !defined(__MINGW32__)
 936     struct sigaction act;
 937     (void)memset (& act, 0, sizeof (act));
 938     act.sa_handler = int_handler;
 939     act.sa_flags = 0;
 940     sigaction (SIGINT, & act, NULL);
 941     sigaction (SIGTERM, & act, NULL);
 942 #endif /* if !defined(__MINGW64__) && !defined(__MINGW32__) */
 943   }
 944 
 945 
 946 
 947 
 948 
 949 
 950 
 951 
 952 
 953 
 954
/* */
root/src/dps8/threadz.c

DEFINITIONS
