1------------------------------------------------------------------------------ 2-- -- 3-- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS -- 4-- -- 5-- S Y S T E M . O S _ I N T E R F A C E -- 6-- -- 7-- B o d y -- 8-- -- 9-- Copyright (C) 1999-2003 Free Software Foundation, Inc. -- 10-- -- 11-- GNARL is free software; you can redistribute it and/or modify it under -- 12-- terms of the GNU General Public License as published by the Free Soft- -- 13-- ware Foundation; either version 2, or (at your option) any later ver- -- 14-- sion. GNARL is distributed in the hope that it will be useful, but WITH- -- 15-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 16-- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License -- 17-- for more details. You should have received a copy of the GNU General -- 18-- Public License distributed with GNARL; see file COPYING. If not, write -- 19-- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, -- 20-- MA 02111-1307, USA. -- 21-- -- 22-- As a special exception, if other files instantiate generics from this -- 23-- unit, or you link this unit with other files to produce an executable, -- 24-- this unit does not by itself cause the resulting executable to be -- 25-- covered by the GNU General Public License. This exception does not -- 26-- however invalidate any other reasons why the executable file might be -- 27-- covered by the GNU Public License. -- 28-- -- 29-- GNARL was developed by the GNARL team at Florida State University. -- 30-- Extensive contributions were provided by Ada Core Technologies, Inc. -- 31-- -- 32------------------------------------------------------------------------------ 33 34-- This is a LynxOS (Native) version of this package 35 36pragma Polling (Off); 37-- Turn off polling, we do not want ATC polling to take place during 38-- tasking operations. It causes infinite loops and other problems. 39 40with Interfaces.C; 41 42package body System.OS_Interface is 43 44 use Interfaces.C; 45 46 ------------------- 47 -- clock_gettime -- 48 ------------------- 49 50 function clock_gettime 51 (clock_id : clockid_t; 52 tp : access timespec) 53 return int 54 is 55 function clock_gettime_base 56 (clock_id : clockid_t; 57 tp : access timespec) 58 return int; 59 pragma Import (C, clock_gettime_base, "clock_gettime"); 60 61 begin 62 if clock_gettime_base (clock_id, tp) /= 0 then 63 return errno; 64 end if; 65 66 return 0; 67 end clock_gettime; 68 69 ----------------- 70 -- To_Duration -- 71 ----------------- 72 73 function To_Duration (TS : timespec) return Duration is 74 begin 75 return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9; 76 end To_Duration; 77 78 function To_Duration (TV : struct_timeval) return Duration is 79 begin 80 return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6; 81 end To_Duration; 82 83 ----------------- 84 -- To_Timespec -- 85 ----------------- 86 87 function To_Timespec (D : Duration) return timespec is 88 S : time_t; 89 F : Duration; 90 91 begin 92 S := time_t (Long_Long_Integer (D)); 93 F := D - Duration (S); 94 95 -- If F has negative value due to a round-up, adjust for positive F 96 -- value. 97 98 if F < 0.0 then 99 S := S - 1; 100 F := F + 1.0; 101 end if; 102 103 return timespec'(tv_sec => S, 104 tv_nsec => long (Long_Long_Integer (F * 10#1#E9))); 105 end To_Timespec; 106 107 ---------------- 108 -- To_Timeval -- 109 ---------------- 110 111 function To_Timeval (D : Duration) return struct_timeval is 112 S : time_t; 113 F : Duration; 114 115 begin 116 S := time_t (Long_Long_Integer (D)); 117 F := D - Duration (S); 118 119 -- If F has negative value due to a round-up, adjust for positive F 120 -- value. 121 122 if F < 0.0 then 123 S := S - 1; 124 F := F + 1.0; 125 end if; 126 127 return struct_timeval'(tv_sec => S, 128 tv_usec => time_t (Long_Long_Integer (F * 10#1#E6))); 129 end To_Timeval; 130 131 ------------------------- 132 -- POSIX.1c Section 3 -- 133 ------------------------- 134 135 function sigwait 136 (set : access sigset_t; 137 sig : access Signal) 138 return int 139 is 140 function sigwait_base 141 (set : access sigset_t; 142 value : System.Address) 143 return Signal; 144 pragma Import (C, sigwait_base, "sigwait"); 145 146 begin 147 sig.all := sigwait_base (set, Null_Address); 148 149 if sig.all = -1 then 150 return errno; 151 end if; 152 153 return 0; 154 end sigwait; 155 156 -------------------------- 157 -- POSIX.1c Section 11 -- 158 -------------------------- 159 160 -- For all the following functions, LynxOS threads has the POSIX Draft 4 161 -- begavior; it sets errno but the standard Posix requires it to be 162 -- returned. 163 164 function pthread_mutexattr_init 165 (attr : access pthread_mutexattr_t) 166 return int 167 is 168 function pthread_mutexattr_create 169 (attr : access pthread_mutexattr_t) 170 return int; 171 pragma Import (C, pthread_mutexattr_create, "pthread_mutexattr_create"); 172 173 begin 174 if pthread_mutexattr_create (attr) /= 0 then 175 return errno; 176 end if; 177 178 return 0; 179 end pthread_mutexattr_init; 180 181 function pthread_mutexattr_destroy 182 (attr : access pthread_mutexattr_t) 183 return int 184 is 185 function pthread_mutexattr_delete 186 (attr : access pthread_mutexattr_t) 187 return int; 188 pragma Import (C, pthread_mutexattr_delete, "pthread_mutexattr_delete"); 189 190 begin 191 if pthread_mutexattr_delete (attr) /= 0 then 192 return errno; 193 end if; 194 195 return 0; 196 end pthread_mutexattr_destroy; 197 198 function pthread_mutex_init 199 (mutex : access pthread_mutex_t; 200 attr : access pthread_mutexattr_t) 201 return int 202 is 203 function pthread_mutex_init_base 204 (mutex : access pthread_mutex_t; 205 attr : pthread_mutexattr_t) 206 return int; 207 pragma Import (C, pthread_mutex_init_base, "pthread_mutex_init"); 208 209 begin 210 if pthread_mutex_init_base (mutex, attr.all) /= 0 then 211 return errno; 212 end if; 213 214 return 0; 215 end pthread_mutex_init; 216 217 function pthread_mutex_destroy 218 (mutex : access pthread_mutex_t) 219 return int 220 is 221 function pthread_mutex_destroy_base 222 (mutex : access pthread_mutex_t) 223 return int; 224 pragma Import (C, pthread_mutex_destroy_base, "pthread_mutex_destroy"); 225 226 begin 227 if pthread_mutex_destroy_base (mutex) /= 0 then 228 return errno; 229 end if; 230 231 return 0; 232 end pthread_mutex_destroy; 233 234 function pthread_mutex_lock 235 (mutex : access pthread_mutex_t) 236 return int 237 is 238 function pthread_mutex_lock_base 239 (mutex : access pthread_mutex_t) 240 return int; 241 pragma Import (C, pthread_mutex_lock_base, "pthread_mutex_lock"); 242 243 begin 244 if pthread_mutex_lock_base (mutex) /= 0 then 245 return errno; 246 end if; 247 248 return 0; 249 end pthread_mutex_lock; 250 251 function pthread_mutex_unlock 252 (mutex : access pthread_mutex_t) 253 return int 254 is 255 function pthread_mutex_unlock_base 256 (mutex : access pthread_mutex_t) 257 return int; 258 pragma Import (C, pthread_mutex_unlock_base, "pthread_mutex_unlock"); 259 260 begin 261 if pthread_mutex_unlock_base (mutex) /= 0 then 262 return errno; 263 end if; 264 265 return 0; 266 end pthread_mutex_unlock; 267 268 function pthread_condattr_init 269 (attr : access pthread_condattr_t) 270 return int 271 is 272 function pthread_condattr_create 273 (attr : access pthread_condattr_t) 274 return int; 275 pragma Import (C, pthread_condattr_create, "pthread_condattr_create"); 276 277 begin 278 if pthread_condattr_create (attr) /= 0 then 279 return errno; 280 end if; 281 282 return 0; 283 end pthread_condattr_init; 284 285 function pthread_condattr_destroy 286 (attr : access pthread_condattr_t) 287 return int 288 is 289 function pthread_condattr_delete 290 (attr : access pthread_condattr_t) 291 return int; 292 pragma Import (C, pthread_condattr_delete, "pthread_condattr_delete"); 293 294 begin 295 if pthread_condattr_delete (attr) /= 0 then 296 return errno; 297 end if; 298 299 return 0; 300 end pthread_condattr_destroy; 301 302 function pthread_cond_init 303 (cond : access pthread_cond_t; 304 attr : access pthread_condattr_t) 305 return int 306 is 307 function pthread_cond_init_base 308 (cond : access pthread_cond_t; 309 attr : pthread_condattr_t) 310 return int; 311 pragma Import (C, pthread_cond_init_base, "pthread_cond_init"); 312 313 begin 314 if pthread_cond_init_base (cond, attr.all) /= 0 then 315 return errno; 316 end if; 317 318 return 0; 319 end pthread_cond_init; 320 321 function pthread_cond_destroy 322 (cond : access pthread_cond_t) 323 return int 324 is 325 function pthread_cond_destroy_base 326 (cond : access pthread_cond_t) 327 return int; 328 pragma Import (C, pthread_cond_destroy_base, "pthread_cond_destroy"); 329 330 begin 331 if pthread_cond_destroy_base (cond) /= 0 then 332 return errno; 333 end if; 334 335 return 0; 336 end pthread_cond_destroy; 337 338 function pthread_cond_signal 339 (cond : access pthread_cond_t) 340 return int 341 is 342 function pthread_cond_signal_base 343 (cond : access pthread_cond_t) 344 return int; 345 pragma Import (C, pthread_cond_signal_base, "pthread_cond_signal"); 346 347 begin 348 if pthread_cond_signal_base (cond) /= 0 then 349 return errno; 350 end if; 351 352 return 0; 353 end pthread_cond_signal; 354 355 function pthread_cond_wait 356 (cond : access pthread_cond_t; 357 mutex : access pthread_mutex_t) 358 return int 359 is 360 function pthread_cond_wait_base 361 (cond : access pthread_cond_t; 362 mutex : access pthread_mutex_t) 363 return int; 364 pragma Import (C, pthread_cond_wait_base, "pthread_cond_wait"); 365 366 begin 367 if pthread_cond_wait_base (cond, mutex) /= 0 then 368 return errno; 369 end if; 370 371 return 0; 372 end pthread_cond_wait; 373 374 function pthread_cond_timedwait 375 (cond : access pthread_cond_t; 376 mutex : access pthread_mutex_t; 377 reltime : access timespec) return int 378 is 379 function pthread_cond_timedwait_base 380 (cond : access pthread_cond_t; 381 mutex : access pthread_mutex_t; 382 reltime : access timespec) return int; 383 pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait"); 384 385 begin 386 if pthread_cond_timedwait_base (cond, mutex, reltime) /= 0 then 387 if errno = EAGAIN then 388 return ETIMEDOUT; 389 end if; 390 391 return errno; 392 end if; 393 394 return 0; 395 end pthread_cond_timedwait; 396 397 -------------------------- 398 -- POSIX.1c Section 13 -- 399 -------------------------- 400 401 function pthread_setschedparam 402 (thread : pthread_t; 403 policy : int; 404 param : access struct_sched_param) 405 return int 406 is 407 function pthread_setscheduler 408 (thread : pthread_t; 409 policy : int; 410 prio : int) 411 return int; 412 pragma Import (C, pthread_setscheduler, "pthread_setscheduler"); 413 414 begin 415 if pthread_setscheduler (thread, policy, param.sched_priority) = -1 then 416 return errno; 417 end if; 418 419 return 0; 420 end pthread_setschedparam; 421 422 function pthread_mutexattr_setprotocol 423 (attr : access pthread_mutexattr_t; 424 protocol : int) 425 return int 426 is 427 pragma Unreferenced (attr, protocol); 428 begin 429 return 0; 430 end pthread_mutexattr_setprotocol; 431 432 function pthread_mutexattr_setprioceiling 433 (attr : access pthread_mutexattr_t; 434 prioceiling : int) 435 return int 436 is 437 pragma Unreferenced (attr, prioceiling); 438 begin 439 return 0; 440 end pthread_mutexattr_setprioceiling; 441 442 function pthread_attr_setscope 443 (attr : access pthread_attr_t; 444 contentionscope : int) 445 return int 446 is 447 pragma Unreferenced (attr, contentionscope); 448 begin 449 return 0; 450 end pthread_attr_setscope; 451 452 function sched_yield return int is 453 procedure pthread_yield; 454 pragma Import (C, pthread_yield, "pthread_yield"); 455 456 begin 457 pthread_yield; 458 return 0; 459 end sched_yield; 460 461 ----------------------------- 462 -- P1003.1c - Section 16 -- 463 ----------------------------- 464 465 function pthread_attr_setdetachstate 466 (attr : access pthread_attr_t; 467 detachstate : int) 468 return int 469 is 470 pragma Unreferenced (attr, detachstate); 471 begin 472 return 0; 473 end pthread_attr_setdetachstate; 474 475 function pthread_create 476 (thread : access pthread_t; 477 attributes : access pthread_attr_t; 478 start_routine : Thread_Body; 479 arg : System.Address) 480 return int 481 is 482 -- The LynxOS pthread_create doesn't seems to work. 483 -- Workaround : We're using st_new instead. 484 -- 485 -- function pthread_create_base 486 -- (thread : access pthread_t; 487 -- attributes : pthread_attr_t; 488 -- start_routine : Thread_Body; 489 -- arg : System.Address) 490 -- return int; 491 -- pragma Import (C, pthread_create_base, "pthread_create"); 492 493 St : aliased st_t := attributes.st; 494 495 function st_new 496 (start_routine : Thread_Body; 497 arg : System.Address; 498 attributes : access st_t; 499 thread : access pthread_t) 500 return int; 501 pragma Import (C, st_new, "st_new"); 502 503 begin 504 -- Following code would be used if above commented function worked 505 506 -- if pthread_create_base 507 -- (thread, attributes.all, start_routine, arg) /= 0 then 508 509 if st_new (start_routine, arg, St'Access, thread) /= 0 then 510 return errno; 511 end if; 512 513 return 0; 514 end pthread_create; 515 516 function pthread_detach (thread : pthread_t) return int is 517 aliased_thread : aliased pthread_t := thread; 518 519 function pthread_detach_base (thread : access pthread_t) return int; 520 pragma Import (C, pthread_detach_base, "pthread_detach"); 521 522 begin 523 if pthread_detach_base (aliased_thread'Access) /= 0 then 524 return errno; 525 end if; 526 527 return 0; 528 end pthread_detach; 529 530 -------------------------- 531 -- POSIX.1c Section 17 -- 532 -------------------------- 533 534 function pthread_setspecific 535 (key : pthread_key_t; 536 value : System.Address) 537 return int 538 is 539 function pthread_setspecific_base 540 (key : pthread_key_t; 541 value : System.Address) 542 return int; 543 pragma Import (C, pthread_setspecific_base, "pthread_setspecific"); 544 545 begin 546 if pthread_setspecific_base (key, value) /= 0 then 547 return errno; 548 end if; 549 550 return 0; 551 end pthread_setspecific; 552 553 function pthread_getspecific (key : pthread_key_t) return System.Address is 554 procedure pthread_getspecific_base 555 (key : pthread_key_t; 556 value : access System.Address); 557 pragma Import (C, pthread_getspecific_base, "pthread_getspecific"); 558 559 value : aliased System.Address := System.Null_Address; 560 561 begin 562 pthread_getspecific_base (key, value'Unchecked_Access); 563 return value; 564 end pthread_getspecific; 565 566 function Get_Stack_Base (thread : pthread_t) return Address is 567 pragma Warnings (Off, thread); 568 569 begin 570 return Null_Address; 571 end Get_Stack_Base; 572 573 function pthread_key_create 574 (key : access pthread_key_t; 575 destructor : destructor_pointer) 576 return int 577 is 578 function pthread_keycreate 579 (key : access pthread_key_t; 580 destructor : destructor_pointer) 581 return int; 582 pragma Import (C, pthread_keycreate, "pthread_keycreate"); 583 584 begin 585 if pthread_keycreate (key, destructor) /= 0 then 586 return errno; 587 end if; 588 589 return 0; 590 end pthread_key_create; 591 592 procedure pthread_init is 593 begin 594 null; 595 end pthread_init; 596 597end System.OS_Interface; 598