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-- S p e c -- 8-- -- 9-- Copyright (C) 1991-1994, Florida State University -- 10-- Copyright (C) 1995-2016, Free Software Foundation, Inc. -- 11-- -- 12-- GNAT is free software; you can redistribute it and/or modify it under -- 13-- terms of the GNU General Public License as published by the Free Soft- -- 14-- ware Foundation; either version 3, or (at your option) any later ver- -- 15-- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- 16-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- 17-- or FITNESS FOR A PARTICULAR PURPOSE. -- 18-- -- 19-- As a special exception under Section 7 of GPL version 3, you are granted -- 20-- additional permissions described in the GCC Runtime Library Exception, -- 21-- version 3.1, as published by the Free Software Foundation. -- 22-- -- 23-- You should have received a copy of the GNU General Public License and -- 24-- a copy of the GCC Runtime Library Exception along with this program; -- 25-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- 26-- <http://www.gnu.org/licenses/>. -- 27-- -- 28-- GNARL was developed by the GNARL team at Florida State University. -- 29-- Extensive contributions were provided by Ada Core Technologies, Inc. -- 30-- -- 31------------------------------------------------------------------------------ 32 33-- This is the GNU/Hurd (POSIX Threads) version of this package 34 35-- This package encapsulates all direct interfaces to OS services 36-- that are needed by children of System. 37 38-- PLEASE DO NOT add any with-clauses to this package or remove the pragma 39-- Preelaborate. This package is designed to be a bottom-level (leaf) package 40 41with Interfaces.C; 42with Unchecked_Conversion; 43 44package System.OS_Interface is 45 pragma Preelaborate; 46 47 pragma Linker_Options ("-lpthread"); 48 pragma Linker_Options ("-lrt"); 49 50 subtype int is Interfaces.C.int; 51 subtype char is Interfaces.C.char; 52 subtype short is Interfaces.C.short; 53 subtype long is Interfaces.C.long; 54 subtype unsigned is Interfaces.C.unsigned; 55 subtype unsigned_short is Interfaces.C.unsigned_short; 56 subtype unsigned_long is Interfaces.C.unsigned_long; 57 subtype unsigned_char is Interfaces.C.unsigned_char; 58 subtype plain_char is Interfaces.C.plain_char; 59 subtype size_t is Interfaces.C.size_t; 60 61 ----------- 62 -- Errno -- 63 ----------- 64 -- From /usr/include/i386-gnu/bits/errno.h 65 66 function errno return int; 67 pragma Import (C, errno, "__get_errno"); 68 69 EAGAIN : constant := 1073741859; 70 EINTR : constant := 1073741828; 71 EINVAL : constant := 1073741846; 72 ENOMEM : constant := 1073741836; 73 EPERM : constant := 1073741825; 74 ETIMEDOUT : constant := 1073741884; 75 76 ------------- 77 -- Signals -- 78 ------------- 79 -- From /usr/include/i386-gnu/bits/signum.h 80 81 Max_Interrupt : constant := 32; 82 type Signal is new int range 0 .. Max_Interrupt; 83 for Signal'Size use int'Size; 84 85 SIGHUP : constant := 1; -- hangup 86 SIGINT : constant := 2; -- interrupt (rubout) 87 SIGQUIT : constant := 3; -- quit (ASCD FS) 88 SIGILL : constant := 4; -- illegal instruction (not reset) 89 SIGTRAP : constant := 5; -- trace trap (not reset) 90 SIGIOT : constant := 6; -- IOT instruction 91 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future 92 SIGEMT : constant := 7; -- EMT instruction 93 SIGFPE : constant := 8; -- floating point exception 94 SIGKILL : constant := 9; -- kill (cannot be caught or ignored) 95 SIGBUS : constant := 10; -- bus error 96 SIGSEGV : constant := 11; -- segmentation violation 97 SIGSYS : constant := 12; -- bad argument to system call 98 SIGPIPE : constant := 13; -- write on a pipe with no one to read it 99 SIGALRM : constant := 14; -- alarm clock 100 SIGTERM : constant := 15; -- software termination signal from kill 101 SIGURG : constant := 16; -- urgent condition on IO channel 102 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored) 103 SIGTSTP : constant := 18; -- user stop requested from tty 104 SIGCONT : constant := 19; -- stopped process has been continued 105 SIGCLD : constant := 20; -- alias for SIGCHLD 106 SIGCHLD : constant := 20; -- child status change 107 SIGTTIN : constant := 21; -- background tty read attempted 108 SIGTTOU : constant := 22; -- background tty write attempted 109 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias) 110 SIGPOLL : constant := 23; -- I/O possible (same as SIGIO?) 111 SIGXCPU : constant := 24; -- CPU time limit exceeded 112 SIGXFSZ : constant := 25; -- filesize limit exceeded 113 SIGVTALRM : constant := 26; -- virtual timer expired 114 SIGPROF : constant := 27; -- profiling timer expired 115 SIGWINCH : constant := 28; -- window size change 116 SIGINFO : constant := 29; -- information request (NetBSD/FreeBSD) 117 SIGUSR1 : constant := 30; -- user defined signal 1 118 SIGUSR2 : constant := 31; -- user defined signal 2 119 SIGLOST : constant := 32; -- Resource lost (Sun); server died (GNU) 120 121 SIGADAABORT : constant := SIGABRT; 122 -- Change this if you want to use another signal for task abort. 123 -- SIGTERM might be a good one. 124 125 type Signal_Set is array (Natural range <>) of Signal; 126 127 Unmasked : constant Signal_Set := ( 128 SIGTRAP, 129 -- To enable debugging on multithreaded applications, mark SIGTRAP to 130 -- be kept unmasked. 131 132 SIGBUS, 133 134 SIGTTIN, SIGTTOU, SIGTSTP, 135 -- Keep these three signals unmasked so that background processes 136 -- and IO behaves as normal "C" applications 137 138 SIGPROF, 139 -- To avoid confusing the profiler 140 141 SIGKILL, SIGSTOP); 142 -- These two signals actually cannot be masked; 143 -- POSIX simply won't allow it. 144 145 Reserved : constant Signal_Set := 146 -- I am not sure why the following signal is reserved. 147 -- I guess they are not supported by this version of GNU/Hurd. 148 (0 .. 0 => SIGVTALRM); 149 150 type sigset_t is private; 151 152 -- From /usr/include/signal.h /usr/include/i386-gnu/bits/sigset.h 153 function sigaddset (set : access sigset_t; sig : Signal) return int; 154 pragma Import (C, sigaddset, "sigaddset"); 155 156 function sigdelset (set : access sigset_t; sig : Signal) return int; 157 pragma Import (C, sigdelset, "sigdelset"); 158 159 function sigfillset (set : access sigset_t) return int; 160 pragma Import (C, sigfillset, "sigfillset"); 161 162 function sigismember (set : access sigset_t; sig : Signal) return int; 163 pragma Import (C, sigismember, "sigismember"); 164 165 function sigemptyset (set : access sigset_t) return int; 166 pragma Import (C, sigemptyset, "sigemptyset"); 167 168 -- sigcontext is architecture dependent, so define it private 169 type struct_sigcontext is private; 170 171 -- From /usr/include/i386-gnu/bits/sigaction.h: Note: arg. order differs 172 type struct_sigaction is record 173 sa_handler : System.Address; 174 sa_mask : sigset_t; 175 sa_flags : int; 176 end record; 177 pragma Convention (C, struct_sigaction); 178 179 type struct_sigaction_ptr is access all struct_sigaction; 180 181 -- From /usr/include/i386-gnu/bits/sigaction.h 182 SIG_BLOCK : constant := 1; 183 SIG_UNBLOCK : constant := 2; 184 SIG_SETMASK : constant := 3; 185 186 -- From /usr/include/i386-gnu/bits/signum.h 187 SIG_ERR : constant := 1; 188 SIG_DFL : constant := 0; 189 SIG_IGN : constant := 1; 190 SIG_HOLD : constant := 2; 191 192 -- From /usr/include/i386-gnu/bits/sigaction.h 193 SA_SIGINFO : constant := 16#0040#; 194 SA_ONSTACK : constant := 16#0001#; 195 196 function sigaction 197 (sig : Signal; 198 act : struct_sigaction_ptr; 199 oact : struct_sigaction_ptr) return int; 200 pragma Import (C, sigaction, "sigaction"); 201 202 ---------- 203 -- Time -- 204 ---------- 205 206 Time_Slice_Supported : constant Boolean := True; 207 -- Indicates whether time slicing is supported (i.e SCHED_RR is supported) 208 209 type timespec is private; 210 211 function nanosleep (rqtp, rmtp : access timespec) return int; 212 pragma Import (C, nanosleep, "nanosleep"); 213 214 type clockid_t is new int; 215 CLOCK_REALTIME : constant clockid_t := 0; 216 217 -- From: /usr/include/time.h 218 function clock_gettime 219 (clock_id : clockid_t; 220 tp : access timespec) 221 return int; 222 pragma Import (C, clock_gettime, "clock_gettime"); 223 224 function clock_getres 225 (clock_id : clockid_t; 226 res : access timespec) return int; 227 pragma Import (C, clock_getres, "clock_getres"); 228 229 function To_Duration (TS : timespec) return Duration; 230 pragma Inline (To_Duration); 231 232 function To_Timespec (D : Duration) return timespec; 233 pragma Inline (To_Timespec); 234 235 -- From: /usr/include/unistd.h 236 function sysconf (name : int) return long; 237 pragma Import (C, sysconf); 238 239 -- From /usr/include/i386-gnu/bits/confname.h 240 SC_CLK_TCK : constant := 2; 241 SC_NPROCESSORS_ONLN : constant := 84; 242 243 ------------------------- 244 -- Priority Scheduling -- 245 ------------------------- 246 -- From /usr/include/i386-gnu/bits/sched.h 247 248 SCHED_OTHER : constant := 0; 249 SCHED_FIFO : constant := 1; 250 SCHED_RR : constant := 2; 251 252 function To_Target_Priority 253 (Prio : System.Any_Priority) return Interfaces.C.int; 254 -- Maps System.Any_Priority to a POSIX priority. 255 256 ------------- 257 -- Process -- 258 ------------- 259 260 type pid_t is private; 261 262 -- From: /usr/include/signal.h 263 function kill (pid : pid_t; sig : Signal) return int; 264 pragma Import (C, kill, "kill"); 265 266 -- From: /usr/include/unistd.h 267 function getpid return pid_t; 268 pragma Import (C, getpid, "getpid"); 269 270 --------- 271 -- LWP -- 272 --------- 273 274 -- From: /usr/include/pthread/pthread.h 275 function lwp_self return System.Address; 276 -- lwp_self does not exist on this thread library, revert to pthread_self 277 -- which is the closest approximation (with getpid). This function is 278 -- needed to share 7staprop.adb across POSIX-like targets. 279 pragma Import (C, lwp_self, "pthread_self"); 280 281 ------------- 282 -- Threads -- 283 ------------- 284 285 type Thread_Body is access 286 function (arg : System.Address) return System.Address; 287 pragma Convention (C, Thread_Body); 288 289 function Thread_Body_Access is new 290 Unchecked_Conversion (System.Address, Thread_Body); 291 292 -- From: /usr/include/bits/pthread.h:typedef int __pthread_t; 293 -- /usr/include/pthread/pthreadtypes.h:typedef __pthread_t pthread_t; 294 type pthread_t is new unsigned_long; 295 subtype Thread_Id is pthread_t; 296 297 function To_pthread_t is new Unchecked_Conversion 298 (unsigned_long, pthread_t); 299 300 type pthread_mutex_t is limited private; 301 type pthread_rwlock_t is limited private; 302 type pthread_cond_t is limited private; 303 type pthread_attr_t is limited private; 304 type pthread_mutexattr_t is limited private; 305 type pthread_rwlockattr_t is limited private; 306 type pthread_condattr_t is limited private; 307 type pthread_key_t is private; 308 309 -- From /usr/include/pthread/pthreadtypes.h 310 PTHREAD_CREATE_DETACHED : constant := 1; 311 PTHREAD_CREATE_JOINABLE : constant := 0; 312 313 PTHREAD_SCOPE_PROCESS : constant := 1; 314 PTHREAD_SCOPE_SYSTEM : constant := 0; 315 316 ----------- 317 -- Stack -- 318 ----------- 319 320 -- From: /usr/include/i386-gnu/bits/sigstack.h 321 type stack_t is record 322 ss_sp : System.Address; 323 ss_size : size_t; 324 ss_flags : int; 325 end record; 326 pragma Convention (C, stack_t); 327 328 function sigaltstack 329 (ss : not null access stack_t; 330 oss : access stack_t) return int; 331 pragma Import (C, sigaltstack, "sigaltstack"); 332 333 Alternate_Stack : aliased System.Address; 334 -- This is a dummy definition, never used (Alternate_Stack_Size is null) 335 336 Alternate_Stack_Size : constant := 0; 337 -- No alternate signal stack is used on this platform 338 339 Stack_Base_Available : constant Boolean := False; 340 -- Indicates whether the stack base is available on this target 341 342 function Get_Stack_Base (thread : pthread_t) return Address; 343 pragma Inline (Get_Stack_Base); 344 -- returns the stack base of the specified thread. Only call this function 345 -- when Stack_Base_Available is True. 346 347 -- From: /usr/include/i386-gnu/bits/shm.h 348 function Get_Page_Size return int; 349 pragma Import (C, Get_Page_Size, "getpagesize"); 350 -- Returns the size of a page 351 352 -- From /usr/include/i386-gnu/bits/mman.h 353 PROT_NONE : constant := 0; 354 PROT_READ : constant := 4; 355 PROT_WRITE : constant := 2; 356 PROT_EXEC : constant := 1; 357 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC; 358 PROT_ON : constant := PROT_NONE; 359 PROT_OFF : constant := PROT_ALL; 360 361 -- From /usr/include/i386-gnu/bits/mman.h 362 function mprotect (addr : Address; len : size_t; prot : int) return int; 363 pragma Import (C, mprotect); 364 365 --------------------------------------- 366 -- Nonstandard Thread Initialization -- 367 --------------------------------------- 368 369 procedure pthread_init; 370 pragma Inline (pthread_init); 371 -- This is a dummy procedure to share some GNULLI files 372 373 ------------------------- 374 -- POSIX.1c Section 3 -- 375 ------------------------- 376 377 -- From: /usr/include/signal.h: 378 -- sigwait (__const sigset_t *__restrict __set, int *__restrict __sig) 379 function sigwait (set : access sigset_t; sig : access Signal) return int; 380 pragma Import (C, sigwait, "sigwait"); 381 382 -- From: /usr/include/pthread/pthread.h: 383 -- extern int pthread_kill (pthread_t thread, int signo); 384 function pthread_kill (thread : pthread_t; sig : Signal) return int; 385 pragma Import (C, pthread_kill, "pthread_kill"); 386 387 -- From: /usr/include/i386-gnu/bits/sigthread.h 388 -- extern int pthread_sigmask (int __how, __const __sigset_t *__newmask, 389 -- __sigset_t *__oldmask) __THROW; 390 function pthread_sigmask 391 (how : int; 392 set : access sigset_t; 393 oset : access sigset_t) return int; 394 pragma Import (C, pthread_sigmask, "pthread_sigmask"); 395 396 -------------------------- 397 -- POSIX.1c Section 11 -- 398 -------------------------- 399 400 -- From: /usr/include/pthread/pthread.h and 401 -- /usr/include/pthread/pthreadtypes.h 402 function pthread_mutexattr_init 403 (attr : access pthread_mutexattr_t) return int; 404 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init"); 405 406 function pthread_mutexattr_destroy 407 (attr : access pthread_mutexattr_t) return int; 408 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy"); 409 410 function pthread_mutex_init 411 (mutex : access pthread_mutex_t; 412 attr : access pthread_mutexattr_t) return int; 413 pragma Import (C, pthread_mutex_init, "pthread_mutex_init"); 414 415 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int; 416 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy"); 417 418 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int; 419 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock"); 420 421 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int; 422 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock"); 423 424 function pthread_rwlockattr_init 425 (attr : access pthread_rwlockattr_t) return int; 426 pragma Import (C, pthread_rwlockattr_init, "pthread_rwlockattr_init"); 427 428 function pthread_rwlockattr_destroy 429 (attr : access pthread_rwlockattr_t) return int; 430 pragma Import (C, pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy"); 431 PTHREAD_RWLOCK_PREFER_READER_NP : constant := 0; 432 PTHREAD_RWLOCK_PREFER_WRITER_NP : constant := 1; 433 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP : constant := 2; 434 435 function pthread_rwlockattr_setkind_np 436 (attr : access pthread_rwlockattr_t; 437 pref : int) return int; 438 pragma Import 439 (C, pthread_rwlockattr_setkind_np, "pthread_rwlockattr_setkind_np"); 440 441 function pthread_rwlock_init 442 (mutex : access pthread_rwlock_t; 443 attr : access pthread_rwlockattr_t) return int; 444 pragma Import (C, pthread_rwlock_init, "pthread_rwlock_init"); 445 446 function pthread_rwlock_destroy 447 (mutex : access pthread_rwlock_t) return int; 448 pragma Import (C, pthread_rwlock_destroy, "pthread_rwlock_destroy"); 449 450 function pthread_rwlock_rdlock (mutex : access pthread_rwlock_t) return int; 451 pragma Import (C, pthread_rwlock_rdlock, "pthread_rwlock_rdlock"); 452 453 function pthread_rwlock_wrlock (mutex : access pthread_rwlock_t) return int; 454 pragma Import (C, pthread_rwlock_wrlock, "pthread_rwlock_wrlock"); 455 456 function pthread_rwlock_unlock (mutex : access pthread_rwlock_t) return int; 457 pragma Import (C, pthread_rwlock_unlock, "pthread_rwlock_unlock"); 458 459 function pthread_condattr_init 460 (attr : access pthread_condattr_t) return int; 461 pragma Import (C, pthread_condattr_init, "pthread_condattr_init"); 462 463 function pthread_condattr_destroy 464 (attr : access pthread_condattr_t) return int; 465 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy"); 466 467 function pthread_cond_init 468 (cond : access pthread_cond_t; 469 attr : access pthread_condattr_t) return int; 470 pragma Import (C, pthread_cond_init, "pthread_cond_init"); 471 472 function pthread_cond_destroy (cond : access pthread_cond_t) return int; 473 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy"); 474 475 function pthread_cond_signal (cond : access pthread_cond_t) return int; 476 pragma Import (C, pthread_cond_signal, "pthread_cond_signal"); 477 478 function pthread_cond_wait 479 (cond : access pthread_cond_t; 480 mutex : access pthread_mutex_t) return int; 481 pragma Import (C, pthread_cond_wait, "pthread_cond_wait"); 482 483 function pthread_cond_timedwait 484 (cond : access pthread_cond_t; 485 mutex : access pthread_mutex_t; 486 abstime : access timespec) return int; 487 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait"); 488 489 Relative_Timed_Wait : constant Boolean := False; 490 -- pthread_cond_timedwait requires an absolute delay time 491 492 -------------------------- 493 -- POSIX.1c Section 13 -- 494 -------------------------- 495 -- From /usr/include/pthread/pthreadtypes.h 496 497 PTHREAD_PRIO_NONE : constant := 0; 498 PTHREAD_PRIO_PROTECT : constant := 2; 499 PTHREAD_PRIO_INHERIT : constant := 1; 500 501 -- GNU/Hurd does not support Thread Priority Protection or Thread 502 -- Priority Inheritance and lacks some pthread_mutexattr_* functions. 503 -- Replace them with dummy versions. 504 -- From: /usr/include/pthread/pthread.h 505 506 function pthread_mutexattr_setprotocol 507 (attr : access pthread_mutexattr_t; 508 protocol : int) return int; 509 pragma Import (C, pthread_mutexattr_setprotocol, 510 "pthread_mutexattr_setprotocol"); 511 512 function pthread_mutexattr_getprotocol 513 (attr : access pthread_mutexattr_t; 514 protocol : access int) return int; 515 pragma Import (C, pthread_mutexattr_getprotocol, 516 "pthread_mutexattr_getprotocol"); 517 518 function pthread_mutexattr_setprioceiling 519 (attr : access pthread_mutexattr_t; 520 prioceiling : int) return int; 521 522 function pthread_mutexattr_getprioceiling 523 (attr : access pthread_mutexattr_t; 524 prioceiling : access int) return int; 525 526 type struct_sched_param is record 527 sched_priority : int; -- scheduling priority 528 end record; 529 pragma Convention (C, struct_sched_param); 530 531 function pthread_setschedparam 532 (thread : pthread_t; 533 policy : int; 534 param : access struct_sched_param) return int; 535 536 function pthread_attr_setscope 537 (attr : access pthread_attr_t; 538 contentionscope : int) return int; 539 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope"); 540 541 function pthread_attr_getscope 542 (attr : access pthread_attr_t; 543 contentionscope : access int) return int; 544 pragma Import (C, pthread_attr_getscope, "pthread_attr_getscope"); 545 546 function pthread_attr_setinheritsched 547 (attr : access pthread_attr_t; 548 inheritsched : int) return int; 549 pragma Import (C, pthread_attr_setinheritsched, 550 "pthread_attr_setinheritsched"); 551 552 function pthread_attr_getinheritsched 553 (attr : access pthread_attr_t; 554 inheritsched : access int) return int; 555 pragma Import (C, pthread_attr_getinheritsched, 556 "pthread_attr_getinheritsched"); 557 558 function pthread_attr_setschedpolicy 559 (attr : access pthread_attr_t; 560 policy : int) return int; 561 pragma Import (C, pthread_attr_setschedpolicy, "pthread_setschedpolicy"); 562 563 function sched_yield return int; 564 pragma Import (C, sched_yield, "sched_yield"); 565 566 --------------------------- 567 -- P1003.1c - Section 16 -- 568 --------------------------- 569 570 function pthread_attr_init 571 (attributes : access pthread_attr_t) return int; 572 pragma Import (C, pthread_attr_init, "pthread_attr_init"); 573 574 function pthread_attr_destroy 575 (attributes : access pthread_attr_t) return int; 576 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy"); 577 578 function pthread_attr_setdetachstate 579 (attr : access pthread_attr_t; 580 detachstate : int) return int; 581 pragma Import 582 (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate"); 583 584 function pthread_attr_setstacksize 585 (attr : access pthread_attr_t; 586 stacksize : size_t) return int; 587 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize"); 588 589 -- From: /usr/include/pthread/pthread.h 590 function pthread_create 591 (thread : access pthread_t; 592 attributes : access pthread_attr_t; 593 start_routine : Thread_Body; 594 arg : System.Address) return int; 595 pragma Import (C, pthread_create, "pthread_create"); 596 597 procedure pthread_exit (status : System.Address); 598 pragma Import (C, pthread_exit, "pthread_exit"); 599 600 function pthread_self return pthread_t; 601 pragma Import (C, pthread_self, "pthread_self"); 602 603 -------------------------- 604 -- POSIX.1c Section 17 -- 605 -------------------------- 606 607 function pthread_setspecific 608 (key : pthread_key_t; 609 value : System.Address) return int; 610 pragma Import (C, pthread_setspecific, "pthread_setspecific"); 611 612 function pthread_getspecific (key : pthread_key_t) return System.Address; 613 pragma Import (C, pthread_getspecific, "pthread_getspecific"); 614 615 type destructor_pointer is access procedure (arg : System.Address); 616 pragma Convention (C, destructor_pointer); 617 618 function pthread_key_create 619 (key : access pthread_key_t; 620 destructor : destructor_pointer) return int; 621 pragma Import (C, pthread_key_create, "pthread_key_create"); 622 623 -- From /usr/include/i386-gnu/bits/sched.h 624 CPU_SETSIZE : constant := 1_024; 625 626 type bit_field is array (1 .. CPU_SETSIZE) of Boolean; 627 for bit_field'Size use CPU_SETSIZE; 628 pragma Pack (bit_field); 629 pragma Convention (C, bit_field); 630 631 type cpu_set_t is record 632 bits : bit_field; 633 end record; 634 pragma Convention (C, cpu_set_t); 635 636private 637 638 type sigset_t is array (1 .. 4) of unsigned; 639 640 -- In GNU/Hurd the component sa_handler turns out to 641 -- be one a union type, and the selector is a macro: 642 -- #define sa_handler __sigaction_handler.sa_handler 643 -- #define sa_sigaction __sigaction_handler.sa_sigaction 644 645 -- Should we add a signal_context type here ? 646 -- How could it be done independent of the CPU architecture ? 647 -- sigcontext type is opaque, so it is architecturally neutral. 648 -- It is always passed as an access type, so define it as an empty record 649 -- since the contents are not used anywhere. 650 type struct_sigcontext is null record; 651 pragma Convention (C, struct_sigcontext); 652 653 type pid_t is new int; 654 655 type time_t is new long; 656 657 type timespec is record 658 tv_sec : time_t; 659 tv_nsec : long; 660 end record; 661 pragma Convention (C, timespec); 662 663 -- From: /usr/include/pthread/pthreadtypes.h: 664 -- typedef struct __pthread_attr pthread_attr_t; 665 -- /usr/include/i386-gnu/bits/thread-attr.h: struct __pthread_attr... 666 -- /usr/include/pthread/pthreadtypes.h: enum __pthread_contentionscope 667 -- enum __pthread_detachstate detachstate; 668 -- enum __pthread_inheritsched inheritsched; 669 -- enum __pthread_contentionscope contentionscope; 670 -- Not used: schedpolicy : int; 671 type pthread_attr_t is record 672 schedparam : struct_sched_param; 673 stackaddr : System.Address; 674 stacksize : size_t; 675 guardsize : size_t; 676 detachstate : int; 677 inheritsched : int; 678 contentionscope : int; 679 schedpolicy : int; 680 end record; 681 pragma Convention (C, pthread_attr_t); 682 683 -- From: /usr/include/pthread/pthreadtypes.h: 684 -- typedef struct __pthread_condattr pthread_condattr_t; 685 -- From: /usr/include/i386-gnu/bits/condition-attr.h: 686 -- struct __pthread_condattr { 687 -- enum __pthread_process_shared pshared; 688 -- __Clockid_T Clock;} 689 -- From: /usr/include/pthread/pthreadtypes.h: 690 -- enum __pthread_process_shared 691 type pthread_condattr_t is record 692 pshared : int; 693 clock : clockid_t; 694 end record; 695 pragma Convention (C, pthread_condattr_t); 696 697 -- From: /usr/include/pthread/pthreadtypes.h: 698 -- typedef struct __pthread_mutexattr pthread_mutexattr_t; and 699 -- /usr/include/i386-gnu/bits/mutex-attr.h 700 -- struct __pthread_mutexattr { 701 -- int prioceiling; 702 -- enum __pthread_mutex_protocol protocol; 703 -- enum __pthread_process_shared pshared; 704 -- enum __pthread_mutex_type mutex_type;}; 705 type pthread_mutexattr_t is record 706 prioceiling : int; 707 protocol : int; 708 pshared : int; 709 mutex_type : int; 710 end record; 711 pragma Convention (C, pthread_mutexattr_t); 712 713 -- From: /usr/include/pthread/pthreadtypes.h 714 -- typedef struct __pthread_mutex pthread_mutex_t; and 715 -- /usr/include/i386-gnu/bits/mutex.h: 716 -- struct __pthread_mutex { 717 -- __pthread_spinlock_t __held; 718 -- __pthread_spinlock_t __lock; 719 -- /* in cthreads, mutex_init does not initialized the third 720 -- pointer, as such, we cannot rely on its value for anything. */ 721 -- char *cthreadscompat1; 722 -- struct __pthread *__queue; 723 -- struct __pthread_mutexattr *attr; 724 -- void *data; 725 -- /* up to this point, we are completely compatible with cthreads 726 -- and what libc expects. */ 727 -- void *owner; 728 -- unsigned locks; 729 -- /* if null then the default attributes apply. */ 730 -- }; 731 732 type pthread_mutex_t is record 733 held : int; 734 lock : int; 735 cthreadcompat : System.Address; 736 queue : System.Address; 737 attr : System.Address; 738 data : System.Address; 739 owner : System.Address; 740 locks : unsigned; 741 end record; 742 pragma Convention (C, pthread_mutex_t); 743 -- pointer needed? 744 -- type pthread_mutex_t_ptr is access pthread_mutex_t; 745 746 -- From: /usr/include/pthread/pthreadtypes.h: 747 -- typedef struct __pthread_cond pthread_cond_t; 748 -- typedef struct __pthread_condattr pthread_condattr_t; 749 -- /usr/include/i386-gnu/bits/condition.h:struct __pthread_cond{} 750 -- pthread_condattr_t: see above! 751 -- /usr/include/i386-gnu/bits/condition.h: 752 -- struct __pthread_condimpl *__impl; 753 754 type pthread_cond_t is record 755 lock : int; 756 queue : System.Address; 757 condattr : System.Address; 758 impl : System.Address; 759 data : System.Address; 760 end record; 761 pragma Convention (C, pthread_cond_t); 762 763 -- From: /usr/include/pthread/pthreadtypes.h: 764 -- typedef __pthread_key pthread_key_t; and 765 -- /usr/include/i386-gnu/bits/thread-specific.h: 766 -- typedef int __pthread_key; 767 768 type pthread_key_t is new int; 769 770 -- From: /usr/include/i386-gnu/bits/rwlock-attr.h: 771 -- struct __pthread_rwlockattr { 772 -- enum __pthread_process_shared pshared; }; 773 774 type pthread_rwlockattr_t is record 775 pshared : int; 776 end record; 777 pragma Convention (C, pthread_rwlockattr_t); 778 779 -- From: /usr/include/i386-gnu/bits/rwlock.h: 780 -- struct __pthread_rwlock { 781 -- __pthread_spinlock_t __held; 782 -- __pthread_spinlock_t __lock; 783 -- int readers; 784 -- struct __pthread *readerqueue; 785 -- struct __pthread *writerqueue; 786 -- struct __pthread_rwlockattr *__attr; 787 -- void *__data; }; 788 789 type pthread_rwlock_t is record 790 held : int; 791 lock : int; 792 readers : int; 793 readerqueue : System.Address; 794 writerqueue : System.Address; 795 attr : pthread_rwlockattr_t; 796 data : int; 797 end record; 798 pragma Convention (C, pthread_rwlock_t); 799 800end System.OS_Interface; 801