1------------------------------------------------------------------------------ 2-- -- 3-- GNAT 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) 1995-2015, 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 a GNU/Linux (GNU/LinuxThreads) version of this package 34 35-- This package encapsulates all direct interfaces to OS services 36-- that are needed by the tasking run-time (libgnarl). 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 Ada.Unchecked_Conversion; 42with Interfaces.C; 43with System.Linux; 44with System.OS_Constants; 45 46package System.OS_Interface is 47 pragma Preelaborate; 48 49 pragma Linker_Options ("-lpthread"); 50 pragma Linker_Options ("-lrt"); 51 -- Needed for clock_getres with glibc versions prior to 2.17 52 53 subtype int is Interfaces.C.int; 54 subtype char is Interfaces.C.char; 55 subtype short is Interfaces.C.short; 56 subtype long is Interfaces.C.long; 57 subtype unsigned is Interfaces.C.unsigned; 58 subtype unsigned_short is Interfaces.C.unsigned_short; 59 subtype unsigned_long is Interfaces.C.unsigned_long; 60 subtype unsigned_char is Interfaces.C.unsigned_char; 61 subtype plain_char is Interfaces.C.plain_char; 62 subtype size_t is Interfaces.C.size_t; 63 64 ----------- 65 -- Errno -- 66 ----------- 67 68 function errno return int; 69 pragma Import (C, errno, "__get_errno"); 70 71 EAGAIN : constant := System.Linux.EAGAIN; 72 EINTR : constant := System.Linux.EINTR; 73 EINVAL : constant := System.Linux.EINVAL; 74 ENOMEM : constant := System.Linux.ENOMEM; 75 EPERM : constant := System.Linux.EPERM; 76 ETIMEDOUT : constant := System.Linux.ETIMEDOUT; 77 78 ------------- 79 -- Signals -- 80 ------------- 81 82 Max_Interrupt : constant := 63; 83 type Signal is new int range 0 .. Max_Interrupt; 84 for Signal'Size use int'Size; 85 86 SIGHUP : constant := System.Linux.SIGHUP; 87 SIGINT : constant := System.Linux.SIGINT; 88 SIGQUIT : constant := System.Linux.SIGQUIT; 89 SIGILL : constant := System.Linux.SIGILL; 90 SIGTRAP : constant := System.Linux.SIGTRAP; 91 SIGIOT : constant := System.Linux.SIGIOT; 92 SIGABRT : constant := System.Linux.SIGABRT; 93 SIGFPE : constant := System.Linux.SIGFPE; 94 SIGKILL : constant := System.Linux.SIGKILL; 95 SIGBUS : constant := System.Linux.SIGBUS; 96 SIGSEGV : constant := System.Linux.SIGSEGV; 97 SIGPIPE : constant := System.Linux.SIGPIPE; 98 SIGALRM : constant := System.Linux.SIGALRM; 99 SIGTERM : constant := System.Linux.SIGTERM; 100 SIGUSR1 : constant := System.Linux.SIGUSR1; 101 SIGUSR2 : constant := System.Linux.SIGUSR2; 102 SIGCLD : constant := System.Linux.SIGCLD; 103 SIGCHLD : constant := System.Linux.SIGCHLD; 104 SIGPWR : constant := System.Linux.SIGPWR; 105 SIGWINCH : constant := System.Linux.SIGWINCH; 106 SIGURG : constant := System.Linux.SIGURG; 107 SIGPOLL : constant := System.Linux.SIGPOLL; 108 SIGIO : constant := System.Linux.SIGIO; 109 SIGLOST : constant := System.Linux.SIGLOST; 110 SIGSTOP : constant := System.Linux.SIGSTOP; 111 SIGTSTP : constant := System.Linux.SIGTSTP; 112 SIGCONT : constant := System.Linux.SIGCONT; 113 SIGTTIN : constant := System.Linux.SIGTTIN; 114 SIGTTOU : constant := System.Linux.SIGTTOU; 115 SIGVTALRM : constant := System.Linux.SIGVTALRM; 116 SIGPROF : constant := System.Linux.SIGPROF; 117 SIGXCPU : constant := System.Linux.SIGXCPU; 118 SIGXFSZ : constant := System.Linux.SIGXFSZ; 119 SIGUNUSED : constant := System.Linux.SIGUNUSED; 120 SIGSTKFLT : constant := System.Linux.SIGSTKFLT; 121 SIGLTHRRES : constant := System.Linux.SIGLTHRRES; 122 SIGLTHRCAN : constant := System.Linux.SIGLTHRCAN; 123 SIGLTHRDBG : constant := System.Linux.SIGLTHRDBG; 124 125 SIGADAABORT : constant := SIGABRT; 126 -- Change this to use another signal for task abort. SIGTERM might be a 127 -- good one. 128 129 type Signal_Set is array (Natural range <>) of Signal; 130 131 Unmasked : constant Signal_Set := ( 132 SIGTRAP, 133 -- To enable debugging on multithreaded applications, mark SIGTRAP to 134 -- be kept unmasked. 135 136 SIGBUS, 137 138 SIGTTIN, SIGTTOU, SIGTSTP, 139 -- Keep these three signals unmasked so that background processes and IO 140 -- behaves as normal "C" applications 141 142 SIGPROF, 143 -- To avoid confusing the profiler 144 145 SIGKILL, SIGSTOP, 146 -- These two signals actually can't be masked (POSIX won't allow it) 147 148 SIGLTHRRES, SIGLTHRCAN, SIGLTHRDBG); 149 -- These three signals are used by GNU/LinuxThreads starting from glibc 150 -- 2.1 (future 2.2). 151 152 Reserved : constant Signal_Set := (SIGVTALRM, SIGUNUSED); 153 -- Not clear why these two signals are reserved. Perhaps they are not 154 -- supported by this version of GNU/Linux ??? 155 156 type sigset_t is private; 157 158 function sigaddset (set : access sigset_t; sig : Signal) return int; 159 pragma Import (C, sigaddset, "sigaddset"); 160 161 function sigdelset (set : access sigset_t; sig : Signal) return int; 162 pragma Import (C, sigdelset, "sigdelset"); 163 164 function sigfillset (set : access sigset_t) return int; 165 pragma Import (C, sigfillset, "sigfillset"); 166 167 function sigismember (set : access sigset_t; sig : Signal) return int; 168 pragma Import (C, sigismember, "sigismember"); 169 170 function sigemptyset (set : access sigset_t) return int; 171 pragma Import (C, sigemptyset, "sigemptyset"); 172 173 type union_type_3 is new String (1 .. 116); 174 type siginfo_t is record 175 si_signo : int; 176 si_code : int; 177 si_errno : int; 178 X_data : union_type_3; 179 end record; 180 pragma Convention (C, siginfo_t); 181 182 type struct_sigaction is record 183 sa_handler : System.Address; 184 sa_mask : sigset_t; 185 sa_flags : Interfaces.C.unsigned_long; 186 sa_restorer : System.Address; 187 end record; 188 pragma Convention (C, struct_sigaction); 189 190 type struct_sigaction_ptr is access all struct_sigaction; 191 192 type Machine_State is record 193 eip : unsigned_long; 194 ebx : unsigned_long; 195 esp : unsigned_long; 196 ebp : unsigned_long; 197 esi : unsigned_long; 198 edi : unsigned_long; 199 end record; 200 type Machine_State_Ptr is access all Machine_State; 201 202 SA_SIGINFO : constant := System.Linux.SA_SIGINFO; 203 SA_ONSTACK : constant := System.Linux.SA_ONSTACK; 204 205 SIG_BLOCK : constant := 0; 206 SIG_UNBLOCK : constant := 1; 207 SIG_SETMASK : constant := 2; 208 209 SIG_DFL : constant := 0; 210 SIG_IGN : constant := 1; 211 212 function sigaction 213 (sig : Signal; 214 act : struct_sigaction_ptr; 215 oact : struct_sigaction_ptr) return int; 216 pragma Import (C, sigaction, "sigaction"); 217 218 ---------- 219 -- Time -- 220 ---------- 221 222 subtype time_t is System.Linux.time_t; 223 subtype timespec is System.Linux.timespec; 224 subtype timeval is System.Linux.timeval; 225 subtype clockid_t is System.Linux.clockid_t; 226 227 function clock_gettime 228 (clock_id : clockid_t; tp : access timespec) return int; 229 pragma Import (C, clock_gettime, "clock_gettime"); 230 231 function clock_getres 232 (clock_id : clockid_t; 233 res : access timespec) return int; 234 pragma Import (C, clock_getres, "clock_getres"); 235 236 function To_Duration (TS : timespec) return Duration; 237 pragma Inline (To_Duration); 238 239 function To_Timespec (D : Duration) return timespec; 240 pragma Inline (To_Timespec); 241 242 function sysconf (name : int) return long; 243 pragma Import (C, sysconf); 244 245 SC_CLK_TCK : constant := 2; 246 SC_NPROCESSORS_ONLN : constant := 84; 247 248 ------------------------- 249 -- Priority Scheduling -- 250 ------------------------- 251 252 SCHED_OTHER : constant := 0; 253 SCHED_FIFO : constant := 1; 254 SCHED_RR : constant := 2; 255 256 function To_Target_Priority 257 (Prio : System.Any_Priority) return Interfaces.C.int; 258 -- Maps System.Any_Priority to a POSIX priority 259 260 ------------- 261 -- Process -- 262 ------------- 263 264 type pid_t is private; 265 266 function kill (pid : pid_t; sig : Signal) return int; 267 pragma Import (C, kill, "kill"); 268 269 function getpid return pid_t; 270 pragma Import (C, getpid, "getpid"); 271 272 PR_SET_NAME : constant := 15; 273 274 function prctl 275 (option : int; 276 arg2, arg3, arg4, arg5 : unsigned_long := 0) return int; 277 pragma Import (C, prctl); 278 279 ------------- 280 -- Threads -- 281 ------------- 282 283 type Thread_Body is access 284 function (arg : System.Address) return System.Address; 285 pragma Convention (C, Thread_Body); 286 287 function Thread_Body_Access is new 288 Ada.Unchecked_Conversion (System.Address, Thread_Body); 289 290 type pthread_t is new unsigned_long; 291 subtype Thread_Id is pthread_t; 292 293 function To_pthread_t is 294 new Ada.Unchecked_Conversion (unsigned_long, pthread_t); 295 296 type pthread_mutex_t is limited private; 297 type pthread_rwlock_t is limited private; 298 type pthread_cond_t is limited private; 299 type pthread_attr_t is limited private; 300 type pthread_mutexattr_t is limited private; 301 type pthread_rwlockattr_t is limited private; 302 type pthread_condattr_t is limited private; 303 type pthread_key_t is private; 304 305 PTHREAD_CREATE_DETACHED : constant := 1; 306 307 ----------- 308 -- Stack -- 309 ----------- 310 311 type stack_t is record 312 ss_sp : System.Address; 313 ss_flags : int; 314 ss_size : size_t; 315 end record; 316 pragma Convention (C, stack_t); 317 318 function sigaltstack 319 (ss : not null access stack_t; 320 oss : access stack_t) return int; 321 pragma Import (C, sigaltstack, "sigaltstack"); 322 323 Alternate_Stack : aliased System.Address; 324 pragma Import (C, Alternate_Stack, "__gnat_alternate_stack"); 325 -- The alternate signal stack for stack overflows 326 327 Alternate_Stack_Size : constant := 16 * 1024; 328 -- This must be in keeping with init.c:__gnat_alternate_stack 329 330 function Get_Stack_Base (thread : pthread_t) return Address; 331 pragma Inline (Get_Stack_Base); 332 -- This is a dummy procedure to share some GNULLI files 333 334 --------------------------------------- 335 -- Nonstandard Thread Initialization -- 336 --------------------------------------- 337 338 procedure pthread_init; 339 pragma Inline (pthread_init); 340 -- This is a dummy procedure to share some GNULLI files 341 342 ------------------------- 343 -- POSIX.1c Section 3 -- 344 ------------------------- 345 346 function sigwait (set : access sigset_t; sig : access Signal) return int; 347 pragma Import (C, sigwait, "sigwait"); 348 349 function pthread_kill (thread : pthread_t; sig : Signal) return int; 350 pragma Import (C, pthread_kill, "pthread_kill"); 351 352 function pthread_sigmask 353 (how : int; 354 set : access sigset_t; 355 oset : access sigset_t) return int; 356 pragma Import (C, pthread_sigmask, "pthread_sigmask"); 357 358 -------------------------- 359 -- POSIX.1c Section 11 -- 360 -------------------------- 361 362 function pthread_mutexattr_init 363 (attr : access pthread_mutexattr_t) return int; 364 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init"); 365 366 function pthread_mutexattr_destroy 367 (attr : access pthread_mutexattr_t) return int; 368 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy"); 369 370 function pthread_mutex_init 371 (mutex : access pthread_mutex_t; 372 attr : access pthread_mutexattr_t) return int; 373 pragma Import (C, pthread_mutex_init, "pthread_mutex_init"); 374 375 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int; 376 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy"); 377 378 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int; 379 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock"); 380 381 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int; 382 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock"); 383 384 function pthread_rwlockattr_init 385 (attr : access pthread_rwlockattr_t) return int; 386 pragma Import (C, pthread_rwlockattr_init, "pthread_rwlockattr_init"); 387 388 function pthread_rwlockattr_destroy 389 (attr : access pthread_rwlockattr_t) return int; 390 pragma Import (C, pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy"); 391 392 PTHREAD_RWLOCK_PREFER_READER_NP : constant := 0; 393 PTHREAD_RWLOCK_PREFER_WRITER_NP : constant := 1; 394 PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP : constant := 2; 395 396 function pthread_rwlockattr_setkind_np 397 (attr : access pthread_rwlockattr_t; 398 pref : int) return int; 399 pragma Import 400 (C, pthread_rwlockattr_setkind_np, "pthread_rwlockattr_setkind_np"); 401 402 function pthread_rwlock_init 403 (mutex : access pthread_rwlock_t; 404 attr : access pthread_rwlockattr_t) return int; 405 pragma Import (C, pthread_rwlock_init, "pthread_rwlock_init"); 406 407 function pthread_rwlock_destroy 408 (mutex : access pthread_rwlock_t) return int; 409 pragma Import (C, pthread_rwlock_destroy, "pthread_rwlock_destroy"); 410 411 function pthread_rwlock_rdlock (mutex : access pthread_rwlock_t) return int; 412 pragma Import (C, pthread_rwlock_rdlock, "pthread_rwlock_rdlock"); 413 414 function pthread_rwlock_wrlock (mutex : access pthread_rwlock_t) return int; 415 pragma Import (C, pthread_rwlock_wrlock, "pthread_rwlock_wrlock"); 416 417 function pthread_rwlock_unlock (mutex : access pthread_rwlock_t) return int; 418 pragma Import (C, pthread_rwlock_unlock, "pthread_rwlock_unlock"); 419 420 function pthread_condattr_init 421 (attr : access pthread_condattr_t) return int; 422 pragma Import (C, pthread_condattr_init, "pthread_condattr_init"); 423 424 function pthread_condattr_destroy 425 (attr : access pthread_condattr_t) return int; 426 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy"); 427 428 function pthread_cond_init 429 (cond : access pthread_cond_t; 430 attr : access pthread_condattr_t) return int; 431 pragma Import (C, pthread_cond_init, "pthread_cond_init"); 432 433 function pthread_cond_destroy (cond : access pthread_cond_t) return int; 434 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy"); 435 436 function pthread_cond_signal (cond : access pthread_cond_t) return int; 437 pragma Import (C, pthread_cond_signal, "pthread_cond_signal"); 438 439 function pthread_cond_wait 440 (cond : access pthread_cond_t; 441 mutex : access pthread_mutex_t) return int; 442 pragma Import (C, pthread_cond_wait, "pthread_cond_wait"); 443 444 function pthread_cond_timedwait 445 (cond : access pthread_cond_t; 446 mutex : access pthread_mutex_t; 447 abstime : access timespec) return int; 448 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait"); 449 450 -------------------------- 451 -- POSIX.1c Section 13 -- 452 -------------------------- 453 454 type struct_sched_param is record 455 sched_priority : int; -- scheduling priority 456 end record; 457 pragma Convention (C, struct_sched_param); 458 459 function pthread_setschedparam 460 (thread : pthread_t; 461 policy : int; 462 param : access struct_sched_param) return int; 463 pragma Import (C, pthread_setschedparam, "pthread_setschedparam"); 464 465 function pthread_attr_setschedpolicy 466 (attr : access pthread_attr_t; 467 policy : int) return int; 468 pragma Import 469 (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy"); 470 471 function sched_yield return int; 472 pragma Import (C, sched_yield, "sched_yield"); 473 474 --------------------------- 475 -- P1003.1c - Section 16 -- 476 --------------------------- 477 478 function pthread_attr_init 479 (attributes : access pthread_attr_t) return int; 480 pragma Import (C, pthread_attr_init, "pthread_attr_init"); 481 482 function pthread_attr_destroy 483 (attributes : access pthread_attr_t) return int; 484 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy"); 485 486 function pthread_attr_setdetachstate 487 (attr : access pthread_attr_t; 488 detachstate : int) return int; 489 pragma Import 490 (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate"); 491 492 function pthread_attr_setstacksize 493 (attr : access pthread_attr_t; 494 stacksize : size_t) return int; 495 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize"); 496 497 function pthread_create 498 (thread : access pthread_t; 499 attributes : access pthread_attr_t; 500 start_routine : Thread_Body; 501 arg : System.Address) return int; 502 pragma Import (C, pthread_create, "pthread_create"); 503 504 procedure pthread_exit (status : System.Address); 505 pragma Import (C, pthread_exit, "pthread_exit"); 506 507 function pthread_self return pthread_t; 508 pragma Import (C, pthread_self, "pthread_self"); 509 510 function lwp_self return System.Address; 511 pragma Import (C, lwp_self, "__gnat_lwp_self"); 512 513 -------------------------- 514 -- POSIX.1c Section 17 -- 515 -------------------------- 516 517 function pthread_setspecific 518 (key : pthread_key_t; 519 value : System.Address) return int; 520 pragma Import (C, pthread_setspecific, "pthread_setspecific"); 521 522 function pthread_getspecific (key : pthread_key_t) return System.Address; 523 pragma Import (C, pthread_getspecific, "pthread_getspecific"); 524 525 type destructor_pointer is access procedure (arg : System.Address); 526 pragma Convention (C, destructor_pointer); 527 528 function pthread_key_create 529 (key : access pthread_key_t; 530 destructor : destructor_pointer) return int; 531 pragma Import (C, pthread_key_create, "pthread_key_create"); 532 533 ---------------- 534 -- Extensions -- 535 ---------------- 536 537 CPU_SETSIZE : constant := 1_024; 538 -- Size of the cpu_set_t mask on most linux systems (SUSE 11 uses 4_096). 539 -- This is kept for backward compatibility (System.Task_Info uses it), but 540 -- the run-time library does no longer rely on static masks, using 541 -- dynamically allocated masks instead. 542 543 type bit_field is array (1 .. CPU_SETSIZE) of Boolean; 544 for bit_field'Size use CPU_SETSIZE; 545 pragma Pack (bit_field); 546 pragma Convention (C, bit_field); 547 548 type cpu_set_t is record 549 bits : bit_field; 550 end record; 551 pragma Convention (C, cpu_set_t); 552 553 type cpu_set_t_ptr is access all cpu_set_t; 554 -- In the run-time library we use this pointer because the size of type 555 -- cpu_set_t varies depending on the glibc version. Hence, objects of type 556 -- cpu_set_t are allocated dynamically using the number of processors 557 -- available in the target machine (value obtained at execution time). 558 559 function CPU_ALLOC (count : size_t) return cpu_set_t_ptr; 560 pragma Import (C, CPU_ALLOC, "__gnat_cpu_alloc"); 561 -- Wrapper around the CPU_ALLOC C macro 562 563 function CPU_ALLOC_SIZE (count : size_t) return size_t; 564 pragma Import (C, CPU_ALLOC_SIZE, "__gnat_cpu_alloc_size"); 565 -- Wrapper around the CPU_ALLOC_SIZE C macro 566 567 procedure CPU_FREE (cpuset : cpu_set_t_ptr); 568 pragma Import (C, CPU_FREE, "__gnat_cpu_free"); 569 -- Wrapper around the CPU_FREE C macro 570 571 procedure CPU_ZERO (count : size_t; cpuset : cpu_set_t_ptr); 572 pragma Import (C, CPU_ZERO, "__gnat_cpu_zero"); 573 -- Wrapper around the CPU_ZERO_S C macro 574 575 procedure CPU_SET (cpu : int; count : size_t; cpuset : cpu_set_t_ptr); 576 pragma Import (C, CPU_SET, "__gnat_cpu_set"); 577 -- Wrapper around the CPU_SET_S C macro 578 579 function pthread_setaffinity_np 580 (thread : pthread_t; 581 cpusetsize : size_t; 582 cpuset : cpu_set_t_ptr) return int; 583 pragma Import (C, pthread_setaffinity_np, "pthread_setaffinity_np"); 584 pragma Weak_External (pthread_setaffinity_np); 585 -- Use a weak symbol because this function may be available or not, 586 -- depending on the version of the system. 587 588 function pthread_attr_setaffinity_np 589 (attr : access pthread_attr_t; 590 cpusetsize : size_t; 591 cpuset : cpu_set_t_ptr) return int; 592 pragma Import (C, pthread_attr_setaffinity_np, 593 "pthread_attr_setaffinity_np"); 594 pragma Weak_External (pthread_attr_setaffinity_np); 595 -- Use a weak symbol because this function may be available or not, 596 -- depending on the version of the system. 597 598private 599 600 type sigset_t is 601 array (0 .. OS_Constants.SIZEOF_sigset - 1) of unsigned_char; 602 pragma Convention (C, sigset_t); 603 for sigset_t'Alignment use Interfaces.C.unsigned_long'Alignment; 604 605 pragma Warnings (Off); 606 for struct_sigaction use record 607 sa_handler at Linux.sa_handler_pos range 0 .. Standard'Address_Size - 1; 608 sa_mask at Linux.sa_mask_pos range 0 .. 1023; 609 sa_flags at Linux.sa_flags_pos 610 range 0 .. Interfaces.C.unsigned_long'Size - 1; 611 end record; 612 -- We intentionally leave sa_restorer unspecified and let the compiler 613 -- append it after the last field, so disable corresponding warning. 614 pragma Warnings (On); 615 616 type pid_t is new int; 617 618 subtype char_array is Interfaces.C.char_array; 619 620 type pthread_attr_t is record 621 Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE); 622 end record; 623 pragma Convention (C, pthread_attr_t); 624 for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment; 625 626 type pthread_condattr_t is record 627 Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE); 628 end record; 629 pragma Convention (C, pthread_condattr_t); 630 for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment; 631 632 type pthread_mutexattr_t is record 633 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE); 634 end record; 635 pragma Convention (C, pthread_mutexattr_t); 636 for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment; 637 638 type pthread_mutex_t is record 639 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE); 640 end record; 641 pragma Convention (C, pthread_mutex_t); 642 for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment; 643 644 type pthread_rwlockattr_t is record 645 Data : char_array (1 .. OS_Constants.PTHREAD_RWLOCKATTR_SIZE); 646 end record; 647 pragma Convention (C, pthread_rwlockattr_t); 648 for pthread_rwlockattr_t'Alignment use Interfaces.C.unsigned_long'Alignment; 649 650 type pthread_rwlock_t is record 651 Data : char_array (1 .. OS_Constants.PTHREAD_RWLOCK_SIZE); 652 end record; 653 pragma Convention (C, pthread_rwlock_t); 654 for pthread_rwlock_t'Alignment use Interfaces.C.unsigned_long'Alignment; 655 656 type pthread_cond_t is record 657 Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE); 658 end record; 659 pragma Convention (C, pthread_cond_t); 660 for pthread_cond_t'Alignment use Interfaces.Unsigned_64'Alignment; 661 662 type pthread_key_t is new unsigned; 663 664end System.OS_Interface; 665