1------------------------------------------------------------------------------ 2-- -- 3-- GNAT RUN-TIME 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) 1995-2011, 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-- GNAT was originally developed by the GNAT team at New York University. -- 29-- Extensive contributions were provided by Ada Core Technologies Inc. -- 30-- -- 31------------------------------------------------------------------------------ 32 33-- This is a LynxOS (Native) 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; 42 43with Interfaces.C; 44 45package System.OS_Interface is 46 pragma Preelaborate; 47 48 pragma Linker_Options ("-mthreads"); 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 65 function errno return int; 66 pragma Import (C, errno, "__get_errno"); 67 68 EAGAIN : constant := 11; 69 EINTR : constant := 4; 70 EINVAL : constant := 22; 71 ENOMEM : constant := 12; 72 ETIMEDOUT : constant := 60; 73 74 ------------- 75 -- Signals -- 76 ------------- 77 78 Max_Interrupt : constant := 63; 79 type Signal is new int range 0 .. Max_Interrupt; 80 for Signal'Size use int'Size; 81 82 SIGHUP : constant := 1; -- hangup 83 SIGINT : constant := 2; -- interrupt (rubout) 84 SIGQUIT : constant := 3; -- quit (ASCD FS) 85 SIGILL : constant := 4; -- illegal instruction (not reset) 86 SIGTRAP : constant := 5; -- trace trap (not reset) 87 SIGBRK : constant := 6; -- break 88 SIGIOT : constant := 6; -- IOT instruction 89 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future 90 SIGCORE : constant := 7; -- kill with core dump 91 SIGEMT : constant := 7; -- EMT instruction 92 SIGFPE : constant := 8; -- floating point exception 93 SIGKILL : constant := 9; -- kill (cannot be caught or ignored) 94 SIGBUS : constant := 10; -- bus error 95 SIGSEGV : constant := 11; -- segmentation violation 96 SIGSYS : constant := 12; -- bad argument to system call 97 SIGPIPE : constant := 13; -- write on a pipe with no one to read it 98 SIGALRM : constant := 14; -- alarm clock 99 SIGTERM : constant := 15; -- software termination signal from kill 100 SIGURG : constant := 16; -- urgent condition on IO channel 101 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored) 102 SIGTSTP : constant := 18; -- user stop requested from tty 103 SIGCONT : constant := 19; -- stopped process has been continued 104 SIGCLD : constant := 20; -- alias for SIGCHLD 105 SIGCHLD : constant := 20; -- child status change 106 SIGTTIN : constant := 21; -- background tty read attempted 107 SIGTTOU : constant := 22; -- background tty write attempted 108 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias) 109 SIGPOLL : constant := 23; -- pollable event occurred 110 SIGXCPU : constant := 24; -- CPU time limit exceeded 111 SIGXFSZ : constant := 25; -- filesize limit exceeded 112 SIGVTALRM : constant := 26; -- virtual timer expired 113 SIGPROF : constant := 27; -- profiling timer expired 114 SIGWINCH : constant := 28; -- window size change 115 SIGLOST : constant := 29; -- SUN 4.1 compatibility 116 SIGUSR1 : constant := 30; -- user defined signal 1 117 SIGUSR2 : constant := 31; -- user defined signal 2 118 SIGPRIO : constant := 32; -- sent to a process with its priority or 119 -- group is changed 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, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF); 129 Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGPRIO); 130 131 type sigset_t is private; 132 133 function sigaddset (set : access sigset_t; sig : Signal) return int; 134 pragma Import (C, sigaddset, "sigaddset"); 135 136 function sigdelset (set : access sigset_t; sig : Signal) return int; 137 pragma Import (C, sigdelset, "sigdelset"); 138 139 function sigfillset (set : access sigset_t) return int; 140 pragma Import (C, sigfillset, "sigfillset"); 141 142 function sigismember (set : access sigset_t; sig : Signal) return int; 143 pragma Import (C, sigismember, "sigismember"); 144 145 function sigemptyset (set : access sigset_t) return int; 146 pragma Import (C, sigemptyset, "sigemptyset"); 147 148 type struct_sigaction is record 149 sa_handler : System.Address; 150 sa_mask : sigset_t; 151 sa_flags : int; 152 end record; 153 pragma Convention (C, struct_sigaction); 154 type struct_sigaction_ptr is access all struct_sigaction; 155 156 SA_SIGINFO : constant := 16#80#; 157 158 SIG_BLOCK : constant := 0; 159 SIG_UNBLOCK : constant := 1; 160 SIG_SETMASK : constant := 2; 161 162 SIG_DFL : constant := 0; 163 SIG_IGN : constant := 1; 164 165 function sigaction 166 (sig : Signal; 167 act : struct_sigaction_ptr; 168 oact : struct_sigaction_ptr) return int; 169 pragma Import (C, sigaction, "sigaction"); 170 171 ---------- 172 -- Time -- 173 ---------- 174 175 Time_Slice_Supported : constant Boolean := True; 176 -- Indicates whether time slicing is supported 177 178 type timespec is private; 179 180 type clockid_t is new int; 181 182 function clock_gettime 183 (clock_id : clockid_t; 184 tp : access timespec) return int; 185 pragma Inline (clock_gettime); 186 -- LynxOS has non standard clock_gettime 187 188 function To_Duration (TS : timespec) return Duration; 189 pragma Inline (To_Duration); 190 191 function To_Timespec (D : Duration) return timespec; 192 pragma Inline (To_Timespec); 193 194 type struct_timezone is record 195 tz_minuteswest : int; 196 tz_dsttime : int; 197 end record; 198 pragma Convention (C, struct_timezone); 199 type struct_timezone_ptr is access all struct_timezone; 200 201 ------------------------- 202 -- Priority Scheduling -- 203 ------------------------- 204 205 SCHED_FIFO : constant := 16#00200000#; 206 SCHED_RR : constant := 16#00100000#; 207 SCHED_OTHER : constant := 16#00400000#; 208 209 function To_Target_Priority 210 (Prio : System.Any_Priority) return Interfaces.C.int; 211 -- Maps System.Any_Priority to a POSIX priority 212 213 ------------- 214 -- Process -- 215 ------------- 216 217 type pid_t is private; 218 219 function kill (pid : pid_t; sig : Signal) return int; 220 pragma Import (C, kill, "kill"); 221 222 function getpid return pid_t; 223 pragma Import (C, getpid, "getpid"); 224 225 --------- 226 -- LWP -- 227 --------- 228 229 function lwp_self return System.Address; 230 -- lwp_self does not exist on this thread library, revert to pthread_self 231 -- which is the closest approximation (with getpid). This function is 232 -- needed to share 7staprop.adb across POSIX-like targets. 233 pragma Import (C, lwp_self, "pthread_self"); 234 235 ------------- 236 -- Threads -- 237 ------------- 238 239 type Thread_Body is access 240 function (arg : System.Address) return System.Address; 241 pragma Convention (C, Thread_Body); 242 243 function Thread_Body_Access is new 244 Ada.Unchecked_Conversion (System.Address, Thread_Body); 245 246 type pthread_t is private; 247 subtype Thread_Id is pthread_t; 248 249 type pthread_mutex_t is limited private; 250 type pthread_cond_t is limited private; 251 type st_t is limited private; 252 type pthread_attr_t is limited private; 253 type pthread_mutexattr_t is limited private; 254 type pthread_condattr_t is limited private; 255 type pthread_key_t is private; 256 257 PTHREAD_CREATE_DETACHED : constant := 0; 258 259 PTHREAD_SCOPE_PROCESS : constant := 0; 260 PTHREAD_SCOPE_SYSTEM : constant := 1; 261 262 ----------- 263 -- Stack -- 264 ----------- 265 266 Alternate_Stack_Size : constant := 0; 267 -- No alternate signal stack is used on this platform 268 269 Stack_Base_Available : constant Boolean := False; 270 -- Indicates whether the stack base is available on this target 271 272 function Get_Stack_Base (thread : pthread_t) return Address; 273 pragma Inline (Get_Stack_Base); 274 -- returns the stack base of the specified thread. 275 -- Only call this function when Stack_Base_Available is True. 276 277 function Get_Page_Size return size_t; 278 function Get_Page_Size return Address; 279 pragma Import (C, Get_Page_Size, "getpagesize"); 280 -- returns the size of a page, or 0 if this is not relevant on this 281 -- target 282 283 PROT_NONE : constant := 0; 284 PROT_READ : constant := 1; 285 PROT_WRITE : constant := 2; 286 PROT_EXEC : constant := 4; 287 PROT_USER : constant := 8; 288 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC + PROT_USER; 289 290 PROT_ON : constant := PROT_READ; 291 PROT_OFF : constant := PROT_ALL; 292 293 function mprotect (addr : Address; len : size_t; prot : int) return int; 294 pragma Import (C, mprotect); 295 296 ------------------------- 297 -- POSIX.1c Section 3 -- 298 ------------------------- 299 300 function sigwait 301 (set : access sigset_t; 302 sig : access Signal) return int; 303 pragma Inline (sigwait); 304 -- LynxOS has non standard sigwait 305 306 function pthread_kill (thread : pthread_t; sig : Signal) return int; 307 pragma Import (C, pthread_kill, "pthread_kill"); 308 309 function pthread_sigmask 310 (how : int; 311 set : access sigset_t; 312 oset : access sigset_t) return int; 313 pragma Import (C, pthread_sigmask, "sigprocmask"); 314 315 -------------------------- 316 -- POSIX.1c Section 11 -- 317 -------------------------- 318 319 function pthread_mutexattr_init 320 (attr : access pthread_mutexattr_t) return int; 321 pragma Inline (pthread_mutexattr_init); 322 -- LynxOS has a nonstandard pthread_mutexattr_init 323 324 function pthread_mutexattr_destroy 325 (attr : access pthread_mutexattr_t) return int; 326 pragma Inline (pthread_mutexattr_destroy); 327 -- Lynxos has a nonstandard pthread_mutexattr_destroy 328 329 function pthread_mutex_init 330 (mutex : access pthread_mutex_t; 331 attr : access pthread_mutexattr_t) return int; 332 pragma Inline (pthread_mutex_init); 333 -- LynxOS has a nonstandard pthread_mutex_init 334 335 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int; 336 pragma Inline (pthread_mutex_destroy); 337 -- LynxOS has a nonstandard pthread_mutex_destroy 338 339 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int; 340 pragma Inline (pthread_mutex_lock); 341 -- LynxOS has a nonstandard pthread_mutex_lock 342 343 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int; 344 pragma Inline (pthread_mutex_unlock); 345 -- LynxOS has a nonstandard pthread_mutex_unlock 346 347 function pthread_condattr_init 348 (attr : access pthread_condattr_t) return int; 349 pragma Inline (pthread_condattr_init); 350 -- LynxOS has a nonstandard pthread_condattr_init 351 352 function pthread_condattr_destroy 353 (attr : access pthread_condattr_t) return int; 354 pragma Inline (pthread_condattr_destroy); 355 -- LynxOS has a nonstandard pthread_condattr_destroy 356 357 function pthread_cond_init 358 (cond : access pthread_cond_t; 359 attr : access pthread_condattr_t) return int; 360 pragma Inline (pthread_cond_init); 361 -- LynxOS has a non standard pthread_cond_init 362 363 function pthread_cond_destroy (cond : access pthread_cond_t) return int; 364 pragma Inline (pthread_cond_destroy); 365 -- LynxOS has a nonstandard pthread_cond_destroy 366 367 function pthread_cond_signal (cond : access pthread_cond_t) return int; 368 pragma Inline (pthread_cond_signal); 369 -- LynxOS has a nonstandard pthread_cond_signal 370 371 function pthread_cond_wait 372 (cond : access pthread_cond_t; 373 mutex : access pthread_mutex_t) return int; 374 pragma Inline (pthread_cond_wait); 375 -- LynxOS has a nonstandard pthread_cond_wait 376 377 function pthread_cond_timedwait 378 (cond : access pthread_cond_t; 379 mutex : access pthread_mutex_t; 380 reltime : access timespec) return int; 381 pragma Inline (pthread_cond_timedwait); 382 -- LynxOS has a nonstandard pthread_cond_timedwait 383 384 Relative_Timed_Wait : constant Boolean := True; 385 -- pthread_cond_timedwait requires a relative delay time 386 387 -------------------------- 388 -- POSIX.1c Section 13 -- 389 -------------------------- 390 391 PTHREAD_PRIO_NONE : constant := 0; 392 PTHREAD_PRIO_INHERIT : constant := 0; 393 PTHREAD_PRIO_PROTECT : constant := 0; 394 395 type struct_sched_param is record 396 sched_priority : int; -- scheduling priority 397 end record; 398 399 function pthread_setschedparam 400 (thread : pthread_t; 401 policy : int; 402 param : access struct_sched_param) return int; 403 pragma Inline (pthread_setschedparam); 404 -- LynxOS doesn't have pthread_setschedparam. 405 -- Instead, use pthread_setscheduler 406 407 function pthread_mutexattr_setprotocol 408 (attr : access pthread_mutexattr_t; 409 protocol : int) return int; 410 pragma Inline (pthread_mutexattr_setprotocol); 411 -- LynxOS doesn't have pthread_mutexattr_setprotocol 412 413 function pthread_mutexattr_setprioceiling 414 (attr : access pthread_mutexattr_t; 415 prioceiling : int) return int; 416 pragma Inline (pthread_mutexattr_setprioceiling); 417 -- LynxOS doesn't have pthread_mutexattr_setprioceiling 418 419 function pthread_attr_setscope 420 (attr : access pthread_attr_t; 421 contentionscope : int) return int; 422 -- LynxOS doesn't have pthread_attr_setscope: all threads have system scope 423 pragma Inline (pthread_attr_setscope); 424 425 function pthread_attr_setschedpolicy 426 (attr : access pthread_attr_t; 427 policy : int) return int; 428 pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched"); 429 430 function sched_yield return int; 431 -- pragma Import (C, sched_yield, "sched_yield"); 432 pragma Inline (sched_yield); 433 434 --------------------------- 435 -- P1003.1c - Section 16 -- 436 --------------------------- 437 438 function pthread_attr_init (attributes : access pthread_attr_t) return int; 439 pragma Import (C, pthread_attr_init, "pthread_attr_create"); 440 441 function pthread_attr_destroy 442 (attributes : access pthread_attr_t) return int; 443 pragma Import (C, pthread_attr_destroy, "pthread_attr_delete"); 444 445 function pthread_attr_setdetachstate 446 (attr : access pthread_attr_t; 447 detachstate : int) return int; 448 pragma Inline (pthread_attr_setdetachstate); 449 -- LynxOS doesn't have pthread_attr_setdetachstate 450 451 function pthread_attr_setstacksize 452 (attr : access pthread_attr_t; 453 stacksize : size_t) return int; 454 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize"); 455 456 function pthread_create 457 (thread : access pthread_t; 458 attributes : access pthread_attr_t; 459 start_routine : Thread_Body; 460 arg : System.Address) return int; 461 pragma Inline (pthread_create); 462 -- LynxOS has a non standard pthread_create 463 464 function pthread_detach (thread : pthread_t) return int; 465 pragma Inline (pthread_detach); 466 467 procedure pthread_exit (status : System.Address); 468 pragma Import (C, pthread_exit, "pthread_exit"); 469 470 function pthread_self return pthread_t; 471 pragma Import (C, pthread_self, "pthread_self"); 472 473 -------------------------- 474 -- POSIX.1c Section 17 -- 475 -------------------------- 476 477 function pthread_setspecific 478 (key : pthread_key_t; 479 value : System.Address) return int; 480 pragma Inline (pthread_setspecific); 481 -- LynxOS has a non standard pthread_setspecific 482 483 function pthread_getspecific (key : pthread_key_t) return System.Address; 484 pragma Inline (pthread_getspecific); 485 -- LynxOS has a non standard pthread_getspecific 486 487 type destructor_pointer is access procedure (arg : System.Address); 488 pragma Convention (C, destructor_pointer); 489 490 function pthread_key_create 491 (key : access pthread_key_t; 492 destructor : destructor_pointer) return int; 493 pragma Inline (pthread_key_create); 494 -- LynxOS has a non standard pthread_keycreate 495 496 procedure pthread_init; 497 -- This is a dummy procedure to share some GNULLI files 498 499private 500 501 type sigbit_array is array (1 .. 2) of long; 502 type sigset_t is record 503 sa_sigbits : sigbit_array; 504 end record; 505 pragma Convention (C_Pass_By_Copy, sigset_t); 506 507 type pid_t is new long; 508 509 type time_t is new long; 510 511 type timespec is record 512 tv_sec : time_t; 513 tv_nsec : long; 514 end record; 515 pragma Convention (C, timespec); 516 517 type st_t is record 518 stksize : int; 519 prio : int; 520 inheritsched : int; 521 state : int; 522 sched : int; 523 end record; 524 pragma Convention (C, st_t); 525 526 type pthread_attr_t is record 527 st : st_t; 528 pthread_attr_scope : int; -- ignored 529 end record; 530 pragma Convention (C, pthread_attr_t); 531 532 type pthread_condattr_t is new int; 533 534 type pthread_mutexattr_t is new int; 535 536 type tid_t is new short; 537 type pthread_t is new tid_t; 538 539 type synch_ptr is access all pthread_mutex_t; 540 type pthread_mutex_t is record 541 w_count : int; 542 mut_owner : int; 543 id : unsigned; 544 next : synch_ptr; 545 end record; 546 pragma Convention (C, pthread_mutex_t); 547 548 type pthread_cond_t is new pthread_mutex_t; 549 550 type pthread_key_t is new int; 551 552end System.OS_Interface; 553