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gcc-8.2
author mir3636
date Thu, 25 Oct 2018 07:37:49 +0900
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children 1830386684a0
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111:04ced10e8804 131:84e7813d76e9
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) 1995-2018, Free Software Foundation, Inc. --
10 -- --
11 -- GNAT 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 3, or (at your option) any later ver- --
14 -- sion. GNAT 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. --
17 -- --
18 -- As a special exception under Section 7 of GPL version 3, you are granted --
19 -- additional permissions described in the GCC Runtime Library Exception, --
20 -- version 3.1, as published by the Free Software Foundation. --
21 -- --
22 -- You should have received a copy of the GNU General Public License and --
23 -- a copy of the GCC Runtime Library Exception along with this program; --
24 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
25 -- <http://www.gnu.org/licenses/>. --
26 -- --
27 -- GNARL was developed by the GNARL team at Florida State University. --
28 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
29 -- --
30 ------------------------------------------------------------------------------
31
32 -- This is a QNX/Neutrino version of this package
33
34 -- This package encapsulates all direct interfaces to OS services
35 -- that are needed by the tasking run-time (libgnarl).
36
37 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
38 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
39
40 with Ada.Unchecked_Conversion;
41 with Interfaces.C;
42 with System.OS_Constants;
43
44 package System.OS_Interface is
45 pragma Preelaborate;
46
47 subtype int is Interfaces.C.int;
48 subtype char is Interfaces.C.char;
49 subtype short is Interfaces.C.short;
50 subtype long is Interfaces.C.long;
51 subtype unsigned is Interfaces.C.unsigned;
52 subtype unsigned_short is Interfaces.C.unsigned_short;
53 subtype unsigned_long is Interfaces.C.unsigned_long;
54 subtype unsigned_char is Interfaces.C.unsigned_char;
55 subtype plain_char is Interfaces.C.plain_char;
56 subtype size_t is Interfaces.C.size_t;
57
58 -----------
59 -- Errno --
60 -----------
61
62 function errno return int;
63 pragma Import (C, errno, "__get_errno");
64
65 EPERM : constant := 1;
66 EINTR : constant := 4;
67 EAGAIN : constant := 11;
68 ENOMEM : constant := 12;
69 EINVAL : constant := 22;
70 ETIMEDOUT : constant := 260;
71
72 -------------
73 -- Signals --
74 -------------
75
76 Max_Interrupt : constant := 64;
77 type Signal is new int range 0 .. Max_Interrupt;
78 for Signal'Size use int'Size;
79
80 SIGHUP : constant := 1;
81 SIGINT : constant := 2;
82 SIGQUIT : constant := 3;
83 SIGILL : constant := 4;
84 SIGTRAP : constant := 5;
85 SIGIOT : constant := 6;
86 SIGABRT : constant := 6;
87 SIGDEADLK : constant := 7;
88 SIGFPE : constant := 8;
89 SIGKILL : constant := 9;
90 SIGBUS : constant := 10;
91 SIGSEGV : constant := 11;
92 SIGSYS : constant := 12;
93 SIGPIPE : constant := 13;
94 SIGALRM : constant := 14;
95 SIGTERM : constant := 15;
96 SIGUSR1 : constant := 16;
97 SIGUSR2 : constant := 17;
98 SIGCLD : constant := 18;
99 SIGCHLD : constant := 18;
100 SIGPWR : constant := 19;
101 SIGWINCH : constant := 20;
102 SIGURG : constant := 21;
103 SIGPOLL : constant := 22;
104 SIGIO : constant := 22;
105 SIGSTOP : constant := 23;
106 SIGTSTP : constant := 24;
107 SIGCONT : constant := 25;
108 SIGTTIN : constant := 26;
109 SIGTTOU : constant := 27;
110 SIGVTALRM : constant := 28;
111 SIGPROF : constant := 29;
112 SIGXCPU : constant := 30;
113 SIGXFSZ : constant := 31;
114
115 SIGRTMIN : constant := 41;
116 SITRTMAX : constant := 56;
117
118 SIGSELECT : constant := 57;
119 SIGPHOTON : constant := 58;
120
121 SIGADAABORT : constant := SIGABRT;
122 -- Change this to use another signal for task abort. SIGTERM might be a
123 -- 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 and IO
136 -- behaves as normal "C" applications
137
138 SIGPROF,
139 -- To avoid confusing the profiler
140
141 SIGKILL, SIGSTOP);
142 -- These two signals actually can't be masked (POSIX won't allow it)
143
144 Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP, SIGSEGV);
145
146 type sigset_t is private;
147
148 function sigaddset (set : access sigset_t; sig : Signal) return int;
149 pragma Import (C, sigaddset, "sigaddset");
150
151 function sigdelset (set : access sigset_t; sig : Signal) return int;
152 pragma Import (C, sigdelset, "sigdelset");
153
154 function sigfillset (set : access sigset_t) return int;
155 pragma Import (C, sigfillset, "sigfillset");
156
157 function sigismember (set : access sigset_t; sig : Signal) return int;
158 pragma Import (C, sigismember, "sigismember");
159
160 function sigemptyset (set : access sigset_t) return int;
161 pragma Import (C, sigemptyset, "sigemptyset");
162
163 type pad7 is array (1 .. 7) of int;
164 type siginfo_t is record
165 si_signo : int;
166 si_code : int;
167 si_errno : int;
168 X_data : pad7;
169 end record;
170 pragma Convention (C, siginfo_t);
171
172 type struct_sigaction is record
173 sa_handler : System.Address;
174 sa_flags : int;
175 sa_mask : sigset_t;
176 end record;
177 pragma Convention (C, struct_sigaction);
178
179 type struct_sigaction_ptr is access all struct_sigaction;
180
181 SIG_BLOCK : constant := 0;
182 SIG_UNBLOCK : constant := 1;
183 SIG_SETMASK : constant := 2;
184 SIG_PENDING : constant := 5;
185
186 SA_NOCLDSTOP : constant := 16#0001#;
187 SA_SIGINFO : constant := 16#0002#;
188 SA_RESETHAND : constant := 16#0004#;
189 SA_ONSTACK : constant := 16#0008#;
190 SA_NODEFER : constant := 16#0010#;
191 SA_NOCLDWAIT : constant := 16#0020#;
192
193 SS_ONSTACK : constant := 1;
194 SS_DISABLE : constant := 2;
195
196 SIG_DFL : constant := 0;
197 SIG_IGN : constant := 1;
198
199 function sigaction
200 (sig : Signal;
201 act : struct_sigaction_ptr;
202 oact : struct_sigaction_ptr) return int;
203 pragma Import (C, sigaction, "sigaction");
204
205 ----------
206 -- Time --
207 ----------
208
209 Time_Slice_Supported : constant Boolean := True;
210 -- Indicates whether time slicing is supported
211
212 type timespec is private;
213
214 type clockid_t is new int;
215
216 function clock_gettime
217 (clock_id : clockid_t; tp : access timespec) return int;
218 pragma Import (C, clock_gettime, "clock_gettime");
219
220 function clock_getres
221 (clock_id : clockid_t;
222 res : access timespec) return int;
223 pragma Import (C, clock_getres, "clock_getres");
224
225 function To_Duration (TS : timespec) return Duration;
226 pragma Inline (To_Duration);
227
228 function To_Timespec (D : Duration) return timespec;
229 pragma Inline (To_Timespec);
230
231 -------------------------
232 -- Priority Scheduling --
233 -------------------------
234
235 SCHED_FIFO : constant := 1;
236 SCHED_RR : constant := 2;
237 SCHED_OTHER : constant := 3;
238
239 function To_Target_Priority
240 (Prio : System.Any_Priority) return Interfaces.C.int
241 with Inline_Always;
242 -- Maps System.Any_Priority to a POSIX priority
243
244 -------------
245 -- Process --
246 -------------
247
248 type pid_t is private;
249
250 function kill (pid : pid_t; sig : Signal) return int;
251 pragma Import (C, kill, "kill");
252
253 function getpid return pid_t;
254 pragma Import (C, getpid, "getpid");
255
256 -------------
257 -- Threads --
258 -------------
259
260 type Thread_Body is access
261 function (arg : System.Address) return System.Address;
262 pragma Convention (C, Thread_Body);
263
264 function Thread_Body_Access is new
265 Ada.Unchecked_Conversion (System.Address, Thread_Body);
266
267 type pthread_t is new int;
268 subtype Thread_Id is pthread_t;
269
270 type pthread_mutex_t is limited private;
271 type pthread_cond_t is limited private;
272 type pthread_attr_t is limited private;
273 type pthread_mutexattr_t is limited private;
274 type pthread_condattr_t is limited private;
275 type pthread_key_t is private;
276
277 PTHREAD_CREATE_DETACHED : constant := 1;
278
279 PTHREAD_SCOPE_PROCESS : constant := 4;
280 PTHREAD_SCOPE_SYSTEM : constant := 0;
281
282 PTHREAD_INHERIT_SCHED : constant := 0;
283 PTHREAD_EXPLICIT_SCHED : constant := 2;
284
285 -- Read/Write lock not supported on Android.
286
287 subtype pthread_rwlock_t is pthread_mutex_t;
288 subtype pthread_rwlockattr_t is pthread_mutexattr_t;
289
290 -----------
291 -- Stack --
292 -----------
293
294 type stack_t is record
295 ss_sp : System.Address;
296 ss_flags : int;
297 ss_size : size_t;
298 end record;
299 pragma Convention (C, stack_t);
300
301 function sigaltstack
302 (ss : not null access stack_t;
303 oss : access stack_t) return int
304 with Inline;
305 -- Not supported on QNX
306
307 Alternate_Stack : aliased System.Address;
308 -- Dummy definition: alternate stack not available due to missing
309 -- sigaltstack in QNX
310
311 Alternate_Stack_Size : constant := 0;
312 -- This must be kept in sync with init.c:__gnat_alternate_stack
313
314 Stack_Base_Available : constant Boolean := False;
315 -- Indicates whether the stack base is available on this target
316
317 function Get_Stack_Base (thread : pthread_t) return System.Address
318 with Inline;
319 -- This is a dummy procedure to share some GNULLI files
320
321 function Get_Page_Size return int;
322 pragma Import (C, Get_Page_Size, "getpagesize");
323 -- Returns the size of a page
324
325 PROT_NONE : constant := 16#00_00#;
326 PROT_READ : constant := 16#01_00#;
327 PROT_WRITE : constant := 16#02_00#;
328 PROT_EXEC : constant := 16#04_00#;
329 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
330 PROT_ON : constant := PROT_READ;
331 PROT_OFF : constant := PROT_ALL;
332
333 function mprotect (addr : Address; len : size_t; prot : int) return int;
334 pragma Import (C, mprotect);
335
336 ---------------------------------------
337 -- Nonstandard Thread Initialization --
338 ---------------------------------------
339
340 procedure pthread_init with Inline_Always;
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_mutex_setprioceiling
385 (mutex : access pthread_mutex_t;
386 prioceiling : int;
387 old_ceiling : access int) return int;
388 pragma Import (C, pthread_mutex_setprioceiling);
389
390 function pthread_condattr_init
391 (attr : access pthread_condattr_t) return int;
392 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
393
394 function pthread_condattr_destroy
395 (attr : access pthread_condattr_t) return int;
396 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
397
398 function pthread_cond_init
399 (cond : access pthread_cond_t;
400 attr : access pthread_condattr_t) return int;
401 pragma Import (C, pthread_cond_init, "pthread_cond_init");
402
403 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
404 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
405
406 function pthread_cond_signal (cond : access pthread_cond_t) return int;
407 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
408
409 function pthread_cond_wait
410 (cond : access pthread_cond_t;
411 mutex : access pthread_mutex_t) return int;
412 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
413
414 function pthread_cond_timedwait
415 (cond : access pthread_cond_t;
416 mutex : access pthread_mutex_t;
417 abstime : access timespec) return int;
418 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
419
420 --------------------------
421 -- POSIX.1c Section 13 --
422 --------------------------
423
424 PTHREAD_PRIO_INHERIT : constant := 0;
425 PTHREAD_PRIO_NONE : constant := 1;
426 PTHREAD_PRIO_PROTECT : constant := 2;
427
428 function pthread_mutexattr_setprotocol
429 (attr : access pthread_mutexattr_t;
430 protocol : int) return int;
431 pragma Import (C, pthread_mutexattr_setprotocol);
432
433 function pthread_mutexattr_getprotocol
434 (attr : access pthread_mutexattr_t;
435 protocol : access int) return int;
436 pragma Import (C, pthread_mutexattr_getprotocol);
437
438 function pthread_mutexattr_setprioceiling
439 (attr : access pthread_mutexattr_t;
440 prioceiling : int) return int;
441 pragma Import (C, pthread_mutexattr_setprioceiling);
442
443 function pthread_mutexattr_getprioceiling
444 (attr : access pthread_mutexattr_t;
445 prioceiling : access int) return int;
446 pragma Import (C, pthread_mutexattr_getprioceiling);
447
448 function pthread_mutex_getprioceiling
449 (attr : access pthread_mutex_t;
450 prioceiling : access int) return int;
451 pragma Import (C, pthread_mutex_getprioceiling);
452
453 type pad8 is array (1 .. 8) of int;
454 pragma Convention (C, pad8);
455
456 type struct_sched_param is record
457 sched_priority : int := 0; -- scheduling priority
458 sched_curpriority : int := 0;
459 reserved : pad8 := (others => 0);
460 end record;
461 pragma Convention (C, struct_sched_param);
462
463 function pthread_setschedparam
464 (thread : pthread_t;
465 policy : int;
466 param : access struct_sched_param) return int;
467 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
468
469 function pthread_getschedparam
470 (thread : pthread_t;
471 policy : access int;
472 param : access struct_sched_param) return int;
473 pragma Import (C, pthread_getschedparam, "pthread_getschedparam");
474
475 function pthread_setschedprio
476 (thread : pthread_t;
477 priority : int) return int;
478 pragma Import (C, pthread_setschedprio);
479
480 function pthread_attr_setschedparam
481 (attr : access pthread_attr_t;
482 param : access struct_sched_param) return int;
483 pragma Import (C, pthread_attr_setschedparam);
484
485 function pthread_attr_setinheritsched
486 (attr : access pthread_attr_t;
487 inheritsched : int) return int;
488 pragma Import (C, pthread_attr_setinheritsched);
489
490 function pthread_attr_setscope
491 (attr : access pthread_attr_t;
492 scope : int) return int;
493 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
494
495 function pthread_attr_setschedpolicy
496 (attr : access pthread_attr_t;
497 policy : int) return int;
498 pragma Import
499 (C, pthread_attr_setschedpolicy, "pthread_attr_setschedpolicy");
500
501 function sched_yield return int;
502 pragma Import (C, sched_yield, "sched_yield");
503
504 ---------------------------
505 -- P1003.1c - Section 16 --
506 ---------------------------
507
508 function pthread_attr_init
509 (attributes : access pthread_attr_t) return int;
510 pragma Import (C, pthread_attr_init, "pthread_attr_init");
511
512 function pthread_attr_destroy
513 (attributes : access pthread_attr_t) return int;
514 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
515
516 function pthread_attr_setdetachstate
517 (attr : access pthread_attr_t;
518 detachstate : int) return int;
519 pragma Import (C, pthread_attr_setdetachstate);
520
521 function pthread_attr_setstacksize
522 (attr : access pthread_attr_t;
523 stacksize : size_t) return int;
524 pragma Import (C, pthread_attr_setstacksize);
525
526 function pthread_create
527 (thread : access pthread_t;
528 attributes : access pthread_attr_t;
529 start_routine : Thread_Body;
530 arg : System.Address) return int;
531 pragma Import (C, pthread_create, "pthread_create");
532
533 procedure pthread_exit (status : System.Address);
534 pragma Import (C, pthread_exit, "pthread_exit");
535
536 function pthread_self return pthread_t;
537 pragma Import (C, pthread_self, "pthread_self");
538
539 function lwp_self return System.Address;
540 pragma Import (C, lwp_self, "pthread_self");
541
542 --------------------------
543 -- POSIX.1c Section 17 --
544 --------------------------
545
546 function pthread_setspecific
547 (key : pthread_key_t;
548 value : System.Address) return int;
549 pragma Import (C, pthread_setspecific, "pthread_setspecific");
550
551 function pthread_getspecific (key : pthread_key_t) return System.Address;
552 pragma Import (C, pthread_getspecific, "pthread_getspecific");
553
554 type destructor_pointer is access procedure (arg : System.Address);
555 pragma Convention (C, destructor_pointer);
556
557 function pthread_key_create
558 (key : access pthread_key_t;
559 destructor : destructor_pointer) return int;
560 pragma Import (C, pthread_key_create, "pthread_key_create");
561
562 private
563
564 type sigset_t is array (1 .. 2) of Interfaces.Unsigned_32;
565 pragma Convention (C, sigset_t);
566
567 type pid_t is new int;
568
569 type time_t is new long;
570
571 type timespec is record
572 tv_sec : time_t;
573 tv_nsec : long;
574 end record;
575 pragma Convention (C, timespec);
576
577 type unsigned_long_long_t is mod 2 ** 64;
578 -- Local type only used to get the alignment of this type below
579
580 subtype char_array is Interfaces.C.char_array;
581
582 type pthread_attr_t is record
583 Data : char_array (1 .. OS_Constants.PTHREAD_ATTR_SIZE);
584 end record;
585 pragma Convention (C, pthread_attr_t);
586 for pthread_attr_t'Alignment use Interfaces.C.unsigned_long'Alignment;
587
588 type pthread_condattr_t is record
589 Data : char_array (1 .. OS_Constants.PTHREAD_CONDATTR_SIZE);
590 end record;
591 pragma Convention (C, pthread_condattr_t);
592 for pthread_condattr_t'Alignment use Interfaces.C.int'Alignment;
593
594 type pthread_mutexattr_t is record
595 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEXATTR_SIZE);
596 end record;
597 pragma Convention (C, pthread_mutexattr_t);
598 for pthread_mutexattr_t'Alignment use Interfaces.C.int'Alignment;
599
600 type pthread_mutex_t is record
601 Data : char_array (1 .. OS_Constants.PTHREAD_MUTEX_SIZE);
602 end record;
603 pragma Convention (C, pthread_mutex_t);
604 for pthread_mutex_t'Alignment use Interfaces.C.unsigned_long'Alignment;
605
606 type pthread_cond_t is record
607 Data : char_array (1 .. OS_Constants.PTHREAD_COND_SIZE);
608 end record;
609 pragma Convention (C, pthread_cond_t);
610 for pthread_cond_t'Alignment use unsigned_long_long_t'Alignment;
611
612 type pthread_key_t is new int;
613
614 end System.OS_Interface;