1 ------------------------------------------------------------------------------
3 -- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . O S _ I N T E R F A C E --
9 -- Copyright (C) 1991-1994, Florida State University --
10 -- Copyright (C) 1995-2008, Free Software Foundation, Inc. --
12 -- GNARL 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 2, or (at your option) any later ver- --
15 -- sion. GNARL 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. See the GNU General Public License --
18 -- for more details. You should have received a copy of the GNU General --
19 -- Public License distributed with GNARL; see file COPYING. If not, write --
20 -- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
21 -- Boston, MA 02110-1301, USA. --
23 -- As a special exception, if other files instantiate generics from this --
24 -- unit, or you link this unit with other files to produce an executable, --
25 -- this unit does not by itself cause the resulting executable to be --
26 -- covered by the GNU General Public License. This exception does not --
27 -- however invalidate any other reasons why the executable file might be --
28 -- covered by the GNU Public License. --
30 -- GNARL was developed by the GNARL team at Florida State University. --
31 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
33 ------------------------------------------------------------------------------
35 -- This is the Tru64 version of this package
37 -- This package encapsulates all direct interfaces to OS services
38 -- that are needed by the tasking run-time (libgnarl).
40 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
41 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
45 with Ada.Unchecked_Conversion;
47 package System.OS_Interface is
50 pragma Linker_Options ("-lpthread");
51 pragma Linker_Options ("-lmach");
52 pragma Linker_Options ("-lexc");
53 pragma Linker_Options ("-lrt");
55 subtype int is Interfaces.C.int;
56 subtype short is Interfaces.C.short;
57 subtype long is Interfaces.C.long;
58 subtype unsigned is Interfaces.C.unsigned;
59 subtype unsigned_short is Interfaces.C.unsigned_short;
60 subtype unsigned_long is Interfaces.C.unsigned_long;
61 subtype unsigned_char is Interfaces.C.unsigned_char;
62 subtype plain_char is Interfaces.C.plain_char;
63 subtype size_t is Interfaces.C.size_t;
64 subtype char_array is Interfaces.C.char_array;
70 function errno return int;
71 pragma Import (C, errno, "_Geterrno");
73 EAGAIN : constant := 35;
74 EINTR : constant := 4;
75 EINVAL : constant := 22;
76 ENOMEM : constant := 12;
77 ETIMEDOUT : constant := 60;
83 Max_Interrupt : constant := 48;
84 type Signal is new int range 0 .. Max_Interrupt;
85 for Signal'Size use int'Size;
87 SIGHUP : constant := 1; -- hangup
88 SIGINT : constant := 2; -- interrupt (rubout)
89 SIGQUIT : constant := 3; -- quit (ASCD FS)
90 SIGILL : constant := 4; -- illegal instruction (not reset)
91 SIGTRAP : constant := 5; -- trace trap (not reset)
92 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
93 SIGIOT : constant := 6; -- abort (terminate) process
94 SIGLOST : constant := 6; -- old BSD signal ??
95 SIGEMT : constant := 7; -- EMT instruction
96 SIGFPE : constant := 8; -- floating point exception
97 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
98 SIGBUS : constant := 10; -- bus error
99 SIGSEGV : constant := 11; -- segmentation violation
100 SIGSYS : constant := 12; -- bad argument to system call
101 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
102 SIGALRM : constant := 14; -- alarm clock
103 SIGTERM : constant := 15; -- software termination signal from kill
104 SIGURG : constant := 16; -- urgent condition on IO channel
105 SIGIOINT : constant := 16; -- printer to backend error signal
106 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
107 SIGTSTP : constant := 18; -- user stop requested from tty
108 SIGCONT : constant := 19; -- stopped process has been continued
109 SIGCHLD : constant := 20; -- child status change
110 SIGTTIN : constant := 21; -- background tty read attempted
111 SIGTTOU : constant := 22; -- background tty write attempted
112 SIGPOLL : constant := 23; -- I/O possible, or completed
113 SIGIO : constant := 23; -- STREAMS version of SIGPOLL
114 SIGAIO : constant := 23; -- base lan i/o
115 SIGPTY : constant := 23; -- pty i/o
116 SIGXCPU : constant := 24; -- CPU time limit exceeded
117 SIGXFSZ : constant := 25; -- filesize limit exceeded
118 SIGVTALRM : constant := 26; -- virtual timer expired
119 SIGPROF : constant := 27; -- profiling timer expired
120 SIGWINCH : constant := 28; -- window size change
121 SIGINFO : constant := 29; -- information request
122 SIGPWR : constant := 29; -- Power Fail/Restart -- SVID3/SVR4
123 SIGUSR1 : constant := 30; -- user defined signal 1
124 SIGUSR2 : constant := 31; -- user defined signal 2
125 SIGRESV : constant := 32; -- reserved by Digital for future use
127 SIGADAABORT : constant := SIGABRT;
129 type Signal_Set is array (Natural range <>) of Signal;
131 Unmasked : constant Signal_Set := (0 .. 0 => SIGTRAP);
132 Reserved : constant Signal_Set := (SIGALRM, SIGABRT, SIGKILL, SIGSTOP);
134 type sigset_t is private;
136 function sigaddset (set : access sigset_t; sig : Signal) return int;
137 pragma Import (C, sigaddset);
139 function sigdelset (set : access sigset_t; sig : Signal) return int;
140 pragma Import (C, sigdelset);
142 function sigfillset (set : access sigset_t) return int;
143 pragma Import (C, sigfillset);
145 function sigismember (set : access sigset_t; sig : Signal) return int;
146 pragma Import (C, sigismember);
148 function sigemptyset (set : access sigset_t) return int;
149 pragma Import (C, sigemptyset);
151 type union_type_3 is new String (1 .. 116);
152 type siginfo_t is record
156 X_data : union_type_3;
158 for siginfo_t'Size use 8 * 128;
159 pragma Convention (C, siginfo_t);
161 type struct_sigaction is record
162 sa_handler : System.Address;
167 pragma Convention (C, struct_sigaction);
168 type struct_sigaction_ptr is access all struct_sigaction;
170 SIG_BLOCK : constant := 1;
171 SIG_UNBLOCK : constant := 2;
172 SIG_SETMASK : constant := 3;
174 SIG_DFL : constant := 0;
175 SIG_IGN : constant := 1;
177 SA_NODEFER : constant := 8;
178 SA_SIGINFO : constant := 16#40#;
182 act : struct_sigaction_ptr;
183 oact : struct_sigaction_ptr) return int;
184 pragma Import (C, sigaction);
190 type timespec is private;
192 function nanosleep (rqtp, rmtp : access timespec) return int;
193 pragma Import (C, nanosleep);
195 type clockid_t is private;
197 CLOCK_REALTIME : constant clockid_t;
199 function clock_gettime
200 (clock_id : clockid_t;
201 tp : access timespec) return int;
202 pragma Import (C, clock_gettime);
204 function To_Duration (TS : timespec) return Duration;
205 pragma Inline (To_Duration);
207 function To_Timespec (D : Duration) return timespec;
208 pragma Inline (To_Timespec);
210 type struct_timezone is record
211 tz_minuteswest : int;
214 pragma Convention (C, struct_timezone);
216 -------------------------
217 -- Priority Scheduling --
218 -------------------------
220 SCHED_FIFO : constant := 1;
221 SCHED_RR : constant := 2;
222 SCHED_OTHER : constant := 3;
223 SCHED_LFI : constant := 5;
229 type pid_t is private;
231 function kill (pid : pid_t; sig : Signal) return int;
232 pragma Import (C, kill);
234 function getpid return pid_t;
235 pragma Import (C, getpid);
237 BIND_NO_INHERIT : constant := 1;
241 cpu_mask : unsigned_long;
242 flag : unsigned_long := BIND_NO_INHERIT) return int;
243 pragma Import (C, bind_to_cpu);
249 type Thread_Body is access
250 function (arg : System.Address) return System.Address;
251 pragma Convention (C, Thread_Body);
253 function Thread_Body_Access is new
254 Ada.Unchecked_Conversion (System.Address, Thread_Body);
256 type pthread_t is private;
257 subtype Thread_Id is pthread_t;
259 type pthread_mutex_t is limited private;
260 type pthread_cond_t is limited private;
261 type pthread_attr_t is limited private;
262 type pthread_mutexattr_t is limited private;
263 type pthread_condattr_t is limited private;
264 type pthread_key_t is private;
266 PTHREAD_CREATE_DETACHED : constant := 1;
268 PTHREAD_SCOPE_PROCESS : constant := 0;
269 PTHREAD_SCOPE_SYSTEM : constant := 1;
271 PTHREAD_EXPLICIT_SCHED : constant := 1;
277 Stack_Base_Available : constant Boolean := False;
278 -- Indicates if the stack base is available on this target
280 function Get_Stack_Base (thread : pthread_t) return Address;
281 pragma Inline (Get_Stack_Base);
282 -- Returns the stack base of the specified thread. Only call this function
283 -- when Stack_Base_Available is True.
285 function Get_Page_Size return size_t;
286 function Get_Page_Size return Address;
287 pragma Import (C, Get_Page_Size, "getpagesize");
288 -- Returns the size of a page, or 0 if this is not relevant on this target
290 PROT_NONE : constant := 0;
291 PROT_READ : constant := 1;
292 PROT_WRITE : constant := 2;
293 PROT_EXEC : constant := 4;
294 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
296 PROT_ON : constant := PROT_READ;
297 PROT_OFF : constant := PROT_ALL;
299 function mprotect (addr : Address; len : size_t; prot : int) return int;
300 pragma Import (C, mprotect);
302 procedure Hide_Unhide_Yellow_Zone (Hide : Boolean);
303 -- Every thread except the initial one features an overflow warning area
304 -- (called the Yellow Zone) which is just above the overflow guard area
305 -- on the stack (called the Red Zone). During task execution, we want
306 -- signals from the Red Zone, so we need to hide the Yellow Zone. This
307 -- procedure is called at the start of task execution (with Hide set True)
308 -- to hide the Yellow Zone, and at the end of task execution (with Hide
309 -- set False) to unhide the Yellow Zone.
311 ---------------------------------------
312 -- Nonstandard Thread Initialization --
313 ---------------------------------------
315 procedure pthread_init;
316 pragma Inline (pthread_init);
317 -- This is a dummy procedure to share some GNULLI files
319 -------------------------
320 -- POSIX.1c Section 3 --
321 -------------------------
324 (set : access sigset_t;
325 sig : access Signal) return int;
326 pragma Import (C, sigwait, "__sigwaitd10");
328 function pthread_kill
330 sig : Signal) return int;
331 pragma Import (C, pthread_kill);
333 function pthread_sigmask
335 set : access sigset_t;
336 oset : access sigset_t) return int;
337 pragma Import (C, pthread_sigmask);
339 --------------------------
340 -- POSIX.1c Section 11 --
341 --------------------------
343 function pthread_mutexattr_init (attr : access pthread_mutexattr_t)
345 pragma Import (C, pthread_mutexattr_init);
347 function pthread_mutexattr_destroy
348 (attr : access pthread_mutexattr_t) return int;
349 pragma Import (C, pthread_mutexattr_destroy);
351 function pthread_mutex_init
352 (mutex : access pthread_mutex_t;
353 attr : access pthread_mutexattr_t) return int;
354 pragma Import (C, pthread_mutex_init, "__pthread_mutex_init");
356 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
357 pragma Import (C, pthread_mutex_destroy, "__pthread_mutex_destroy");
359 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
360 pragma Import (C, pthread_mutex_lock, "__pthread_mutex_lock");
362 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
363 pragma Import (C, pthread_mutex_unlock, "__pthread_mutex_unlock");
365 function pthread_condattr_init
366 (attr : access pthread_condattr_t) return int;
367 pragma Import (C, pthread_condattr_init);
369 function pthread_condattr_destroy
370 (attr : access pthread_condattr_t) return int;
371 pragma Import (C, pthread_condattr_destroy);
373 function pthread_cond_init
374 (cond : access pthread_cond_t;
375 attr : access pthread_condattr_t) return int;
376 pragma Import (C, pthread_cond_init, "__pthread_cond_init");
378 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
379 pragma Import (C, pthread_cond_destroy, "__pthread_cond_destroy");
381 function pthread_cond_signal (cond : access pthread_cond_t) return int;
382 pragma Import (C, pthread_cond_signal, "__pthread_cond_signal");
384 function pthread_cond_wait
385 (cond : access pthread_cond_t;
386 mutex : access pthread_mutex_t) return int;
387 pragma Import (C, pthread_cond_wait, "__pthread_cond_wait");
389 function pthread_cond_timedwait
390 (cond : access pthread_cond_t;
391 mutex : access pthread_mutex_t;
392 abstime : access timespec) return int;
393 pragma Import (C, pthread_cond_timedwait, "__pthread_cond_timedwait");
395 --------------------------
396 -- POSIX.1c Section 13 --
397 --------------------------
399 function pthread_mutexattr_setprotocol
400 (attr : access pthread_mutexattr_t;
401 protocol : int) return int;
402 pragma Import (C, pthread_mutexattr_setprotocol);
404 function pthread_mutexattr_setprioceiling
405 (attr : access pthread_mutexattr_t;
406 prioceiling : int) return int;
407 pragma Import (C, pthread_mutexattr_setprioceiling);
409 type struct_sched_param is record
410 sched_priority : int; -- scheduling priority
413 function pthread_setschedparam
416 param : access struct_sched_param) return int;
417 pragma Import (C, pthread_setschedparam);
419 function pthread_attr_setscope
420 (attr : access pthread_attr_t;
421 contentionscope : int) return int;
422 pragma Import (C, pthread_attr_setscope);
424 function pthread_attr_setinheritsched
425 (attr : access pthread_attr_t;
426 inheritsched : int) return int;
427 pragma Import (C, pthread_attr_setinheritsched,
428 "__pthread_attr_setinheritsched");
430 function pthread_attr_setschedpolicy
431 (attr : access pthread_attr_t; policy : int) return int;
432 pragma Import (C, pthread_attr_setschedpolicy);
434 function pthread_attr_setschedparam
435 (attr : access pthread_attr_t;
436 sched_param : access struct_sched_param) return int;
437 pragma Import (C, pthread_attr_setschedparam);
439 function sched_yield return int;
440 pragma Import (C, sched_yield);
442 --------------------------
443 -- P1003.1c Section 16 --
444 --------------------------
446 function pthread_attr_init (attributes : access pthread_attr_t)
448 pragma Import (C, pthread_attr_init);
450 function pthread_attr_destroy (attributes : access pthread_attr_t)
452 pragma Import (C, pthread_attr_destroy);
454 function pthread_attr_setdetachstate
455 (attr : access pthread_attr_t;
456 detachstate : int) return int;
457 pragma Import (C, pthread_attr_setdetachstate);
459 function pthread_attr_setstacksize
460 (attr : access pthread_attr_t;
461 stacksize : size_t) return int;
462 pragma Import (C, pthread_attr_setstacksize, "__pthread_attr_setstacksize");
464 function pthread_create
465 (thread : access pthread_t;
466 attributes : access pthread_attr_t;
467 start_routine : Thread_Body;
468 arg : System.Address) return int;
469 pragma Import (C, pthread_create, "__pthread_create");
471 procedure pthread_exit (status : System.Address);
472 pragma Import (C, pthread_exit, "__pthread_exit");
474 function pthread_self return pthread_t;
475 pragma Inline (pthread_self);
477 --------------------------
478 -- POSIX.1c Section 17 --
479 --------------------------
481 function pthread_setspecific
482 (key : pthread_key_t; value : System.Address) return int;
483 pragma Import (C, pthread_setspecific, "__pthread_setspecific");
485 function pthread_getspecific (key : pthread_key_t) return System.Address;
486 pragma Import (C, pthread_getspecific, "__pthread_getspecific");
488 type destructor_pointer is access procedure (arg : System.Address);
489 pragma Convention (C, destructor_pointer);
491 function pthread_key_create
492 (key : access pthread_key_t;
493 destructor : destructor_pointer) return int;
494 pragma Import (C, pthread_key_create);
498 type sigset_t is new unsigned_long;
500 type pid_t is new int;
502 type time_t is new int;
504 type timespec is record
508 pragma Convention (C, timespec);
510 type clockid_t is new int;
511 CLOCK_REALTIME : constant clockid_t := 1;
513 type unsigned_long_array is array (Natural range <>) of unsigned_long;
515 type pthread_t is new System.Address;
517 type pthread_teb_t is record
518 reserved1 : System.Address;
519 reserved2 : System.Address;
520 size : unsigned_short;
521 version : unsigned_char;
522 reserved3 : unsigned_char;
523 external : unsigned_char;
524 reserved4 : char_array (0 .. 1);
525 creator : unsigned_char;
526 sequence : unsigned_long;
527 reserved5 : unsigned_long_array (0 .. 1);
528 per_kt_area : System.Address;
529 stack_base : System.Address;
530 stack_reserve : System.Address;
531 stack_yellow : System.Address;
532 stack_guard : System.Address;
533 stack_size : unsigned_long;
534 tsd_values : System.Address;
535 tsd_count : unsigned_long;
536 reserved6 : unsigned;
537 reserved7 : unsigned;
538 thread_flags : unsigned;
540 stack_hiwater : System.Address;
541 home_rad : unsigned_long;
543 pragma Convention (C, pthread_teb_t);
545 type pthread_cond_t is record
548 name : System.Address;
550 reserved1 : unsigned;
551 sequence : unsigned_long;
552 block : System.Address;
554 pragma Convention (C, pthread_cond_t);
556 type pthread_attr_t is record
558 name : System.Address;
560 reserved : unsigned_long_array (0 .. 18);
562 pragma Convention (C, pthread_attr_t);
564 type pthread_mutex_t is record
567 name : System.Address;
570 sequence : unsigned_long;
571 owner : unsigned_long;
572 block : System.Address;
574 for pthread_mutex_t'Size use 8 * 48;
575 pragma Convention (C, pthread_mutex_t);
577 type pthread_mutexattr_t is record
579 reserved : unsigned_long_array (0 .. 14);
581 pragma Convention (C, pthread_mutexattr_t);
583 type pthread_condattr_t is record
585 reserved : unsigned_long_array (0 .. 12);
587 pragma Convention (C, pthread_condattr_t);
589 type pthread_key_t is new unsigned;
591 end System.OS_Interface;