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) 1995-2010, Free Software Foundation, Inc. --
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. --
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. --
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/>. --
28 -- GNARL was developed by the GNARL team at Florida State University. --
29 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
31 ------------------------------------------------------------------------------
33 -- This is the Tru64 version of this package
35 -- This package encapsulates all direct interfaces to OS services
36 -- that are needed by the tasking run-time (libgnarl).
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.
43 with Ada.Unchecked_Conversion;
45 package System.OS_Interface is
48 pragma Linker_Options ("-lpthread");
49 pragma Linker_Options ("-lmach");
50 pragma Linker_Options ("-lexc");
51 pragma Linker_Options ("-lrt");
53 subtype int is Interfaces.C.int;
54 subtype short is Interfaces.C.short;
55 subtype long is Interfaces.C.long;
56 subtype unsigned is Interfaces.C.unsigned;
57 subtype unsigned_short is Interfaces.C.unsigned_short;
58 subtype unsigned_long is Interfaces.C.unsigned_long;
59 subtype unsigned_char is Interfaces.C.unsigned_char;
60 subtype plain_char is Interfaces.C.plain_char;
61 subtype size_t is Interfaces.C.size_t;
62 subtype char_array is Interfaces.C.char_array;
68 function errno return int;
69 pragma Import (C, errno, "_Geterrno");
71 EAGAIN : constant := 35;
72 EINTR : constant := 4;
73 EINVAL : constant := 22;
74 ENOMEM : constant := 12;
75 ETIMEDOUT : constant := 60;
81 Max_Interrupt : constant := 48;
82 type Signal is new int range 0 .. Max_Interrupt;
83 for Signal'Size use int'Size;
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 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
91 SIGIOT : constant := 6; -- abort (terminate) process
92 SIGLOST : constant := 6; -- old BSD signal ??
93 SIGEMT : constant := 7; -- EMT instruction
94 SIGFPE : constant := 8; -- floating point exception
95 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
96 SIGBUS : constant := 10; -- bus error
97 SIGSEGV : constant := 11; -- segmentation violation
98 SIGSYS : constant := 12; -- bad argument to system call
99 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
100 SIGALRM : constant := 14; -- alarm clock
101 SIGTERM : constant := 15; -- software termination signal from kill
102 SIGURG : constant := 16; -- urgent condition on IO channel
103 SIGIOINT : constant := 16; -- printer to backend error signal
104 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
105 SIGTSTP : constant := 18; -- user stop requested from tty
106 SIGCONT : constant := 19; -- stopped process has been continued
107 SIGCHLD : constant := 20; -- child status change
108 SIGTTIN : constant := 21; -- background tty read attempted
109 SIGTTOU : constant := 22; -- background tty write attempted
110 SIGPOLL : constant := 23; -- I/O possible, or completed
111 SIGIO : constant := 23; -- STREAMS version of SIGPOLL
112 SIGAIO : constant := 23; -- base lan i/o
113 SIGPTY : constant := 23; -- pty i/o
114 SIGXCPU : constant := 24; -- CPU time limit exceeded
115 SIGXFSZ : constant := 25; -- filesize limit exceeded
116 SIGVTALRM : constant := 26; -- virtual timer expired
117 SIGPROF : constant := 27; -- profiling timer expired
118 SIGWINCH : constant := 28; -- window size change
119 SIGINFO : constant := 29; -- information request
120 SIGPWR : constant := 29; -- Power Fail/Restart -- SVID3/SVR4
121 SIGUSR1 : constant := 30; -- user defined signal 1
122 SIGUSR2 : constant := 31; -- user defined signal 2
123 SIGRESV : constant := 32; -- reserved by Digital for future use
125 SIGADAABORT : constant := SIGABRT;
127 type Signal_Set is array (Natural range <>) of Signal;
129 Unmasked : constant Signal_Set := (0 .. 0 => SIGTRAP);
130 Reserved : constant Signal_Set := (SIGALRM, SIGABRT, SIGKILL, SIGSTOP);
132 type sigset_t is private;
134 function sigaddset (set : access sigset_t; sig : Signal) return int;
135 pragma Import (C, sigaddset);
137 function sigdelset (set : access sigset_t; sig : Signal) return int;
138 pragma Import (C, sigdelset);
140 function sigfillset (set : access sigset_t) return int;
141 pragma Import (C, sigfillset);
143 function sigismember (set : access sigset_t; sig : Signal) return int;
144 pragma Import (C, sigismember);
146 function sigemptyset (set : access sigset_t) return int;
147 pragma Import (C, sigemptyset);
149 type union_type_3 is new String (1 .. 116);
150 type siginfo_t is record
154 X_data : union_type_3;
156 for siginfo_t'Size use 8 * 128;
157 pragma Convention (C, siginfo_t);
159 type struct_sigaction is record
160 sa_handler : System.Address;
165 pragma Convention (C, struct_sigaction);
166 type struct_sigaction_ptr is access all struct_sigaction;
168 SIG_BLOCK : constant := 1;
169 SIG_UNBLOCK : constant := 2;
170 SIG_SETMASK : constant := 3;
172 SIG_DFL : constant := 0;
173 SIG_IGN : constant := 1;
175 SA_NODEFER : constant := 8;
176 SA_SIGINFO : constant := 16#40#;
177 SA_ONSTACK : constant := 16#01#;
181 act : struct_sigaction_ptr;
182 oact : struct_sigaction_ptr) return int;
183 pragma Import (C, sigaction);
189 type timespec is private;
191 function nanosleep (rqtp, rmtp : access timespec) return int;
192 pragma Import (C, nanosleep);
194 type clockid_t is private;
196 CLOCK_REALTIME : constant clockid_t;
198 function clock_gettime
199 (clock_id : clockid_t;
200 tp : access timespec) return int;
201 pragma Import (C, clock_gettime);
203 function To_Duration (TS : timespec) return Duration;
204 pragma Inline (To_Duration);
206 function To_Timespec (D : Duration) return timespec;
207 pragma Inline (To_Timespec);
209 type struct_timezone is record
210 tz_minuteswest : int;
213 pragma Convention (C, struct_timezone);
215 -------------------------
216 -- Priority Scheduling --
217 -------------------------
219 SCHED_FIFO : constant := 1;
220 SCHED_RR : constant := 2;
221 SCHED_OTHER : constant := 3;
222 SCHED_LFI : constant := 5;
228 type pid_t is private;
230 function kill (pid : pid_t; sig : Signal) return int;
231 pragma Import (C, kill);
233 function getpid return pid_t;
234 pragma Import (C, getpid);
236 BIND_NO_INHERIT : constant := 1;
240 cpu_mask : unsigned_long;
241 flag : unsigned_long := BIND_NO_INHERIT) return int;
242 pragma Import (C, bind_to_cpu);
248 type Thread_Body is access
249 function (arg : System.Address) return System.Address;
250 pragma Convention (C, Thread_Body);
252 function Thread_Body_Access is new
253 Ada.Unchecked_Conversion (System.Address, Thread_Body);
255 type pthread_t is private;
256 subtype Thread_Id is pthread_t;
258 type pthread_mutex_t is limited private;
259 type pthread_cond_t is limited private;
260 type pthread_attr_t is limited private;
261 type pthread_mutexattr_t is limited private;
262 type pthread_condattr_t is limited private;
263 type pthread_key_t is private;
265 PTHREAD_CREATE_DETACHED : constant := 1;
267 PTHREAD_SCOPE_PROCESS : constant := 0;
268 PTHREAD_SCOPE_SYSTEM : constant := 1;
270 PTHREAD_EXPLICIT_SCHED : constant := 1;
276 Stack_Base_Available : constant Boolean := False;
277 -- Indicates if the stack base is available on this target
279 function Get_Stack_Base (thread : pthread_t) return Address;
280 pragma Inline (Get_Stack_Base);
281 -- Returns the stack base of the specified thread. Only call this function
282 -- when Stack_Base_Available is True.
284 function Get_Page_Size return size_t;
285 function Get_Page_Size return Address;
286 pragma Import (C, Get_Page_Size, "getpagesize");
287 -- Returns the size of a page
289 PROT_NONE : constant := 0;
290 PROT_READ : constant := 1;
291 PROT_WRITE : constant := 2;
292 PROT_EXEC : constant := 4;
293 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
295 PROT_ON : constant := PROT_READ;
296 PROT_OFF : constant := PROT_ALL;
298 function mprotect (addr : Address; len : size_t; prot : int) return int;
299 pragma Import (C, mprotect);
301 procedure Hide_Unhide_Yellow_Zone (Hide : Boolean);
302 -- Every thread except the initial one features an overflow warning area
303 -- (called the Yellow Zone) which is just above the overflow guard area
304 -- on the stack (called the Red Zone). During task execution, we want
305 -- signals from the Red Zone, so we need to hide the Yellow Zone. This
306 -- procedure is called at the start of task execution (with Hide set True)
307 -- to hide the Yellow Zone, and at the end of task execution (with Hide
308 -- set False) to unhide the Yellow Zone.
310 ---------------------------------------
311 -- Nonstandard Thread Initialization --
312 ---------------------------------------
314 procedure pthread_init;
315 pragma Inline (pthread_init);
316 -- This is a dummy procedure to share some GNULLI files
318 -------------------------
319 -- POSIX.1c Section 3 --
320 -------------------------
323 (set : access sigset_t;
324 sig : access Signal) return int;
325 pragma Import (C, sigwait, "__sigwaitd10");
327 function pthread_kill
329 sig : Signal) return int;
330 pragma Import (C, pthread_kill);
332 function pthread_sigmask
334 set : access sigset_t;
335 oset : access sigset_t) return int;
336 pragma Import (C, pthread_sigmask);
338 --------------------------
339 -- POSIX.1c Section 11 --
340 --------------------------
342 function pthread_mutexattr_init (attr : access pthread_mutexattr_t)
344 pragma Import (C, pthread_mutexattr_init);
346 function pthread_mutexattr_destroy
347 (attr : access pthread_mutexattr_t) return int;
348 pragma Import (C, pthread_mutexattr_destroy);
350 function pthread_mutex_init
351 (mutex : access pthread_mutex_t;
352 attr : access pthread_mutexattr_t) return int;
353 pragma Import (C, pthread_mutex_init, "__pthread_mutex_init");
355 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
356 pragma Import (C, pthread_mutex_destroy, "__pthread_mutex_destroy");
358 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
359 pragma Import (C, pthread_mutex_lock, "__pthread_mutex_lock");
361 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
362 pragma Import (C, pthread_mutex_unlock, "__pthread_mutex_unlock");
364 function pthread_condattr_init
365 (attr : access pthread_condattr_t) return int;
366 pragma Import (C, pthread_condattr_init);
368 function pthread_condattr_destroy
369 (attr : access pthread_condattr_t) return int;
370 pragma Import (C, pthread_condattr_destroy);
372 function pthread_cond_init
373 (cond : access pthread_cond_t;
374 attr : access pthread_condattr_t) return int;
375 pragma Import (C, pthread_cond_init, "__pthread_cond_init");
377 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
378 pragma Import (C, pthread_cond_destroy, "__pthread_cond_destroy");
380 function pthread_cond_signal (cond : access pthread_cond_t) return int;
381 pragma Import (C, pthread_cond_signal, "__pthread_cond_signal");
383 function pthread_cond_wait
384 (cond : access pthread_cond_t;
385 mutex : access pthread_mutex_t) return int;
386 pragma Import (C, pthread_cond_wait, "__pthread_cond_wait");
388 function pthread_cond_timedwait
389 (cond : access pthread_cond_t;
390 mutex : access pthread_mutex_t;
391 abstime : access timespec) return int;
392 pragma Import (C, pthread_cond_timedwait, "__pthread_cond_timedwait");
394 --------------------------
395 -- POSIX.1c Section 13 --
396 --------------------------
398 function pthread_mutexattr_setprotocol
399 (attr : access pthread_mutexattr_t;
400 protocol : int) return int;
401 pragma Import (C, pthread_mutexattr_setprotocol);
403 function pthread_mutexattr_setprioceiling
404 (attr : access pthread_mutexattr_t;
405 prioceiling : int) return int;
406 pragma Import (C, pthread_mutexattr_setprioceiling);
408 type struct_sched_param is record
409 sched_priority : int; -- scheduling priority
412 function pthread_setschedparam
415 param : access struct_sched_param) return int;
416 pragma Import (C, pthread_setschedparam);
418 function pthread_attr_setscope
419 (attr : access pthread_attr_t;
420 contentionscope : int) return int;
421 pragma Import (C, pthread_attr_setscope);
423 function pthread_attr_setinheritsched
424 (attr : access pthread_attr_t;
425 inheritsched : int) return int;
426 pragma Import (C, pthread_attr_setinheritsched,
427 "__pthread_attr_setinheritsched");
429 function pthread_attr_setschedpolicy
430 (attr : access pthread_attr_t; policy : int) return int;
431 pragma Import (C, pthread_attr_setschedpolicy);
433 function pthread_attr_setschedparam
434 (attr : access pthread_attr_t;
435 sched_param : access struct_sched_param) return int;
436 pragma Import (C, pthread_attr_setschedparam);
438 function sched_yield return int;
439 pragma Import (C, sched_yield);
441 --------------------------
442 -- P1003.1c Section 16 --
443 --------------------------
445 function pthread_attr_init (attributes : access pthread_attr_t)
447 pragma Import (C, pthread_attr_init);
449 function pthread_attr_destroy (attributes : access pthread_attr_t)
451 pragma Import (C, pthread_attr_destroy);
453 function pthread_attr_setdetachstate
454 (attr : access pthread_attr_t;
455 detachstate : int) return int;
456 pragma Import (C, pthread_attr_setdetachstate);
458 function pthread_attr_setstacksize
459 (attr : access pthread_attr_t;
460 stacksize : size_t) return int;
461 pragma Import (C, pthread_attr_setstacksize, "__pthread_attr_setstacksize");
463 function pthread_create
464 (thread : access pthread_t;
465 attributes : access pthread_attr_t;
466 start_routine : Thread_Body;
467 arg : System.Address) return int;
468 pragma Import (C, pthread_create, "__pthread_create");
470 procedure pthread_exit (status : System.Address);
471 pragma Import (C, pthread_exit, "__pthread_exit");
473 function pthread_self return pthread_t;
474 pragma Inline (pthread_self);
476 --------------------------
477 -- POSIX.1c Section 17 --
478 --------------------------
480 function pthread_setspecific
481 (key : pthread_key_t; value : System.Address) return int;
482 pragma Import (C, pthread_setspecific, "__pthread_setspecific");
484 function pthread_getspecific (key : pthread_key_t) return System.Address;
485 pragma Import (C, pthread_getspecific, "__pthread_getspecific");
487 type destructor_pointer is access procedure (arg : System.Address);
488 pragma Convention (C, destructor_pointer);
490 function pthread_key_create
491 (key : access pthread_key_t;
492 destructor : destructor_pointer) return int;
493 pragma Import (C, pthread_key_create);
497 type sigset_t is new unsigned_long;
499 type pid_t is new int;
501 type time_t is new int;
503 type timespec is record
507 pragma Convention (C, timespec);
509 type clockid_t is new int;
510 CLOCK_REALTIME : constant clockid_t := 1;
512 type unsigned_long_array is array (Natural range <>) of unsigned_long;
514 type pthread_t is new System.Address;
516 type pthread_teb_t is record
517 reserved1 : System.Address;
518 reserved2 : System.Address;
519 size : unsigned_short;
520 version : unsigned_char;
521 reserved3 : unsigned_char;
522 external : unsigned_char;
523 reserved4 : char_array (0 .. 1);
524 creator : unsigned_char;
525 sequence : unsigned_long;
526 reserved5 : unsigned_long_array (0 .. 1);
527 per_kt_area : System.Address;
528 stack_base : System.Address;
529 stack_reserve : System.Address;
530 stack_yellow : System.Address;
531 stack_guard : System.Address;
532 stack_size : unsigned_long;
533 tsd_values : System.Address;
534 tsd_count : unsigned_long;
535 reserved6 : unsigned;
536 reserved7 : unsigned;
537 thread_flags : unsigned;
539 stack_hiwater : System.Address;
540 home_rad : unsigned_long;
542 pragma Convention (C, pthread_teb_t);
544 type pthread_cond_t is record
547 name : System.Address;
549 reserved1 : unsigned;
550 sequence : unsigned_long;
551 block : System.Address;
553 pragma Convention (C, pthread_cond_t);
555 type pthread_attr_t is record
557 name : System.Address;
559 reserved : unsigned_long_array (0 .. 18);
561 pragma Convention (C, pthread_attr_t);
563 type pthread_mutex_t is record
566 name : System.Address;
569 sequence : unsigned_long;
570 owner : unsigned_long;
571 block : System.Address;
573 for pthread_mutex_t'Size use 8 * 48;
574 pragma Convention (C, pthread_mutex_t);
576 type pthread_mutexattr_t is record
578 reserved : unsigned_long_array (0 .. 14);
580 pragma Convention (C, pthread_mutexattr_t);
582 type pthread_condattr_t is record
584 reserved : unsigned_long_array (0 .. 12);
586 pragma Convention (C, pthread_condattr_t);
588 type pthread_key_t is new unsigned;
590 end System.OS_Interface;