1 ------------------------------------------------------------------------------
3 -- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
5 -- S Y S T E M . O S _ I N T E R F A C E --
10 -- Copyright (C) 1999-2001 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, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, 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 a UnixWare (Native THREADS) version of this package.
37 -- This package encapsulates all direct interfaces to OS services
38 -- that are needed by children of System.
40 -- PLEASE DO NOT add any with-clauses to this package
41 -- or remove the pragma Elaborate_Body.
42 -- It is designed to be a bottom-level (leaf) package.
45 package System
.OS_Interface
is
48 pragma Linker_Options
("-lthread");
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
;
65 function errno
return int
;
66 pragma Import
(C
, errno
, "__get_errno");
68 EAGAIN
: constant := 11;
69 EINTR
: constant := 4;
70 EINVAL
: constant := 22;
71 ENOMEM
: constant := 12;
72 ETIMEDOUT
: constant := 145;
78 Max_Interrupt
: constant := 34;
79 type Signal
is new int
range 0 .. Max_Interrupt
;
80 for Signal
'Size use int
'Size;
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 SIGIOT
: constant := 6; -- IOT instruction
88 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
89 SIGEMT
: constant := 7; -- EMT instruction
90 SIGFPE
: constant := 8; -- floating point exception
91 SIGKILL
: constant := 9; -- kill (cannot be caught or ignored)
92 SIGBUS
: constant := 10; -- bus error
93 SIGSEGV
: constant := 11; -- segmentation violation
94 SIGSYS
: constant := 12; -- bad argument to system call
95 SIGPIPE
: constant := 13; -- write on a pipe with no one to read it
96 SIGALRM
: constant := 14; -- alarm clock
97 SIGTERM
: constant := 15; -- software termination signal from kill
98 SIGUSR1
: constant := 16; -- user defined signal 1
99 SIGUSR2
: constant := 17; -- user defined signal 2
100 SIGCLD
: constant := 18; -- alias for SIGCHLD
101 SIGCHLD
: constant := 18; -- child status change
102 SIGPWR
: constant := 19; -- power-fail restart
103 SIGWINCH
: constant := 20; -- window size change
104 SIGURG
: constant := 21; -- urgent condition on IO channel
105 SIGPOLL
: constant := 22; -- pollable event occurred
106 SIGIO
: constant := 22; -- I/O possible (Solaris SIGPOLL alias)
107 SIGSTOP
: constant := 23; -- stop (cannot be caught or ignored)
108 SIGTSTP
: constant := 24; -- user stop requested from tty
109 SIGCONT
: constant := 25; -- stopped process has been continued
110 SIGTTIN
: constant := 26; -- background tty read attempted
111 SIGTTOU
: constant := 27; -- background tty write attempted
112 SIGVTALRM
: constant := 28; -- virtual timer expired
113 SIGPROF
: constant := 29; -- profiling timer expired
114 SIGXCPU
: constant := 30; -- CPU time limit exceeded
115 SIGXFSZ
: constant := 31; -- filesize limit exceeded
116 SIGWAITING
: constant := 32; -- all LWPs blocked interruptibly notific.
117 SIGLWP
: constant := 33; -- signal reserved for thread lib impl.
118 SIGAIO
: constant := 34; -- Asynchronous I/O signal
120 SIGADAABORT
: constant := SIGABRT
;
121 -- Change this if you want to use another signal for task abort.
122 -- SIGTERM might be a good one.
124 type Signal_Set
is array (Natural range <>) of Signal
;
126 Unmasked
: constant Signal_Set
:=
127 (SIGTRAP
, SIGLWP
, SIGWAITING
, SIGTTIN
, SIGTTOU
, SIGTSTP
, SIGPROF
);
128 Reserved
: constant Signal_Set
:= (SIGABRT
, SIGKILL
, SIGSTOP
);
130 type sigset_t
is private;
132 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
133 pragma Import
(C
, sigaddset
, "sigaddset");
135 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
136 pragma Import
(C
, sigdelset
, "sigdelset");
138 function sigfillset
(set
: access sigset_t
) return int
;
139 pragma Import
(C
, sigfillset
, "sigfillset");
141 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
142 pragma Import
(C
, sigismember
, "sigismember");
144 function sigemptyset
(set
: access sigset_t
) return int
;
145 pragma Import
(C
, sigemptyset
, "sigemptyset");
147 type struct_sigaction
is record
149 sa_handler
: System
.Address
;
154 pragma Convention
(C
, struct_sigaction
);
155 type struct_sigaction_ptr
is access all struct_sigaction
;
157 SIG_BLOCK
: constant := 1;
158 SIG_UNBLOCK
: constant := 2;
159 SIG_SETMASK
: constant := 3;
161 SIG_DFL
: constant := 0;
162 SIG_IGN
: constant := 1;
163 -- SIG_ERR : constant := -1;
168 act
: struct_sigaction_ptr
;
169 oact
: struct_sigaction_ptr
) return int
;
170 pragma Import
(C
, sigaction
, "sigaction");
176 Time_Slice_Supported
: constant Boolean := False;
177 -- Indicates wether time slicing is supported
179 type timespec
is private;
181 type clockid_t
is private;
183 CLOCK_REALTIME
: constant clockid_t
;
185 function clock_gettime
186 (clock_id
: clockid_t
;
187 tp
: access timespec
) return int
;
188 -- UnixWare threads don't have clock_gettime
189 -- We instead use gettimeofday()
191 function To_Duration
(TS
: timespec
) return Duration;
192 pragma Inline
(To_Duration
);
194 function To_Timespec
(D
: Duration) return timespec
;
195 pragma Inline
(To_Timespec
);
197 type struct_timezone
is record
198 tz_minuteswest
: int
;
201 pragma Convention
(C
, struct_timezone
);
202 type struct_timezone_ptr
is access all struct_timezone
;
204 type struct_timeval
is private;
205 -- This is needed on systems that do not have clock_gettime()
206 -- but do have gettimeofday().
208 function To_Duration
(TV
: struct_timeval
) return Duration;
209 pragma Inline
(To_Duration
);
211 function To_Timeval
(D
: Duration) return struct_timeval
;
212 pragma Inline
(To_Timeval
);
214 -------------------------
215 -- Priority Scheduling --
216 -------------------------
218 SCHED_FIFO
: constant := 2;
219 SCHED_RR
: constant := 3;
220 SCHED_OTHER
: constant := 1;
226 type pid_t
is private;
228 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
229 pragma Import
(C
, kill
, "kill");
231 function getpid
return pid_t
;
232 pragma Import
(C
, getpid
, "getpid");
238 function lwp_self
return System
.Address
;
239 pragma Import
(C
, lwp_self
, "_lwp_self");
245 type Thread_Body
is access
246 function (arg
: System
.Address
) return System
.Address
;
247 type pthread_t
is private;
248 subtype Thread_Id
is pthread_t
;
250 type pthread_mutex_t
is limited private;
251 type pthread_cond_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;
257 PTHREAD_CREATE_DETACHED
: constant := 0;
263 Stack_Base_Available
: constant Boolean := False;
264 -- Indicates wether the stack base is available on this target.
266 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
267 pragma Inline
(Get_Stack_Base
);
268 -- returns the stack base of the specified thread.
269 -- Only call this function when Stack_Base_Available is True.
271 function Get_Page_Size
return size_t
;
272 function Get_Page_Size
return Address
;
273 pragma Import
(C
, Get_Page_Size
, "getpagesize");
274 -- returns the size of a page, or 0 if this is not relevant on this
277 PROT_NONE
: constant := 0;
278 PROT_READ
: constant := 1;
279 PROT_WRITE
: constant := 2;
280 PROT_EXEC
: constant := 4;
281 PROT_USER
: constant := 8;
282 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
+ PROT_USER
;
284 PROT_ON
: constant := PROT_READ
;
285 PROT_OFF
: constant := PROT_ALL
;
287 function mprotect
(addr
: Address
; len
: size_t
; prot
: int
) return int
;
288 pragma Import
(C
, mprotect
);
290 -------------------------
291 -- POSIX.1c Section 3 --
292 -------------------------
294 function sigwait
(set
: access sigset_t
; sig
: access Signal
) return int
;
295 pragma Inline
(sigwait
);
296 -- UnixWare provides a non standard sigwait
298 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
299 pragma Inline
(pthread_kill
);
300 -- UnixWare provides a non standard pthread_kill
302 type sigset_t_ptr
is access all sigset_t
;
304 function pthread_sigmask
307 oset
: sigset_t_ptr
) return int
;
308 pragma Import
(C
, pthread_sigmask
, "pthread_sigmask");
310 --------------------------
311 -- POSIX.1c Section 11 --
312 --------------------------
314 function pthread_mutexattr_init
315 (attr
: access pthread_mutexattr_t
) return int
;
316 pragma Import
(C
, pthread_mutexattr_init
, "pthread_mutexattr_init");
318 function pthread_mutexattr_destroy
319 (attr
: access pthread_mutexattr_t
) return int
;
320 pragma Import
(C
, pthread_mutexattr_destroy
, "pthread_mutexattr_destroy");
322 function pthread_mutex_init
323 (mutex
: access pthread_mutex_t
;
324 attr
: access pthread_mutexattr_t
) return int
;
325 pragma Import
(C
, pthread_mutex_init
, "pthread_mutex_init");
327 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
328 pragma Import
(C
, pthread_mutex_destroy
, "pthread_mutex_destroy");
330 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
331 pragma Import
(C
, pthread_mutex_lock
, "pthread_mutex_lock");
333 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
334 pragma Import
(C
, pthread_mutex_unlock
, "pthread_mutex_unlock");
336 function pthread_condattr_init
337 (attr
: access pthread_condattr_t
) return int
;
338 pragma Import
(C
, pthread_condattr_init
, "pthread_condattr_init");
340 function pthread_condattr_destroy
341 (attr
: access pthread_condattr_t
) return int
;
342 pragma Import
(C
, pthread_condattr_destroy
, "pthread_condattr_destroy");
344 function pthread_cond_init
345 (cond
: access pthread_cond_t
;
346 attr
: access pthread_condattr_t
) return int
;
347 pragma Import
(C
, pthread_cond_init
, "pthread_cond_init");
349 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
350 pragma Import
(C
, pthread_cond_destroy
, "pthread_cond_destroy");
352 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
353 pragma Import
(C
, pthread_cond_signal
, "pthread_cond_signal");
355 function pthread_cond_wait
356 (cond
: access pthread_cond_t
;
357 mutex
: access pthread_mutex_t
) return int
;
358 pragma Import
(C
, pthread_cond_wait
, "pthread_cond_wait");
360 function pthread_cond_timedwait
361 (cond
: access pthread_cond_t
;
362 mutex
: access pthread_mutex_t
;
363 abstime
: access timespec
) return int
;
364 pragma Import
(C
, pthread_cond_timedwait
, "pthread_cond_timedwait");
366 Relative_Timed_Wait
: constant Boolean := False;
367 -- pthread_cond_timedwait requires an absolute delay time
369 --------------------------
370 -- POSIX.1c Section 13 --
371 --------------------------
373 PTHREAD_PRIO_NONE
: constant := 1;
374 PTHREAD_PRIO_INHERIT
: constant := 2;
375 PTHREAD_PRIO_PROTECT
: constant := 3;
377 function pthread_mutexattr_setprotocol
378 (attr
: access pthread_mutexattr_t
;
379 protocol
: int
) return int
;
380 pragma Import
(C
, pthread_mutexattr_setprotocol
);
382 function pthread_mutexattr_setprioceiling
383 (attr
: access pthread_mutexattr_t
;
384 prioceiling
: int
) return int
;
385 pragma Import
(C
, pthread_mutexattr_setprioceiling
);
387 type sched_union
is record
392 policy_params
: long
;
395 type struct_sched_param
is record
396 sched_priority
: int
;
397 sched_other_stuff
: sched_union
;
400 function pthread_setschedparam
403 param
: access struct_sched_param
) return int
;
404 pragma Import
(C
, pthread_setschedparam
, "pthread_setschedparam");
406 function pthread_attr_setscope
407 (attr
: access pthread_attr_t
;
408 contentionscope
: int
) return int
;
409 pragma Import
(C
, pthread_attr_setscope
, "pthread_attr_setscope");
411 function pthread_attr_setinheritsched
412 (attr
: access pthread_attr_t
;
413 inheritsched
: int
) return int
;
414 pragma Import
(C
, pthread_attr_setinheritsched
);
416 function pthread_attr_setschedpolicy
417 (attr
: access pthread_attr_t
;
418 policy
: int
) return int
;
419 pragma Import
(C
, pthread_attr_setschedpolicy
);
421 function sched_yield
return int
;
422 pragma Import
(C
, sched_yield
, "sched_yield");
424 ---------------------------
425 -- P1003.1c - Section 16 --
426 ---------------------------
428 function pthread_attr_init
(attributes
: access pthread_attr_t
) return int
;
429 pragma Import
(C
, pthread_attr_init
, "pthread_attr_init");
431 function pthread_attr_destroy
432 (attributes
: access pthread_attr_t
) return int
;
433 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_destroy");
435 function pthread_attr_setdetachstate
436 (attr
: access pthread_attr_t
;
437 detachstate
: int
) return int
;
438 pragma Import
(C
, pthread_attr_setdetachstate
);
440 function pthread_attr_setstacksize
441 (attr
: access pthread_attr_t
;
442 stacksize
: size_t
) return int
;
443 pragma Import
(C
, pthread_attr_setstacksize
);
445 function pthread_create
446 (thread
: access pthread_t
;
447 attributes
: access pthread_attr_t
;
448 start_routine
: Thread_Body
;
449 arg
: System
.Address
) return int
;
450 pragma Import
(C
, pthread_create
, "pthread_create");
452 procedure pthread_exit
(status
: System
.Address
);
453 pragma Import
(C
, pthread_exit
, "pthread_exit");
455 function pthread_self
return pthread_t
;
456 pragma Import
(C
, pthread_self
, "pthread_self");
458 --------------------------
459 -- POSIX.1c Section 17 --
460 --------------------------
462 function pthread_setspecific
463 (key
: pthread_key_t
;
464 value
: System
.Address
) return int
;
465 pragma Import
(C
, pthread_setspecific
, "pthread_setspecific");
467 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
468 pragma Import
(C
, pthread_getspecific
, "pthread_getspecific");
470 type destructor_pointer
is access procedure (arg
: System
.Address
);
472 function pthread_key_create
473 (key
: access pthread_key_t
;
474 destructor
: destructor_pointer
) return int
;
475 pragma Import
(C
, pthread_key_create
, "pthread_key_create");
477 procedure pthread_init
;
478 -- This is a dummy procedure to share some GNULLI files
482 type sigbit_array
is array (1 .. 4) of unsigned
;
483 type sigset_t
is record
484 sa_sigbits
: sigbit_array
;
486 pragma Convention
(C_Pass_By_Copy
, sigset_t
);
488 type pid_t
is new unsigned
;
490 type time_t
is new long
;
492 type timespec
is record
496 pragma Convention
(C
, timespec
);
498 type clockid_t
is new int
;
499 CLOCK_REALTIME
: constant clockid_t
:= 0;
501 type struct_timeval
is record
505 pragma Convention
(C
, struct_timeval
);
507 type pthread_attr_t
is record
508 pt_attr_status
: int
;
509 pt_attr_stacksize
: size_t
;
510 pt_attr_stackaddr
: System
.Address
;
511 pt_attr_detachstate
: int
;
512 pt_attr_contentionscope
: int
;
513 pt_attr_inheritsched
: int
;
514 pt_attr_schedpolicy
: int
;
515 pt_attr_sched_param
: struct_sched_param
;
516 pt_attr_tlflags
: int
;
518 pragma Convention
(C
, pthread_attr_t
);
520 type pthread_condattr_t
is record
521 pt_condattr_status
: int
;
522 pt_condattr_pshared
: int
;
524 pragma Convention
(C
, pthread_condattr_t
);
526 type pthread_mutexattr_t
is record
527 pt_mutexattr_status
: int
;
528 pt_mutexattr_pshared
: int
;
529 pt_mutexattr_type
: int
;
531 pragma Convention
(C
, pthread_mutexattr_t
);
533 type thread_t
is new long
;
534 type pthread_t
is new thread_t
;
537 type thrq_elt_t_ptr
is access all thrq_elt_t
;
539 type thrq_elt_t
is record
540 thrq_next
: thrq_elt_t_ptr
;
541 thrq_prev
: thrq_elt_t_ptr
;
543 pragma Convention
(C
, thrq_elt_t
);
545 type lwp_mutex_t
is record
547 lock
: unsigned_char
;
549 pragma Convention
(C
, lwp_mutex_t
);
550 pragma Volatile
(lwp_mutex_t
);
552 type mutex_t
is record
553 m_lmutex
: lwp_mutex_t
;
554 m_sync_lock
: lwp_mutex_t
;
556 m_sleepq
: thrq_elt_t
;
560 pragma Convention
(C
, mutex_t
);
561 pragma Volatile
(mutex_t
);
563 type pthread_mutex_t
is record
564 pt_mutex_mutex
: mutex_t
;
565 pt_mutex_pid
: pid_t
;
566 pt_mutex_owner
: thread_t
;
567 pt_mutex_depth
: int
;
568 pt_mutex_attr
: pthread_mutexattr_t
;
570 pragma Convention
(C
, pthread_mutex_t
);
572 type lwp_cond_t
is record
575 pragma Convention
(C
, lwp_cond_t
);
576 pragma Volatile
(lwp_cond_t
);
578 type cond_t
is record
579 c_lcond
: lwp_cond_t
;
580 c_sync_lock
: lwp_mutex_t
;
582 c_syncq
: thrq_elt_t
;
584 pragma Convention
(C
, cond_t
);
585 pragma Volatile
(cond_t
);
587 type pthread_cond_t
is record
588 pt_cond_cond
: cond_t
;
589 pt_cond_attr
: pthread_condattr_t
;
591 pragma Convention
(C
, pthread_cond_t
);
593 type pthread_key_t
is new unsigned
;
595 end System
.OS_Interface
;