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) 1995-2005, 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 DEC Unix 4.0/5.1 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 or remove the pragma
41 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
44 with Unchecked_Conversion
;
46 package System
.OS_Interface
is
49 pragma Linker_Options
("-lpthread");
50 pragma Linker_Options
("-lmach");
51 pragma Linker_Options
("-lexc");
52 pragma Linker_Options
("-lrt");
54 subtype int
is Interfaces
.C
.int
;
55 subtype short
is Interfaces
.C
.short
;
56 subtype long
is Interfaces
.C
.long
;
57 subtype unsigned
is Interfaces
.C
.unsigned
;
58 subtype unsigned_short
is Interfaces
.C
.unsigned_short
;
59 subtype unsigned_long
is Interfaces
.C
.unsigned_long
;
60 subtype unsigned_char
is Interfaces
.C
.unsigned_char
;
61 subtype plain_char
is Interfaces
.C
.plain_char
;
62 subtype size_t
is Interfaces
.C
.size_t
;
63 subtype char_array
is Interfaces
.C
.char_array
;
69 function errno
return int
;
70 pragma Import
(C
, errno
, "_Geterrno");
72 EAGAIN
: constant := 35;
73 EINTR
: constant := 4;
74 EINVAL
: constant := 22;
75 ENOMEM
: constant := 12;
76 ETIMEDOUT
: constant := 60;
82 Max_Interrupt
: constant := 48;
83 type Signal
is new int
range 0 .. Max_Interrupt
;
84 for Signal
'Size use int
'Size;
86 SIGHUP
: constant := 1; -- hangup
87 SIGINT
: constant := 2; -- interrupt (rubout)
88 SIGQUIT
: constant := 3; -- quit (ASCD FS)
89 SIGILL
: constant := 4; -- illegal instruction (not reset)
90 SIGTRAP
: constant := 5; -- trace trap (not reset)
91 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
92 SIGIOT
: constant := 6; -- abort (terminate) process
93 SIGLOST
: constant := 6; -- old BSD signal ??
94 SIGEMT
: constant := 7; -- EMT instruction
95 SIGFPE
: constant := 8; -- floating point exception
96 SIGKILL
: constant := 9; -- kill (cannot be caught or ignored)
97 SIGBUS
: constant := 10; -- bus error
98 SIGSEGV
: constant := 11; -- segmentation violation
99 SIGSYS
: constant := 12; -- bad argument to system call
100 SIGPIPE
: constant := 13; -- write on a pipe with no one to read it
101 SIGALRM
: constant := 14; -- alarm clock
102 SIGTERM
: constant := 15; -- software termination signal from kill
103 SIGURG
: constant := 16; -- urgent condition on IO channel
104 SIGIOINT
: constant := 16; -- printer to backend error signal
105 SIGSTOP
: constant := 17; -- stop (cannot be caught or ignored)
106 SIGTSTP
: constant := 18; -- user stop requested from tty
107 SIGCONT
: constant := 19; -- stopped process has been continued
108 SIGCHLD
: constant := 20; -- child status change
109 SIGTTIN
: constant := 21; -- background tty read attempted
110 SIGTTOU
: constant := 22; -- background tty write attempted
111 SIGPOLL
: constant := 23; -- I/O possible, or completed
112 SIGIO
: constant := 23; -- STREAMS version of SIGPOLL
113 SIGAIO
: constant := 23; -- base lan i/o
114 SIGPTY
: constant := 23; -- pty i/o
115 SIGXCPU
: constant := 24; -- CPU time limit exceeded
116 SIGXFSZ
: constant := 25; -- filesize limit exceeded
117 SIGVTALRM
: constant := 26; -- virtual timer expired
118 SIGPROF
: constant := 27; -- profiling timer expired
119 SIGWINCH
: constant := 28; -- window size change
120 SIGINFO
: constant := 29; -- information request
121 SIGPWR
: constant := 29; -- Power Fail/Restart -- SVID3/SVR4
122 SIGUSR1
: constant := 30; -- user defined signal 1
123 SIGUSR2
: constant := 31; -- user defined signal 2
124 SIGRESV
: constant := 32; -- reserved by Digital for future use
126 SIGADAABORT
: constant := SIGABRT
;
128 type Signal_Set
is array (Natural range <>) of Signal
;
130 Unmasked
: constant Signal_Set
:= (0 .. 0 => SIGTRAP
);
131 Reserved
: constant Signal_Set
:= (SIGALRM
, SIGABRT
, SIGKILL
, SIGSTOP
);
133 type sigset_t
is private;
135 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
136 pragma Import
(C
, sigaddset
);
138 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
139 pragma Import
(C
, sigdelset
);
141 function sigfillset
(set
: access sigset_t
) return int
;
142 pragma Import
(C
, sigfillset
);
144 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
145 pragma Import
(C
, sigismember
);
147 function sigemptyset
(set
: access sigset_t
) return int
;
148 pragma Import
(C
, sigemptyset
);
150 type union_type_3
is new String (1 .. 116);
151 type siginfo_t
is record
155 X_data
: union_type_3
;
157 for siginfo_t
'Size use 8 * 128;
158 pragma Convention
(C
, siginfo_t
);
160 type struct_sigaction
is record
161 sa_handler
: System
.Address
;
166 pragma Convention
(C
, struct_sigaction
);
167 type struct_sigaction_ptr
is access all struct_sigaction
;
169 SIG_BLOCK
: constant := 1;
170 SIG_UNBLOCK
: constant := 2;
171 SIG_SETMASK
: constant := 3;
173 SIG_DFL
: constant := 0;
174 SIG_IGN
: constant := 1;
176 SA_NODEFER
: constant := 8;
177 SA_SIGINFO
: constant := 16#
40#
;
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
);
214 type struct_timeval
is private;
215 -- This is needed on systems that do not have clock_gettime()
216 -- but do have gettimeofday().
218 function To_Duration
(TV
: struct_timeval
) return Duration;
219 pragma Inline
(To_Duration
);
221 function To_Timeval
(D
: Duration) return struct_timeval
;
222 pragma Inline
(To_Timeval
);
224 -------------------------
225 -- Priority Scheduling --
226 -------------------------
228 SCHED_FIFO
: constant := 1;
229 SCHED_RR
: constant := 2;
230 SCHED_OTHER
: constant := 3;
231 SCHED_LFI
: constant := 5;
237 type pid_t
is private;
239 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
240 pragma Import
(C
, kill
);
242 function getpid
return pid_t
;
243 pragma Import
(C
, getpid
);
245 BIND_NO_INHERIT
: constant := 1;
249 cpu_mask
: unsigned_long
;
250 flag
: unsigned_long
:= BIND_NO_INHERIT
) return int
;
251 pragma Import
(C
, bind_to_cpu
);
257 type Thread_Body
is access
258 function (arg
: System
.Address
) return System
.Address
;
260 function Thread_Body_Access
is new
261 Unchecked_Conversion
(System
.Address
, Thread_Body
);
263 type pthread_t
is private;
264 subtype Thread_Id
is pthread_t
;
266 type pthread_mutex_t
is limited private;
267 type pthread_cond_t
is limited private;
268 type pthread_attr_t
is limited private;
269 type pthread_mutexattr_t
is limited private;
270 type pthread_condattr_t
is limited private;
271 type pthread_key_t
is private;
273 PTHREAD_CREATE_DETACHED
: constant := 1;
275 PTHREAD_SCOPE_PROCESS
: constant := 0;
276 PTHREAD_SCOPE_SYSTEM
: constant := 1;
278 PTHREAD_EXPLICIT_SCHED
: constant := 1;
284 Stack_Base_Available
: constant Boolean := False;
285 -- Indicates wether the stack base is available on this target.
287 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
288 pragma Inline
(Get_Stack_Base
);
289 -- returns the stack base of the specified thread.
290 -- Only call this function when Stack_Base_Available is True.
292 function Get_Page_Size
return size_t
;
293 function Get_Page_Size
return Address
;
294 pragma Import
(C
, Get_Page_Size
, "getpagesize");
295 -- returns the size of a page, or 0 if this is not relevant on this
298 PROT_NONE
: constant := 0;
299 PROT_READ
: constant := 1;
300 PROT_WRITE
: constant := 2;
301 PROT_EXEC
: constant := 4;
302 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
;
304 PROT_ON
: constant := PROT_READ
;
305 PROT_OFF
: constant := PROT_ALL
;
307 function mprotect
(addr
: Address
; len
: size_t
; prot
: int
) return int
;
308 pragma Import
(C
, mprotect
);
310 procedure Hide_Yellow_Zone
;
311 -- Every thread except the initial one features an overflow warning area
312 -- just above the overflow guard area on the stack. They are called
313 -- the Yellow Zone and the Red Zone respectively. This procedure hides
314 -- the former so that the latter could be exposed to stack probing.
316 ---------------------------------------
317 -- Nonstandard Thread Initialization --
318 ---------------------------------------
320 procedure pthread_init
;
321 pragma Inline
(pthread_init
);
322 -- This is a dummy procedure to share some GNULLI files
324 -------------------------
325 -- POSIX.1c Section 3 --
326 -------------------------
329 (set
: access sigset_t
;
330 sig
: access Signal
) return int
;
331 pragma Import
(C
, sigwait
, "__sigwaitd10");
333 function pthread_kill
335 sig
: Signal
) return int
;
336 pragma Import
(C
, pthread_kill
);
338 type sigset_t_ptr
is access all sigset_t
;
340 function pthread_sigmask
343 oset
: sigset_t_ptr
) return int
;
344 pragma Import
(C
, pthread_sigmask
);
346 --------------------------
347 -- POSIX.1c Section 11 --
348 --------------------------
350 function pthread_mutexattr_init
(attr
: access pthread_mutexattr_t
)
352 pragma Import
(C
, pthread_mutexattr_init
);
354 function pthread_mutexattr_destroy
355 (attr
: access pthread_mutexattr_t
) return int
;
356 pragma Import
(C
, pthread_mutexattr_destroy
);
358 function pthread_mutex_init
359 (mutex
: access pthread_mutex_t
;
360 attr
: access pthread_mutexattr_t
) return int
;
361 pragma Import
(C
, pthread_mutex_init
, "__pthread_mutex_init");
363 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
364 pragma Import
(C
, pthread_mutex_destroy
, "__pthread_mutex_destroy");
366 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
367 pragma Import
(C
, pthread_mutex_lock
, "__pthread_mutex_lock");
369 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
370 pragma Import
(C
, pthread_mutex_unlock
, "__pthread_mutex_unlock");
372 function pthread_condattr_init
373 (attr
: access pthread_condattr_t
) return int
;
374 pragma Import
(C
, pthread_condattr_init
);
376 function pthread_condattr_destroy
377 (attr
: access pthread_condattr_t
) return int
;
378 pragma Import
(C
, pthread_condattr_destroy
);
380 function pthread_cond_init
381 (cond
: access pthread_cond_t
;
382 attr
: access pthread_condattr_t
) return int
;
383 pragma Import
(C
, pthread_cond_init
, "__pthread_cond_init");
385 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
386 pragma Import
(C
, pthread_cond_destroy
, "__pthread_cond_destroy");
388 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
389 pragma Import
(C
, pthread_cond_signal
, "__pthread_cond_signal");
391 function pthread_cond_wait
392 (cond
: access pthread_cond_t
;
393 mutex
: access pthread_mutex_t
) return int
;
394 pragma Import
(C
, pthread_cond_wait
, "__pthread_cond_wait");
396 function pthread_cond_timedwait
397 (cond
: access pthread_cond_t
;
398 mutex
: access pthread_mutex_t
;
399 abstime
: access timespec
) return int
;
400 pragma Import
(C
, pthread_cond_timedwait
, "__pthread_cond_timedwait");
402 --------------------------
403 -- POSIX.1c Section 13 --
404 --------------------------
406 function pthread_mutexattr_setprotocol
407 (attr
: access pthread_mutexattr_t
;
408 protocol
: int
) return int
;
409 pragma Import
(C
, pthread_mutexattr_setprotocol
);
411 function pthread_mutexattr_setprioceiling
412 (attr
: access pthread_mutexattr_t
;
413 prioceiling
: int
) return int
;
414 pragma Import
(C
, pthread_mutexattr_setprioceiling
);
416 type struct_sched_param
is record
417 sched_priority
: int
; -- scheduling priority
420 function pthread_setschedparam
423 param
: access struct_sched_param
) return int
;
424 pragma Import
(C
, pthread_setschedparam
);
426 function pthread_attr_setscope
427 (attr
: access pthread_attr_t
;
428 contentionscope
: int
) return int
;
429 pragma Import
(C
, pthread_attr_setscope
);
431 function pthread_attr_setinheritsched
432 (attr
: access pthread_attr_t
;
433 inheritsched
: int
) return int
;
434 pragma Import
(C
, pthread_attr_setinheritsched
,
435 "__pthread_attr_setinheritsched");
437 function pthread_attr_setschedpolicy
438 (attr
: access pthread_attr_t
; policy
: int
) return int
;
439 pragma Import
(C
, pthread_attr_setschedpolicy
);
441 function pthread_attr_setschedparam
442 (attr
: access pthread_attr_t
;
443 sched_param
: access struct_sched_param
) return int
;
444 pragma Import
(C
, pthread_attr_setschedparam
);
446 function sched_yield
return int
;
447 pragma Import
(C
, sched_yield
);
449 --------------------------
450 -- P1003.1c Section 16 --
451 --------------------------
453 function pthread_attr_init
(attributes
: access pthread_attr_t
)
455 pragma Import
(C
, pthread_attr_init
);
457 function pthread_attr_destroy
(attributes
: access pthread_attr_t
)
459 pragma Import
(C
, pthread_attr_destroy
);
461 function pthread_attr_setdetachstate
462 (attr
: access pthread_attr_t
;
463 detachstate
: int
) return int
;
464 pragma Import
(C
, pthread_attr_setdetachstate
);
466 function pthread_attr_setstacksize
467 (attr
: access pthread_attr_t
;
468 stacksize
: size_t
) return int
;
469 pragma Import
(C
, pthread_attr_setstacksize
, "__pthread_attr_setstacksize");
471 function pthread_create
472 (thread
: access pthread_t
;
473 attributes
: access pthread_attr_t
;
474 start_routine
: Thread_Body
;
475 arg
: System
.Address
) return int
;
476 pragma Import
(C
, pthread_create
, "__pthread_create");
478 procedure pthread_exit
(status
: System
.Address
);
479 pragma Import
(C
, pthread_exit
, "__pthread_exit");
481 function pthread_self
return pthread_t
;
482 pragma Inline
(pthread_self
);
484 --------------------------
485 -- POSIX.1c Section 17 --
486 --------------------------
488 function pthread_setspecific
489 (key
: pthread_key_t
; value
: System
.Address
) return int
;
490 pragma Import
(C
, pthread_setspecific
, "__pthread_setspecific");
492 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
493 pragma Import
(C
, pthread_getspecific
, "__pthread_getspecific");
495 type destructor_pointer
is access procedure (arg
: System
.Address
);
497 function pthread_key_create
498 (key
: access pthread_key_t
;
499 destructor
: destructor_pointer
) return int
;
500 pragma Import
(C
, pthread_key_create
);
504 type sigset_t
is new unsigned_long
;
506 type pid_t
is new int
;
508 type time_t
is new int
;
510 type timespec
is record
514 pragma Convention
(C
, timespec
);
516 type clockid_t
is new int
;
517 CLOCK_REALTIME
: constant clockid_t
:= 1;
519 type struct_timeval
is record
523 pragma Convention
(C
, struct_timeval
);
525 type unsigned_long_array
is array (Natural range <>) of unsigned_long
;
527 type pthread_t
is new System
.Address
;
529 type pthread_teb_t
is record
530 reserved1
: System
.Address
;
531 reserved2
: System
.Address
;
532 size
: unsigned_short
;
533 version
: unsigned_char
;
534 reserved3
: unsigned_char
;
535 external
: unsigned_char
;
536 reserved4
: char_array
(0 .. 1);
537 creator
: unsigned_char
;
538 sequence
: unsigned_long
;
539 reserved5
: unsigned_long_array
(0 .. 1);
540 per_kt_area
: System
.Address
;
541 stack_base
: System
.Address
;
542 stack_reserve
: System
.Address
;
543 stack_yellow
: System
.Address
;
544 stack_guard
: System
.Address
;
545 stack_size
: unsigned_long
;
546 tsd_values
: System
.Address
;
547 tsd_count
: unsigned_long
;
548 reserved6
: unsigned
;
549 reserved7
: unsigned
;
550 thread_flags
: unsigned
;
552 stack_hiwater
: System
.Address
;
553 home_rad
: unsigned_long
;
555 pragma Convention
(C
, pthread_teb_t
);
557 type pthread_cond_t
is record
560 name
: System
.Address
;
562 reserved1
: unsigned
;
563 sequence
: unsigned_long
;
564 block
: System
.Address
;
566 pragma Convention
(C
, pthread_cond_t
);
568 type pthread_attr_t
is record
570 name
: System
.Address
;
572 reserved
: unsigned_long_array
(0 .. 18);
574 pragma Convention
(C
, pthread_attr_t
);
576 type pthread_mutex_t
is record
579 name
: System
.Address
;
582 sequence
: unsigned_long
;
583 owner
: unsigned_long
;
584 block
: System
.Address
;
586 for pthread_mutex_t
'Size use 8 * 48;
587 pragma Convention
(C
, pthread_mutex_t
);
589 type pthread_mutexattr_t
is record
591 reserved
: unsigned_long_array
(0 .. 14);
593 pragma Convention
(C
, pthread_mutexattr_t
);
595 type pthread_condattr_t
is record
597 reserved
: unsigned_long_array
(0 .. 12);
599 pragma Convention
(C
, pthread_condattr_t
);
601 type pthread_key_t
is new unsigned
;
603 end System
.OS_Interface
;