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) 1995-2006, 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 a LynxOS (Native) 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
("-mthreads");
51 subtype int
is Interfaces
.C
.int
;
52 subtype char
is Interfaces
.C
.char
;
53 subtype short
is Interfaces
.C
.short
;
54 subtype long
is Interfaces
.C
.long
;
55 subtype unsigned
is Interfaces
.C
.unsigned
;
56 subtype unsigned_short
is Interfaces
.C
.unsigned_short
;
57 subtype unsigned_long
is Interfaces
.C
.unsigned_long
;
58 subtype unsigned_char
is Interfaces
.C
.unsigned_char
;
59 subtype plain_char
is Interfaces
.C
.plain_char
;
60 subtype size_t
is Interfaces
.C
.size_t
;
66 function errno
return int
;
67 pragma Import
(C
, errno
, "__get_errno");
69 EAGAIN
: constant := 11;
70 EINTR
: constant := 4;
71 EINVAL
: constant := 22;
72 ENOMEM
: constant := 12;
73 ETIMEDOUT
: constant := 60;
79 Max_Interrupt
: constant := 63;
80 type Signal
is new int
range 0 .. Max_Interrupt
;
81 for Signal
'Size use int
'Size;
83 SIGHUP
: constant := 1; -- hangup
84 SIGINT
: constant := 2; -- interrupt (rubout)
85 SIGQUIT
: constant := 3; -- quit (ASCD FS)
86 SIGILL
: constant := 4; -- illegal instruction (not reset)
87 SIGTRAP
: constant := 5; -- trace trap (not reset)
88 SIGBRK
: constant := 6; -- break
89 SIGIOT
: constant := 6; -- IOT instruction
90 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
91 SIGCORE
: constant := 7; -- kill with core dump
92 SIGEMT
: constant := 7; -- EMT instruction
93 SIGFPE
: constant := 8; -- floating point exception
94 SIGKILL
: constant := 9; -- kill (cannot be caught or ignored)
95 SIGBUS
: constant := 10; -- bus error
96 SIGSEGV
: constant := 11; -- segmentation violation
97 SIGSYS
: constant := 12; -- bad argument to system call
98 SIGPIPE
: constant := 13; -- write on a pipe with no one to read it
99 SIGALRM
: constant := 14; -- alarm clock
100 SIGTERM
: constant := 15; -- software termination signal from kill
101 SIGURG
: constant := 16; -- urgent condition on IO channel
102 SIGSTOP
: constant := 17; -- stop (cannot be caught or ignored)
103 SIGTSTP
: constant := 18; -- user stop requested from tty
104 SIGCONT
: constant := 19; -- stopped process has been continued
105 SIGCLD
: constant := 20; -- alias for SIGCHLD
106 SIGCHLD
: constant := 20; -- child status change
107 SIGTTIN
: constant := 21; -- background tty read attempted
108 SIGTTOU
: constant := 22; -- background tty write attempted
109 SIGIO
: constant := 23; -- I/O possible (Solaris SIGPOLL alias)
110 SIGPOLL
: constant := 23; -- pollable event occurred
111 SIGXCPU
: constant := 24; -- CPU time limit exceeded
112 SIGXFSZ
: constant := 25; -- filesize limit exceeded
113 SIGVTALRM
: constant := 26; -- virtual timer expired
114 SIGPROF
: constant := 27; -- profiling timer expired
115 SIGWINCH
: constant := 28; -- window size change
116 SIGLOST
: constant := 29; -- SUN 4.1 compatibility
117 SIGUSR1
: constant := 30; -- user defined signal 1
118 SIGUSR2
: constant := 31; -- user defined signal 2
119 SIGPRIO
: constant := 32; -- sent to a process with its priority or
122 SIGADAABORT
: constant := SIGABRT
;
123 -- Change this if you want to use another signal for task abort.
124 -- SIGTERM might be a good one.
126 type Signal_Set
is array (Natural range <>) of Signal
;
128 Unmasked
: constant Signal_Set
:=
129 (SIGTRAP
, SIGTTIN
, SIGTTOU
, SIGTSTP
, SIGPROF
);
130 Reserved
: constant Signal_Set
:= (SIGABRT
, SIGKILL
, SIGSTOP
, SIGPRIO
);
132 type sigset_t
is private;
134 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
135 pragma Import
(C
, sigaddset
, "sigaddset");
137 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
138 pragma Import
(C
, sigdelset
, "sigdelset");
140 function sigfillset
(set
: access sigset_t
) return int
;
141 pragma Import
(C
, sigfillset
, "sigfillset");
143 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
144 pragma Import
(C
, sigismember
, "sigismember");
146 function sigemptyset
(set
: access sigset_t
) return int
;
147 pragma Import
(C
, sigemptyset
, "sigemptyset");
149 type struct_sigaction
is record
150 sa_handler
: System
.Address
;
154 pragma Convention
(C
, struct_sigaction
);
155 type struct_sigaction_ptr
is access all struct_sigaction
;
157 SA_SIGINFO
: constant := 16#
80#
;
159 SIG_BLOCK
: constant := 0;
160 SIG_UNBLOCK
: constant := 1;
161 SIG_SETMASK
: constant := 2;
163 SIG_DFL
: constant := 0;
164 SIG_IGN
: 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 := True;
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 pragma Inline
(clock_gettime
);
189 -- LynxOS has non standard clock_gettime
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 := 16#
00200000#
;
219 SCHED_RR
: constant := 16#
00100000#
;
220 SCHED_OTHER
: constant := 16#
00400000#
;
222 function To_Target_Priority
223 (Prio
: System
.Any_Priority
) return Interfaces
.C
.int
;
224 -- Maps System.Any_Priority to a POSIX priority.
230 type pid_t
is private;
232 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
233 pragma Import
(C
, kill
, "kill");
235 function getpid
return pid_t
;
236 pragma Import
(C
, getpid
, "getpid");
242 function lwp_self
return System
.Address
;
243 -- lwp_self does not exist on this thread library, revert to pthread_self
244 -- which is the closest approximation (with getpid). This function is
245 -- needed to share 7staprop.adb across POSIX-like targets.
246 pragma Import
(C
, lwp_self
, "pthread_self");
252 type Thread_Body
is access
253 function (arg
: System
.Address
) return System
.Address
;
255 function Thread_Body_Access
is new
256 Unchecked_Conversion
(System
.Address
, Thread_Body
);
258 type pthread_t
is private;
259 subtype Thread_Id
is pthread_t
;
261 type pthread_mutex_t
is limited private;
262 type pthread_cond_t
is limited private;
263 type st_t
is limited private;
264 type pthread_attr_t
is limited private;
265 type pthread_mutexattr_t
is limited private;
266 type pthread_condattr_t
is limited private;
267 type pthread_key_t
is private;
269 PTHREAD_CREATE_DETACHED
: constant := 0;
275 Stack_Base_Available
: constant Boolean := False;
276 -- Indicates wether the stack base is available on this target.
278 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
279 pragma Inline
(Get_Stack_Base
);
280 -- returns the stack base of the specified thread.
281 -- Only call this function when Stack_Base_Available is True.
283 function Get_Page_Size
return size_t
;
284 function Get_Page_Size
return Address
;
285 pragma Import
(C
, Get_Page_Size
, "getpagesize");
286 -- returns the size of a page, or 0 if this is not relevant on this
289 PROT_NONE
: constant := 0;
290 PROT_READ
: constant := 1;
291 PROT_WRITE
: constant := 2;
292 PROT_EXEC
: constant := 4;
293 PROT_USER
: constant := 8;
294 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
+ PROT_USER
;
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 -------------------------
303 -- POSIX.1c Section 3 --
304 -------------------------
307 (set
: access sigset_t
;
308 sig
: access Signal
) return int
;
309 pragma Inline
(sigwait
);
310 -- LynxOS has non standard sigwait
312 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
313 pragma Import
(C
, pthread_kill
, "pthread_kill");
315 function pthread_sigmask
317 set
: access sigset_t
;
318 oset
: access sigset_t
) return int
;
319 pragma Import
(C
, pthread_sigmask
, "sigprocmask");
321 --------------------------
322 -- POSIX.1c Section 11 --
323 --------------------------
325 function pthread_mutexattr_init
326 (attr
: access pthread_mutexattr_t
) return int
;
327 pragma Inline
(pthread_mutexattr_init
);
328 -- LynxOS has a nonstandard pthread_mutexattr_init
330 function pthread_mutexattr_destroy
331 (attr
: access pthread_mutexattr_t
) return int
;
332 pragma Inline
(pthread_mutexattr_destroy
);
333 -- Lynxos has a nonstandard pthread_mutexattr_destroy
335 function pthread_mutex_init
336 (mutex
: access pthread_mutex_t
;
337 attr
: access pthread_mutexattr_t
) return int
;
338 pragma Inline
(pthread_mutex_init
);
339 -- LynxOS has a nonstandard pthread_mutex_init
341 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
342 pragma Inline
(pthread_mutex_destroy
);
343 -- LynxOS has a nonstandard pthread_mutex_destroy
345 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
346 pragma Inline
(pthread_mutex_lock
);
347 -- LynxOS has a nonstandard pthread_mutex_lock
349 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
350 pragma Inline
(pthread_mutex_unlock
);
351 -- LynxOS has a nonstandard pthread_mutex_unlock
353 function pthread_condattr_init
354 (attr
: access pthread_condattr_t
) return int
;
355 pragma Inline
(pthread_condattr_init
);
356 -- LynxOS has a nonstandard pthread_condattr_init
358 function pthread_condattr_destroy
359 (attr
: access pthread_condattr_t
) return int
;
360 pragma Inline
(pthread_condattr_destroy
);
361 -- LynxOS has a nonstandard pthread_condattr_destroy
363 function pthread_cond_init
364 (cond
: access pthread_cond_t
;
365 attr
: access pthread_condattr_t
) return int
;
366 pragma Inline
(pthread_cond_init
);
367 -- LynxOS has a non standard pthread_cond_init
369 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
370 pragma Inline
(pthread_cond_destroy
);
371 -- LynxOS has a nonstandard pthread_cond_destroy
373 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
374 pragma Inline
(pthread_cond_signal
);
375 -- LynxOS has a nonstandard pthread_cond_signal
377 function pthread_cond_wait
378 (cond
: access pthread_cond_t
;
379 mutex
: access pthread_mutex_t
) return int
;
380 pragma Inline
(pthread_cond_wait
);
381 -- LynxOS has a nonstandard pthread_cond_wait
383 function pthread_cond_timedwait
384 (cond
: access pthread_cond_t
;
385 mutex
: access pthread_mutex_t
;
386 reltime
: access timespec
) return int
;
387 pragma Inline
(pthread_cond_timedwait
);
388 -- LynxOS has a nonstandard pthrad_cond_timedwait
390 Relative_Timed_Wait
: constant Boolean := True;
391 -- pthread_cond_timedwait requires a relative delay time
393 --------------------------
394 -- POSIX.1c Section 13 --
395 --------------------------
397 PTHREAD_PRIO_NONE
: constant := 0;
398 PTHREAD_PRIO_INHERIT
: constant := 0;
399 PTHREAD_PRIO_PROTECT
: constant := 0;
401 type struct_sched_param
is record
402 sched_priority
: int
; -- scheduling priority
405 function pthread_setschedparam
408 param
: access struct_sched_param
) return int
;
409 pragma Inline
(pthread_setschedparam
);
410 -- LynxOS doesn't have pthread_setschedparam.
411 -- Instead, use pthread_setscheduler
413 function pthread_mutexattr_setprotocol
414 (attr
: access pthread_mutexattr_t
;
415 protocol
: int
) return int
;
416 pragma Inline
(pthread_mutexattr_setprotocol
);
417 -- LynxOS doesn't have pthread_mutexattr_setprotocol
419 function pthread_mutexattr_setprioceiling
420 (attr
: access pthread_mutexattr_t
;
421 prioceiling
: int
) return int
;
422 pragma Inline
(pthread_mutexattr_setprioceiling
);
423 -- LynxOS doesn't have pthread_mutexattr_setprioceiling
425 function pthread_attr_setscope
426 (attr
: access pthread_attr_t
;
427 contentionscope
: int
) return int
;
428 -- LynxOS doesn't have pthread_attr_setscope: all threads have system scope
429 pragma Inline
(pthread_attr_setscope
);
431 function pthread_attr_setschedpolicy
432 (attr
: access pthread_attr_t
;
433 policy
: int
) return int
;
434 pragma Import
(C
, pthread_attr_setschedpolicy
, "pthread_attr_setsched");
436 function sched_yield
return int
;
437 -- pragma Import (C, sched_yield, "sched_yield");
438 pragma Inline
(sched_yield
);
440 ---------------------------
441 -- P1003.1c - Section 16 --
442 ---------------------------
444 function pthread_attr_init
(attributes
: access pthread_attr_t
) return int
;
445 pragma Import
(C
, pthread_attr_init
, "pthread_attr_create");
447 function pthread_attr_destroy
448 (attributes
: access pthread_attr_t
) return int
;
449 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_delete");
451 function pthread_attr_setdetachstate
452 (attr
: access pthread_attr_t
;
453 detachstate
: int
) return int
;
454 pragma Inline
(pthread_attr_setdetachstate
);
455 -- LynxOS doesn't have pthread_attr_setdetachstate
457 function pthread_attr_setstacksize
458 (attr
: access pthread_attr_t
;
459 stacksize
: size_t
) return int
;
460 pragma Import
(C
, pthread_attr_setstacksize
, "pthread_attr_setstacksize");
462 function pthread_create
463 (thread
: access pthread_t
;
464 attributes
: access pthread_attr_t
;
465 start_routine
: Thread_Body
;
466 arg
: System
.Address
) return int
;
467 pragma Inline
(pthread_create
);
468 -- LynxOS has a non standard pthread_create
470 function pthread_detach
(thread
: pthread_t
) return int
;
471 pragma Inline
(pthread_detach
);
473 procedure pthread_exit
(status
: System
.Address
);
474 pragma Import
(C
, pthread_exit
, "pthread_exit");
476 function pthread_self
return pthread_t
;
477 pragma Import
(C
, pthread_self
, "pthread_self");
479 --------------------------
480 -- POSIX.1c Section 17 --
481 --------------------------
483 function pthread_setspecific
484 (key
: pthread_key_t
;
485 value
: System
.Address
) return int
;
486 pragma Inline
(pthread_setspecific
);
487 -- LynxOS has a non standard pthread_setspecific
489 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
490 pragma Inline
(pthread_getspecific
);
491 -- LynxOS has a non standard pthread_getspecific
493 type destructor_pointer
is access procedure (arg
: System
.Address
);
495 function pthread_key_create
496 (key
: access pthread_key_t
;
497 destructor
: destructor_pointer
) return int
;
498 pragma Inline
(pthread_key_create
);
499 -- LynxOS has a non standard pthread_keycreate
501 procedure pthread_init
;
502 -- This is a dummy procedure to share some GNULLI files
506 type sigbit_array
is array (1 .. 2) of long
;
507 type sigset_t
is record
508 sa_sigbits
: sigbit_array
;
510 pragma Convention
(C_Pass_By_Copy
, sigset_t
);
512 type pid_t
is new long
;
514 type time_t
is new long
;
516 type timespec
is record
520 pragma Convention
(C
, timespec
);
522 type clockid_t
is new unsigned_char
;
523 CLOCK_REALTIME
: constant clockid_t
:= 0;
525 type struct_timeval
is record
529 pragma Convention
(C
, struct_timeval
);
538 pragma Convention
(C
, st_t
);
540 type pthread_attr_t
is record
542 pthread_attr_scope
: int
; -- ignored
544 pragma Convention
(C
, pthread_attr_t
);
546 type pthread_condattr_t
is new int
;
548 type pthread_mutexattr_t
is new int
;
550 type tid_t
is new short
;
551 type pthread_t
is new tid_t
;
553 type synch_ptr
is access all pthread_mutex_t
;
554 type pthread_mutex_t
is record
560 pragma Convention
(C
, pthread_mutex_t
);
562 type pthread_cond_t
is new pthread_mutex_t
;
564 type pthread_key_t
is new int
;
566 end System
.OS_Interface
;