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) 1995-2007, 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 Ada
.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 -------------------------
205 -- Priority Scheduling --
206 -------------------------
208 SCHED_FIFO
: constant := 16#
00200000#
;
209 SCHED_RR
: constant := 16#
00100000#
;
210 SCHED_OTHER
: constant := 16#
00400000#
;
212 function To_Target_Priority
213 (Prio
: System
.Any_Priority
) return Interfaces
.C
.int
;
214 -- Maps System.Any_Priority to a POSIX priority
220 type pid_t
is private;
222 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
223 pragma Import
(C
, kill
, "kill");
225 function getpid
return pid_t
;
226 pragma Import
(C
, getpid
, "getpid");
232 function lwp_self
return System
.Address
;
233 -- lwp_self does not exist on this thread library, revert to pthread_self
234 -- which is the closest approximation (with getpid). This function is
235 -- needed to share 7staprop.adb across POSIX-like targets.
236 pragma Import
(C
, lwp_self
, "pthread_self");
242 type Thread_Body
is access
243 function (arg
: System
.Address
) return System
.Address
;
244 pragma Convention
(C
, Thread_Body
);
246 function Thread_Body_Access
is new
247 Ada
.Unchecked_Conversion
(System
.Address
, Thread_Body
);
249 type pthread_t
is private;
250 subtype Thread_Id
is pthread_t
;
252 type pthread_mutex_t
is limited private;
253 type pthread_cond_t
is limited private;
254 type st_t
is limited private;
255 type pthread_attr_t
is limited private;
256 type pthread_mutexattr_t
is limited private;
257 type pthread_condattr_t
is limited private;
258 type pthread_key_t
is private;
260 PTHREAD_CREATE_DETACHED
: constant := 0;
262 PTHREAD_SCOPE_PROCESS
: constant := 0;
263 PTHREAD_SCOPE_SYSTEM
: constant := 1;
269 Stack_Base_Available
: constant Boolean := False;
270 -- Indicates wether the stack base is available on this target
272 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
273 pragma Inline
(Get_Stack_Base
);
274 -- returns the stack base of the specified thread.
275 -- Only call this function when Stack_Base_Available is True.
277 function Get_Page_Size
return size_t
;
278 function Get_Page_Size
return Address
;
279 pragma Import
(C
, Get_Page_Size
, "getpagesize");
280 -- returns the size of a page, or 0 if this is not relevant on this
283 PROT_NONE
: constant := 0;
284 PROT_READ
: constant := 1;
285 PROT_WRITE
: constant := 2;
286 PROT_EXEC
: constant := 4;
287 PROT_USER
: constant := 8;
288 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
+ PROT_USER
;
290 PROT_ON
: constant := PROT_READ
;
291 PROT_OFF
: constant := PROT_ALL
;
293 function mprotect
(addr
: Address
; len
: size_t
; prot
: int
) return int
;
294 pragma Import
(C
, mprotect
);
296 -------------------------
297 -- POSIX.1c Section 3 --
298 -------------------------
301 (set
: access sigset_t
;
302 sig
: access Signal
) return int
;
303 pragma Inline
(sigwait
);
304 -- LynxOS has non standard sigwait
306 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
307 pragma Import
(C
, pthread_kill
, "pthread_kill");
309 function pthread_sigmask
311 set
: access sigset_t
;
312 oset
: access sigset_t
) return int
;
313 pragma Import
(C
, pthread_sigmask
, "sigprocmask");
315 --------------------------
316 -- POSIX.1c Section 11 --
317 --------------------------
319 function pthread_mutexattr_init
320 (attr
: access pthread_mutexattr_t
) return int
;
321 pragma Inline
(pthread_mutexattr_init
);
322 -- LynxOS has a nonstandard pthread_mutexattr_init
324 function pthread_mutexattr_destroy
325 (attr
: access pthread_mutexattr_t
) return int
;
326 pragma Inline
(pthread_mutexattr_destroy
);
327 -- Lynxos has a nonstandard pthread_mutexattr_destroy
329 function pthread_mutex_init
330 (mutex
: access pthread_mutex_t
;
331 attr
: access pthread_mutexattr_t
) return int
;
332 pragma Inline
(pthread_mutex_init
);
333 -- LynxOS has a nonstandard pthread_mutex_init
335 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
336 pragma Inline
(pthread_mutex_destroy
);
337 -- LynxOS has a nonstandard pthread_mutex_destroy
339 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
340 pragma Inline
(pthread_mutex_lock
);
341 -- LynxOS has a nonstandard pthread_mutex_lock
343 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
344 pragma Inline
(pthread_mutex_unlock
);
345 -- LynxOS has a nonstandard pthread_mutex_unlock
347 function pthread_condattr_init
348 (attr
: access pthread_condattr_t
) return int
;
349 pragma Inline
(pthread_condattr_init
);
350 -- LynxOS has a nonstandard pthread_condattr_init
352 function pthread_condattr_destroy
353 (attr
: access pthread_condattr_t
) return int
;
354 pragma Inline
(pthread_condattr_destroy
);
355 -- LynxOS has a nonstandard pthread_condattr_destroy
357 function pthread_cond_init
358 (cond
: access pthread_cond_t
;
359 attr
: access pthread_condattr_t
) return int
;
360 pragma Inline
(pthread_cond_init
);
361 -- LynxOS has a non standard pthread_cond_init
363 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
364 pragma Inline
(pthread_cond_destroy
);
365 -- LynxOS has a nonstandard pthread_cond_destroy
367 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
368 pragma Inline
(pthread_cond_signal
);
369 -- LynxOS has a nonstandard pthread_cond_signal
371 function pthread_cond_wait
372 (cond
: access pthread_cond_t
;
373 mutex
: access pthread_mutex_t
) return int
;
374 pragma Inline
(pthread_cond_wait
);
375 -- LynxOS has a nonstandard pthread_cond_wait
377 function pthread_cond_timedwait
378 (cond
: access pthread_cond_t
;
379 mutex
: access pthread_mutex_t
;
380 reltime
: access timespec
) return int
;
381 pragma Inline
(pthread_cond_timedwait
);
382 -- LynxOS has a nonstandard pthrad_cond_timedwait
384 Relative_Timed_Wait
: constant Boolean := True;
385 -- pthread_cond_timedwait requires a relative delay time
387 --------------------------
388 -- POSIX.1c Section 13 --
389 --------------------------
391 PTHREAD_PRIO_NONE
: constant := 0;
392 PTHREAD_PRIO_INHERIT
: constant := 0;
393 PTHREAD_PRIO_PROTECT
: constant := 0;
395 type struct_sched_param
is record
396 sched_priority
: int
; -- scheduling priority
399 function pthread_setschedparam
402 param
: access struct_sched_param
) return int
;
403 pragma Inline
(pthread_setschedparam
);
404 -- LynxOS doesn't have pthread_setschedparam.
405 -- Instead, use pthread_setscheduler
407 function pthread_mutexattr_setprotocol
408 (attr
: access pthread_mutexattr_t
;
409 protocol
: int
) return int
;
410 pragma Inline
(pthread_mutexattr_setprotocol
);
411 -- LynxOS doesn't have pthread_mutexattr_setprotocol
413 function pthread_mutexattr_setprioceiling
414 (attr
: access pthread_mutexattr_t
;
415 prioceiling
: int
) return int
;
416 pragma Inline
(pthread_mutexattr_setprioceiling
);
417 -- LynxOS doesn't have pthread_mutexattr_setprioceiling
419 function pthread_attr_setscope
420 (attr
: access pthread_attr_t
;
421 contentionscope
: int
) return int
;
422 -- LynxOS doesn't have pthread_attr_setscope: all threads have system scope
423 pragma Inline
(pthread_attr_setscope
);
425 function pthread_attr_setschedpolicy
426 (attr
: access pthread_attr_t
;
427 policy
: int
) return int
;
428 pragma Import
(C
, pthread_attr_setschedpolicy
, "pthread_attr_setsched");
430 function sched_yield
return int
;
431 -- pragma Import (C, sched_yield, "sched_yield");
432 pragma Inline
(sched_yield
);
434 ---------------------------
435 -- P1003.1c - Section 16 --
436 ---------------------------
438 function pthread_attr_init
(attributes
: access pthread_attr_t
) return int
;
439 pragma Import
(C
, pthread_attr_init
, "pthread_attr_create");
441 function pthread_attr_destroy
442 (attributes
: access pthread_attr_t
) return int
;
443 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_delete");
445 function pthread_attr_setdetachstate
446 (attr
: access pthread_attr_t
;
447 detachstate
: int
) return int
;
448 pragma Inline
(pthread_attr_setdetachstate
);
449 -- LynxOS doesn't have pthread_attr_setdetachstate
451 function pthread_attr_setstacksize
452 (attr
: access pthread_attr_t
;
453 stacksize
: size_t
) return int
;
454 pragma Import
(C
, pthread_attr_setstacksize
, "pthread_attr_setstacksize");
456 function pthread_create
457 (thread
: access pthread_t
;
458 attributes
: access pthread_attr_t
;
459 start_routine
: Thread_Body
;
460 arg
: System
.Address
) return int
;
461 pragma Inline
(pthread_create
);
462 -- LynxOS has a non standard pthread_create
464 function pthread_detach
(thread
: pthread_t
) return int
;
465 pragma Inline
(pthread_detach
);
467 procedure pthread_exit
(status
: System
.Address
);
468 pragma Import
(C
, pthread_exit
, "pthread_exit");
470 function pthread_self
return pthread_t
;
471 pragma Import
(C
, pthread_self
, "pthread_self");
473 --------------------------
474 -- POSIX.1c Section 17 --
475 --------------------------
477 function pthread_setspecific
478 (key
: pthread_key_t
;
479 value
: System
.Address
) return int
;
480 pragma Inline
(pthread_setspecific
);
481 -- LynxOS has a non standard pthread_setspecific
483 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
484 pragma Inline
(pthread_getspecific
);
485 -- LynxOS has a non standard 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 Inline
(pthread_key_create
);
494 -- LynxOS has a non standard pthread_keycreate
496 procedure pthread_init
;
497 -- This is a dummy procedure to share some GNULLI files
501 type sigbit_array
is array (1 .. 2) of long
;
502 type sigset_t
is record
503 sa_sigbits
: sigbit_array
;
505 pragma Convention
(C_Pass_By_Copy
, sigset_t
);
507 type pid_t
is new long
;
509 type time_t
is new long
;
511 type timespec
is record
515 pragma Convention
(C
, timespec
);
517 type clockid_t
is new unsigned_char
;
518 CLOCK_REALTIME
: constant clockid_t
:= 0;
527 pragma Convention
(C
, st_t
);
529 type pthread_attr_t
is record
531 pthread_attr_scope
: int
; -- ignored
533 pragma Convention
(C
, pthread_attr_t
);
535 type pthread_condattr_t
is new int
;
537 type pthread_mutexattr_t
is new int
;
539 type tid_t
is new short
;
540 type pthread_t
is new tid_t
;
542 type synch_ptr
is access all pthread_mutex_t
;
543 type pthread_mutex_t
is record
549 pragma Convention
(C
, pthread_mutex_t
);
551 type pthread_cond_t
is new pthread_mutex_t
;
553 type pthread_key_t
is new int
;
555 end System
.OS_Interface
;