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) 1995-2008, 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 the tasking run-time (libgnarl).
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.
43 with Ada
.Unchecked_Conversion
;
47 package System
.OS_Interface
is
50 pragma Linker_Options
("-mthreads");
52 subtype int
is Interfaces
.C
.int
;
53 subtype char
is Interfaces
.C
.char
;
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
;
67 function errno
return int
;
68 pragma Import
(C
, errno
, "__get_errno");
70 EAGAIN
: constant := 11;
71 EINTR
: constant := 4;
72 EINVAL
: constant := 22;
73 ENOMEM
: constant := 12;
74 ETIMEDOUT
: constant := 60;
80 Max_Interrupt
: constant := 63;
81 type Signal
is new int
range 0 .. Max_Interrupt
;
82 for Signal
'Size use int
'Size;
84 SIGHUP
: constant := 1; -- hangup
85 SIGINT
: constant := 2; -- interrupt (rubout)
86 SIGQUIT
: constant := 3; -- quit (ASCD FS)
87 SIGILL
: constant := 4; -- illegal instruction (not reset)
88 SIGTRAP
: constant := 5; -- trace trap (not reset)
89 SIGBRK
: constant := 6; -- break
90 SIGIOT
: constant := 6; -- IOT instruction
91 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
92 SIGCORE
: constant := 7; -- kill with core dump
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 SIGSTOP
: constant := 17; -- stop (cannot be caught or ignored)
104 SIGTSTP
: constant := 18; -- user stop requested from tty
105 SIGCONT
: constant := 19; -- stopped process has been continued
106 SIGCLD
: constant := 20; -- alias for SIGCHLD
107 SIGCHLD
: constant := 20; -- child status change
108 SIGTTIN
: constant := 21; -- background tty read attempted
109 SIGTTOU
: constant := 22; -- background tty write attempted
110 SIGIO
: constant := 23; -- I/O possible (Solaris SIGPOLL alias)
111 SIGPOLL
: constant := 23; -- pollable event occurred
112 SIGXCPU
: constant := 24; -- CPU time limit exceeded
113 SIGXFSZ
: constant := 25; -- filesize limit exceeded
114 SIGVTALRM
: constant := 26; -- virtual timer expired
115 SIGPROF
: constant := 27; -- profiling timer expired
116 SIGWINCH
: constant := 28; -- window size change
117 SIGLOST
: constant := 29; -- SUN 4.1 compatibility
118 SIGUSR1
: constant := 30; -- user defined signal 1
119 SIGUSR2
: constant := 31; -- user defined signal 2
120 SIGPRIO
: constant := 32; -- sent to a process with its priority or
123 SIGADAABORT
: constant := SIGABRT
;
124 -- Change this if you want to use another signal for task abort.
125 -- SIGTERM might be a good one.
127 type Signal_Set
is array (Natural range <>) of Signal
;
129 Unmasked
: constant Signal_Set
:=
130 (SIGTRAP
, SIGTTIN
, SIGTTOU
, SIGTSTP
, SIGPROF
);
131 Reserved
: constant Signal_Set
:= (SIGABRT
, SIGKILL
, SIGSTOP
, SIGPRIO
);
133 type sigset_t
is private;
135 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
136 pragma Import
(C
, sigaddset
, "sigaddset");
138 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
139 pragma Import
(C
, sigdelset
, "sigdelset");
141 function sigfillset
(set
: access sigset_t
) return int
;
142 pragma Import
(C
, sigfillset
, "sigfillset");
144 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
145 pragma Import
(C
, sigismember
, "sigismember");
147 function sigemptyset
(set
: access sigset_t
) return int
;
148 pragma Import
(C
, sigemptyset
, "sigemptyset");
150 type struct_sigaction
is record
151 sa_handler
: System
.Address
;
155 pragma Convention
(C
, struct_sigaction
);
156 type struct_sigaction_ptr
is access all struct_sigaction
;
158 SA_SIGINFO
: constant := 16#
80#
;
160 SIG_BLOCK
: constant := 0;
161 SIG_UNBLOCK
: constant := 1;
162 SIG_SETMASK
: constant := 2;
164 SIG_DFL
: constant := 0;
165 SIG_IGN
: constant := 1;
169 act
: struct_sigaction_ptr
;
170 oact
: struct_sigaction_ptr
) return int
;
171 pragma Import
(C
, sigaction
, "sigaction");
177 Time_Slice_Supported
: constant Boolean := True;
178 -- Indicates whether time slicing is supported
180 type timespec
is private;
182 type clockid_t
is private;
184 CLOCK_REALTIME
: constant clockid_t
;
186 function clock_gettime
187 (clock_id
: clockid_t
;
188 tp
: access timespec
) return int
;
189 pragma Inline
(clock_gettime
);
190 -- LynxOS has non standard clock_gettime
192 function To_Duration
(TS
: timespec
) return Duration;
193 pragma Inline
(To_Duration
);
195 function To_Timespec
(D
: Duration) return timespec
;
196 pragma Inline
(To_Timespec
);
198 type struct_timezone
is record
199 tz_minuteswest
: int
;
202 pragma Convention
(C
, struct_timezone
);
203 type struct_timezone_ptr
is access all struct_timezone
;
205 -------------------------
206 -- Priority Scheduling --
207 -------------------------
209 SCHED_FIFO
: constant := 16#
00200000#
;
210 SCHED_RR
: constant := 16#
00100000#
;
211 SCHED_OTHER
: constant := 16#
00400000#
;
213 function To_Target_Priority
214 (Prio
: System
.Any_Priority
) return Interfaces
.C
.int
;
215 -- Maps System.Any_Priority to a POSIX priority
221 type pid_t
is private;
223 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
224 pragma Import
(C
, kill
, "kill");
226 function getpid
return pid_t
;
227 pragma Import
(C
, getpid
, "getpid");
233 function lwp_self
return System
.Address
;
234 -- lwp_self does not exist on this thread library, revert to pthread_self
235 -- which is the closest approximation (with getpid). This function is
236 -- needed to share 7staprop.adb across POSIX-like targets.
237 pragma Import
(C
, lwp_self
, "pthread_self");
243 type Thread_Body
is access
244 function (arg
: System
.Address
) return System
.Address
;
245 pragma Convention
(C
, Thread_Body
);
247 function Thread_Body_Access
is new
248 Ada
.Unchecked_Conversion
(System
.Address
, Thread_Body
);
250 type pthread_t
is private;
251 subtype Thread_Id
is pthread_t
;
253 type pthread_mutex_t
is limited private;
254 type pthread_cond_t
is limited private;
255 type st_t
is limited private;
256 type pthread_attr_t
is limited private;
257 type pthread_mutexattr_t
is limited private;
258 type pthread_condattr_t
is limited private;
259 type pthread_key_t
is private;
261 PTHREAD_CREATE_DETACHED
: constant := 0;
263 PTHREAD_SCOPE_PROCESS
: constant := 0;
264 PTHREAD_SCOPE_SYSTEM
: constant := 1;
270 Alternate_Stack_Size
: constant := 0;
271 -- No alternate signal stack is used on this platform
273 Stack_Base_Available
: constant Boolean := False;
274 -- Indicates whether the stack base is available on this target
276 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
277 pragma Inline
(Get_Stack_Base
);
278 -- returns the stack base of the specified thread.
279 -- Only call this function when Stack_Base_Available is True.
281 function Get_Page_Size
return size_t
;
282 function Get_Page_Size
return Address
;
283 pragma Import
(C
, Get_Page_Size
, "getpagesize");
284 -- returns the size of a page, or 0 if this is not relevant on this
287 PROT_NONE
: constant := 0;
288 PROT_READ
: constant := 1;
289 PROT_WRITE
: constant := 2;
290 PROT_EXEC
: constant := 4;
291 PROT_USER
: constant := 8;
292 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
+ PROT_USER
;
294 PROT_ON
: constant := PROT_READ
;
295 PROT_OFF
: constant := PROT_ALL
;
297 function mprotect
(addr
: Address
; len
: size_t
; prot
: int
) return int
;
298 pragma Import
(C
, mprotect
);
300 -------------------------
301 -- POSIX.1c Section 3 --
302 -------------------------
305 (set
: access sigset_t
;
306 sig
: access Signal
) return int
;
307 pragma Inline
(sigwait
);
308 -- LynxOS has non standard sigwait
310 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
311 pragma Import
(C
, pthread_kill
, "pthread_kill");
313 function pthread_sigmask
315 set
: access sigset_t
;
316 oset
: access sigset_t
) return int
;
317 pragma Import
(C
, pthread_sigmask
, "sigprocmask");
319 --------------------------
320 -- POSIX.1c Section 11 --
321 --------------------------
323 function pthread_mutexattr_init
324 (attr
: access pthread_mutexattr_t
) return int
;
325 pragma Inline
(pthread_mutexattr_init
);
326 -- LynxOS has a nonstandard pthread_mutexattr_init
328 function pthread_mutexattr_destroy
329 (attr
: access pthread_mutexattr_t
) return int
;
330 pragma Inline
(pthread_mutexattr_destroy
);
331 -- Lynxos has a nonstandard pthread_mutexattr_destroy
333 function pthread_mutex_init
334 (mutex
: access pthread_mutex_t
;
335 attr
: access pthread_mutexattr_t
) return int
;
336 pragma Inline
(pthread_mutex_init
);
337 -- LynxOS has a nonstandard pthread_mutex_init
339 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
340 pragma Inline
(pthread_mutex_destroy
);
341 -- LynxOS has a nonstandard pthread_mutex_destroy
343 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
344 pragma Inline
(pthread_mutex_lock
);
345 -- LynxOS has a nonstandard pthread_mutex_lock
347 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
348 pragma Inline
(pthread_mutex_unlock
);
349 -- LynxOS has a nonstandard pthread_mutex_unlock
351 function pthread_condattr_init
352 (attr
: access pthread_condattr_t
) return int
;
353 pragma Inline
(pthread_condattr_init
);
354 -- LynxOS has a nonstandard pthread_condattr_init
356 function pthread_condattr_destroy
357 (attr
: access pthread_condattr_t
) return int
;
358 pragma Inline
(pthread_condattr_destroy
);
359 -- LynxOS has a nonstandard pthread_condattr_destroy
361 function pthread_cond_init
362 (cond
: access pthread_cond_t
;
363 attr
: access pthread_condattr_t
) return int
;
364 pragma Inline
(pthread_cond_init
);
365 -- LynxOS has a non standard pthread_cond_init
367 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
368 pragma Inline
(pthread_cond_destroy
);
369 -- LynxOS has a nonstandard pthread_cond_destroy
371 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
372 pragma Inline
(pthread_cond_signal
);
373 -- LynxOS has a nonstandard pthread_cond_signal
375 function pthread_cond_wait
376 (cond
: access pthread_cond_t
;
377 mutex
: access pthread_mutex_t
) return int
;
378 pragma Inline
(pthread_cond_wait
);
379 -- LynxOS has a nonstandard pthread_cond_wait
381 function pthread_cond_timedwait
382 (cond
: access pthread_cond_t
;
383 mutex
: access pthread_mutex_t
;
384 reltime
: access timespec
) return int
;
385 pragma Inline
(pthread_cond_timedwait
);
386 -- LynxOS has a nonstandard pthread_cond_timedwait
388 Relative_Timed_Wait
: constant Boolean := True;
389 -- pthread_cond_timedwait requires a relative delay time
391 --------------------------
392 -- POSIX.1c Section 13 --
393 --------------------------
395 PTHREAD_PRIO_NONE
: constant := 0;
396 PTHREAD_PRIO_INHERIT
: constant := 0;
397 PTHREAD_PRIO_PROTECT
: constant := 0;
399 type struct_sched_param
is record
400 sched_priority
: int
; -- scheduling priority
403 function pthread_setschedparam
406 param
: access struct_sched_param
) return int
;
407 pragma Inline
(pthread_setschedparam
);
408 -- LynxOS doesn't have pthread_setschedparam.
409 -- Instead, use pthread_setscheduler
411 function pthread_mutexattr_setprotocol
412 (attr
: access pthread_mutexattr_t
;
413 protocol
: int
) return int
;
414 pragma Inline
(pthread_mutexattr_setprotocol
);
415 -- LynxOS doesn't have pthread_mutexattr_setprotocol
417 function pthread_mutexattr_setprioceiling
418 (attr
: access pthread_mutexattr_t
;
419 prioceiling
: int
) return int
;
420 pragma Inline
(pthread_mutexattr_setprioceiling
);
421 -- LynxOS doesn't have pthread_mutexattr_setprioceiling
423 function pthread_attr_setscope
424 (attr
: access pthread_attr_t
;
425 contentionscope
: int
) return int
;
426 -- LynxOS doesn't have pthread_attr_setscope: all threads have system scope
427 pragma Inline
(pthread_attr_setscope
);
429 function pthread_attr_setschedpolicy
430 (attr
: access pthread_attr_t
;
431 policy
: int
) return int
;
432 pragma Import
(C
, pthread_attr_setschedpolicy
, "pthread_attr_setsched");
434 function sched_yield
return int
;
435 -- pragma Import (C, sched_yield, "sched_yield");
436 pragma Inline
(sched_yield
);
438 ---------------------------
439 -- P1003.1c - Section 16 --
440 ---------------------------
442 function pthread_attr_init
(attributes
: access pthread_attr_t
) return int
;
443 pragma Import
(C
, pthread_attr_init
, "pthread_attr_create");
445 function pthread_attr_destroy
446 (attributes
: access pthread_attr_t
) return int
;
447 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_delete");
449 function pthread_attr_setdetachstate
450 (attr
: access pthread_attr_t
;
451 detachstate
: int
) return int
;
452 pragma Inline
(pthread_attr_setdetachstate
);
453 -- LynxOS doesn't have pthread_attr_setdetachstate
455 function pthread_attr_setstacksize
456 (attr
: access pthread_attr_t
;
457 stacksize
: size_t
) return int
;
458 pragma Import
(C
, pthread_attr_setstacksize
, "pthread_attr_setstacksize");
460 function pthread_create
461 (thread
: access pthread_t
;
462 attributes
: access pthread_attr_t
;
463 start_routine
: Thread_Body
;
464 arg
: System
.Address
) return int
;
465 pragma Inline
(pthread_create
);
466 -- LynxOS has a non standard pthread_create
468 function pthread_detach
(thread
: pthread_t
) return int
;
469 pragma Inline
(pthread_detach
);
471 procedure pthread_exit
(status
: System
.Address
);
472 pragma Import
(C
, pthread_exit
, "pthread_exit");
474 function pthread_self
return pthread_t
;
475 pragma Import
(C
, pthread_self
, "pthread_self");
477 --------------------------
478 -- POSIX.1c Section 17 --
479 --------------------------
481 function pthread_setspecific
482 (key
: pthread_key_t
;
483 value
: System
.Address
) return int
;
484 pragma Inline
(pthread_setspecific
);
485 -- LynxOS has a non standard pthread_setspecific
487 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
488 pragma Inline
(pthread_getspecific
);
489 -- LynxOS has a non standard pthread_getspecific
491 type destructor_pointer
is access procedure (arg
: System
.Address
);
492 pragma Convention
(C
, destructor_pointer
);
494 function pthread_key_create
495 (key
: access pthread_key_t
;
496 destructor
: destructor_pointer
) return int
;
497 pragma Inline
(pthread_key_create
);
498 -- LynxOS has a non standard pthread_keycreate
500 procedure pthread_init
;
501 -- This is a dummy procedure to share some GNULLI files
505 type sigbit_array
is array (1 .. 2) of long
;
506 type sigset_t
is record
507 sa_sigbits
: sigbit_array
;
509 pragma Convention
(C_Pass_By_Copy
, sigset_t
);
511 type pid_t
is new long
;
513 type time_t
is new long
;
515 type timespec
is record
519 pragma Convention
(C
, timespec
);
521 type clockid_t
is new unsigned_char
;
522 CLOCK_REALTIME
: constant clockid_t
:= 0;
531 pragma Convention
(C
, st_t
);
533 type pthread_attr_t
is record
535 pthread_attr_scope
: int
; -- ignored
537 pragma Convention
(C
, pthread_attr_t
);
539 type pthread_condattr_t
is new int
;
541 type pthread_mutexattr_t
is new int
;
543 type tid_t
is new short
;
544 type pthread_t
is new tid_t
;
546 type synch_ptr
is access all pthread_mutex_t
;
547 type pthread_mutex_t
is record
553 pragma Convention
(C
, pthread_mutex_t
);
555 type pthread_cond_t
is new pthread_mutex_t
;
557 type pthread_key_t
is new int
;
559 end System
.OS_Interface
;