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) 1995-2011, Free Software Foundation, Inc. --
12 -- GNAT 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 3, or (at your option) any later ver- --
15 -- sion. GNAT 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. --
19 -- As a special exception under Section 7 of GPL version 3, you are granted --
20 -- additional permissions described in the GCC Runtime Library Exception, --
21 -- version 3.1, as published by the Free Software Foundation. --
23 -- You should have received a copy of the GNU General Public License and --
24 -- a copy of the GCC Runtime Library Exception along with this program; --
25 -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
26 -- <http://www.gnu.org/licenses/>. --
28 -- GNARL was developed by the GNARL team at Florida State University. --
29 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
31 ------------------------------------------------------------------------------
33 -- This is a LynxOS (POSIX Threads) version of this package
35 -- This package encapsulates all direct interfaces to OS services
36 -- that are needed by the tasking run-time (libgnarl).
38 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
39 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
41 with Ada
.Unchecked_Conversion
;
45 package System
.OS_Interface
is
48 pragma Linker_Options
("-mthreads");
49 -- Selects the POSIX 1.c runtime, rather than the non-threading runtime
50 -- or the deprecated legacy threads library. The -mthreads flag is
51 -- defined in patch.LynxOS and matches the definition for Lynx's gcc.
53 subtype int
is Interfaces
.C
.int
;
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;
82 -- Max_Interrupt is the number of OS signals, as defined in:
84 -- /usr/include/sys/signal.h
87 -- The lowest numbered signal is 1, but 0 is a valid argument to some
88 -- library functions, e.g. kill(2). However, 0 is not just another
89 -- signal: For instance 'I in Signal' and similar should be used with
92 type Signal
is new int
range 0 .. Max_Interrupt
;
93 for Signal
'Size use int
'Size;
95 SIGHUP
: constant := 1; -- hangup
96 SIGINT
: constant := 2; -- interrupt (rubout)
97 SIGQUIT
: constant := 3; -- quit (ASCD FS)
98 SIGILL
: constant := 4; -- illegal instruction (not reset)
99 SIGTRAP
: constant := 5; -- trace trap (not reset)
100 SIGBRK
: constant := 6; -- break
101 SIGIOT
: constant := 6; -- IOT instruction
102 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in future
103 SIGCORE
: constant := 7; -- kill with core dump
104 SIGEMT
: constant := 7; -- EMT instruction
105 SIGFPE
: constant := 8; -- floating point exception
106 SIGKILL
: constant := 9; -- kill (cannot be caught or ignored)
107 SIGBUS
: constant := 10; -- bus error
108 SIGSEGV
: constant := 11; -- segmentation violation
109 SIGSYS
: constant := 12; -- bad argument to system call
110 SIGPIPE
: constant := 13; -- write on a pipe with no one to read it
111 SIGALRM
: constant := 14; -- alarm clock
112 SIGTERM
: constant := 15; -- software termination signal from kill
113 SIGURG
: constant := 16; -- urgent condition on IO channel
114 SIGSTOP
: constant := 17; -- stop (cannot be caught or ignored)
115 SIGTSTP
: constant := 18; -- user stop requested from tty
116 SIGCONT
: constant := 19; -- stopped process has been continued
117 SIGCLD
: constant := 20; -- alias for SIGCHLD
118 SIGCHLD
: constant := 20; -- child status change
119 SIGTTIN
: constant := 21; -- background tty read attempted
120 SIGTTOU
: constant := 22; -- background tty write attempted
121 SIGIO
: constant := 23; -- I/O possible (Solaris SIGPOLL alias)
122 SIGPOLL
: constant := 23; -- pollable event occurred
123 SIGTHREADKILL
: constant := 24; -- Reserved by LynxOS runtime
124 SIGXCPU
: constant := 24; -- CPU time limit exceeded
125 SIGXFSZ
: constant := 25; -- filesize limit exceeded
126 SIGVTALRM
: constant := 26; -- virtual timer expired
127 SIGPROF
: constant := 27; -- profiling timer expired
128 SIGWINCH
: constant := 28; -- window size change
129 SIGLOST
: constant := 29; -- SUN 4.1 compatibility
130 SIGUSR1
: constant := 30; -- user defined signal 1
131 SIGUSR2
: constant := 31; -- user defined signal 2
133 SIGPRIO
: constant := 32;
134 -- sent to a process with its priority or group is changed
136 SIGADAABORT
: constant := SIGABRT
;
137 -- Change this if you want to use another signal for task abort.
138 -- SIGTERM might be a good one.
140 type Signal_Set
is array (Natural range <>) of Signal
;
142 Unmasked
: constant Signal_Set
:=
143 (SIGTRAP
, SIGTTIN
, SIGTTOU
, SIGTSTP
, SIGPROF
, SIGTHREADKILL
);
144 Reserved
: constant Signal_Set
:= (SIGABRT
, SIGKILL
, SIGSTOP
, SIGPRIO
);
146 type sigset_t
is private;
148 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
149 pragma Import
(C
, sigaddset
, "sigaddset");
151 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
152 pragma Import
(C
, sigdelset
, "sigdelset");
154 function sigfillset
(set
: access sigset_t
) return int
;
155 pragma Import
(C
, sigfillset
, "sigfillset");
157 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
158 pragma Import
(C
, sigismember
, "sigismember");
160 function sigemptyset
(set
: access sigset_t
) return int
;
161 pragma Import
(C
, sigemptyset
, "sigemptyset");
163 type struct_sigaction
is record
164 sa_handler
: System
.Address
;
168 pragma Convention
(C
, struct_sigaction
);
169 type struct_sigaction_ptr
is access all struct_sigaction
;
171 SA_SIGINFO
: constant := 16#
80#
;
173 SA_ONSTACK
: constant := 16#
00#
;
174 -- SA_ONSTACK is not defined on LynxOS, but it is referred to in the POSIX
175 -- implementation of System.Interrupt_Management. Therefore we define a
176 -- dummy value of zero here so that setting this flag is a nop.
178 SIG_BLOCK
: constant := 0;
179 SIG_UNBLOCK
: constant := 1;
180 SIG_SETMASK
: constant := 2;
182 SIG_DFL
: constant := 0;
183 SIG_IGN
: constant := 1;
187 act
: struct_sigaction_ptr
;
188 oact
: struct_sigaction_ptr
) return int
;
189 pragma Import
(C
, sigaction
, "sigaction");
195 Time_Slice_Supported
: constant Boolean := True;
196 -- Indicates whether time slicing is supported
198 type timespec
is private;
200 type clockid_t
is private;
202 CLOCK_REALTIME
: constant clockid_t
;
203 CLOCK_MONOTONIC
: constant clockid_t
;
205 function clock_gettime
206 (clock_id
: clockid_t
;
207 tp
: access timespec
) return int
;
208 pragma Import
(C
, clock_gettime
, "clock_gettime");
210 function clock_getres
211 (clock_id
: clockid_t
;
212 res
: access timespec
) return int
;
213 pragma Import
(C
, clock_getres
, "clock_getres");
215 function To_Duration
(TS
: timespec
) return Duration;
216 pragma Inline
(To_Duration
);
218 function To_Timespec
(D
: Duration) return timespec
;
219 pragma Inline
(To_Timespec
);
221 type struct_timezone
is record
222 tz_minuteswest
: int
;
225 pragma Convention
(C
, struct_timezone
);
226 type struct_timezone_ptr
is access all struct_timezone
;
228 -------------------------
229 -- Priority Scheduling --
230 -------------------------
232 SCHED_FIFO
: constant := 16#
200000#
;
233 SCHED_RR
: constant := 16#
100000#
;
234 SCHED_OTHER
: constant := 16#
400000#
;
240 type pid_t
is private;
242 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
243 pragma Import
(C
, kill
, "kill");
245 function getpid
return pid_t
;
246 pragma Import
(C
, getpid
, "getpid");
252 function lwp_self
return System
.Address
;
253 pragma Import
(C
, lwp_self
, "pthread_self");
259 type Thread_Body
is access
260 function (arg
: System
.Address
) return System
.Address
;
261 pragma Convention
(C
, Thread_Body
);
263 function Thread_Body_Access
is new
264 Ada
.Unchecked_Conversion
(System
.Address
, Thread_Body
);
266 type pthread_t
is private;
267 subtype Thread_Id
is pthread_t
;
269 type pthread_mutex_t
is limited private;
270 type pthread_cond_t
is limited private;
271 type pthread_attr_t
is limited private;
272 type pthread_mutexattr_t
is limited private;
273 type pthread_condattr_t
is limited private;
274 type pthread_key_t
is private;
276 PTHREAD_CREATE_DETACHED
: constant := 1;
277 PTHREAD_CREATE_JOINABLE
: constant := 0;
283 Alternate_Stack_Size
: constant := 0;
284 -- No alternate signal stack is used on this platform
286 Stack_Base_Available
: constant Boolean := False;
287 -- Indicates whether the stack base is available on this target
289 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
290 pragma Inline
(Get_Stack_Base
);
291 -- Returns the stack base of the specified thread.
292 -- Only call this function when Stack_Base_Available is True.
294 function Get_Page_Size
return size_t
;
295 function Get_Page_Size
return Address
;
296 pragma Import
(C
, Get_Page_Size
, "getpagesize");
297 -- Returns the size of a page, or 0 if this is not relevant on this
300 PROT_NONE
: constant := 1;
301 PROT_READ
: constant := 2;
302 PROT_WRITE
: constant := 4;
303 PROT_EXEC
: constant := 8;
304 PROT_ALL
: constant := PROT_READ
+ PROT_WRITE
+ PROT_EXEC
;
306 PROT_ON
: constant := PROT_READ
;
307 PROT_OFF
: constant := PROT_ALL
;
309 function mprotect
(addr
: Address
; len
: size_t
; prot
: int
) return int
;
310 pragma Import
(C
, mprotect
);
312 ---------------------------------------
313 -- Nonstandard Thread Initialization --
314 ---------------------------------------
316 procedure pthread_init
;
317 -- This is a dummy procedure to share some GNULLI files
319 -------------------------
320 -- POSIX.1c Section 3 --
321 -------------------------
324 (set
: access sigset_t
;
325 sig
: access Signal
) return int
;
326 pragma Inline
(sigwait
);
327 -- LynxOS has non standard sigwait
329 function pthread_kill
331 sig
: Signal
) return int
;
332 pragma Import
(C
, pthread_kill
, "pthread_kill");
334 function pthread_sigmask
336 set
: access sigset_t
;
337 oset
: access sigset_t
) return int
;
338 pragma Import
(C
, pthread_sigmask
, "pthread_sigmask");
339 -- The behavior of pthread_sigmask on LynxOS requires
340 -- further investigation.
342 ----------------------------
343 -- POSIX.1c Section 11 --
344 ----------------------------
346 function pthread_mutexattr_init
347 (attr
: access pthread_mutexattr_t
) return int
;
348 pragma Import
(C
, pthread_mutexattr_init
, "pthread_mutexattr_init");
350 function pthread_mutexattr_destroy
351 (attr
: access pthread_mutexattr_t
) return int
;
352 pragma Import
(C
, pthread_mutexattr_destroy
, "pthread_mutexattr_destroy");
354 function pthread_mutex_init
355 (mutex
: access pthread_mutex_t
;
356 attr
: access pthread_mutexattr_t
) return int
;
357 pragma Import
(C
, pthread_mutex_init
, "pthread_mutex_init");
359 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
360 pragma Import
(C
, pthread_mutex_destroy
, "pthread_mutex_destroy");
362 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
363 pragma Import
(C
, pthread_mutex_lock
, "pthread_mutex_lock");
365 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
366 pragma Import
(C
, pthread_mutex_unlock
, "pthread_mutex_unlock");
368 function pthread_condattr_init
369 (attr
: access pthread_condattr_t
) return int
;
370 pragma Import
(C
, pthread_condattr_init
, "pthread_condattr_init");
372 function pthread_condattr_destroy
373 (attr
: access pthread_condattr_t
) return int
;
374 pragma Import
(C
, pthread_condattr_destroy
, "pthread_condattr_destroy");
376 function pthread_cond_init
377 (cond
: access pthread_cond_t
;
378 attr
: access pthread_condattr_t
) return int
;
379 pragma Import
(C
, pthread_cond_init
, "pthread_cond_init");
381 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
382 pragma Import
(C
, pthread_cond_destroy
, "pthread_cond_destroy");
384 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
385 pragma Import
(C
, pthread_cond_signal
, "pthread_cond_signal");
387 function pthread_cond_wait
388 (cond
: access pthread_cond_t
;
389 mutex
: access pthread_mutex_t
) return int
;
390 pragma Import
(C
, pthread_cond_wait
, "pthread_cond_wait");
392 function pthread_cond_timedwait
393 (cond
: access pthread_cond_t
;
394 mutex
: access pthread_mutex_t
;
395 abstime
: access timespec
) return int
;
396 pragma Import
(C
, pthread_cond_timedwait
, "pthread_cond_timedwait");
398 Relative_Timed_Wait
: constant Boolean := False;
399 -- pthread_cond_timedwait requires an absolute delay time
401 --------------------------
402 -- POSIX.1c Section 13 --
403 --------------------------
405 PTHREAD_PRIO_NONE
: constant := 0;
406 PTHREAD_PRIO_INHERIT
: constant := 1;
407 PTHREAD_PRIO_PROTECT
: constant := 2;
409 function pthread_mutexattr_setprotocol
410 (attr
: access pthread_mutexattr_t
;
411 protocol
: int
) return int
;
412 pragma Import
(C
, pthread_mutexattr_setprotocol
);
414 function pthread_mutexattr_setprioceiling
415 (attr
: access pthread_mutexattr_t
;
416 prioceiling
: int
) return int
;
417 pragma Import
(C
, pthread_mutexattr_setprioceiling
);
419 type struct_sched_param
is record
420 sched_priority
: int
;
423 function pthread_setschedparam
426 param
: access struct_sched_param
) return int
;
427 pragma Import
(C
, pthread_setschedparam
, "pthread_setschedparam");
429 function pthread_attr_setscope
430 (attr
: access pthread_attr_t
;
431 contentionscope
: int
) return int
;
432 pragma Import
(C
, pthread_attr_setscope
, "pthread_attr_setscope");
434 function pthread_attr_setinheritsched
435 (attr
: access pthread_attr_t
;
436 inheritsched
: int
) return int
;
437 pragma Import
(C
, pthread_attr_setinheritsched
);
439 function pthread_attr_setschedpolicy
440 (attr
: access pthread_attr_t
;
441 policy
: int
) return int
;
442 pragma Import
(C
, pthread_attr_setschedpolicy
);
444 function sched_yield
return int
;
445 pragma Import
(C
, sched_yield
, "sched_yield");
447 --------------------------
448 -- P1003.1c Section 16 --
449 --------------------------
451 function pthread_attr_init
(attributes
: access pthread_attr_t
) return int
;
452 pragma Import
(C
, pthread_attr_init
, "pthread_attr_init");
454 function pthread_attr_destroy
455 (attributes
: access pthread_attr_t
) return int
;
456 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_destroy");
458 function pthread_attr_setdetachstate
459 (attr
: access pthread_attr_t
;
460 detachstate
: int
) return int
;
461 pragma Import
(C
, pthread_attr_setdetachstate
);
463 function pthread_attr_setstacksize
464 (attr
: access pthread_attr_t
;
465 stacksize
: size_t
) return int
;
466 pragma Import
(C
, pthread_attr_setstacksize
);
468 function pthread_create
469 (thread
: access pthread_t
;
470 attributes
: access pthread_attr_t
;
471 start_routine
: Thread_Body
;
472 arg
: System
.Address
) return int
;
473 pragma Import
(C
, pthread_create
, "pthread_create");
475 procedure pthread_exit
(status
: System
.Address
);
476 pragma Import
(C
, pthread_exit
, "pthread_exit");
478 function pthread_self
return pthread_t
;
479 pragma Import
(C
, pthread_self
, "pthread_self");
481 --------------------------
482 -- POSIX.1c Section 17 --
483 --------------------------
485 function st_setspecific
486 (key
: pthread_key_t
;
487 value
: System
.Address
) return int
;
488 pragma Import
(C
, st_setspecific
, "st_setspecific");
490 function st_getspecific
491 (key
: pthread_key_t
;
492 retval
: System
.Address
) return int
;
493 pragma Import
(C
, st_getspecific
, "st_getspecific");
495 type destructor_pointer
is access procedure (arg
: System
.Address
);
496 pragma Convention
(C
, destructor_pointer
);
498 function st_keycreate
499 (destructor
: destructor_pointer
;
500 key
: access pthread_key_t
) return int
;
501 pragma Import
(C
, st_keycreate
, "st_keycreate");
505 type sigset_t
is record
508 pragma Convention
(C
, sigset_t
);
510 type pid_t
is new long
;
512 type time_t
is new long
;
514 type timespec
is record
518 pragma Convention
(C
, timespec
);
520 type clockid_t
is new unsigned_char
;
521 CLOCK_REALTIME
: constant clockid_t
:= 1;
522 CLOCK_MONOTONIC
: constant clockid_t
:= CLOCK_REALTIME
;
524 type st_attr_t
is record
533 pragma Convention
(C
, st_attr_t
);
535 type pthread_attr_t
is record
536 pthread_attr_magic
: unsigned
;
538 pthread_attr_scope
: int
;
540 pragma Convention
(C
, pthread_attr_t
);
542 type pthread_condattr_t
is record
544 cv_pshared
: unsigned
;
546 pragma Convention
(C
, pthread_condattr_t
);
548 type pthread_mutexattr_t
is record
553 pragma Convention
(C
, pthread_mutexattr_t
);
555 type tid_t
is new short
;
556 type pthread_t
is new tid_t
;
558 type block_obj_t
is new System
.Address
;
559 -- typedef struct _block_obj_s {
560 -- struct st_entry *b_head;
563 type pthread_mutex_t
is record
566 m_wait
: block_obj_t
;
572 pragma Convention
(C
, pthread_mutex_t
);
573 type pthread_mutex_t_ptr
is access all pthread_mutex_t
;
575 type pthread_cond_t
is record
577 cv_wait
: block_obj_t
;
578 cv_mutex
: pthread_mutex_t_ptr
;
581 pragma Convention
(C
, pthread_cond_t
);
583 type pthread_key_t
is new int
;
585 end System
.OS_Interface
;