1 ------------------------------------------------------------------------------
3 -- GNU ADA 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) 1997-2003 Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a AIX (Native THREADS) version of this package.
36 -- This package encapsulates all direct interfaces to OS services
37 -- that are needed by children of System.
39 -- PLEASE DO NOT add any with-clauses to this package
40 -- or remove the pragma Elaborate_Body.
41 -- It is designed to be a bottom-level (leaf) package.
44 package System.OS_Interface is
47 pragma Linker_Options ("-lpthreads");
48 pragma Linker_Options ("-lc_r");
50 subtype int is Interfaces.C.int;
51 subtype short is Interfaces.C.short;
52 subtype long is Interfaces.C.long;
53 subtype unsigned is Interfaces.C.unsigned;
54 subtype unsigned_short is Interfaces.C.unsigned_short;
55 subtype unsigned_long is Interfaces.C.unsigned_long;
56 subtype unsigned_char is Interfaces.C.unsigned_char;
57 subtype plain_char is Interfaces.C.plain_char;
58 subtype size_t is Interfaces.C.size_t;
64 function errno return int;
65 pragma Import (C, errno, "__get_errno");
67 EAGAIN : constant := 11;
68 EINTR : constant := 4;
69 EINVAL : constant := 22;
70 ENOMEM : constant := 12;
71 ETIMEDOUT : constant := 78;
77 Max_Interrupt : constant := 63;
78 type Signal is new int range 0 .. Max_Interrupt;
79 for Signal'Size use int'Size;
81 SIGHUP : constant := 1; -- hangup
82 SIGINT : constant := 2; -- interrupt (rubout)
83 SIGQUIT : constant := 3; -- quit (ASCD FS)
84 SIGILL : constant := 4; -- illegal instruction (not reset)
85 SIGTRAP : constant := 5; -- trace trap (not reset)
86 SIGIOT : constant := 6; -- IOT instruction
87 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
88 SIGEMT : constant := 7; -- EMT instruction
89 SIGFPE : constant := 8; -- floating point exception
90 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
91 SIGBUS : constant := 10; -- bus error
92 SIGSEGV : constant := 11; -- segmentation violation
93 SIGSYS : constant := 12; -- bad argument to system call
94 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
95 SIGALRM : constant := 14; -- alarm clock
96 SIGTERM : constant := 15; -- software termination signal from kill
97 SIGUSR1 : constant := 30; -- user defined signal 1
98 SIGUSR2 : constant := 31; -- user defined signal 2
99 SIGCLD : constant := 20; -- alias for SIGCHLD
100 SIGCHLD : constant := 20; -- child status change
101 SIGPWR : constant := 29; -- power-fail restart
102 SIGWINCH : constant := 28; -- window size change
103 SIGURG : constant := 16; -- urgent condition on IO channel
104 SIGPOLL : constant := 23; -- pollable event occurred
105 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
106 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
107 SIGTSTP : constant := 18; -- user stop requested from tty
108 SIGCONT : constant := 19; -- stopped process has been continued
109 SIGTTIN : constant := 21; -- background tty read attempted
110 SIGTTOU : constant := 22; -- background tty write attempted
111 SIGVTALRM : constant := 34; -- virtual timer expired
112 SIGPROF : constant := 32; -- profiling timer expired
113 SIGXCPU : constant := 24; -- CPU time limit exceeded
114 SIGXFSZ : constant := 25; -- filesize limit exceeded
115 SIGWAITING : constant := 39; -- m:n scheduling
117 -- the following signals are AIX specific
118 SIGMSG : constant := 27; -- input data is in the ring buffer
119 SIGDANGER : constant := 33; -- system crash imminent
120 SIGMIGRATE : constant := 35; -- migrate process
121 SIGPRE : constant := 36; -- programming exception
122 SIGVIRT : constant := 37; -- AIX virtual time alarm
123 SIGALRM1 : constant := 38; -- m:n condition variables
124 SIGKAP : constant := 60; -- keep alive poll from native keyboard
125 SIGGRANT : constant := SIGKAP; -- monitor mode granted
126 SIGRETRACT : constant := 61; -- monitor mode should be relinguished
127 SIGSOUND : constant := 62; -- sound control has completed
128 SIGSAK : constant := 63; -- secure attention key
130 SIGADAABORT : constant := SIGTERM;
131 -- Note: on other targets, we usually use SIGABRT, but on AiX, it
132 -- appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
134 type Signal_Set is array (Natural range <>) of Signal;
136 Unmasked : constant Signal_Set :=
137 (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
138 Reserved : constant Signal_Set := (SIGABRT, SIGKILL, SIGSTOP);
140 type sigset_t is private;
142 function sigaddset (set : access sigset_t; sig : Signal) return int;
143 pragma Import (C, sigaddset, "sigaddset");
145 function sigdelset (set : access sigset_t; sig : Signal) return int;
146 pragma Import (C, sigdelset, "sigdelset");
148 function sigfillset (set : access sigset_t) return int;
149 pragma Import (C, sigfillset, "sigfillset");
151 function sigismember (set : access sigset_t; sig : Signal) return int;
152 pragma Import (C, sigismember, "sigismember");
154 function sigemptyset (set : access sigset_t) return int;
155 pragma Import (C, sigemptyset, "sigemptyset");
157 type struct_sigaction is record
158 sa_handler : System.Address;
162 pragma Convention (C, struct_sigaction);
163 type struct_sigaction_ptr is access all struct_sigaction;
165 SA_SIGINFO : constant := 16#0100#;
167 SIG_BLOCK : constant := 0;
168 SIG_UNBLOCK : constant := 1;
169 SIG_SETMASK : constant := 2;
171 SIG_DFL : constant := 0;
172 SIG_IGN : constant := 1;
176 act : struct_sigaction_ptr;
177 oact : struct_sigaction_ptr) return int;
178 pragma Import (C, sigaction, "sigaction");
184 Time_Slice_Supported : constant Boolean := False;
185 -- Indicates wether time slicing is supported
187 type timespec is private;
189 type clockid_t is private;
191 CLOCK_REALTIME : constant clockid_t;
193 function clock_gettime
194 (clock_id : clockid_t;
195 tp : access timespec) return int;
196 -- AiX threads don't have clock_gettime
197 -- We instead use gettimeofday()
199 function To_Duration (TS : timespec) return Duration;
200 pragma Inline (To_Duration);
202 function To_Timespec (D : Duration) return timespec;
203 pragma Inline (To_Timespec);
205 type struct_timezone is record
206 tz_minuteswest : int;
209 pragma Convention (C, struct_timezone);
210 type struct_timezone_ptr is access all struct_timezone;
212 type struct_timeval is private;
213 -- This is needed on systems that do not have clock_gettime()
214 -- but do have gettimeofday().
216 function To_Duration (TV : struct_timeval) return Duration;
217 pragma Inline (To_Duration);
219 function To_Timeval (D : Duration) return struct_timeval;
220 pragma Inline (To_Timeval);
222 -------------------------
223 -- Priority Scheduling --
224 -------------------------
226 SCHED_FIFO : constant := 1;
227 SCHED_RR : constant := 2;
228 SCHED_OTHER : constant := 0;
234 type pid_t is private;
236 function kill (pid : pid_t; sig : Signal) return int;
237 pragma Import (C, kill, "kill");
239 function getpid return pid_t;
240 pragma Import (C, getpid, "getpid");
246 function lwp_self return System.Address;
247 pragma Import (C, lwp_self, "thread_self");
253 type Thread_Body is access
254 function (arg : System.Address) return System.Address;
255 type pthread_t is private;
256 subtype Thread_Id is pthread_t;
258 type pthread_mutex_t is limited private;
259 type pthread_cond_t is limited private;
260 type pthread_attr_t is limited private;
261 type pthread_mutexattr_t is limited private;
262 type pthread_condattr_t is limited private;
263 type pthread_key_t is private;
265 PTHREAD_CREATE_DETACHED : constant := 1;
271 Stack_Base_Available : constant Boolean := False;
272 -- Indicates wether the stack base is available on this target.
274 function Get_Stack_Base (thread : pthread_t) return Address;
275 pragma Inline (Get_Stack_Base);
276 -- returns the stack base of the specified thread.
277 -- Only call this function when Stack_Base_Available is True.
279 function Get_Page_Size return size_t;
280 function Get_Page_Size return Address;
281 pragma Import (C, Get_Page_Size, "getpagesize");
282 -- returns the size of a page, or 0 if this is not relevant on this
285 PROT_NONE : constant := 0;
286 PROT_READ : constant := 1;
287 PROT_WRITE : constant := 2;
288 PROT_EXEC : constant := 4;
289 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
291 PROT_ON : constant := PROT_READ;
292 PROT_OFF : constant := PROT_ALL;
294 function mprotect (addr : Address; len : size_t; prot : int) return int;
295 pragma Import (C, mprotect);
297 ---------------------------------------
298 -- Nonstandard Thread Initialization --
299 ---------------------------------------
301 -- Though not documented, pthread_init *must* be called before any other
304 procedure pthread_init;
305 pragma Import (C, pthread_init, "pthread_init");
307 -------------------------
308 -- POSIX.1c Section 3 --
309 -------------------------
312 (set : access sigset_t;
313 sig : access Signal) return int;
314 pragma Import (C, sigwait, "sigwait");
316 function pthread_kill
318 sig : Signal) return int;
319 pragma Import (C, pthread_kill, "pthread_kill");
321 type sigset_t_ptr is access all sigset_t;
323 function pthread_sigmask
326 oset : sigset_t_ptr) return int;
327 pragma Import (C, pthread_sigmask, "sigthreadmask");
329 --------------------------
330 -- POSIX.1c Section 11 --
331 --------------------------
333 function pthread_mutexattr_init
334 (attr : access pthread_mutexattr_t) return int;
335 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
337 function pthread_mutexattr_destroy
338 (attr : access pthread_mutexattr_t) return int;
339 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
341 function pthread_mutex_init
342 (mutex : access pthread_mutex_t;
343 attr : access pthread_mutexattr_t) return int;
344 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
346 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
347 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
349 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
350 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
352 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
353 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
355 function pthread_condattr_init
356 (attr : access pthread_condattr_t) return int;
357 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
359 function pthread_condattr_destroy
360 (attr : access pthread_condattr_t) return int;
361 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
363 function pthread_cond_init
364 (cond : access pthread_cond_t;
365 attr : access pthread_condattr_t) return int;
366 pragma Import (C, pthread_cond_init, "pthread_cond_init");
368 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
369 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
371 function pthread_cond_signal (cond : access pthread_cond_t) return int;
372 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
374 function pthread_cond_wait
375 (cond : access pthread_cond_t;
376 mutex : access pthread_mutex_t) return int;
377 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
379 function pthread_cond_timedwait
380 (cond : access pthread_cond_t;
381 mutex : access pthread_mutex_t;
382 abstime : access timespec) return int;
383 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
385 Relative_Timed_Wait : constant Boolean := False;
386 -- pthread_cond_timedwait requires an absolute delay time
388 ----------------------------
389 -- POSIX.1c Section 13 --
390 ----------------------------
392 PTHREAD_PRIO_NONE : constant := 0;
393 PTHREAD_PRIO_PROTECT : constant := 0;
394 PTHREAD_PRIO_INHERIT : constant := 0;
396 function pthread_mutexattr_setprotocol
397 (attr : access pthread_mutexattr_t;
398 protocol : int) return int;
399 pragma Import (C, pthread_mutexattr_setprotocol);
401 function pthread_mutexattr_setprioceiling
402 (attr : access pthread_mutexattr_t;
403 prioceiling : int) return int;
404 pragma Import (C, pthread_mutexattr_setprioceiling);
406 type Array_5_Int is array (0 .. 5) of int;
407 type struct_sched_param is record
408 sched_priority : int;
410 sched_reserved : Array_5_Int;
413 function pthread_setschedparam
416 param : access struct_sched_param) return int;
417 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
419 function pthread_attr_setscope
420 (attr : access pthread_attr_t;
421 contentionscope : int) return int;
422 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
424 function pthread_attr_setinheritsched
425 (attr : access pthread_attr_t;
426 inheritsched : int) return int;
427 pragma Import (C, pthread_attr_setinheritsched);
429 function pthread_attr_setschedpolicy
430 (attr : access pthread_attr_t;
431 policy : int) return int;
432 pragma Import (C, pthread_attr_setschedpolicy);
434 function pthread_attr_setschedparam
435 (attr : access pthread_attr_t;
436 sched_param : int) return int;
437 pragma Import (C, pthread_attr_setschedparam);
439 function sched_yield return int;
440 -- AiX have a nonstandard sched_yield.
442 ---------------------------
443 -- P1003.1c - Section 16 --
444 ---------------------------
446 function pthread_attr_init (attributes : access pthread_attr_t) return int;
447 pragma Import (C, pthread_attr_init, "pthread_attr_init");
449 function pthread_attr_destroy
450 (attributes : access pthread_attr_t) return int;
451 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
453 function pthread_attr_setdetachstate
454 (attr : access pthread_attr_t;
455 detachstate : int) return int;
456 pragma Import (C, pthread_attr_setdetachstate);
458 function pthread_attr_setstacksize
459 (attr : access pthread_attr_t;
460 stacksize : size_t) return int;
461 pragma Import (C, pthread_attr_setstacksize);
463 function pthread_create
464 (thread : access pthread_t;
465 attributes : access pthread_attr_t;
466 start_routine : Thread_Body;
467 arg : System.Address)
469 pragma Import (C, pthread_create, "pthread_create");
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 Import (C, pthread_setspecific, "pthread_setspecific");
486 function pthread_getspecific (key : pthread_key_t) return System.Address;
487 pragma Import (C, pthread_getspecific, "pthread_getspecific");
489 type destructor_pointer is access
490 procedure (arg : System.Address);
492 function pthread_key_create
493 (key : access pthread_key_t;
494 destructor : destructor_pointer) return int;
495 pragma Import (C, pthread_key_create, "pthread_key_create");
499 type sigset_t is record
500 losigs : unsigned_long;
501 hisigs : unsigned_long;
503 pragma Convention (C_Pass_By_Copy, sigset_t);
505 type pid_t is new int;
507 type time_t is new long;
509 type timespec is record
513 pragma Convention (C, timespec);
515 type clockid_t is new int;
516 CLOCK_REALTIME : constant clockid_t := 0;
518 type struct_timeval is record
522 pragma Convention (C, struct_timeval);
524 type pthread_attr_t is new System.Address;
525 pragma Convention (C, pthread_attr_t);
526 -- typedef struct __pt_attr *pthread_attr_t;
528 type pthread_condattr_t is new System.Address;
529 pragma Convention (C, pthread_condattr_t);
530 -- typedef struct __pt_attr *pthread_condattr_t;
532 type pthread_mutexattr_t is new System.Address;
533 pragma Convention (C, pthread_mutexattr_t);
534 -- typedef struct __pt_attr *pthread_mutexattr_t;
536 type pthread_t is new System.Address;
537 pragma Convention (C, pthread_t);
538 -- typedef void *pthread_t;
541 type ptq_queue_ptr is access all ptq_queue;
543 type ptq_queue is record
544 ptq_next : ptq_queue_ptr;
545 ptq_prev : ptq_queue_ptr;
548 type Array_3_Int is array (0 .. 3) of int;
549 type pthread_mutex_t is record
555 ptmtx_owner : pthread_t;
557 attr : pthread_attr_t;
560 reserved : Array_3_Int;
562 pragma Convention (C, pthread_mutex_t);
563 type pthread_mutex_t_ptr is access pthread_mutex_t;
565 type pthread_cond_t is record
569 ptcv_waiters : ptq_queue;
571 attr : pthread_attr_t;
572 mutex : pthread_mutex_t_ptr;
576 pragma Convention (C, pthread_cond_t);
578 type pthread_key_t is new unsigned;
580 end System.OS_Interface;