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 AIX (Native THREADS) version of this package
37 -- This package encapsulates all direct interfaces to OS services that are
38 -- 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 ("-pthread");
50 -- This implies -lpthreads + other things depending on the GCC
51 -- configuration, such as the selection of a proper libgcc variant
52 -- for table-based exception handling when it is available.
54 pragma Linker_Options ("-lc_r");
56 subtype int is Interfaces.C.int;
57 subtype short is Interfaces.C.short;
58 subtype long is Interfaces.C.long;
59 subtype unsigned is Interfaces.C.unsigned;
60 subtype unsigned_short is Interfaces.C.unsigned_short;
61 subtype unsigned_long is Interfaces.C.unsigned_long;
62 subtype unsigned_char is Interfaces.C.unsigned_char;
63 subtype plain_char is Interfaces.C.plain_char;
64 subtype size_t is Interfaces.C.size_t;
70 function errno return int;
71 pragma Import (C, errno, "__get_errno");
73 EAGAIN : constant := 11;
74 EINTR : constant := 4;
75 EINVAL : constant := 22;
76 ENOMEM : constant := 12;
77 ETIMEDOUT : constant := 78;
83 Max_Interrupt : constant := 63;
84 type Signal is new int range 0 .. Max_Interrupt;
85 for Signal'Size use int'Size;
87 SIGHUP : constant := 1; -- hangup
88 SIGINT : constant := 2; -- interrupt (rubout)
89 SIGQUIT : constant := 3; -- quit (ASCD FS)
90 SIGILL : constant := 4; -- illegal instruction (not reset)
91 SIGTRAP : constant := 5; -- trace trap (not reset)
92 SIGIOT : constant := 6; -- IOT instruction
93 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
94 SIGEMT : constant := 7; -- EMT instruction
95 SIGFPE : constant := 8; -- floating point exception
96 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
97 SIGBUS : constant := 10; -- bus error
98 SIGSEGV : constant := 11; -- segmentation violation
99 SIGSYS : constant := 12; -- bad argument to system call
100 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
101 SIGALRM : constant := 14; -- alarm clock
102 SIGTERM : constant := 15; -- software termination signal from kill
103 SIGUSR1 : constant := 30; -- user defined signal 1
104 SIGUSR2 : constant := 31; -- user defined signal 2
105 SIGCLD : constant := 20; -- alias for SIGCHLD
106 SIGCHLD : constant := 20; -- child status change
107 SIGPWR : constant := 29; -- power-fail restart
108 SIGWINCH : constant := 28; -- window size change
109 SIGURG : constant := 16; -- urgent condition on IO channel
110 SIGPOLL : constant := 23; -- pollable event occurred
111 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
112 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
113 SIGTSTP : constant := 18; -- user stop requested from tty
114 SIGCONT : constant := 19; -- stopped process has been continued
115 SIGTTIN : constant := 21; -- background tty read attempted
116 SIGTTOU : constant := 22; -- background tty write attempted
117 SIGVTALRM : constant := 34; -- virtual timer expired
118 SIGPROF : constant := 32; -- profiling timer expired
119 SIGXCPU : constant := 24; -- CPU time limit exceeded
120 SIGXFSZ : constant := 25; -- filesize limit exceeded
121 SIGWAITING : constant := 39; -- m:n scheduling
123 -- The following signals are AIX specific
125 SIGMSG : constant := 27; -- input data is in the ring buffer
126 SIGDANGER : constant := 33; -- system crash imminent
127 SIGMIGRATE : constant := 35; -- migrate process
128 SIGPRE : constant := 36; -- programming exception
129 SIGVIRT : constant := 37; -- AIX virtual time alarm
130 SIGALRM1 : constant := 38; -- m:n condition variables
131 SIGCPUFAIL : constant := 59; -- Predictive De-configuration of Processors
132 SIGKAP : constant := 60; -- keep alive poll from native keyboard
133 SIGGRANT : constant := SIGKAP; -- monitor mode granted
134 SIGRETRACT : constant := 61; -- monitor mode should be relinguished
135 SIGSOUND : constant := 62; -- sound control has completed
136 SIGSAK : constant := 63; -- secure attention key
138 SIGADAABORT : constant := SIGEMT;
139 -- Note: on other targets, we usually use SIGABRT, but on AIX, it appears
140 -- that SIGABRT can't be used in sigwait(), so we use SIGEMT.
141 -- SIGEMT is "Emulator Trap Instruction" from the PDP-11, and does not
142 -- have a standardized usage.
144 type Signal_Set is array (Natural range <>) of Signal;
146 Unmasked : constant Signal_Set :=
147 (SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF);
148 Reserved : constant Signal_Set :=
149 (SIGABRT, SIGKILL, SIGSTOP, SIGALRM1, SIGWAITING, SIGCPUFAIL);
151 type sigset_t is private;
153 function sigaddset (set : access sigset_t; sig : Signal) return int;
154 pragma Import (C, sigaddset, "sigaddset");
156 function sigdelset (set : access sigset_t; sig : Signal) return int;
157 pragma Import (C, sigdelset, "sigdelset");
159 function sigfillset (set : access sigset_t) return int;
160 pragma Import (C, sigfillset, "sigfillset");
162 function sigismember (set : access sigset_t; sig : Signal) return int;
163 pragma Import (C, sigismember, "sigismember");
165 function sigemptyset (set : access sigset_t) return int;
166 pragma Import (C, sigemptyset, "sigemptyset");
168 type struct_sigaction is record
169 sa_handler : System.Address;
173 pragma Convention (C, struct_sigaction);
174 type struct_sigaction_ptr is access all struct_sigaction;
176 SA_SIGINFO : constant := 16#0100#;
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;
204 function clock_gettime
205 (clock_id : clockid_t;
206 tp : access timespec) return int;
207 -- AIX threads don't have clock_gettime, so use gettimeofday() instead
209 function To_Duration (TS : timespec) return Duration;
210 pragma Inline (To_Duration);
212 function To_Timespec (D : Duration) return timespec;
213 pragma Inline (To_Timespec);
215 type struct_timezone is record
216 tz_minuteswest : int;
219 pragma Convention (C, struct_timezone);
220 type struct_timezone_ptr is access all struct_timezone;
222 type struct_timeval is private;
223 -- This is needed on systems that do not have clock_gettime() but do have
226 function To_Duration (TV : struct_timeval) return Duration;
227 pragma Inline (To_Duration);
229 function To_Timeval (D : Duration) return struct_timeval;
230 pragma Inline (To_Timeval);
232 -------------------------
233 -- Priority Scheduling --
234 -------------------------
236 SCHED_FIFO : constant := 1;
237 SCHED_RR : constant := 2;
238 SCHED_OTHER : constant := 0;
240 function To_Target_Priority
241 (Prio : System.Any_Priority) return Interfaces.C.int;
242 -- Maps System.Any_Priority to a POSIX priority
248 type pid_t is private;
250 function kill (pid : pid_t; sig : Signal) return int;
251 pragma Import (C, kill, "kill");
253 function getpid return pid_t;
254 pragma Import (C, getpid, "getpid");
260 function lwp_self return System.Address;
261 pragma Import (C, lwp_self, "thread_self");
267 type Thread_Body is access
268 function (arg : System.Address) return System.Address;
270 function Thread_Body_Access is new
271 Ada.Unchecked_Conversion (System.Address, Thread_Body);
273 type pthread_t is private;
274 subtype Thread_Id is pthread_t;
276 type pthread_mutex_t is limited private;
277 type pthread_cond_t is limited private;
278 type pthread_attr_t is limited private;
279 type pthread_mutexattr_t is limited private;
280 type pthread_condattr_t is limited private;
281 type pthread_key_t is private;
283 PTHREAD_CREATE_DETACHED : constant := 1;
285 PTHREAD_SCOPE_PROCESS : constant := 1;
286 PTHREAD_SCOPE_SYSTEM : constant := 0;
292 Stack_Base_Available : constant Boolean := False;
293 -- Indicates wether the stack base is available on this target
295 function Get_Stack_Base (thread : pthread_t) return Address;
296 pragma Inline (Get_Stack_Base);
297 -- Returns the stack base of the specified thread. Only call this function
298 -- when Stack_Base_Available is True.
300 function Get_Page_Size return size_t;
301 function Get_Page_Size return Address;
302 pragma Import (C, Get_Page_Size, "getpagesize");
303 -- Returns the size of a page, or 0 if this is not relevant on this target
305 PROT_NONE : constant := 0;
306 PROT_READ : constant := 1;
307 PROT_WRITE : constant := 2;
308 PROT_EXEC : constant := 4;
309 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
311 PROT_ON : constant := PROT_READ;
312 PROT_OFF : constant := PROT_ALL;
314 function mprotect (addr : Address; len : size_t; prot : int) return int;
315 pragma Import (C, mprotect);
317 ---------------------------------------
318 -- Nonstandard Thread Initialization --
319 ---------------------------------------
321 -- Though not documented, pthread_init *must* be called before any other
324 procedure pthread_init;
325 pragma Import (C, pthread_init, "pthread_init");
327 -------------------------
328 -- POSIX.1c Section 3 --
329 -------------------------
332 (set : access sigset_t;
333 sig : access Signal) return int;
334 pragma Import (C, sigwait, "sigwait");
336 function pthread_kill
338 sig : Signal) return int;
339 pragma Import (C, pthread_kill, "pthread_kill");
341 function pthread_sigmask
343 set : access sigset_t;
344 oset : access sigset_t) return int;
345 pragma Import (C, pthread_sigmask, "sigthreadmask");
347 --------------------------
348 -- POSIX.1c Section 11 --
349 --------------------------
351 function pthread_mutexattr_init
352 (attr : access pthread_mutexattr_t) return int;
353 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
355 function pthread_mutexattr_destroy
356 (attr : access pthread_mutexattr_t) return int;
357 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
359 function pthread_mutex_init
360 (mutex : access pthread_mutex_t;
361 attr : access pthread_mutexattr_t) return int;
362 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
364 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
365 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
367 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
368 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
370 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
371 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
373 function pthread_condattr_init
374 (attr : access pthread_condattr_t) return int;
375 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
377 function pthread_condattr_destroy
378 (attr : access pthread_condattr_t) return int;
379 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
381 function pthread_cond_init
382 (cond : access pthread_cond_t;
383 attr : access pthread_condattr_t) return int;
384 pragma Import (C, pthread_cond_init, "pthread_cond_init");
386 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
387 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
389 function pthread_cond_signal (cond : access pthread_cond_t) return int;
390 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
392 function pthread_cond_wait
393 (cond : access pthread_cond_t;
394 mutex : access pthread_mutex_t) return int;
395 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
397 function pthread_cond_timedwait
398 (cond : access pthread_cond_t;
399 mutex : access pthread_mutex_t;
400 abstime : access timespec) return int;
401 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
403 Relative_Timed_Wait : constant Boolean := False;
404 -- pthread_cond_timedwait requires an absolute delay time
406 --------------------------
407 -- POSIX.1c Section 13 --
408 --------------------------
410 PTHREAD_PRIO_PROTECT : constant := 2;
412 function PTHREAD_PRIO_INHERIT return int;
413 -- Return value of C macro PTHREAD_PRIO_INHERIT. This function is needed
414 -- since the value is different between AIX versions.
416 function pthread_mutexattr_setprotocol
417 (attr : access pthread_mutexattr_t;
418 protocol : int) return int;
419 pragma Import (C, pthread_mutexattr_setprotocol);
421 function pthread_mutexattr_setprioceiling
422 (attr : access pthread_mutexattr_t;
423 prioceiling : int) return int;
424 pragma Import (C, pthread_mutexattr_setprioceiling);
426 type Array_5_Int is array (0 .. 5) of int;
427 type struct_sched_param is record
428 sched_priority : int;
430 sched_reserved : Array_5_Int;
433 function pthread_setschedparam
436 param : access struct_sched_param) return int;
437 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
439 function pthread_attr_setscope
440 (attr : access pthread_attr_t;
441 contentionscope : int) return int;
442 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
444 function pthread_attr_setinheritsched
445 (attr : access pthread_attr_t;
446 inheritsched : int) return int;
447 pragma Import (C, pthread_attr_setinheritsched);
449 function pthread_attr_setschedpolicy
450 (attr : access pthread_attr_t;
451 policy : int) return int;
452 pragma Import (C, pthread_attr_setschedpolicy);
454 function pthread_attr_setschedparam
455 (attr : access pthread_attr_t;
456 sched_param : int) return int;
457 pragma Import (C, pthread_attr_setschedparam);
459 function sched_yield return int;
460 -- AIX have a nonstandard sched_yield
462 --------------------------
463 -- P1003.1c Section 16 --
464 --------------------------
466 function pthread_attr_init (attributes : access pthread_attr_t) return int;
467 pragma Import (C, pthread_attr_init, "pthread_attr_init");
469 function pthread_attr_destroy
470 (attributes : access pthread_attr_t) return int;
471 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
473 function pthread_attr_setdetachstate
474 (attr : access pthread_attr_t;
475 detachstate : int) return int;
476 pragma Import (C, pthread_attr_setdetachstate);
478 function pthread_attr_setstacksize
479 (attr : access pthread_attr_t;
480 stacksize : size_t) return int;
481 pragma Import (C, pthread_attr_setstacksize);
483 function pthread_create
484 (thread : access pthread_t;
485 attributes : access pthread_attr_t;
486 start_routine : Thread_Body;
487 arg : System.Address)
489 pragma Import (C, pthread_create, "pthread_create");
491 procedure pthread_exit (status : System.Address);
492 pragma Import (C, pthread_exit, "pthread_exit");
494 function pthread_self return pthread_t;
495 pragma Import (C, pthread_self, "pthread_self");
497 --------------------------
498 -- POSIX.1c Section 17 --
499 --------------------------
501 function pthread_setspecific
502 (key : pthread_key_t;
503 value : System.Address) return int;
504 pragma Import (C, pthread_setspecific, "pthread_setspecific");
506 function pthread_getspecific (key : pthread_key_t) return System.Address;
507 pragma Import (C, pthread_getspecific, "pthread_getspecific");
509 type destructor_pointer is access
510 procedure (arg : System.Address);
512 function pthread_key_create
513 (key : access pthread_key_t;
514 destructor : destructor_pointer) return int;
515 pragma Import (C, pthread_key_create, "pthread_key_create");
518 type sigset_t is record
519 losigs : unsigned_long;
520 hisigs : unsigned_long;
522 pragma Convention (C_Pass_By_Copy, sigset_t);
524 type pid_t is new int;
526 type time_t is new long;
528 type timespec is record
532 pragma Convention (C, timespec);
534 type clockid_t is new int;
535 CLOCK_REALTIME : constant clockid_t := 0;
537 type struct_timeval is record
541 pragma Convention (C, struct_timeval);
543 type pthread_attr_t is new System.Address;
544 pragma Convention (C, pthread_attr_t);
545 -- typedef struct __pt_attr *pthread_attr_t;
547 type pthread_condattr_t is new System.Address;
548 pragma Convention (C, pthread_condattr_t);
549 -- typedef struct __pt_attr *pthread_condattr_t;
551 type pthread_mutexattr_t is new System.Address;
552 pragma Convention (C, pthread_mutexattr_t);
553 -- typedef struct __pt_attr *pthread_mutexattr_t;
555 type pthread_t is new System.Address;
556 pragma Convention (C, pthread_t);
557 -- typedef void *pthread_t;
560 type ptq_queue_ptr is access all ptq_queue;
562 type ptq_queue is record
563 ptq_next : ptq_queue_ptr;
564 ptq_prev : ptq_queue_ptr;
567 type Array_3_Int is array (0 .. 3) of int;
568 type pthread_mutex_t is record
574 ptmtx_owner : pthread_t;
576 attr : pthread_attr_t;
579 reserved : Array_3_Int;
581 pragma Convention (C, pthread_mutex_t);
582 type pthread_mutex_t_ptr is access pthread_mutex_t;
584 type pthread_cond_t is record
588 ptcv_waiters : ptq_queue;
590 attr : pthread_attr_t;
591 mutex : pthread_mutex_t_ptr;
595 pragma Convention (C, pthread_cond_t);
597 type pthread_key_t is new unsigned;
599 end System.OS_Interface;