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) 1995-2010, 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 HPUX 11.0 (Native THREADS) version of this package
35 -- This package encapsulates all direct interfaces to OS services that are
36 -- 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 ("-lpthread");
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 := 238;
77 Max_Interrupt : constant := 44;
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 := 16; -- user defined signal 1
98 SIGUSR2 : constant := 17; -- user defined signal 2
99 SIGCLD : constant := 18; -- alias for SIGCHLD
100 SIGCHLD : constant := 18; -- child status change
101 SIGPWR : constant := 19; -- power-fail restart
102 SIGVTALRM : constant := 20; -- virtual timer alarm
103 SIGPROF : constant := 21; -- profiling timer alarm
104 SIGIO : constant := 22; -- asynchronous I/O
105 SIGPOLL : constant := 22; -- pollable event occurred
106 SIGWINCH : constant := 23; -- window size change
107 SIGSTOP : constant := 24; -- stop (cannot be caught or ignored)
108 SIGTSTP : constant := 25; -- user stop requested from tty
109 SIGCONT : constant := 26; -- stopped process has been continued
110 SIGTTIN : constant := 27; -- background tty read attempted
111 SIGTTOU : constant := 28; -- background tty write attempted
112 SIGURG : constant := 29; -- urgent condition on IO channel
113 SIGLOST : constant := 30; -- remote lock lost (NFS)
114 SIGDIL : constant := 32; -- DIL signal
115 SIGXCPU : constant := 33; -- CPU time limit exceeded (setrlimit)
116 SIGXFSZ : constant := 34; -- file size limit exceeded (setrlimit)
117 SIGCANCEL : constant := 35; -- used for pthread cancellation.
118 SIGGFAULT : constant := 36; -- Graphics framebuffer fault
120 SIGADAABORT : constant := SIGABRT;
121 -- Note: on other targets, we usually use SIGABRT, but on HPUX, it
122 -- appears that SIGABRT can't be used in sigwait(), so we use SIGTERM.
123 -- Do we use SIGTERM or SIGABRT???
125 type Signal_Set is array (Natural range <>) of Signal;
127 Unmasked : constant Signal_Set :=
128 (SIGABRT, SIGPIPE, SIGBUS, SIGTRAP, SIGTTIN, SIGTTOU, SIGTSTP, SIGPROF,
129 SIGALRM, SIGVTALRM, SIGIO, SIGCHLD);
131 Reserved : constant Signal_Set := (SIGKILL, SIGSTOP);
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#10#;
159 SA_ONSTACK : constant := 16#01#;
161 SIG_BLOCK : constant := 0;
162 SIG_UNBLOCK : constant := 1;
163 SIG_SETMASK : constant := 2;
165 SIG_DFL : constant := 0;
166 SIG_IGN : constant := 1;
170 act : struct_sigaction_ptr;
171 oact : struct_sigaction_ptr) return int;
172 pragma Import (C, sigaction, "sigaction");
178 Time_Slice_Supported : constant Boolean := True;
179 -- Indicates whether time slicing is supported
181 type timespec is private;
183 type clockid_t is private;
185 CLOCK_REALTIME : constant clockid_t;
187 function clock_gettime
188 (clock_id : clockid_t;
189 tp : access timespec) return int;
190 pragma Import (C, clock_gettime, "clock_gettime");
192 function clock_getres
193 (clock_id : clockid_t;
194 res : access timespec) return int;
195 pragma Import (C, clock_getres, "clock_getres");
197 function To_Duration (TS : timespec) return Duration;
198 pragma Inline (To_Duration);
200 function To_Timespec (D : Duration) return timespec;
201 pragma Inline (To_Timespec);
203 type struct_timezone is record
204 tz_minuteswest : int;
207 pragma Convention (C, struct_timezone);
208 type struct_timezone_ptr is access all struct_timezone;
210 -------------------------
211 -- Priority Scheduling --
212 -------------------------
214 SCHED_FIFO : constant := 0;
215 SCHED_RR : constant := 1;
216 SCHED_OTHER : constant := 2;
218 function To_Target_Priority
219 (Prio : System.Any_Priority) return Interfaces.C.int;
220 -- Maps System.Any_Priority to a POSIX priority
226 type pid_t is private;
228 function kill (pid : pid_t; sig : Signal) return int;
229 pragma Import (C, kill, "kill");
231 function getpid return pid_t;
232 pragma Import (C, getpid, "getpid");
238 function lwp_self return System.Address;
239 pragma Import (C, lwp_self, "_lwp_self");
245 type Thread_Body is access
246 function (arg : System.Address) return System.Address;
247 pragma Convention (C, Thread_Body);
249 function Thread_Body_Access is new
250 Ada.Unchecked_Conversion (System.Address, Thread_Body);
252 type pthread_t is private;
253 subtype Thread_Id is pthread_t;
255 type pthread_mutex_t is limited private;
256 type pthread_cond_t is limited private;
257 type pthread_attr_t is limited private;
258 type pthread_mutexattr_t is limited private;
259 type pthread_condattr_t is limited private;
260 type pthread_key_t is private;
262 PTHREAD_CREATE_DETACHED : constant := 16#de#;
264 PTHREAD_SCOPE_PROCESS : constant := 2;
265 PTHREAD_SCOPE_SYSTEM : constant := 1;
271 type stack_t is record
272 ss_sp : System.Address;
276 pragma Convention (C, stack_t);
279 (ss : not null access stack_t;
280 oss : access stack_t) return int;
281 pragma Import (C, sigaltstack, "sigaltstack");
283 Alternate_Stack : aliased System.Address;
284 pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
285 -- The alternate signal stack for stack overflows
287 Alternate_Stack_Size : constant := 16 * 1024;
288 -- This must be in keeping with init.c:__gnat_alternate_stack
290 Stack_Base_Available : constant Boolean := False;
291 -- Indicates whether the stack base is available on this target
293 function Get_Stack_Base (thread : pthread_t) return Address;
294 pragma Inline (Get_Stack_Base);
295 -- Returns the stack base of the specified thread. Only call this function
296 -- when Stack_Base_Available is True.
298 function Get_Page_Size return size_t;
299 function Get_Page_Size return Address;
300 pragma Import (C, Get_Page_Size, "getpagesize");
301 -- Returns the size of a page
303 PROT_NONE : constant := 0;
304 PROT_READ : constant := 1;
305 PROT_WRITE : constant := 2;
306 PROT_EXEC : constant := 4;
307 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
308 PROT_ON : constant := PROT_READ;
309 PROT_OFF : constant := PROT_ALL;
311 function mprotect (addr : Address; len : size_t; prot : int) return int;
312 pragma Import (C, mprotect);
314 ---------------------------------------
315 -- Nonstandard Thread Initialization --
316 ---------------------------------------
318 procedure pthread_init;
319 pragma Inline (pthread_init);
320 -- This is a dummy procedure to share some GNULLI files
322 -------------------------
323 -- POSIX.1c Section 3 --
324 -------------------------
327 (set : access sigset_t;
328 sig : access Signal) return int;
329 pragma Import (C, sigwait, "sigwait");
331 function pthread_kill
333 sig : Signal) return int;
334 pragma Import (C, pthread_kill, "pthread_kill");
336 function pthread_sigmask
338 set : access sigset_t;
339 oset : access sigset_t) return int;
340 pragma Import (C, pthread_sigmask, "pthread_sigmask");
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 := 16#100#;
406 PTHREAD_PRIO_PROTECT : constant := 16#200#;
407 PTHREAD_PRIO_INHERIT : constant := 16#400#;
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 Array_7_Int is array (0 .. 6) of int;
420 type struct_sched_param is record
421 sched_priority : int;
422 sched_reserved : Array_7_Int;
425 function pthread_setschedparam
428 param : access struct_sched_param)
430 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
432 function pthread_attr_setscope
433 (attr : access pthread_attr_t;
434 contentionscope : int) return int;
435 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
437 function pthread_attr_setinheritsched
438 (attr : access pthread_attr_t;
439 inheritsched : int) return int;
440 pragma Import (C, pthread_attr_setinheritsched);
442 function pthread_attr_setschedpolicy
443 (attr : access pthread_attr_t;
444 policy : int) return int;
445 pragma Import (C, pthread_attr_setschedpolicy);
447 function sched_yield return int;
448 pragma Import (C, sched_yield, "sched_yield");
450 --------------------------
451 -- P1003.1c Section 16 --
452 --------------------------
454 function pthread_attr_init
455 (attributes : access pthread_attr_t) return int;
456 pragma Import (C, pthread_attr_init, "__pthread_attr_init_system");
458 function pthread_attr_destroy
459 (attributes : access pthread_attr_t) return int;
460 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
462 function pthread_attr_setdetachstate
463 (attr : access pthread_attr_t;
464 detachstate : int) return int;
465 pragma Import (C, pthread_attr_setdetachstate);
467 function pthread_attr_setstacksize
468 (attr : access pthread_attr_t;
469 stacksize : size_t) return int;
470 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
472 function pthread_create
473 (thread : access pthread_t;
474 attributes : access pthread_attr_t;
475 start_routine : Thread_Body;
476 arg : System.Address) return int;
477 pragma Import (C, pthread_create, "__pthread_create_system");
479 procedure pthread_exit (status : System.Address);
480 pragma Import (C, pthread_exit, "pthread_exit");
482 function pthread_self return pthread_t;
483 pragma Import (C, pthread_self, "pthread_self");
485 --------------------------
486 -- POSIX.1c Section 17 --
487 --------------------------
489 function pthread_setspecific
490 (key : pthread_key_t;
491 value : System.Address) return int;
492 pragma Import (C, pthread_setspecific, "pthread_setspecific");
494 function pthread_getspecific (key : pthread_key_t) return System.Address;
495 pragma Import (C, pthread_getspecific, "pthread_getspecific");
497 type destructor_pointer is access procedure (arg : System.Address);
498 pragma Convention (C, destructor_pointer);
500 function pthread_key_create
501 (key : access pthread_key_t;
502 destructor : destructor_pointer) return int;
503 pragma Import (C, pthread_key_create, "pthread_key_create");
507 type unsigned_int_array_8 is array (0 .. 7) of unsigned;
508 type sigset_t is record
509 sigset : unsigned_int_array_8;
511 pragma Convention (C_Pass_By_Copy, sigset_t);
513 type pid_t is new int;
515 type time_t is new long;
517 type timespec is record
521 pragma Convention (C, timespec);
523 type clockid_t is new int;
524 CLOCK_REALTIME : constant clockid_t := 1;
526 type pthread_attr_t is new int;
527 type pthread_condattr_t is new int;
528 type pthread_mutexattr_t is new int;
529 type pthread_t is new int;
531 type short_array is array (Natural range <>) of short;
532 type int_array is array (Natural range <>) of int;
534 type pthread_mutex_t is record
535 m_short : short_array (0 .. 1);
537 m_int1 : int_array (0 .. 3);
541 -- actually m_ptr is a void*, and on 32 bit ABI, m_pad is added so that
542 -- this field takes 64 bits. On 64 bit ABI, m_pad is gone, and m_ptr is
543 -- a 64 bit void*. Assume int'Size = 32.
545 m_int2 : int_array (0 .. 1);
546 m_int3 : int_array (0 .. 3);
547 m_short2 : short_array (0 .. 1);
548 m_int4 : int_array (0 .. 4);
549 m_int5 : int_array (0 .. 1);
551 for pthread_mutex_t'Alignment use System.Address'Alignment;
552 pragma Convention (C, pthread_mutex_t);
554 type pthread_cond_t is record
555 c_short : short_array (0 .. 1);
557 c_int1 : int_array (0 .. 3);
559 m_ptr : int; -- see comment in pthread_mutex_t
560 c_int2 : int_array (0 .. 1);
561 c_int3 : int_array (0 .. 1);
562 c_int4 : int_array (0 .. 1);
564 for pthread_cond_t'Alignment use System.Address'Alignment;
565 pragma Convention (C, pthread_cond_t);
567 type pthread_key_t is new int;
569 end System.OS_Interface;