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 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;
186 CLOCK_MONOTONIC : constant clockid_t;
188 function clock_gettime
189 (clock_id : clockid_t;
190 tp : access timespec) return int;
191 pragma Import (C, clock_gettime, "clock_gettime");
193 function clock_getres
194 (clock_id : clockid_t;
195 res : access timespec) return int;
196 pragma Import (C, clock_getres, "clock_getres");
198 function To_Duration (TS : timespec) return Duration;
199 pragma Inline (To_Duration);
201 function To_Timespec (D : Duration) return timespec;
202 pragma Inline (To_Timespec);
204 type struct_timezone is record
205 tz_minuteswest : int;
208 pragma Convention (C, struct_timezone);
209 type struct_timezone_ptr is access all struct_timezone;
211 -------------------------
212 -- Priority Scheduling --
213 -------------------------
215 SCHED_FIFO : constant := 0;
216 SCHED_RR : constant := 1;
217 SCHED_OTHER : constant := 2;
219 function To_Target_Priority
220 (Prio : System.Any_Priority) return Interfaces.C.int;
221 -- Maps System.Any_Priority to a POSIX priority
227 type pid_t is private;
229 function kill (pid : pid_t; sig : Signal) return int;
230 pragma Import (C, kill, "kill");
232 function getpid return pid_t;
233 pragma Import (C, getpid, "getpid");
239 function lwp_self return System.Address;
240 pragma Import (C, lwp_self, "_lwp_self");
246 type Thread_Body is access
247 function (arg : System.Address) return System.Address;
248 pragma Convention (C, Thread_Body);
250 function Thread_Body_Access is new
251 Ada.Unchecked_Conversion (System.Address, Thread_Body);
253 type pthread_t is private;
254 subtype Thread_Id is pthread_t;
256 type pthread_mutex_t is limited private;
257 type pthread_cond_t is limited private;
258 type pthread_attr_t is limited private;
259 type pthread_mutexattr_t is limited private;
260 type pthread_condattr_t is limited private;
261 type pthread_key_t is private;
263 PTHREAD_CREATE_DETACHED : constant := 16#de#;
265 PTHREAD_SCOPE_PROCESS : constant := 2;
266 PTHREAD_SCOPE_SYSTEM : constant := 1;
268 -- Read/Write lock not supported on HPUX. To add support both types
269 -- pthread_rwlock_t and pthread_rwlockattr_t must properly be defined
270 -- with the associated routines pthread_rwlock_[init/destroy] and
271 -- pthread_rwlock_[rdlock/wrlock/unlock].
273 subtype pthread_rwlock_t is pthread_mutex_t;
274 subtype pthread_rwlockattr_t is pthread_mutexattr_t;
280 type stack_t is record
281 ss_sp : System.Address;
285 pragma Convention (C, stack_t);
288 (ss : not null access stack_t;
289 oss : access stack_t) return int;
290 pragma Import (C, sigaltstack, "sigaltstack");
292 Alternate_Stack : aliased System.Address;
293 pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
294 -- The alternate signal stack for stack overflows
296 Alternate_Stack_Size : constant := 16 * 1024;
297 -- This must be in keeping with init.c:__gnat_alternate_stack
299 Stack_Base_Available : constant Boolean := False;
300 -- Indicates whether the stack base is available on this target
302 function Get_Stack_Base (thread : pthread_t) return Address;
303 pragma Inline (Get_Stack_Base);
304 -- Returns the stack base of the specified thread. Only call this function
305 -- when Stack_Base_Available is True.
307 function Get_Page_Size return size_t;
308 function Get_Page_Size return Address;
309 pragma Import (C, Get_Page_Size, "getpagesize");
310 -- Returns the size of a page
312 PROT_NONE : constant := 0;
313 PROT_READ : constant := 1;
314 PROT_WRITE : constant := 2;
315 PROT_EXEC : constant := 4;
316 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
317 PROT_ON : constant := PROT_READ;
318 PROT_OFF : constant := PROT_ALL;
320 function mprotect (addr : Address; len : size_t; prot : int) return int;
321 pragma Import (C, mprotect);
323 ---------------------------------------
324 -- Nonstandard Thread Initialization --
325 ---------------------------------------
327 procedure pthread_init;
328 pragma Inline (pthread_init);
329 -- This is a dummy procedure to share some GNULLI files
331 -------------------------
332 -- POSIX.1c Section 3 --
333 -------------------------
336 (set : access sigset_t;
337 sig : access Signal) return int;
338 pragma Import (C, sigwait, "sigwait");
340 function pthread_kill
342 sig : Signal) return int;
343 pragma Import (C, pthread_kill, "pthread_kill");
345 function pthread_sigmask
347 set : access sigset_t;
348 oset : access sigset_t) return int;
349 pragma Import (C, pthread_sigmask, "pthread_sigmask");
351 --------------------------
352 -- POSIX.1c Section 11 --
353 --------------------------
355 function pthread_mutexattr_init
356 (attr : access pthread_mutexattr_t) return int;
357 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
359 function pthread_mutexattr_destroy
360 (attr : access pthread_mutexattr_t) return int;
361 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
363 function pthread_mutex_init
364 (mutex : access pthread_mutex_t;
365 attr : access pthread_mutexattr_t) return int;
366 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
368 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
369 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
371 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
372 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
374 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
375 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
377 function pthread_condattr_init
378 (attr : access pthread_condattr_t) return int;
379 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
381 function pthread_condattr_destroy
382 (attr : access pthread_condattr_t) return int;
383 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
385 function pthread_cond_init
386 (cond : access pthread_cond_t;
387 attr : access pthread_condattr_t) return int;
388 pragma Import (C, pthread_cond_init, "pthread_cond_init");
390 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
391 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
393 function pthread_cond_signal (cond : access pthread_cond_t) return int;
394 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
396 function pthread_cond_wait
397 (cond : access pthread_cond_t;
398 mutex : access pthread_mutex_t) return int;
399 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
401 function pthread_cond_timedwait
402 (cond : access pthread_cond_t;
403 mutex : access pthread_mutex_t;
404 abstime : access timespec) return int;
405 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
407 Relative_Timed_Wait : constant Boolean := False;
408 -- pthread_cond_timedwait requires an absolute delay time
410 --------------------------
411 -- POSIX.1c Section 13 --
412 --------------------------
414 PTHREAD_PRIO_NONE : constant := 16#100#;
415 PTHREAD_PRIO_PROTECT : constant := 16#200#;
416 PTHREAD_PRIO_INHERIT : constant := 16#400#;
418 function pthread_mutexattr_setprotocol
419 (attr : access pthread_mutexattr_t;
420 protocol : int) return int;
421 pragma Import (C, pthread_mutexattr_setprotocol);
423 function pthread_mutexattr_setprioceiling
424 (attr : access pthread_mutexattr_t;
425 prioceiling : int) return int;
426 pragma Import (C, pthread_mutexattr_setprioceiling);
428 type Array_7_Int is array (0 .. 6) of int;
429 type struct_sched_param is record
430 sched_priority : int;
431 sched_reserved : Array_7_Int;
434 function pthread_setschedparam
437 param : access struct_sched_param)
439 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
441 function pthread_attr_setscope
442 (attr : access pthread_attr_t;
443 contentionscope : int) return int;
444 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
446 function pthread_attr_setinheritsched
447 (attr : access pthread_attr_t;
448 inheritsched : int) return int;
449 pragma Import (C, pthread_attr_setinheritsched);
451 function pthread_attr_setschedpolicy
452 (attr : access pthread_attr_t;
453 policy : int) return int;
454 pragma Import (C, pthread_attr_setschedpolicy);
456 function sched_yield return int;
457 pragma Import (C, sched_yield, "sched_yield");
459 --------------------------
460 -- P1003.1c Section 16 --
461 --------------------------
463 function pthread_attr_init
464 (attributes : access pthread_attr_t) return int;
465 pragma Import (C, pthread_attr_init, "__pthread_attr_init_system");
467 function pthread_attr_destroy
468 (attributes : access pthread_attr_t) return int;
469 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
471 function pthread_attr_setdetachstate
472 (attr : access pthread_attr_t;
473 detachstate : int) return int;
474 pragma Import (C, pthread_attr_setdetachstate);
476 function pthread_attr_setstacksize
477 (attr : access pthread_attr_t;
478 stacksize : size_t) return int;
479 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
481 function pthread_create
482 (thread : access pthread_t;
483 attributes : access pthread_attr_t;
484 start_routine : Thread_Body;
485 arg : System.Address) return int;
486 pragma Import (C, pthread_create, "__pthread_create_system");
488 procedure pthread_exit (status : System.Address);
489 pragma Import (C, pthread_exit, "pthread_exit");
491 function pthread_self return pthread_t;
492 pragma Import (C, pthread_self, "pthread_self");
494 --------------------------
495 -- POSIX.1c Section 17 --
496 --------------------------
498 function pthread_setspecific
499 (key : pthread_key_t;
500 value : System.Address) return int;
501 pragma Import (C, pthread_setspecific, "pthread_setspecific");
503 function pthread_getspecific (key : pthread_key_t) return System.Address;
504 pragma Import (C, pthread_getspecific, "pthread_getspecific");
506 type destructor_pointer is access procedure (arg : System.Address);
507 pragma Convention (C, destructor_pointer);
509 function pthread_key_create
510 (key : access pthread_key_t;
511 destructor : destructor_pointer) return int;
512 pragma Import (C, pthread_key_create, "pthread_key_create");
516 type unsigned_int_array_8 is array (0 .. 7) of unsigned;
517 type sigset_t is record
518 sigset : unsigned_int_array_8;
520 pragma Convention (C_Pass_By_Copy, sigset_t);
522 type pid_t is new int;
524 type time_t is new long;
526 type timespec is record
530 pragma Convention (C, timespec);
532 type clockid_t is new int;
533 CLOCK_REALTIME : constant clockid_t := 1;
534 CLOCK_MONOTONIC : constant clockid_t := CLOCK_REALTIME;
536 type pthread_attr_t is new int;
537 type pthread_condattr_t is new int;
538 type pthread_mutexattr_t is new int;
539 type pthread_t is new int;
541 type short_array is array (Natural range <>) of short;
542 type int_array is array (Natural range <>) of int;
544 type pthread_mutex_t is record
545 m_short : short_array (0 .. 1);
547 m_int1 : int_array (0 .. 3);
551 -- actually m_ptr is a void*, and on 32 bit ABI, m_pad is added so that
552 -- this field takes 64 bits. On 64 bit ABI, m_pad is gone, and m_ptr is
553 -- a 64 bit void*. Assume int'Size = 32.
555 m_int2 : int_array (0 .. 1);
556 m_int3 : int_array (0 .. 3);
557 m_short2 : short_array (0 .. 1);
558 m_int4 : int_array (0 .. 4);
559 m_int5 : int_array (0 .. 1);
561 for pthread_mutex_t'Alignment use System.Address'Alignment;
562 pragma Convention (C, pthread_mutex_t);
564 type pthread_cond_t is record
565 c_short : short_array (0 .. 1);
567 c_int1 : int_array (0 .. 3);
569 m_ptr : int; -- see comment in pthread_mutex_t
570 c_int2 : int_array (0 .. 1);
571 c_int3 : int_array (0 .. 1);
572 c_int4 : int_array (0 .. 1);
574 for pthread_cond_t'Alignment use System.Address'Alignment;
575 pragma Convention (C, pthread_cond_t);
577 type pthread_key_t is new int;
579 end System.OS_Interface;