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 --
10 -- Copyright (C) 1997-2001, 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, 59 Temple Place - Suite 330, Boston, --
21 -- MA 02111-1307, 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. It is --
31 -- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
32 -- State University (http://www.gnat.com). --
34 ------------------------------------------------------------------------------
36 -- This is a Sun OS (FSU THREADS) version of this package.
38 -- This package encapsulates all direct interfaces to OS services
39 -- that are needed by children of System.
41 -- PLEASE DO NOT add any with-clauses to this package
42 -- or remove the pragma Elaborate_Body.
43 -- It is designed to be a bottom-level (leaf) package.
46 package System.OS_Interface is
49 pragma Linker_Options ("-lgthreads");
50 pragma Linker_Options ("-lmalloc");
52 subtype int is Interfaces.C.int;
53 subtype short is Interfaces.C.short;
54 subtype long is Interfaces.C.long;
55 subtype unsigned is Interfaces.C.unsigned;
56 subtype unsigned_short is Interfaces.C.unsigned_short;
57 subtype unsigned_long is Interfaces.C.unsigned_long;
58 subtype unsigned_char is Interfaces.C.unsigned_char;
59 subtype plain_char is Interfaces.C.plain_char;
60 subtype size_t is Interfaces.C.size_t;
66 function errno return int;
67 pragma Import (C, errno, "__get_errno");
69 EAGAIN : constant := 11;
70 EINTR : constant := 4;
71 EINVAL : constant := 22;
72 ENOMEM : constant := 12;
73 ETIMEDOUT : constant := 60;
79 Max_Interrupt : constant := 31;
80 type Signal is new int range 0 .. Max_Interrupt;
81 for Signal'Size use int'Size;
83 SIGHUP : constant := 1; -- hangup
84 SIGINT : constant := 2; -- interrupt (rubout)
85 SIGQUIT : constant := 3; -- quit (ASCD FS)
86 SIGILL : constant := 4; -- illegal instruction (not reset)
87 SIGTRAP : constant := 5; -- trace trap (not reset)
88 SIGIOT : constant := 6; -- IOT instruction
89 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
90 SIGEMT : constant := 7; -- EMT instruction
91 SIGFPE : constant := 8; -- floating point exception
92 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
93 SIGBUS : constant := 10; -- bus error
94 SIGSEGV : constant := 11; -- segmentation violation
95 SIGSYS : constant := 12; -- bad argument to system call
96 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
97 SIGALRM : constant := 14; -- alarm clock
98 SIGTERM : constant := 15; -- software termination signal from kill
99 SIGUSR1 : constant := 30; -- user defined signal 1
100 SIGUSR2 : constant := 31; -- user defined signal 2
101 SIGCLD : constant := 20; -- alias for SIGCHLD
102 SIGCHLD : constant := 20; -- child status change
103 SIGWINCH : constant := 28; -- window size change
104 SIGURG : constant := 16; -- urgent condition on IO channel
105 SIGPOLL : constant := 23; -- pollable event occurred
106 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
107 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
108 SIGTSTP : constant := 18; -- user stop requested from tty
109 SIGCONT : constant := 19; -- stopped process has been continued
110 SIGTTIN : constant := 21; -- background tty read attempted
111 SIGTTOU : constant := 22; -- background tty write attempted
112 SIGVTALRM : constant := 26; -- virtual timer expired
113 SIGPROF : constant := 27; -- profiling timer expired
114 SIGXCPU : constant := 24; -- CPU time limit exceeded
115 SIGXFSZ : constant := 25; -- filesize limit exceeded
117 type sigset_t is private;
119 function sigaddset (set : access sigset_t; sig : Signal) return int;
120 pragma Import (C, sigaddset, "sigaddset");
122 function sigdelset (set : access sigset_t; sig : Signal) return int;
123 pragma Import (C, sigdelset, "sigdelset");
125 function sigfillset (set : access sigset_t) return int;
126 pragma Import (C, sigfillset, "sigfillset");
128 function sigismember (set : access sigset_t; sig : Signal) return int;
129 pragma Import (C, sigismember, "sigismember");
131 function sigemptyset (set : access sigset_t) return int;
132 pragma Import (C, sigemptyset, "sigemptyset");
134 type struct_sigaction is record
135 sa_handler : System.Address;
139 pragma Convention (C, struct_sigaction);
140 type struct_sigaction_ptr is access all struct_sigaction;
142 SIG_BLOCK : constant := 1;
143 SIG_UNBLOCK : constant := 2;
144 SIG_SETMASK : constant := 4;
146 SIG_DFL : constant := 0;
147 SIG_IGN : constant := 1;
151 act : struct_sigaction_ptr;
152 oact : struct_sigaction_ptr) return int;
153 pragma Import (C, sigaction, "sigaction");
159 Time_Slice_Supported : constant Boolean := False;
160 -- Indicates wether time slicing is supported (i.e FSU threads have been
161 -- compiled with DEF_RR)
163 type timespec is private;
165 type clockid_t is private;
167 CLOCK_REALTIME : constant clockid_t;
169 function clock_gettime
170 (clock_id : clockid_t;
171 tp : access timespec) return int;
172 pragma Import (C, clock_gettime, "clock_gettime");
174 function To_Duration (TS : timespec) return Duration;
175 pragma Inline (To_Duration);
177 function To_Timespec (D : Duration) return timespec;
178 pragma Inline (To_Timespec);
180 type struct_timeval is private;
182 function To_Duration (TV : struct_timeval) return Duration;
183 pragma Inline (To_Duration);
185 function To_Timeval (D : Duration) return struct_timeval;
186 pragma Inline (To_Timeval);
188 -------------------------
189 -- Priority Scheduling --
190 -------------------------
192 SCHED_FIFO : constant := 0;
193 SCHED_RR : constant := 1;
194 SCHED_OTHER : constant := 2;
200 type pid_t is private;
202 function kill (pid : pid_t; sig : Signal) return int;
203 pragma Import (C, kill, "kill");
205 function getpid return pid_t;
206 pragma Import (C, getpid, "getpid");
212 function lwp_self return System.Address;
213 -- lwp_self does not exist on this thread library, revert to pthread_self
214 -- which is the closest approximation (with getpid). This function is
215 -- needed to share 7staprop.adb across POSIX-like targets.
216 pragma Import (C, lwp_self, "pthread_self");
222 type Thread_Body is access
223 function (arg : System.Address) return System.Address;
224 type pthread_t is private;
225 subtype Thread_Id is pthread_t;
227 type pthread_mutex_t is limited private;
228 type pthread_cond_t is limited private;
229 type pthread_attr_t is limited private;
230 type pthread_mutexattr_t is limited private;
231 type pthread_condattr_t is limited private;
232 type pthread_key_t is private;
234 PTHREAD_CREATE_DETACHED : constant := 1;
240 Stack_Base_Available : constant Boolean := False;
241 -- Indicates wether the stack base is available on this target.
242 -- This allows us to share s-osinte.adb between all the FSU run time.
243 -- Note that this value can only be true if pthread_t has a complete
244 -- definition that corresponds exactly to the C header files.
246 function Get_Stack_Base (thread : pthread_t) return Address;
247 pragma Inline (Get_Stack_Base);
248 -- returns the stack base of the specified thread.
249 -- Only call this function when Stack_Base_Available is True.
251 function Get_Page_Size return size_t;
252 function Get_Page_Size return Address;
253 pragma Import (C, Get_Page_Size, "getpagesize");
254 -- returns the size of a page, or 0 if this is not relevant on this
257 PROT_NONE : constant := 0;
258 PROT_READ : constant := 1;
259 PROT_WRITE : constant := 2;
260 PROT_EXEC : constant := 4;
261 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
263 PROT_ON : constant := PROT_NONE;
264 PROT_OFF : constant := PROT_ALL;
266 function mprotect (addr : Address; len : size_t; prot : int) return int;
267 pragma Import (C, mprotect);
269 ---------------------------------------
270 -- Nonstandard Thread Initialization --
271 ---------------------------------------
272 -- FSU_THREADS requires pthread_init, which is nonstandard
273 -- and this should be invoked during the elaboration of s-taprop.adb
274 procedure pthread_init;
275 pragma Import (C, pthread_init, "pthread_init");
277 -------------------------
278 -- POSIX.1c Section 3 --
279 -------------------------
281 function sigwait (set : access sigset_t; sig : access Signal) return int;
282 -- FSU_THREADS has a nonstandard sigwait
284 function pthread_kill (thread : pthread_t; sig : Signal) return int;
285 pragma Import (C, pthread_kill, "pthread_kill");
287 -- FSU threads does not have pthread_sigmask. Instead, it uses
288 -- sigprocmask to do the signal handling when the thread library is
291 type sigset_t_ptr is access all sigset_t;
293 function pthread_sigmask
296 oset : sigset_t_ptr) return int;
297 pragma Import (C, pthread_sigmask, "sigprocmask");
299 --------------------------
300 -- POSIX.1c Section 11 --
301 --------------------------
303 function pthread_mutexattr_init
304 (attr : access pthread_mutexattr_t) return int;
305 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
307 function pthread_mutexattr_destroy
308 (attr : access pthread_mutexattr_t) return int;
309 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
311 function pthread_mutex_init
312 (mutex : access pthread_mutex_t;
313 attr : access pthread_mutexattr_t) return int;
314 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
316 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
317 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
319 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
320 -- FSU_THREADS has nonstandard pthread_mutex_lock
322 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
323 -- FSU_THREADS has nonstandard pthread_mutex_lock
325 function pthread_condattr_init
326 (attr : access pthread_condattr_t) return int;
327 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
329 function pthread_condattr_destroy
330 (attr : access pthread_condattr_t) return int;
331 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
333 function pthread_cond_init
334 (cond : access pthread_cond_t;
335 attr : access pthread_condattr_t) return int;
336 pragma Import (C, pthread_cond_init, "pthread_cond_init");
338 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
339 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
341 function pthread_cond_signal (cond : access pthread_cond_t) return int;
342 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
344 function pthread_cond_wait
345 (cond : access pthread_cond_t;
346 mutex : access pthread_mutex_t) return int;
347 -- FSU_THREADS has a nonstandard pthread_cond_wait
349 function pthread_cond_timedwait
350 (cond : access pthread_cond_t;
351 mutex : access pthread_mutex_t;
352 abstime : access timespec) return int;
353 -- FSU_THREADS has a nonstandard pthread_cond_timedwait
355 Relative_Timed_Wait : constant Boolean := False;
356 -- pthread_cond_timedwait requires an absolute delay time
358 --------------------------
359 -- POSIX.1c Section 13 --
360 --------------------------
362 PTHREAD_PRIO_NONE : constant := 0;
363 PTHREAD_PRIO_PROTECT : constant := 2;
364 PTHREAD_PRIO_INHERIT : constant := 1;
366 function pthread_mutexattr_setprotocol
367 (attr : access pthread_mutexattr_t;
368 protocol : int) return int;
369 pragma Import (C, pthread_mutexattr_setprotocol);
371 function pthread_mutexattr_setprioceiling
372 (attr : access pthread_mutexattr_t;
373 prioceiling : int) return int;
375 (C, pthread_mutexattr_setprioceiling,
376 "pthread_mutexattr_setprio_ceiling");
378 type struct_sched_param is record
379 sched_priority : int; -- scheduling priority
382 function pthread_setschedparam
385 param : access struct_sched_param) return int;
386 -- FSU_THREADS does not have pthread_setschedparam
388 function pthread_attr_setscope
389 (attr : access pthread_attr_t;
390 contentionscope : int) return int;
391 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
393 function pthread_attr_setinheritsched
394 (attr : access pthread_attr_t;
395 inheritsched : int) return int;
396 pragma Import (C, pthread_attr_setinheritsched);
398 function pthread_attr_setschedpolicy
399 (attr : access pthread_attr_t;
400 policy : int) return int;
401 pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
403 function pthread_attr_setschedparam
404 (attr : access pthread_attr_t;
405 sched_param : int) return int;
406 pragma Import (C, pthread_attr_setschedparam, "pthread_attr_setschedparam");
408 function sched_yield return int;
409 -- FSU_THREADS does not have sched_yield;
411 ---------------------------
412 -- P1003.1c - Section 16 --
413 ---------------------------
415 function pthread_attr_init (attributes : access pthread_attr_t) return int;
416 pragma Import (C, pthread_attr_init, "pthread_attr_init");
418 function pthread_attr_destroy
419 (attributes : access pthread_attr_t) return int;
420 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
422 function pthread_attr_setdetachstate
423 (attr : access pthread_attr_t;
424 detachstate : int) return int;
425 -- FSU_THREADS has a nonstandard pthread_attr_setdetachstate
427 function pthread_attr_setstacksize
428 (attr : access pthread_attr_t;
429 stacksize : size_t) return int;
430 pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
432 function pthread_create
433 (thread : access pthread_t;
434 attributes : access pthread_attr_t;
435 start_routine : Thread_Body;
436 arg : System.Address) return int;
437 pragma Import (C, pthread_create, "pthread_create");
439 procedure pthread_exit (status : System.Address);
440 pragma Import (C, pthread_exit, "pthread_exit");
442 function pthread_self return pthread_t;
443 pragma Import (C, pthread_self, "pthread_self");
445 --------------------------
446 -- POSIX.1c Section 17 --
447 --------------------------
449 function pthread_setspecific
450 (key : pthread_key_t;
451 value : System.Address) return int;
452 pragma Import (C, pthread_setspecific, "pthread_setspecific");
454 function pthread_getspecific (key : pthread_key_t) return System.Address;
455 -- FSU_THREADS has a nonstandard pthread_getspecific
457 type destructor_pointer is access procedure (arg : System.Address);
459 function pthread_key_create
460 (key : access pthread_key_t;
461 destructor : destructor_pointer)
463 pragma Import (C, pthread_key_create, "pthread_key_create");
467 type sigset_t is new int;
469 type pid_t is new int;
471 type time_t is new long;
473 type timespec is record
477 pragma Convention (C, timespec);
479 type clockid_t is new int;
480 CLOCK_REALTIME : constant clockid_t := 0;
482 type struct_timeval is record
486 pragma Convention (C, struct_timeval);
488 type pthread_attr_t is record
491 contentionscope : int;
496 starttime : timespec;
500 pragma Convention (C, pthread_attr_t);
502 type pthread_condattr_t is record
505 pragma Convention (C, pthread_condattr_t);
507 type pthread_mutexattr_t is record
512 pragma Convention (C, pthread_mutexattr_t);
514 type sigjmp_buf is array (Integer range 0 .. 9) of int;
516 type pthread_t_struct is record
517 context : sigjmp_buf;
521 stack_base : System.Address;
523 pragma Convention (C, pthread_t_struct);
525 type pthread_t is access all pthread_t_struct;
527 type queue_t is record
528 head : System.Address;
529 tail : System.Address;
531 pragma Convention (C, queue_t);
533 type pthread_mutex_t is record
536 owner : System.Address;
540 prev_max_ceiling_prio : int;
542 pragma Convention (C, pthread_mutex_t);
544 type pthread_cond_t is record
548 mutex : System.Address;
550 pragma Convention (C, pthread_cond_t);
552 type pthread_key_t is new int;
554 end System.OS_Interface;