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 Darwin pthreads version of this package
37 -- This package includes all direct interfaces to OS services that are needed
38 -- by children of System.
40 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
41 -- Elaborate_Body. It is designed to be a bottom-level (leaf) package.
44 package System.OS_Interface is
47 subtype int is Interfaces.C.int;
48 subtype short is Interfaces.C.short;
49 subtype long is Interfaces.C.long;
50 subtype unsigned is Interfaces.C.unsigned;
51 subtype unsigned_short is Interfaces.C.unsigned_short;
52 subtype unsigned_long is Interfaces.C.unsigned_long;
53 subtype unsigned_char is Interfaces.C.unsigned_char;
54 subtype plain_char is Interfaces.C.plain_char;
55 subtype size_t is Interfaces.C.size_t;
61 function errno return int;
62 pragma Import (C, errno, "__get_errno");
64 EINTR : constant := 4;
65 ENOMEM : constant := 12;
66 EINVAL : constant := 22;
67 EAGAIN : constant := 35;
68 ETIMEDOUT : constant := 60;
74 Max_Interrupt : constant := 31;
75 type Signal is new int range 0 .. Max_Interrupt;
76 for Signal'Size use int'Size;
78 SIGHUP : constant := 1; -- hangup
79 SIGINT : constant := 2; -- interrupt (rubout)
80 SIGQUIT : constant := 3; -- quit (ASCD FS)
81 SIGILL : constant := 4; -- illegal instruction (not reset)
82 SIGTRAP : constant := 5; -- trace trap (not reset)
83 SIGIOT : constant := 6; -- IOT instruction
84 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
85 SIGEMT : constant := 7; -- EMT instruction
86 SIGFPE : constant := 8; -- floating point exception
87 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
88 SIGBUS : constant := 10; -- bus error
89 SIGSEGV : constant := 11; -- segmentation violation
90 SIGSYS : constant := 12; -- bad argument to system call
91 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
92 SIGALRM : constant := 14; -- alarm clock
93 SIGTERM : constant := 15; -- software termination signal from kill
94 SIGURG : constant := 16; -- urgent condition on IO channel
95 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
96 SIGTSTP : constant := 18; -- user stop requested from tty
97 SIGCONT : constant := 19; -- stopped process has been continued
98 SIGCHLD : constant := 20; -- child status change
99 SIGTTIN : constant := 21; -- background tty read attempted
100 SIGTTOU : constant := 22; -- background tty write attempted
101 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
102 SIGXCPU : constant := 24; -- CPU time limit exceeded
103 SIGXFSZ : constant := 25; -- filesize limit exceeded
104 SIGVTALRM : constant := 26; -- virtual timer expired
105 SIGPROF : constant := 27; -- profiling timer expired
106 SIGWINCH : constant := 28; -- window size change
107 SIGINFO : constant := 29; -- information request
108 SIGUSR1 : constant := 30; -- user defined signal 1
109 SIGUSR2 : constant := 31; -- user defined signal 2
111 SIGADAABORT : constant := SIGTERM;
112 -- Change this if you want to use another signal for task abort.
113 -- SIGTERM might be a good one.
115 type Signal_Set is array (Natural range <>) of Signal;
117 Unmasked : constant Signal_Set :=
118 (SIGTTIN, SIGTTOU, SIGSTOP, SIGTSTP);
120 Reserved : constant Signal_Set :=
123 type sigset_t is private;
125 function sigaddset (set : access sigset_t; sig : Signal) return int;
126 pragma Import (C, sigaddset, "sigaddset");
128 function sigdelset (set : access sigset_t; sig : Signal) return int;
129 pragma Import (C, sigdelset, "sigdelset");
131 function sigfillset (set : access sigset_t) return int;
132 pragma Import (C, sigfillset, "sigfillset");
134 function sigismember (set : access sigset_t; sig : Signal) return int;
135 pragma Import (C, sigismember, "sigismember");
137 function sigemptyset (set : access sigset_t) return int;
138 pragma Import (C, sigemptyset, "sigemptyset");
140 type siginfo_t is private;
141 type ucontext_t is private;
143 type Signal_Handler is access procedure
145 info : access siginfo_t;
146 context : access ucontext_t);
148 type struct_sigaction is record
149 sa_handler : System.Address;
153 pragma Convention (C, struct_sigaction);
154 type struct_sigaction_ptr is access all struct_sigaction;
156 SIG_BLOCK : constant := 1;
157 SIG_UNBLOCK : constant := 2;
158 SIG_SETMASK : constant := 3;
160 SIG_DFL : constant := 0;
161 SIG_IGN : constant := 1;
163 SA_SIGINFO : constant := 16#0040#;
167 act : struct_sigaction_ptr;
168 oact : struct_sigaction_ptr) return int;
169 pragma Import (C, sigaction, "sigaction");
175 Time_Slice_Supported : constant Boolean := True;
176 -- Indicates wether time slicing is supported
178 type timespec is private;
180 type clockid_t is private;
182 CLOCK_REALTIME : constant clockid_t;
184 function clock_gettime
185 (clock_id : clockid_t;
186 tp : access timespec) return int;
188 function To_Duration (TS : timespec) return Duration;
189 pragma Inline (To_Duration);
191 function To_Timespec (D : Duration) return timespec;
192 pragma Inline (To_Timespec);
194 type struct_timeval is private;
196 function To_Duration (TV : struct_timeval) return Duration;
197 pragma Inline (To_Duration);
199 function To_Timeval (D : Duration) return struct_timeval;
200 pragma Inline (To_Timeval);
202 -------------------------
203 -- Priority Scheduling --
204 -------------------------
206 SCHED_OTHER : constant := 1;
207 SCHED_RR : constant := 2;
208 SCHED_FIFO : constant := 4;
210 function To_Target_Priority
211 (Prio : System.Any_Priority) return Interfaces.C.int;
212 -- Maps System.Any_Priority to a POSIX priority
218 type pid_t is private;
220 function kill (pid : pid_t; sig : Signal) return int;
221 pragma Import (C, kill, "kill");
223 function getpid return pid_t;
224 pragma Import (C, getpid, "getpid");
230 function lwp_self return System.Address;
231 -- lwp_self does not exist on this thread library, revert to pthread_self
232 -- which is the closest approximation (with getpid). This function is
233 -- needed to share 7staprop.adb across POSIX-like targets.
234 pragma Import (C, lwp_self, "pthread_self");
240 type Thread_Body is access
241 function (arg : System.Address) return System.Address;
242 type pthread_t is private;
243 subtype Thread_Id is pthread_t;
245 type pthread_mutex_t is limited private;
246 type pthread_cond_t is limited private;
247 type pthread_attr_t is limited private;
248 type pthread_mutexattr_t is limited private;
249 type pthread_condattr_t is limited private;
250 type pthread_key_t is private;
252 type pthread_mutex_ptr is access all pthread_mutex_t;
253 type pthread_cond_ptr is access all pthread_cond_t;
255 PTHREAD_CREATE_DETACHED : constant := 2;
257 PTHREAD_SCOPE_PROCESS : constant := 2;
258 PTHREAD_SCOPE_SYSTEM : constant := 1;
264 Stack_Base_Available : constant Boolean := False;
265 -- Indicates wether the stack base is available on this target.
266 -- This allows us to share s-osinte.adb between all the FSU run time.
267 -- Note that this value can only be true if pthread_t has a complete
268 -- definition that corresponds exactly to the C header files.
270 function Get_Stack_Base (thread : pthread_t) return System.Address;
271 pragma Inline (Get_Stack_Base);
272 -- returns the stack base of the specified thread.
273 -- Only call this function when Stack_Base_Available is True.
275 function Get_Page_Size return size_t;
276 function Get_Page_Size return System.Address;
277 pragma Import (C, Get_Page_Size, "getpagesize");
278 -- returns the size of a page, or 0 if this is not relevant on this
281 PROT_NONE : constant := 0;
282 PROT_READ : constant := 1;
283 PROT_WRITE : constant := 2;
284 PROT_EXEC : constant := 4;
285 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
287 PROT_ON : constant := PROT_NONE;
288 PROT_OFF : constant := PROT_ALL;
290 function mprotect (addr : System.Address;
292 prot : int) return int;
293 pragma Import (C, mprotect);
295 ---------------------------------------
296 -- Nonstandard Thread Initialization --
297 ---------------------------------------
299 procedure pthread_init;
301 -------------------------
302 -- POSIX.1c Section 3 --
303 -------------------------
305 function sigwait (set : access sigset_t; sig : access Signal) return int;
306 pragma Import (C, sigwait, "sigwait");
308 function pthread_kill (thread : pthread_t; sig : Signal) return int;
309 pragma Import (C, pthread_kill, "pthread_kill");
311 function pthread_sigmask
313 set : access sigset_t;
314 oset : access sigset_t) return int;
315 pragma Import (C, pthread_sigmask, "pthread_sigmask");
317 --------------------------
318 -- POSIX.1c Section 11 --
319 --------------------------
321 function pthread_mutexattr_init
322 (attr : access pthread_mutexattr_t) return int;
323 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
325 function pthread_mutexattr_destroy
326 (attr : access pthread_mutexattr_t) return int;
327 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
329 function pthread_mutex_init
330 (mutex : access pthread_mutex_t;
331 attr : access pthread_mutexattr_t) return int;
332 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
334 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
335 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
337 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
338 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
340 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
341 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
343 function pthread_condattr_init
344 (attr : access pthread_condattr_t) return int;
345 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
347 function pthread_condattr_destroy
348 (attr : access pthread_condattr_t) return int;
349 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
351 function pthread_cond_init
352 (cond : access pthread_cond_t;
353 attr : access pthread_condattr_t) return int;
354 pragma Import (C, pthread_cond_init, "pthread_cond_init");
356 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
357 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
359 function pthread_cond_signal (cond : access pthread_cond_t) return int;
360 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
362 function pthread_cond_wait
363 (cond : access pthread_cond_t;
364 mutex : access pthread_mutex_t) return int;
365 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
367 function pthread_cond_timedwait
368 (cond : access pthread_cond_t;
369 mutex : access pthread_mutex_t;
370 abstime : access timespec) return int;
371 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
373 Relative_Timed_Wait : constant Boolean := False;
374 -- pthread_cond_timedwait requires an absolute delay time
376 --------------------------
377 -- POSIX.1c Section 13 --
378 --------------------------
380 PTHREAD_PRIO_NONE : constant := 0;
381 PTHREAD_PRIO_INHERIT : constant := 1;
382 PTHREAD_PRIO_PROTECT : constant := 2;
384 function pthread_mutexattr_setprotocol
385 (attr : access pthread_mutexattr_t;
386 protocol : int) return int;
388 (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
390 function pthread_mutexattr_setprioceiling
391 (attr : access pthread_mutexattr_t;
392 prioceiling : int) return int;
394 (C, pthread_mutexattr_setprioceiling,
395 "pthread_mutexattr_setprioceiling");
397 type padding is array (int range <>) of Interfaces.C.char;
399 type struct_sched_param is record
400 sched_priority : int; -- scheduling priority
401 opaque : padding (1 .. 4);
403 pragma Convention (C, struct_sched_param);
405 function pthread_setschedparam
408 param : access struct_sched_param) return int;
409 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
411 function pthread_attr_setscope
412 (attr : access pthread_attr_t;
413 contentionscope : int) return int;
414 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
416 function pthread_attr_setinheritsched
417 (attr : access pthread_attr_t;
418 inheritsched : int) return int;
420 (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
422 function pthread_attr_setschedpolicy
423 (attr : access pthread_attr_t;
424 policy : int) return int;
425 pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
427 function sched_yield return int;
429 ---------------------------
430 -- P1003.1c - Section 16 --
431 ---------------------------
433 function pthread_attr_init (attributes : access pthread_attr_t) return int;
434 pragma Import (C, pthread_attr_init, "pthread_attr_init");
436 function pthread_attr_destroy
437 (attributes : access pthread_attr_t) return int;
438 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
440 function pthread_attr_setdetachstate
441 (attr : access pthread_attr_t;
442 detachstate : int) return int;
444 (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
446 function pthread_attr_setstacksize
447 (attr : access pthread_attr_t;
448 stacksize : size_t) return int;
450 (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
452 function pthread_create
453 (thread : access pthread_t;
454 attributes : access pthread_attr_t;
455 start_routine : Thread_Body;
456 arg : System.Address) return int;
457 pragma Import (C, pthread_create, "pthread_create");
459 procedure pthread_exit (status : System.Address);
460 pragma Import (C, pthread_exit, "pthread_exit");
462 function pthread_self return pthread_t;
463 pragma Import (C, pthread_self, "pthread_self");
465 --------------------------
466 -- POSIX.1c Section 17 --
467 --------------------------
469 function pthread_setspecific
470 (key : pthread_key_t;
471 value : System.Address) return int;
472 pragma Import (C, pthread_setspecific, "pthread_setspecific");
474 function pthread_getspecific (key : pthread_key_t) return System.Address;
475 pragma Import (C, pthread_getspecific, "pthread_getspecific");
477 type destructor_pointer is access procedure (arg : System.Address);
479 function pthread_key_create
480 (key : access pthread_key_t;
481 destructor : destructor_pointer) return int;
482 pragma Import (C, pthread_key_create, "pthread_key_create");
486 type sigset_t is new unsigned;
488 type int32_t is new int;
490 type pid_t is new int32_t;
492 type time_t is new long;
494 type timespec is record
498 pragma Convention (C, timespec);
500 type clockid_t is new int;
501 CLOCK_REALTIME : constant clockid_t := 0;
503 type struct_timeval is record
507 pragma Convention (C, struct_timeval);
510 -- Darwin specific signal implementation
512 type Pad_Type is array (1 .. 7) of unsigned;
513 type siginfo_t is record
514 si_signo : int; -- signal number
515 si_errno : int; -- errno association
516 si_code : int; -- signal code
517 si_pid : int; -- sending process
518 si_uid : unsigned; -- sender's ruid
519 si_status : int; -- exit value
520 si_addr : System.Address; -- faulting instruction
521 si_value : System.Address; -- signal value
522 si_band : long; -- band event for SIGPOLL
523 pad : Pad_Type; -- RFU
525 pragma Convention (C, siginfo_t);
527 type stack_t is record
528 ss_sp : System.Address;
532 pragma Convention (C, stack_t);
534 type mcontext_t is new System.Address;
536 type ucontext_t is record
538 uc_sigmask : sigset_t; -- Signal Mask Used By This Context
539 uc_stack : stack_t; -- Stack Used By This Context
540 uc_link : System.Address; -- Pointer To Resuming Context
541 uc_mcsize : size_t; -- Size of The Machine Context
542 uc_mcontext : mcontext_t; -- Machine Specific Context
544 pragma Convention (C, ucontext_t);
547 -- Darwin specific pthread implementation
549 type pthread_t is new System.Address;
551 type pthread_lock_t is new long;
553 type pthread_attr_t is record
555 opaque : padding (1 .. 36);
557 pragma Convention (C, pthread_attr_t);
559 type pthread_mutexattr_t is record
561 opaque : padding (1 .. 8);
563 pragma Convention (C, pthread_mutexattr_t);
565 type pthread_mutex_t is record
567 opaque : padding (1 .. 40);
569 pragma Convention (C, pthread_mutex_t);
571 type pthread_condattr_t is record
573 opaque : padding (1 .. 4);
575 pragma Convention (C, pthread_condattr_t);
577 type pthread_cond_t is record
579 opaque : padding (1 .. 24);
581 pragma Convention (C, pthread_cond_t);
583 type pthread_once_t is record
585 opaque : padding (1 .. 4);
587 pragma Convention (C, pthread_once_t);
589 type pthread_key_t is new unsigned_long;
591 end System.OS_Interface;