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) 1995-2008, 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 the tasking run-time (libgnarl).
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 with System.OS_Constants;
46 package System.OS_Interface is
49 subtype int is Interfaces.C.int;
50 subtype short is Interfaces.C.short;
51 subtype long is Interfaces.C.long;
52 subtype unsigned is Interfaces.C.unsigned;
53 subtype unsigned_short is Interfaces.C.unsigned_short;
54 subtype unsigned_long is Interfaces.C.unsigned_long;
55 subtype unsigned_char is Interfaces.C.unsigned_char;
56 subtype plain_char is Interfaces.C.plain_char;
57 subtype size_t is Interfaces.C.size_t;
63 function errno return int;
64 pragma Import (C, errno, "__get_errno");
66 EINTR : constant := 4;
67 ENOMEM : constant := 12;
68 EINVAL : constant := 22;
69 EAGAIN : constant := 35;
70 ETIMEDOUT : constant := 60;
76 Max_Interrupt : constant := 31;
77 type Signal is new int range 0 .. Max_Interrupt;
78 for Signal'Size use int'Size;
80 SIGHUP : constant := 1; -- hangup
81 SIGINT : constant := 2; -- interrupt (rubout)
82 SIGQUIT : constant := 3; -- quit (ASCD FS)
83 SIGILL : constant := 4; -- illegal instruction (not reset)
84 SIGTRAP : constant := 5; -- trace trap (not reset)
85 SIGIOT : constant := 6; -- IOT instruction
86 SIGABRT : constant := 6; -- used by abort, replace SIGIOT in the future
87 SIGEMT : constant := 7; -- EMT instruction
88 SIGFPE : constant := 8; -- floating point exception
89 SIGKILL : constant := 9; -- kill (cannot be caught or ignored)
90 SIGBUS : constant := 10; -- bus error
91 SIGSEGV : constant := 11; -- segmentation violation
92 SIGSYS : constant := 12; -- bad argument to system call
93 SIGPIPE : constant := 13; -- write on a pipe with no one to read it
94 SIGALRM : constant := 14; -- alarm clock
95 SIGTERM : constant := 15; -- software termination signal from kill
96 SIGURG : constant := 16; -- urgent condition on IO channel
97 SIGSTOP : constant := 17; -- stop (cannot be caught or ignored)
98 SIGTSTP : constant := 18; -- user stop requested from tty
99 SIGCONT : constant := 19; -- stopped process has been continued
100 SIGCHLD : constant := 20; -- child status change
101 SIGTTIN : constant := 21; -- background tty read attempted
102 SIGTTOU : constant := 22; -- background tty write attempted
103 SIGIO : constant := 23; -- I/O possible (Solaris SIGPOLL alias)
104 SIGXCPU : constant := 24; -- CPU time limit exceeded
105 SIGXFSZ : constant := 25; -- filesize limit exceeded
106 SIGVTALRM : constant := 26; -- virtual timer expired
107 SIGPROF : constant := 27; -- profiling timer expired
108 SIGWINCH : constant := 28; -- window size change
109 SIGINFO : constant := 29; -- information request
110 SIGUSR1 : constant := 30; -- user defined signal 1
111 SIGUSR2 : constant := 31; -- user defined signal 2
113 SIGADAABORT : constant := SIGTERM;
114 -- Change this if you want to use another signal for task abort.
115 -- SIGTERM might be a good one.
117 type Signal_Set is array (Natural range <>) of Signal;
119 Unmasked : constant Signal_Set :=
120 (SIGTTIN, SIGTTOU, SIGSTOP, SIGTSTP);
122 Reserved : constant Signal_Set :=
125 type sigset_t is private;
127 function sigaddset (set : access sigset_t; sig : Signal) return int;
128 pragma Import (C, sigaddset, "sigaddset");
130 function sigdelset (set : access sigset_t; sig : Signal) return int;
131 pragma Import (C, sigdelset, "sigdelset");
133 function sigfillset (set : access sigset_t) return int;
134 pragma Import (C, sigfillset, "sigfillset");
136 function sigismember (set : access sigset_t; sig : Signal) return int;
137 pragma Import (C, sigismember, "sigismember");
139 function sigemptyset (set : access sigset_t) return int;
140 pragma Import (C, sigemptyset, "sigemptyset");
142 type siginfo_t is private;
143 type ucontext_t is private;
145 type Signal_Handler is access procedure
147 info : access siginfo_t;
148 context : access ucontext_t);
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 SIG_BLOCK : constant := 1;
159 SIG_UNBLOCK : constant := 2;
160 SIG_SETMASK : constant := 3;
162 SIG_DFL : constant := 0;
163 SIG_IGN : constant := 1;
165 SA_SIGINFO : constant := 16#0040#;
166 SA_ONSTACK : constant := 16#0001#;
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;
191 function To_Duration (TS : timespec) return Duration;
192 pragma Inline (To_Duration);
194 function To_Timespec (D : Duration) return timespec;
195 pragma Inline (To_Timespec);
197 type struct_timeval is private;
199 function To_Duration (TV : struct_timeval) return Duration;
200 pragma Inline (To_Duration);
202 function To_Timeval (D : Duration) return struct_timeval;
203 pragma Inline (To_Timeval);
205 -------------------------
206 -- Priority Scheduling --
207 -------------------------
209 SCHED_OTHER : constant := 1;
210 SCHED_RR : constant := 2;
211 SCHED_FIFO : constant := 4;
213 function To_Target_Priority
214 (Prio : System.Any_Priority) return Interfaces.C.int;
215 -- Maps System.Any_Priority to a POSIX priority
221 type pid_t is private;
223 function kill (pid : pid_t; sig : Signal) return int;
224 pragma Import (C, kill, "kill");
226 function getpid return pid_t;
227 pragma Import (C, getpid, "getpid");
233 function lwp_self return System.Address;
234 pragma Import (C, lwp_self, "pthread_self");
235 -- lwp_self does not exist on this thread library, revert to pthread_self
236 -- which is the closest approximation (with getpid). This function is
237 -- needed to share 7staprop.adb across POSIX-like targets.
243 type Thread_Body is access
244 function (arg : System.Address) return System.Address;
245 pragma Convention (C, Thread_Body);
247 type pthread_t is private;
248 subtype Thread_Id is pthread_t;
250 type pthread_mutex_t is limited private;
251 type pthread_cond_t is limited private;
252 type pthread_attr_t is limited private;
253 type pthread_mutexattr_t is limited private;
254 type pthread_condattr_t is limited private;
255 type pthread_key_t is private;
257 type pthread_mutex_ptr is access all pthread_mutex_t;
258 type pthread_cond_ptr is access all pthread_cond_t;
260 PTHREAD_CREATE_DETACHED : constant := 2;
262 PTHREAD_SCOPE_PROCESS : constant := 2;
263 PTHREAD_SCOPE_SYSTEM : constant := 1;
269 type stack_t is record
270 ss_sp : System.Address;
274 pragma Convention (C, stack_t);
277 (ss : not null access stack_t;
278 oss : access stack_t) return int;
279 pragma Import (C, sigaltstack, "sigaltstack");
281 Alternate_Stack : aliased System.Address;
282 pragma Import (C, Alternate_Stack, "__gnat_alternate_stack");
283 -- The alternate signal stack for stack overflows
285 Alternate_Stack_Size : constant := 64 * 1024;
286 -- This must be in keeping with init.c:__gnat_alternate_stack
288 Stack_Base_Available : constant Boolean := False;
289 -- Indicates whether the stack base is available on this target. This
290 -- allows us to share s-osinte.adb between all the FSU run time. Note that
291 -- this value can only be true if pthread_t has a complete definition that
292 -- corresponds exactly to the C header files.
294 function Get_Stack_Base (thread : pthread_t) return System.Address;
295 pragma Inline (Get_Stack_Base);
296 -- returns the stack base of the specified thread. Only call this function
297 -- when Stack_Base_Available is True.
299 function Get_Page_Size return size_t;
300 function Get_Page_Size return System.Address;
301 pragma Import (C, Get_Page_Size, "getpagesize");
302 -- Returns the size of a page, or 0 if this is not relevant on this target
304 PROT_NONE : constant := 0;
305 PROT_READ : constant := 1;
306 PROT_WRITE : constant := 2;
307 PROT_EXEC : constant := 4;
308 PROT_ALL : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
310 PROT_ON : constant := PROT_NONE;
311 PROT_OFF : constant := PROT_ALL;
314 (addr : System.Address;
316 prot : int) return int;
317 pragma Import (C, mprotect);
319 ---------------------------------------
320 -- Nonstandard Thread Initialization --
321 ---------------------------------------
323 procedure pthread_init;
325 -------------------------
326 -- POSIX.1c Section 3 --
327 -------------------------
329 function sigwait (set : access sigset_t; sig : access Signal) return int;
330 pragma Import (C, sigwait, "sigwait");
332 function pthread_kill (thread : pthread_t; sig : Signal) return int;
333 pragma Import (C, pthread_kill, "pthread_kill");
335 function pthread_sigmask
337 set : access sigset_t;
338 oset : access sigset_t) return int;
339 pragma Import (C, pthread_sigmask, "pthread_sigmask");
341 --------------------------
342 -- POSIX.1c Section 11 --
343 --------------------------
345 function pthread_mutexattr_init
346 (attr : access pthread_mutexattr_t) return int;
347 pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
349 function pthread_mutexattr_destroy
350 (attr : access pthread_mutexattr_t) return int;
351 pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
353 function pthread_mutex_init
354 (mutex : access pthread_mutex_t;
355 attr : access pthread_mutexattr_t) return int;
356 pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
358 function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
359 pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
361 function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
362 pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
364 function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
365 pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
367 function pthread_condattr_init
368 (attr : access pthread_condattr_t) return int;
369 pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
371 function pthread_condattr_destroy
372 (attr : access pthread_condattr_t) return int;
373 pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
375 function pthread_cond_init
376 (cond : access pthread_cond_t;
377 attr : access pthread_condattr_t) return int;
378 pragma Import (C, pthread_cond_init, "pthread_cond_init");
380 function pthread_cond_destroy (cond : access pthread_cond_t) return int;
381 pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
383 function pthread_cond_signal (cond : access pthread_cond_t) return int;
384 pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
386 function pthread_cond_wait
387 (cond : access pthread_cond_t;
388 mutex : access pthread_mutex_t) return int;
389 pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
391 function pthread_cond_timedwait
392 (cond : access pthread_cond_t;
393 mutex : access pthread_mutex_t;
394 abstime : access timespec) return int;
395 pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
397 Relative_Timed_Wait : constant Boolean := False;
398 -- pthread_cond_timedwait requires an absolute delay time
400 --------------------------
401 -- POSIX.1c Section 13 --
402 --------------------------
404 PTHREAD_PRIO_NONE : constant := 0;
405 PTHREAD_PRIO_INHERIT : constant := 1;
406 PTHREAD_PRIO_PROTECT : constant := 2;
408 function pthread_mutexattr_setprotocol
409 (attr : access pthread_mutexattr_t;
410 protocol : int) return int;
412 (C, pthread_mutexattr_setprotocol, "pthread_mutexattr_setprotocol");
414 function pthread_mutexattr_setprioceiling
415 (attr : access pthread_mutexattr_t;
416 prioceiling : int) return int;
418 (C, pthread_mutexattr_setprioceiling,
419 "pthread_mutexattr_setprioceiling");
421 type padding is array (int range <>) of Interfaces.C.char;
423 type struct_sched_param is record
424 sched_priority : int; -- scheduling priority
425 opaque : padding (1 .. 4);
427 pragma Convention (C, struct_sched_param);
429 function pthread_setschedparam
432 param : access struct_sched_param) return int;
433 pragma Import (C, pthread_setschedparam, "pthread_setschedparam");
435 function pthread_attr_setscope
436 (attr : access pthread_attr_t;
437 contentionscope : int) return int;
438 pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
440 function pthread_attr_setinheritsched
441 (attr : access pthread_attr_t;
442 inheritsched : int) return int;
444 (C, pthread_attr_setinheritsched, "pthread_attr_setinheritsched");
446 function pthread_attr_setschedpolicy
447 (attr : access pthread_attr_t;
448 policy : int) return int;
449 pragma Import (C, pthread_attr_setschedpolicy, "pthread_attr_setsched");
451 function sched_yield return int;
453 ---------------------------
454 -- P1003.1c - Section 16 --
455 ---------------------------
457 function pthread_attr_init (attributes : access pthread_attr_t) return int;
458 pragma Import (C, pthread_attr_init, "pthread_attr_init");
460 function pthread_attr_destroy
461 (attributes : access pthread_attr_t) return int;
462 pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
464 function pthread_attr_setdetachstate
465 (attr : access pthread_attr_t;
466 detachstate : int) return int;
468 (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
470 function pthread_attr_setstacksize
471 (attr : access pthread_attr_t;
472 stacksize : size_t) return int;
474 (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
476 function pthread_create
477 (thread : access pthread_t;
478 attributes : access pthread_attr_t;
479 start_routine : Thread_Body;
480 arg : System.Address) return int;
481 pragma Import (C, pthread_create, "pthread_create");
483 procedure pthread_exit (status : System.Address);
484 pragma Import (C, pthread_exit, "pthread_exit");
486 function pthread_self return pthread_t;
487 pragma Import (C, pthread_self, "pthread_self");
489 --------------------------
490 -- POSIX.1c Section 17 --
491 --------------------------
493 function pthread_setspecific
494 (key : pthread_key_t;
495 value : System.Address) return int;
496 pragma Import (C, pthread_setspecific, "pthread_setspecific");
498 function pthread_getspecific (key : pthread_key_t) return System.Address;
499 pragma Import (C, pthread_getspecific, "pthread_getspecific");
501 type destructor_pointer is access procedure (arg : System.Address);
502 pragma Convention (C, destructor_pointer);
504 function pthread_key_create
505 (key : access pthread_key_t;
506 destructor : destructor_pointer) return int;
507 pragma Import (C, pthread_key_create, "pthread_key_create");
511 type sigset_t is new unsigned;
513 type int32_t is new int;
515 type pid_t is new int32_t;
517 type time_t is new long;
519 type timespec is record
523 pragma Convention (C, timespec);
525 type clockid_t is new int;
526 CLOCK_REALTIME : constant clockid_t := 0;
528 type struct_timeval is record
532 pragma Convention (C, struct_timeval);
535 -- Darwin specific signal implementation
537 type Pad_Type is array (1 .. 7) of unsigned_long;
538 type siginfo_t is record
539 si_signo : int; -- signal number
540 si_errno : int; -- errno association
541 si_code : int; -- signal code
542 si_pid : int; -- sending process
543 si_uid : unsigned; -- sender's ruid
544 si_status : int; -- exit value
545 si_addr : System.Address; -- faulting instruction
546 si_value : System.Address; -- signal value
547 si_band : long; -- band event for SIGPOLL
548 pad : Pad_Type; -- RFU
550 pragma Convention (C, siginfo_t);
552 type mcontext_t is new System.Address;
554 type ucontext_t is record
556 uc_sigmask : sigset_t; -- Signal Mask Used By This Context
557 uc_stack : stack_t; -- Stack Used By This Context
558 uc_link : System.Address; -- Pointer To Resuming Context
559 uc_mcsize : size_t; -- Size of The Machine Context
560 uc_mcontext : mcontext_t; -- Machine Specific Context
562 pragma Convention (C, ucontext_t);
565 -- Darwin specific pthread implementation
567 type pthread_t is new System.Address;
569 type pthread_attr_t is record
571 opaque : padding (1 .. System.OS_Constants.PTHREAD_ATTR_SIZE);
573 pragma Convention (C, pthread_attr_t);
575 type pthread_mutexattr_t is record
577 opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEXATTR_SIZE);
579 pragma Convention (C, pthread_mutexattr_t);
581 type pthread_mutex_t is record
583 opaque : padding (1 .. System.OS_Constants.PTHREAD_MUTEX_SIZE);
585 pragma Convention (C, pthread_mutex_t);
587 type pthread_condattr_t is record
589 opaque : padding (1 .. System.OS_Constants.PTHREAD_CONDATTR_SIZE);
591 pragma Convention (C, pthread_condattr_t);
593 type pthread_cond_t is record
595 opaque : padding (1 .. System.OS_Constants.PTHREAD_COND_SIZE);
597 pragma Convention (C, pthread_cond_t);
599 type pthread_once_t is record
601 opaque : padding (1 .. System.OS_Constants.PTHREAD_ONCE_SIZE);
603 pragma Convention (C, pthread_once_t);
605 type pthread_key_t is new unsigned_long;
607 end System.OS_Interface;