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 --
9 -- Copyright (C) 1992-2003 Free Software Foundation, Inc. --
11 -- GNARL is free software; you can redistribute it and/or modify it under --
12 -- terms of the GNU General Public License as published by the Free Soft- --
13 -- ware Foundation; either version 2, or (at your option) any later ver- --
14 -- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
15 -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
16 -- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
17 -- for more details. You should have received a copy of the GNU General --
18 -- Public License distributed with GNARL; see file COPYING. If not, write --
19 -- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
20 -- MA 02111-1307, USA. --
22 -- As a special exception, if other files instantiate generics from this --
23 -- unit, or you link this unit with other files to produce an executable, --
24 -- this unit does not by itself cause the resulting executable to be --
25 -- covered by the GNU General Public License. This exception does not --
26 -- however invalidate any other reasons why the executable file might be --
27 -- covered by the GNU Public License. --
29 -- GNARL was developed by the GNARL team at Florida State University. --
30 -- Extensive contributions were provided by Ada Core Technologies, Inc. --
32 ------------------------------------------------------------------------------
34 -- This is a GNU/Linux (GNU/LinuxThreads) version of this package.
36 -- This package encapsulates all direct interfaces to OS services
37 -- that are needed by children of System.
39 -- PLEASE DO NOT add any with-clauses to this package
40 -- or remove the pragma Elaborate_Body.
41 -- It is designed to be a bottom-level (leaf) package.
44 package System
.OS_Interface
is
47 pragma Linker_Options
("-lpthread");
49 subtype int
is Interfaces
.C
.int
;
50 subtype char
is Interfaces
.C
.char
;
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 EPERM
: constant := 1;
72 ETIMEDOUT
: constant := 110;
78 Max_Interrupt
: constant := 63;
79 type Signal
is new int
range 0 .. Max_Interrupt
;
80 for Signal
'Size use int
'Size;
82 SIGHUP
: constant := 1; -- hangup
83 SIGINT
: constant := 2; -- interrupt (rubout)
84 SIGQUIT
: constant := 3; -- quit (ASCD FS)
85 SIGILL
: constant := 4; -- illegal instruction (not reset)
86 SIGTRAP
: constant := 5; -- trace trap (not reset)
87 SIGIOT
: constant := 6; -- IOT instruction
88 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
89 SIGFPE
: constant := 8; -- floating point exception
90 SIGKILL
: constant := 9; -- kill (cannot be caught or ignored)
91 SIGBUS
: constant := 7; -- bus error
92 SIGSEGV
: constant := 11; -- segmentation violation
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 SIGUSR1
: constant := 10; -- user defined signal 1
97 SIGUSR2
: constant := 12; -- user defined signal 2
98 SIGCLD
: constant := 17; -- alias for SIGCHLD
99 SIGCHLD
: constant := 17; -- child status change
100 SIGPWR
: constant := 30; -- power-fail restart
101 SIGWINCH
: constant := 28; -- window size change
102 SIGURG
: constant := 23; -- urgent condition on IO channel
103 SIGPOLL
: constant := 29; -- pollable event occurred
104 SIGIO
: constant := 29; -- I/O now possible (4.2 BSD)
105 SIGLOST
: constant := 29; -- File lock lost
106 SIGSTOP
: constant := 19; -- stop (cannot be caught or ignored)
107 SIGTSTP
: constant := 20; -- user stop requested from tty
108 SIGCONT
: constant := 18; -- stopped process has been continued
109 SIGTTIN
: constant := 21; -- background tty read attempted
110 SIGTTOU
: constant := 22; -- background tty write attempted
111 SIGVTALRM
: constant := 26; -- virtual timer expired
112 SIGPROF
: constant := 27; -- profiling timer expired
113 SIGXCPU
: constant := 24; -- CPU time limit exceeded
114 SIGXFSZ
: constant := 25; -- filesize limit exceeded
115 SIGUNUSED
: constant := 31; -- unused signal (GNU/Linux)
116 SIGSTKFLT
: constant := 16; -- coprocessor stack fault (Linux)
117 SIGLTHRRES
: constant := 32; -- GNU/LinuxThreads restart signal
118 SIGLTHRCAN
: constant := 33; -- GNU/LinuxThreads cancel signal
119 SIGLTHRDBG
: constant := 34; -- GNU/LinuxThreads debugger signal
121 SIGADAABORT
: constant := SIGABRT
;
122 -- Change this if you want to use another signal for task abort.
123 -- SIGTERM might be a good one.
125 type Signal_Set
is array (Natural range <>) of Signal
;
127 Unmasked
: constant Signal_Set
:= (
129 -- To enable debugging on multithreaded applications, mark SIGTRAP to
134 SIGTTIN
, SIGTTOU
, SIGTSTP
,
135 -- Keep these three signals unmasked so that background processes
136 -- and IO behaves as normal "C" applications
139 -- To avoid confusing the profiler
142 -- These two signals actually cannot be masked;
143 -- POSIX simply won't allow it.
145 SIGLTHRRES
, SIGLTHRCAN
, SIGLTHRDBG
);
146 -- These three signals are used by GNU/LinuxThreads starting from
147 -- glibc 2.1 (future 2.2).
149 Reserved
: constant Signal_Set
:=
150 -- I am not sure why the following two signals are reserved.
151 -- I guess they are not supported by this version of GNU/Linux.
152 (SIGVTALRM
, SIGUNUSED
);
154 type sigset_t
is private;
156 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
157 pragma Import
(C
, sigaddset
, "sigaddset");
159 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
160 pragma Import
(C
, sigdelset
, "sigdelset");
162 function sigfillset
(set
: access sigset_t
) return int
;
163 pragma Import
(C
, sigfillset
, "sigfillset");
165 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
166 pragma Import
(C
, sigismember
, "sigismember");
168 function sigemptyset
(set
: access sigset_t
) return int
;
169 pragma Import
(C
, sigemptyset
, "sigemptyset");
171 type union_type_3
is new String (1 .. 116);
172 type siginfo_t
is record
176 X_data
: union_type_3
;
178 pragma Convention
(C
, siginfo_t
);
180 type struct_sigaction
is record
181 sa_handler
: System
.Address
;
183 sa_flags
: unsigned_long
;
184 sa_restorer
: System
.Address
;
186 pragma Convention
(C
, struct_sigaction
);
187 type struct_sigaction_ptr
is access all struct_sigaction
;
189 type Machine_State
is record
197 type Machine_State_Ptr
is access all Machine_State
;
199 SIG_BLOCK
: constant := 0;
200 SIG_UNBLOCK
: constant := 1;
201 SIG_SETMASK
: constant := 2;
203 SIG_DFL
: constant := 0;
204 SIG_IGN
: constant := 1;
208 act
: struct_sigaction_ptr
;
209 oact
: struct_sigaction_ptr
) return int
;
210 pragma Import
(C
, sigaction
, "sigaction");
216 type timespec
is private;
218 function To_Duration
(TS
: timespec
) return Duration;
219 pragma Inline
(To_Duration
);
221 function To_Timespec
(D
: Duration) return timespec
;
222 pragma Inline
(To_Timespec
);
224 type struct_timeval
is private;
226 function To_Duration
(TV
: struct_timeval
) return Duration;
227 pragma Inline
(To_Duration
);
229 function To_Timeval
(D
: Duration) return struct_timeval
;
230 pragma Inline
(To_Timeval
);
232 function gettimeofday
233 (tv
: access struct_timeval
;
234 tz
: System
.Address
:= System
.Null_Address
) return int
;
235 pragma Import
(C
, gettimeofday
, "gettimeofday");
237 function sysconf
(name
: int
) return long
;
238 pragma Import
(C
, sysconf
);
240 SC_CLK_TCK
: constant := 2;
242 -------------------------
243 -- Priority Scheduling --
244 -------------------------
246 SCHED_OTHER
: constant := 0;
247 SCHED_FIFO
: constant := 1;
248 SCHED_RR
: constant := 2;
254 type pid_t
is private;
256 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
257 pragma Import
(C
, kill
, "kill");
259 function getpid
return pid_t
;
260 pragma Import
(C
, getpid
, "getpid");
266 type Thread_Body
is access
267 function (arg
: System
.Address
) return System
.Address
;
268 type pthread_t
is private;
269 subtype Thread_Id
is pthread_t
;
271 type pthread_mutex_t
is limited private;
272 type pthread_cond_t
is limited private;
273 type pthread_attr_t
is limited private;
274 type pthread_mutexattr_t
is limited private;
275 type pthread_condattr_t
is limited private;
276 type pthread_key_t
is private;
278 PTHREAD_CREATE_DETACHED
: constant := 1;
284 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
285 pragma Inline
(Get_Stack_Base
);
286 -- This is a dummy procedure to share some GNULLI files
288 ---------------------------------------
289 -- Nonstandard Thread Initialization --
290 ---------------------------------------
292 procedure pthread_init
;
293 pragma Inline
(pthread_init
);
294 -- This is a dummy procedure to share some GNULLI files
296 -------------------------
297 -- POSIX.1c Section 3 --
298 -------------------------
300 function sigwait
(set
: access sigset_t
; sig
: access Signal
) return int
;
301 pragma Import
(C
, sigwait
, "sigwait");
303 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
304 pragma Import
(C
, pthread_kill
, "pthread_kill");
306 type sigset_t_ptr
is access all sigset_t
;
308 function pthread_sigmask
311 oset
: sigset_t_ptr
) return int
;
312 pragma Import
(C
, pthread_sigmask
, "pthread_sigmask");
314 --------------------------
315 -- POSIX.1c Section 11 --
316 --------------------------
318 function pthread_mutexattr_init
319 (attr
: access pthread_mutexattr_t
) return int
;
320 pragma Import
(C
, pthread_mutexattr_init
, "pthread_mutexattr_init");
322 function pthread_mutexattr_destroy
323 (attr
: access pthread_mutexattr_t
) return int
;
324 pragma Import
(C
, pthread_mutexattr_destroy
, "pthread_mutexattr_destroy");
326 function pthread_mutex_init
327 (mutex
: access pthread_mutex_t
;
328 attr
: access pthread_mutexattr_t
) return int
;
329 pragma Import
(C
, pthread_mutex_init
, "pthread_mutex_init");
331 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
332 pragma Import
(C
, pthread_mutex_destroy
, "pthread_mutex_destroy");
334 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
335 pragma Import
(C
, pthread_mutex_lock
, "pthread_mutex_lock");
337 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
338 pragma Import
(C
, pthread_mutex_unlock
, "pthread_mutex_unlock");
340 function pthread_condattr_init
341 (attr
: access pthread_condattr_t
) return int
;
342 pragma Import
(C
, pthread_condattr_init
, "pthread_condattr_init");
344 function pthread_condattr_destroy
345 (attr
: access pthread_condattr_t
) return int
;
346 pragma Import
(C
, pthread_condattr_destroy
, "pthread_condattr_destroy");
348 function pthread_cond_init
349 (cond
: access pthread_cond_t
;
350 attr
: access pthread_condattr_t
) return int
;
351 pragma Import
(C
, pthread_cond_init
, "pthread_cond_init");
353 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
354 pragma Import
(C
, pthread_cond_destroy
, "pthread_cond_destroy");
356 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
357 pragma Import
(C
, pthread_cond_signal
, "pthread_cond_signal");
359 function pthread_cond_wait
360 (cond
: access pthread_cond_t
;
361 mutex
: access pthread_mutex_t
) return int
;
362 pragma Import
(C
, pthread_cond_wait
, "pthread_cond_wait");
364 function pthread_cond_timedwait
365 (cond
: access pthread_cond_t
;
366 mutex
: access pthread_mutex_t
;
367 abstime
: access timespec
) return int
;
368 pragma Import
(C
, pthread_cond_timedwait
, "pthread_cond_timedwait");
370 --------------------------
371 -- POSIX.1c Section 13 --
372 --------------------------
374 type struct_sched_param
is record
375 sched_priority
: int
; -- scheduling priority
377 pragma Convention
(C
, struct_sched_param
);
379 function pthread_setschedparam
382 param
: access struct_sched_param
) return int
;
383 pragma Import
(C
, pthread_setschedparam
, "pthread_setschedparam");
385 function pthread_attr_setschedpolicy
386 (attr
: access pthread_attr_t
;
387 policy
: int
) return int
;
389 (C
, pthread_attr_setschedpolicy
, "pthread_attr_setschedpolicy");
391 function sched_yield
return int
;
392 pragma Import
(C
, sched_yield
, "sched_yield");
394 ---------------------------
395 -- P1003.1c - Section 16 --
396 ---------------------------
398 function pthread_attr_init
399 (attributes
: access pthread_attr_t
) return int
;
400 pragma Import
(C
, pthread_attr_init
, "pthread_attr_init");
402 function pthread_attr_destroy
403 (attributes
: access pthread_attr_t
) return int
;
404 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_destroy");
406 function pthread_attr_setdetachstate
407 (attr
: access pthread_attr_t
;
408 detachstate
: int
) return int
;
410 (C
, pthread_attr_setdetachstate
, "pthread_attr_setdetachstate");
412 function pthread_attr_setstacksize
413 (attr
: access pthread_attr_t
;
414 stacksize
: size_t
) return int
;
415 pragma Import
(C
, pthread_attr_setstacksize
, "pthread_attr_setstacksize");
417 function pthread_create
418 (thread
: access pthread_t
;
419 attributes
: access pthread_attr_t
;
420 start_routine
: Thread_Body
;
421 arg
: System
.Address
) return int
;
422 pragma Import
(C
, pthread_create
, "pthread_create");
424 procedure pthread_exit
(status
: System
.Address
);
425 pragma Import
(C
, pthread_exit
, "pthread_exit");
427 function pthread_self
return pthread_t
;
428 pragma Import
(C
, pthread_self
, "pthread_self");
430 --------------------------
431 -- POSIX.1c Section 17 --
432 --------------------------
434 function pthread_setspecific
435 (key
: pthread_key_t
;
436 value
: System
.Address
) return int
;
437 pragma Import
(C
, pthread_setspecific
, "pthread_setspecific");
439 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
440 pragma Import
(C
, pthread_getspecific
, "pthread_getspecific");
442 type destructor_pointer
is access procedure (arg
: System
.Address
);
444 function pthread_key_create
445 (key
: access pthread_key_t
;
446 destructor
: destructor_pointer
) return int
;
447 pragma Import
(C
, pthread_key_create
, "pthread_key_create");
451 type sigset_t
is array (0 .. 127) of unsigned_char
;
452 pragma Convention
(C
, sigset_t
);
454 type pid_t
is new int
;
456 type time_t
is new long
;
458 type timespec
is record
462 pragma Convention
(C
, timespec
);
464 type struct_timeval
is record
468 pragma Convention
(C
, struct_timeval
);
470 type pthread_attr_t
is record
473 schedparam
: struct_sched_param
;
478 stackaddr
: System
.Address
;
481 pragma Convention
(C
, pthread_attr_t
);
483 type pthread_condattr_t
is record
486 pragma Convention
(C
, pthread_condattr_t
);
488 type pthread_mutexattr_t
is record
491 pragma Convention
(C
, pthread_mutexattr_t
);
493 type pthread_t
is new unsigned_long
;
495 type struct_pthread_fast_lock
is record
499 pragma Convention
(C
, struct_pthread_fast_lock
);
501 type pthread_mutex_t
is record
504 m_owner
: System
.Address
;
506 m_lock
: struct_pthread_fast_lock
;
508 pragma Convention
(C
, pthread_mutex_t
);
510 type pthread_cond_t
is array (0 .. 47) of unsigned_char
;
511 pragma Convention
(C
, pthread_cond_t
);
513 type pthread_key_t
is new unsigned
;
515 end System
.OS_Interface
;