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) 1991-1994, Florida State University --
10 -- Copyright (C) 1995-2006, 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 a GNU/Linux (GNU/LinuxThreads) version of this package
37 -- This package encapsulates all direct interfaces to OS services
38 -- that are needed by children of System.
40 -- PLEASE DO NOT add any with-clauses to this package or remove the pragma
41 -- Preelaborate. This package is designed to be a bottom-level (leaf) package.
44 with Unchecked_Conversion
;
46 package System
.OS_Interface
is
49 pragma Linker_Options
("-lpthread");
51 subtype int
is Interfaces
.C
.int
;
52 subtype char
is Interfaces
.C
.char
;
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 := 35;
70 EINTR
: constant := 4;
71 EINVAL
: constant := 22;
72 ENOMEM
: constant := 12;
73 EPERM
: constant := 1;
74 ETIMEDOUT
: constant := 60;
80 Max_Interrupt
: constant := 63;
81 type Signal
is new int
range 0 .. Max_Interrupt
;
82 for Signal
'Size use int
'Size;
84 SIGHUP
: constant := 1; -- hangup
85 SIGINT
: constant := 2; -- interrupt (rubout)
86 SIGQUIT
: constant := 3; -- quit (ASCD FS)
87 SIGILL
: constant := 4; -- illegal instruction (not reset)
88 SIGTRAP
: constant := 5; -- trace trap (not reset)
89 SIGIOT
: constant := 6; -- IOT instruction
90 SIGABRT
: constant := 6; -- used by abort, replace SIGIOT in the future
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 SIGPIPE
: constant := 13; -- write on a pipe with no one to read it
96 SIGALRM
: constant := 14; -- alarm clock
97 SIGTERM
: constant := 15; -- software termination signal from kill
98 SIGURG
: constant := 16; -- urgent condition on IO channel
99 SIGSTOP
: constant := 17; -- stop (cannot be caught or ignored)
100 SIGTSTP
: constant := 18; -- user stop requested from tty
101 SIGCONT
: constant := 19; -- stopped process has been continued
102 SIGCLD
: constant := 20; -- alias for SIGCHLD
103 SIGCHLD
: constant := 20; -- child status change
104 SIGTTIN
: constant := 21; -- background tty read attempted
105 SIGTTOU
: constant := 22; -- background tty write attempted
106 SIGIO
: constant := 23; -- I/O now possible (4.2 BSD)
107 SIGPOLL
: constant := 23; -- pollable event occurred
108 SIGXCPU
: constant := 24; -- CPU time limit exceeded
109 SIGXFSZ
: constant := 25; -- filesize limit exceeded
110 SIGVTALRM
: constant := 26; -- virtual timer expired
111 SIGPROF
: constant := 27; -- profiling timer expired
112 SIGWINCH
: constant := 28; -- window size change
113 SIGPWR
: constant := 29; -- power-fail restart
114 SIGUSR1
: constant := 30; -- user defined signal 1
115 SIGUSR2
: constant := 31; -- user defined signal 2
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 SIGUNUSED
: constant := 0;
126 SIGSTKFLT
: constant := 0;
127 SIGLOST
: constant := 0;
128 -- These don't exist for Linux/Alpha. The constants are present
129 -- so that we can continue to use a-intnam-linux.ads.
131 type Signal_Set
is array (Natural range <>) of Signal
;
133 Unmasked
: constant Signal_Set
:= (
135 -- To enable debugging on multithreaded applications, mark SIGTRAP to
140 SIGTTIN
, SIGTTOU
, SIGTSTP
,
141 -- Keep these three signals unmasked so that background processes
142 -- and IO behaves as normal "C" applications
145 -- To avoid confusing the profiler
148 -- These two signals actually cannot be masked;
149 -- POSIX simply won't allow it.
151 SIGLTHRRES
, SIGLTHRCAN
, SIGLTHRDBG
);
152 -- These three signals are used by GNU/LinuxThreads starting from
153 -- glibc 2.1 (future 2.2).
155 Reserved
: constant Signal_Set
:= (SIGKILL
, SIGSTOP
);
157 type sigset_t
is private;
159 function sigaddset
(set
: access sigset_t
; sig
: Signal
) return int
;
160 pragma Import
(C
, sigaddset
, "sigaddset");
162 function sigdelset
(set
: access sigset_t
; sig
: Signal
) return int
;
163 pragma Import
(C
, sigdelset
, "sigdelset");
165 function sigfillset
(set
: access sigset_t
) return int
;
166 pragma Import
(C
, sigfillset
, "sigfillset");
168 function sigismember
(set
: access sigset_t
; sig
: Signal
) return int
;
169 pragma Import
(C
, sigismember
, "sigismember");
171 function sigemptyset
(set
: access sigset_t
) return int
;
172 pragma Import
(C
, sigemptyset
, "sigemptyset");
174 type union_type_3
is new String (1 .. 116);
175 type siginfo_t
is record
179 X_data
: union_type_3
;
181 pragma Convention
(C
, siginfo_t
);
183 type struct_sigaction
is record
184 sa_handler
: System
.Address
;
186 sa_flags
: unsigned_long
;
188 pragma Convention
(C
, struct_sigaction
);
189 type struct_sigaction_ptr
is access all struct_sigaction
;
191 type Machine_State
is record
192 dummy
: unsigned_long
;
194 type Machine_State_Ptr
is access all Machine_State
;
196 SA_SIGINFO
: constant := 16#
40#
;
198 SIG_BLOCK
: constant := 0;
199 SIG_UNBLOCK
: constant := 1;
200 SIG_SETMASK
: constant := 2;
202 SIG_DFL
: constant := 0;
203 SIG_IGN
: constant := 1;
207 act
: struct_sigaction_ptr
;
208 oact
: struct_sigaction_ptr
) return int
;
209 pragma Import
(C
, sigaction
, "sigaction");
215 type timespec
is private;
217 function To_Duration
(TS
: timespec
) return Duration;
218 pragma Inline
(To_Duration
);
220 function To_Timespec
(D
: Duration) return timespec
;
221 pragma Inline
(To_Timespec
);
223 type struct_timeval
is private;
225 function To_Duration
(TV
: struct_timeval
) return Duration;
226 pragma Inline
(To_Duration
);
228 function To_Timeval
(D
: Duration) return struct_timeval
;
229 pragma Inline
(To_Timeval
);
231 function gettimeofday
232 (tv
: access struct_timeval
;
233 tz
: System
.Address
:= System
.Null_Address
) return int
;
234 pragma Import
(C
, gettimeofday
, "gettimeofday");
236 function sysconf
(name
: int
) return long
;
237 pragma Import
(C
, sysconf
);
239 SC_CLK_TCK
: constant := 2;
241 -------------------------
242 -- Priority Scheduling --
243 -------------------------
245 SCHED_OTHER
: constant := 0;
246 SCHED_FIFO
: constant := 1;
247 SCHED_RR
: constant := 2;
249 function To_Target_Priority
250 (Prio
: System
.Any_Priority
) return Interfaces
.C
.int
;
251 -- Maps System.Any_Priority to a POSIX priority.
257 type pid_t
is private;
259 function kill
(pid
: pid_t
; sig
: Signal
) return int
;
260 pragma Import
(C
, kill
, "kill");
262 function getpid
return pid_t
;
263 pragma Import
(C
, getpid
, "getpid");
269 type Thread_Body
is access
270 function (arg
: System
.Address
) return System
.Address
;
272 function Thread_Body_Access
is new
273 Unchecked_Conversion
(System
.Address
, Thread_Body
);
275 type pthread_t
is new unsigned_long
;
276 subtype Thread_Id
is pthread_t
;
278 function To_pthread_t
is new Unchecked_Conversion
279 (unsigned_long
, pthread_t
);
281 type pthread_mutex_t
is limited private;
282 type pthread_cond_t
is limited private;
283 type pthread_attr_t
is limited private;
284 type pthread_mutexattr_t
is limited private;
285 type pthread_condattr_t
is limited private;
286 type pthread_key_t
is private;
288 PTHREAD_CREATE_DETACHED
: constant := 1;
294 function Get_Stack_Base
(thread
: pthread_t
) return Address
;
295 pragma Inline
(Get_Stack_Base
);
296 -- This is a dummy procedure to share some GNULLI files
298 ---------------------------------------
299 -- Nonstandard Thread Initialization --
300 ---------------------------------------
302 procedure pthread_init
;
303 pragma Inline
(pthread_init
);
304 -- This is a dummy procedure to share some GNULLI files
306 -------------------------
307 -- POSIX.1c Section 3 --
308 -------------------------
310 function sigwait
(set
: access sigset_t
; sig
: access Signal
) return int
;
311 pragma Import
(C
, sigwait
, "sigwait");
313 function pthread_kill
(thread
: pthread_t
; sig
: Signal
) return int
;
314 pragma Import
(C
, pthread_kill
, "pthread_kill");
316 function pthread_sigmask
318 set
: access sigset_t
;
319 oset
: access sigset_t
) return int
;
320 pragma Import
(C
, pthread_sigmask
, "pthread_sigmask");
322 --------------------------
323 -- POSIX.1c Section 11 --
324 --------------------------
326 function pthread_mutexattr_init
327 (attr
: access pthread_mutexattr_t
) return int
;
328 pragma Import
(C
, pthread_mutexattr_init
, "pthread_mutexattr_init");
330 function pthread_mutexattr_destroy
331 (attr
: access pthread_mutexattr_t
) return int
;
332 pragma Import
(C
, pthread_mutexattr_destroy
, "pthread_mutexattr_destroy");
334 function pthread_mutex_init
335 (mutex
: access pthread_mutex_t
;
336 attr
: access pthread_mutexattr_t
) return int
;
337 pragma Import
(C
, pthread_mutex_init
, "pthread_mutex_init");
339 function pthread_mutex_destroy
(mutex
: access pthread_mutex_t
) return int
;
340 pragma Import
(C
, pthread_mutex_destroy
, "pthread_mutex_destroy");
342 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
;
343 pragma Import
(C
, pthread_mutex_lock
, "pthread_mutex_lock");
345 function pthread_mutex_unlock
(mutex
: access pthread_mutex_t
) return int
;
346 pragma Import
(C
, pthread_mutex_unlock
, "pthread_mutex_unlock");
348 function pthread_condattr_init
349 (attr
: access pthread_condattr_t
) return int
;
350 pragma Import
(C
, pthread_condattr_init
, "pthread_condattr_init");
352 function pthread_condattr_destroy
353 (attr
: access pthread_condattr_t
) return int
;
354 pragma Import
(C
, pthread_condattr_destroy
, "pthread_condattr_destroy");
356 function pthread_cond_init
357 (cond
: access pthread_cond_t
;
358 attr
: access pthread_condattr_t
) return int
;
359 pragma Import
(C
, pthread_cond_init
, "pthread_cond_init");
361 function pthread_cond_destroy
(cond
: access pthread_cond_t
) return int
;
362 pragma Import
(C
, pthread_cond_destroy
, "pthread_cond_destroy");
364 function pthread_cond_signal
(cond
: access pthread_cond_t
) return int
;
365 pragma Import
(C
, pthread_cond_signal
, "pthread_cond_signal");
367 function pthread_cond_wait
368 (cond
: access pthread_cond_t
;
369 mutex
: access pthread_mutex_t
) return int
;
370 pragma Import
(C
, pthread_cond_wait
, "pthread_cond_wait");
372 function pthread_cond_timedwait
373 (cond
: access pthread_cond_t
;
374 mutex
: access pthread_mutex_t
;
375 abstime
: access timespec
) return int
;
376 pragma Import
(C
, pthread_cond_timedwait
, "pthread_cond_timedwait");
378 --------------------------
379 -- POSIX.1c Section 13 --
380 --------------------------
382 type struct_sched_param
is record
383 sched_priority
: int
; -- scheduling priority
385 pragma Convention
(C
, struct_sched_param
);
387 function pthread_setschedparam
390 param
: access struct_sched_param
) return int
;
391 pragma Import
(C
, pthread_setschedparam
, "pthread_setschedparam");
393 function pthread_attr_setschedpolicy
394 (attr
: access pthread_attr_t
;
395 policy
: int
) return int
;
397 (C
, pthread_attr_setschedpolicy
, "pthread_attr_setschedpolicy");
399 function sched_yield
return int
;
400 pragma Import
(C
, sched_yield
, "sched_yield");
402 ---------------------------
403 -- P1003.1c - Section 16 --
404 ---------------------------
406 function pthread_attr_init
407 (attributes
: access pthread_attr_t
) return int
;
408 pragma Import
(C
, pthread_attr_init
, "pthread_attr_init");
410 function pthread_attr_destroy
411 (attributes
: access pthread_attr_t
) return int
;
412 pragma Import
(C
, pthread_attr_destroy
, "pthread_attr_destroy");
414 function pthread_attr_setdetachstate
415 (attr
: access pthread_attr_t
;
416 detachstate
: int
) return int
;
418 (C
, pthread_attr_setdetachstate
, "pthread_attr_setdetachstate");
420 function pthread_attr_setstacksize
421 (attr
: access pthread_attr_t
;
422 stacksize
: size_t
) return int
;
423 pragma Import
(C
, pthread_attr_setstacksize
, "pthread_attr_setstacksize");
425 function pthread_create
426 (thread
: access pthread_t
;
427 attributes
: access pthread_attr_t
;
428 start_routine
: Thread_Body
;
429 arg
: System
.Address
) return int
;
430 pragma Import
(C
, pthread_create
, "pthread_create");
432 procedure pthread_exit
(status
: System
.Address
);
433 pragma Import
(C
, pthread_exit
, "pthread_exit");
435 function pthread_self
return pthread_t
;
436 pragma Import
(C
, pthread_self
, "pthread_self");
438 --------------------------
439 -- POSIX.1c Section 17 --
440 --------------------------
442 function pthread_setspecific
443 (key
: pthread_key_t
;
444 value
: System
.Address
) return int
;
445 pragma Import
(C
, pthread_setspecific
, "pthread_setspecific");
447 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
;
448 pragma Import
(C
, pthread_getspecific
, "pthread_getspecific");
450 type destructor_pointer
is access procedure (arg
: System
.Address
);
452 function pthread_key_create
453 (key
: access pthread_key_t
;
454 destructor
: destructor_pointer
) return int
;
455 pragma Import
(C
, pthread_key_create
, "pthread_key_create");
459 type sigset_t
is record
460 dum0
, dum1
, dum2
, dum3
, dum4
, dum5
, dum6
, dum7
: unsigned_long
;
461 dum8
, dum9
, dum10
, dum11
, dum12
, dum13
, dum14
, dum15
: unsigned_long
;
463 pragma Convention
(C
, sigset_t
);
465 type pid_t
is new int
;
467 type time_t
is new long
;
469 type timespec
is record
473 pragma Convention
(C
, timespec
);
475 type struct_timeval
is record
479 pragma Convention
(C
, struct_timeval
);
481 type pthread_attr_t
is record
482 dum0
, dum1
, dum2
, dum3
, dum4
, dum5
, dum6
: unsigned_long
;
484 pragma Convention
(C
, pthread_attr_t
);
486 type pthread_condattr_t
is record
489 pragma Convention
(C
, pthread_condattr_t
);
491 type pthread_mutexattr_t
is record
494 pragma Convention
(C
, pthread_mutexattr_t
);
496 type pthread_mutex_t
is record
497 dum0
, dum1
, dum2
, dum3
, dum4
: unsigned_long
;
499 pragma Convention
(C
, pthread_mutex_t
);
501 type pthread_cond_t
is record
502 dum0
, dum1
, dum2
, dum3
, dum4
, dum5
: unsigned_long
;
504 pragma Convention
(C
, pthread_cond_t
);
506 type pthread_key_t
is new unsigned
;
508 end System
.OS_Interface
;