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 Florida State University --
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 FSU Threads version of this package
39 -- Turn off polling, we do not want ATC polling to take place during
40 -- tasking operations. It causes infinite loops and other problems.
44 package body System
.OS_Interface
is
52 function To_Duration
(TS
: timespec
) return Duration is
54 return Duration (TS
.tv_sec
) + Duration (TS
.tv_nsec
) / 10#
1#E9
;
57 function To_Duration
(TV
: struct_timeval
) return Duration is
59 return Duration (TV
.tv_sec
) + Duration (TV
.tv_usec
) / 10#
1#E6
;
66 function To_Timespec
(D
: Duration) return timespec
is
71 S
:= time_t
(Long_Long_Integer (D
));
72 F
:= D
- Duration (S
);
74 -- If F has negative value due to a round-up, adjust for positive F
82 return timespec
' (tv_sec => S,
83 tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
90 function To_Timeval (D : Duration) return struct_timeval is
95 S := long (Long_Long_Integer (D));
96 F := D - Duration (S);
98 -- If F has negative value due to a round-up, adjust for positive F
106 return struct_timeval' (tv_sec
=> S
,
107 tv_usec
=> long
(Long_Long_Integer (F
* 10#
1#E6
)));
114 -- FSU_THREADS has a nonstandard sigwait
117 (set
: access sigset_t
;
118 sig
: access Signal
) return int
122 function sigwait_base
(set
: access sigset_t
) return int
;
123 pragma Import
(C
, sigwait_base
, "sigwait");
126 Result
:= sigwait_base
(set
);
133 sig
.all := Signal
(Result
);
137 ------------------------
138 -- pthread_mutex_lock --
139 ------------------------
141 -- FSU_THREADS has nonstandard pthread_mutex_lock and unlock.
142 -- It sets errno but the standard Posix requires it to be returned.
144 function pthread_mutex_lock
(mutex
: access pthread_mutex_t
) return int
is
145 function pthread_mutex_lock_base
146 (mutex
: access pthread_mutex_t
) return int
;
147 pragma Import
(C
, pthread_mutex_lock_base
, "pthread_mutex_lock");
152 Result
:= pthread_mutex_lock_base
(mutex
);
159 end pthread_mutex_lock
;
161 --------------------------
162 -- pthread_mutex_unlock --
163 --------------------------
165 function pthread_mutex_unlock
166 (mutex
: access pthread_mutex_t
) return int
168 function pthread_mutex_unlock_base
169 (mutex
: access pthread_mutex_t
) return int
;
170 pragma Import
(C
, pthread_mutex_unlock_base
, "pthread_mutex_unlock");
175 Result
:= pthread_mutex_unlock_base
(mutex
);
182 end pthread_mutex_unlock
;
184 -----------------------
185 -- pthread_cond_wait --
186 -----------------------
188 -- FSU_THREADS has a nonstandard pthread_cond_wait.
189 -- The FSU_THREADS version returns EINTR when interrupted.
191 function pthread_cond_wait
192 (cond
: access pthread_cond_t
;
193 mutex
: access pthread_mutex_t
) return int
195 function pthread_cond_wait_base
196 (cond
: access pthread_cond_t
;
197 mutex
: access pthread_mutex_t
) return int
;
198 pragma Import
(C
, pthread_cond_wait_base
, "pthread_cond_wait");
203 Result
:= pthread_cond_wait_base
(cond
, mutex
);
205 if Result
= EINTR
then
210 end pthread_cond_wait
;
212 ----------------------------
213 -- pthread_cond_timedwait --
214 ----------------------------
216 -- FSU_THREADS has a nonstandard pthread_cond_timedwait. The
217 -- FSU_THREADS version returns -1 and set errno to EAGAIN for timeout.
219 function pthread_cond_timedwait
220 (cond
: access pthread_cond_t
;
221 mutex
: access pthread_mutex_t
;
222 abstime
: access timespec
) return int
224 function pthread_cond_timedwait_base
225 (cond
: access pthread_cond_t
;
226 mutex
: access pthread_mutex_t
;
227 abstime
: access timespec
) return int
;
228 pragma Import
(C
, pthread_cond_timedwait_base
, "pthread_cond_timedwait");
233 Result
:= pthread_cond_timedwait_base
(cond
, mutex
, abstime
);
236 if errno
= EAGAIN
then
244 end pthread_cond_timedwait
;
246 ---------------------------
247 -- pthread_setschedparam --
248 ---------------------------
250 -- FSU_THREADS does not have pthread_setschedparam
252 -- This routine returns a non-negative value upon failure
253 -- but the error code can not be set conforming the POSIX standard.
255 function pthread_setschedparam
258 param
: access struct_sched_param
) return int
260 function pthread_setschedattr
262 attr
: pthread_attr_t
) return int
;
263 pragma Import
(C
, pthread_setschedattr
, "pthread_setschedattr");
265 attr
: aliased pthread_attr_t
;
269 Result
:= pthread_attr_init
(attr
'Access);
275 attr
.sched
:= policy
;
277 -- Short-cut around pthread_attr_setprio
279 attr
.prio
:= param
.sched_priority
;
281 Result
:= pthread_setschedattr
(thread
, attr
);
287 Result
:= pthread_attr_destroy
(attr
'Access);
294 end pthread_setschedparam
;
296 -------------------------
297 -- pthread_getspecific --
298 -------------------------
300 -- FSU_THREADS has a nonstandard pthread_getspecific
302 function pthread_getspecific
(key
: pthread_key_t
) return System
.Address
is
303 function pthread_getspecific_base
304 (key
: pthread_key_t
;
305 value
: access System
.Address
) return int
;
306 pragma Import
(C
, pthread_getspecific_base
, "pthread_getspecific");
308 Tmp
: aliased System
.Address
;
312 Result
:= pthread_getspecific_base
(key
, Tmp
'Access);
315 return System
.Null_Address
;
319 end pthread_getspecific
;
321 ---------------------------------
322 -- pthread_attr_setdetachstate --
323 ---------------------------------
325 function pthread_attr_setdetachstate
326 (attr
: access pthread_attr_t
;
327 detachstate
: int
) return int
329 function pthread_attr_setdetachstate_base
330 (attr
: access pthread_attr_t
;
331 detachstate
: access int
) return int
;
333 (C
, pthread_attr_setdetachstate_base
, "pthread_attr_setdetachstate");
335 Tmp
: aliased int
:= detachstate
;
338 return pthread_attr_setdetachstate_base
(attr
, Tmp
'Access);
339 end pthread_attr_setdetachstate
;
345 -- FSU_THREADS does not have sched_yield;
347 function sched_yield
return int
is
348 procedure sched_yield_base
(arg
: System
.Address
);
349 pragma Import
(C
, sched_yield_base
, "pthread_yield");
352 sched_yield_base
(System
.Null_Address
);
360 function Get_Stack_Base
(thread
: pthread_t
) return Address
is
362 return thread
.stack_base
;
365 end System
.OS_Interface
;