+++ /dev/null
-------------------------------------------------------------------------------
--- --
--- GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS --
--- --
--- S Y S T E M . O S _ I N T E R F A C E --
--- --
--- B o d y --
--- --
--- $Revision: 1.1 $
--- --
--- Copyright (C) 1997-2001 Florida State University --
--- --
--- GNARL is free software; you can redistribute it and/or modify it under --
--- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
--- sion. GNARL is distributed in the hope that it will be useful, but WITH- --
--- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNARL; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
--- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
--- --
--- GNARL was developed by the GNARL team at Florida State University. It is --
--- now maintained by Ada Core Technologies Inc. in cooperation with Florida --
--- State University (http://www.gnat.com). --
--- --
-------------------------------------------------------------------------------
-
--- This is a FSU Threads version of this package
-
-pragma Polling (Off);
--- Turn off polling, we do not want ATC polling to take place during
--- tasking operations. It causes infinite loops and other problems.
-
-with Interfaces.C;
-
-package body System.OS_Interface is
-
- use Interfaces.C;
-
- -----------------
- -- To_Duration --
- -----------------
-
- function To_Duration (TS : timespec) return Duration is
- begin
- return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
- end To_Duration;
-
- function To_Duration (TV : struct_timeval) return Duration is
- begin
- return Duration (TV.tv_sec) + Duration (TV.tv_usec) / 10#1#E6;
- end To_Duration;
-
- -----------------
- -- To_Timespec --
- -----------------
-
- function To_Timespec (D : Duration) return timespec is
- S : time_t;
- F : Duration;
-
- begin
- S := time_t (Long_Long_Integer (D));
- F := D - Duration (S);
-
- -- If F has negative value due to a round-up, adjust for positive F
- -- value.
-
- if F < 0.0 then
- S := S - 1;
- F := F + 1.0;
- end if;
-
- return timespec' (tv_sec => S,
- tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
- end To_Timespec;
-
- ----------------
- -- To_Timeval --
- ----------------
-
- function To_Timeval (D : Duration) return struct_timeval is
- S : long;
- F : Duration;
-
- begin
- S := long (Long_Long_Integer (D));
- F := D - Duration (S);
-
- -- If F has negative value due to a round-up, adjust for positive F
- -- value.
-
- if F < 0.0 then
- S := S - 1;
- F := F + 1.0;
- end if;
-
- return struct_timeval' (tv_sec => S,
- tv_usec => long (Long_Long_Integer (F * 10#1#E6)));
- end To_Timeval;
-
- -------------
- -- sigwait --
- -------------
-
- -- FSU_THREADS has a nonstandard sigwait
-
- function sigwait
- (set : access sigset_t;
- sig : access Signal) return int
- is
- Result : int;
-
- function sigwait_base (set : access sigset_t) return int;
- pragma Import (C, sigwait_base, "sigwait");
-
- begin
- Result := sigwait_base (set);
-
- if Result = -1 then
- sig.all := 0;
- return errno;
- end if;
-
- sig.all := Signal (Result);
- return 0;
- end sigwait;
-
- ------------------------
- -- pthread_mutex_lock --
- ------------------------
-
- -- FSU_THREADS has nonstandard pthread_mutex_lock and unlock.
- -- It sets errno but the standard Posix requires it to be returned.
-
- function pthread_mutex_lock (mutex : access pthread_mutex_t) return int is
- function pthread_mutex_lock_base
- (mutex : access pthread_mutex_t) return int;
- pragma Import (C, pthread_mutex_lock_base, "pthread_mutex_lock");
-
- Result : int;
-
- begin
- Result := pthread_mutex_lock_base (mutex);
-
- if Result /= 0 then
- return errno;
- end if;
-
- return 0;
- end pthread_mutex_lock;
-
- --------------------------
- -- pthread_mutex_unlock --
- --------------------------
-
- function pthread_mutex_unlock
- (mutex : access pthread_mutex_t) return int
- is
- function pthread_mutex_unlock_base
- (mutex : access pthread_mutex_t) return int;
- pragma Import (C, pthread_mutex_unlock_base, "pthread_mutex_unlock");
-
- Result : int;
-
- begin
- Result := pthread_mutex_unlock_base (mutex);
-
- if Result /= 0 then
- return errno;
- end if;
-
- return 0;
- end pthread_mutex_unlock;
-
- -----------------------
- -- pthread_cond_wait --
- -----------------------
-
- -- FSU_THREADS has a nonstandard pthread_cond_wait.
- -- The FSU_THREADS version returns EINTR when interrupted.
-
- function pthread_cond_wait
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t) return int
- is
- function pthread_cond_wait_base
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t) return int;
- pragma Import (C, pthread_cond_wait_base, "pthread_cond_wait");
-
- Result : int;
-
- begin
- Result := pthread_cond_wait_base (cond, mutex);
-
- if Result = EINTR then
- return 0;
- else
- return Result;
- end if;
- end pthread_cond_wait;
-
- ----------------------------
- -- pthread_cond_timedwait --
- ----------------------------
-
- -- FSU_THREADS has a nonstandard pthread_cond_timedwait. The
- -- FSU_THREADS version returns -1 and set errno to EAGAIN for timeout.
-
- function pthread_cond_timedwait
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t;
- abstime : access timespec) return int
- is
- function pthread_cond_timedwait_base
- (cond : access pthread_cond_t;
- mutex : access pthread_mutex_t;
- abstime : access timespec) return int;
- pragma Import (C, pthread_cond_timedwait_base, "pthread_cond_timedwait");
-
- Result : int;
-
- begin
- Result := pthread_cond_timedwait_base (cond, mutex, abstime);
-
- if Result = -1 then
- if errno = EAGAIN then
- return ETIMEDOUT;
- else
- return EINVAL;
- end if;
- end if;
-
- return 0;
- end pthread_cond_timedwait;
-
- ---------------------------
- -- pthread_setschedparam --
- ---------------------------
-
- -- FSU_THREADS does not have pthread_setschedparam
-
- -- This routine returns a non-negative value upon failure
- -- but the error code can not be set conforming the POSIX standard.
-
- function pthread_setschedparam
- (thread : pthread_t;
- policy : int;
- param : access struct_sched_param) return int
- is
- function pthread_setschedattr
- (thread : pthread_t;
- attr : pthread_attr_t) return int;
- pragma Import (C, pthread_setschedattr, "pthread_setschedattr");
-
- attr : aliased pthread_attr_t;
- Result : int;
-
- begin
- Result := pthread_attr_init (attr'Access);
-
- if Result /= 0 then
- return Result;
- end if;
-
- attr.sched := policy;
-
- -- Short-cut around pthread_attr_setprio
-
- attr.prio := param.sched_priority;
-
- Result := pthread_setschedattr (thread, attr);
-
- if Result /= 0 then
- return Result;
- end if;
-
- Result := pthread_attr_destroy (attr'Access);
-
- if Result /= 0 then
- return Result;
- else
- return 0;
- end if;
- end pthread_setschedparam;
-
- -------------------------
- -- pthread_getspecific --
- -------------------------
-
- -- FSU_THREADS has a nonstandard pthread_getspecific
-
- function pthread_getspecific (key : pthread_key_t) return System.Address is
- function pthread_getspecific_base
- (key : pthread_key_t;
- value : access System.Address) return int;
- pragma Import (C, pthread_getspecific_base, "pthread_getspecific");
-
- Tmp : aliased System.Address;
- Result : int;
-
- begin
- Result := pthread_getspecific_base (key, Tmp'Access);
-
- if Result /= 0 then
- return System.Null_Address;
- end if;
-
- return Tmp;
- end pthread_getspecific;
-
- ---------------------------------
- -- pthread_attr_setdetachstate --
- ---------------------------------
-
- function pthread_attr_setdetachstate
- (attr : access pthread_attr_t;
- detachstate : int) return int
- is
- function pthread_attr_setdetachstate_base
- (attr : access pthread_attr_t;
- detachstate : access int) return int;
- pragma Import
- (C, pthread_attr_setdetachstate_base, "pthread_attr_setdetachstate");
-
- Tmp : aliased int := detachstate;
-
- begin
- return pthread_attr_setdetachstate_base (attr, Tmp'Access);
- end pthread_attr_setdetachstate;
-
- -----------------
- -- sched_yield --
- -----------------
-
- -- FSU_THREADS does not have sched_yield;
-
- function sched_yield return int is
- procedure sched_yield_base (arg : System.Address);
- pragma Import (C, sched_yield_base, "pthread_yield");
-
- begin
- sched_yield_base (System.Null_Address);
- return 0;
- end sched_yield;
-
- ----------------
- -- Stack_Base --
- ----------------
-
- function Get_Stack_Base (thread : pthread_t) return Address is
- begin
- return thread.stack_base;
- end Get_Stack_Base;
-
-end System.OS_Interface;
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