New Language: Ada

From-SVN: r45952

1 files changed, 366 insertions, 0 deletions

diff --git a/gcc/ada/7sosinte.adb b/gcc/ada/7sosinte.adb
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+------------------------------------------------------------------------------
+--                                                                          --
+--                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: 1.6 $
+--                                                                          --
+--            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;