gthr-gnat.h, [...]: new sources for implementation of --enable-threads=gnat.

* gthr-gnat.h, gthr-gnat.c: new sources for implementation of
        --enable-threads=gnat.
        * Makefile.in: Add gthr-gnat.c to LIB2ADDEH.
        * configure.in: Add gnat to the list of thread packages
        * configure: Rebuild.
        * config/t-linux: Add gthr-gnat.c to LIB2ADDEH and LIB2ADDEHDEP

From-SVN: r65961

gcc/ChangeLog

@@ -1,3 +1,12 @@
+2003-04-22  Vincent Celier <celier@gnat.com>
+
+        * gthr-gnat.h, gthr-gnat.c: new sources for implementation of
+        --enable-threads=gnat.
+        * Makefile.in: Add gthr-gnat.c to LIB2ADDEH.
+        * configure.in: Add gnat to the list of thread packages
+        * configure: Rebuild.
+        * config/t-linux: Add gthr-gnat.c to LIB2ADDEH and LIB2ADDEHDEP
+
 2003-04-22  Neil Booth  <neil@daikokuya.co.uk>
 
 	* cpplex.c (_cpp_get_fresh_line): Pop the buffer if return_at_eof.

gcc/Makefile.in

@@ -471,7 +471,7 @@ CRTSTUFF_CFLAGS = -O2 $(GCC_CFLAGS) $(INCLUDES) $(MULTILIB_CFLAGS) -g0 \
 
 # Additional sources to handle exceptions; overridden by targets as needed.
 LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde.c \
-  $(srcdir)/unwind-sjlj.c
+   $(srcdir)/unwind-sjlj.c $(srcdir)/gthr-gnat.c
 LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h
 
 # nm flags to list global symbols in libgcc object files.

gcc/config/t-linux

@@ -12,5 +12,5 @@ SHLIB_MAPFILES += $(srcdir)/config/libgcc-glibc.ver
 
 # Use unwind-dw2-fde-glibc
 LIB2ADDEH = $(srcdir)/unwind-dw2.c $(srcdir)/unwind-dw2-fde-glibc.c \
-  $(srcdir)/unwind-sjlj.c
-LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h unwind-dw2-fde.c
+  $(srcdir)/unwind-sjlj.c $(srcdir)/gthr-gnat.c
+LIB2ADDEHDEP = unwind.inc unwind-dw2-fde.h unwind-dw2-fde.c gthr-gnat.c

gcc/configure

@@ -2305,7 +2305,7 @@ case x${enable_threads_flag} in
 		target_thread_file=''
 		;;
 	xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
-	xsolaris | xwin32 | xdce | xrtems| xvxworks | xaix)
+	xsolaris | xwin32 | xdce | xrtems| xvxworks | xaix | xgnat)
 		target_thread_file=$enable_threads_flag
 		;;
 	*)
@@ -2434,7 +2434,7 @@ fi
 
 
 # Find some useful tools
-for ac_prog in gawk mawk nawk awk
+for ac_prog in mawk gawk nawk awk
 do
 # Extract the first word of "$ac_prog", so it can be a program name with args.
 set dummy $ac_prog; ac_word=$2

gcc/configure.in

@@ -518,7 +518,7 @@ case x${enable_threads_flag} in
 		target_thread_file=''
 		;;
 	xdecosf1 | xirix | xmach | xos2 | xposix | xpthreads | xsingle | \
-	xsolaris | xwin32 | xdce | xrtems| xvxworks | xaix)
+	xsolaris | xwin32 | xdce | xrtems| xvxworks | xaix | xgnat)
 		target_thread_file=$enable_threads_flag
 		;;
 	*)

gcc/gthr-gnat.c

@@ -0,0 +1,84 @@
+/* Threads compatibility routines for libgcc2.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+
+GCC is distributed in the hope that it will be useful, but WITHOUT 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
+along with GCC; see the 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 you link this library with other files,
+   some of which are compiled with GCC, to produce an executable,
+   this library 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 General Public License.  */
+
+
+#include "gthr-gnat.h"
+
+#ifdef __cplusplus
+#define UNUSED(x)
+#else
+#define UNUSED(x) x __attribute__((unused))
+#endif
+
+void
+__gnat_default_lock (void)
+{
+  return;
+}
+
+void
+__gnat_default_unlock (void)
+{
+  return;
+}
+
+static void (*__gnat_task_lock) () = *__gnat_default_lock;
+static void (*__gnat_task_unlock) () = *__gnat_default_unlock;
+
+ void
+__gnat_install_locks (lock, unlock)
+     void (*lock) ();
+     void (*unlock) ();
+{
+  __gnat_task_lock = lock;
+  __gnat_task_unlock = unlock;
+
+}
+
+int
+__gthread_active_p (void)
+{
+  return 0;
+}
+
+int
+__gthread_mutex_lock (__gthread_mutex_t * UNUSED (mutex))
+{
+  __gnat_task_lock ();
+  return 0;
+}
+
+int
+__gthread_mutex_unlock (__gthread_mutex_t * UNUSED (mutex))
+{
+  __gnat_task_unlock ();
+  return 0;
+}
+
+#undef UNUSED
+

gcc/gthr-gnat.h

@@ -0,0 +1,43 @@
+/* Threads compatibility routines for libgcc2.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 2003 Free Software Foundation, Inc.
+
+This file is part of GCC.
+
+GCC is free software; you can redistribute it and/or modify it under
+the terms of the GNU General Public License as published by the Free
+Software Foundation; either version 2, or (at your option) any later
+version.
+GCC is distributed in the hope that it will be useful, but WITHOUT 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
+along with GCC; see the 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 you link this library with other files,
+   some of which are compiled with GCC, to produce an executable,
+   this library 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 General Public License.  */
+
+#ifndef GCC_GTHR_GNAT_H
+#define GCC_GTHR_GNAT_H
+
+/* Just provide compatibility for mutex handling.  */
+
+typedef int __gthread_mutex_t;
+
+#define __GTHREAD_MUTEX_INIT 0
+
+extern void __gnat_install_locks (void (*lock) (), void (*unlock) ());
+extern int __gthread_active_p (void);
+extern int __gthread_mutex_lock (__gthread_mutex_t *);
+extern int __gthread_mutex_unlock (__gthread_mutex_t *);
+
+#endif /* ! GCC_GTHR_GNAT_H */
+