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

1 files changed, 84 insertions, 0 deletions

diff --git a/gcc/gthr-gnat.c b/gcc/gthr-gnat.c
new file mode 100644
index 0000000..9620135
--- /dev/null
+++ b/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
+