Virgin import of gcc from EGCS 1.1.2

1 files changed, 99 insertions, 0 deletions

diff --git a/contrib/gcc/gthr.h b/contrib/gcc/gthr.h
new file mode 100644
index 000000000000..d1028cb58e93
--- /dev/null
+++ b/contrib/gcc/gthr.h
@@ -0,0 +1,99 @@
+/* Threads compatibily routines for libgcc2.  */
+/* Compile this one with gcc.  */
+/* Copyright (C) 1997 Free Software Foundation, Inc.
+
+This file is part of GNU CC.
+
+GNU CC 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.
+
+GNU CC 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 GNU CC; 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 __gthr_h
+#define __gthr_h
+
+/* If this file is compiled with threads support, it must
+       #define __GTHREADS 1
+   to indicate that threads support is present.  Also it has define
+   function 
+     int __gthread_active_p ()
+   that returns 1 if thread system is active, 0 if not.
+
+   The threads interface must define the following types:
+     __gthread_key_t
+     __gthread_once_t
+     __gthread_mutex_t
+
+   The threads interface must define the following macros:
+
+     __GTHREAD_ONCE_INIT
+     		to initialize __gthread_once_t
+     __GTHREAD_MUTEX_INIT
+     		to initialize __gthread_mutex_t to get a fast
+		non-recursive mutex.
+
+   The threads interface must define the following static functions:
+
+     int __gthread_once (__gthread_once_t *once, void (*func) ())
+
+     int __gthread_key_create (__gthread_key_t *keyp, void (*dtor) (void *))
+     int __gthread_key_delete (__gthread_key_t key)
+
+     int __gthread_key_dtor (__gthread_key_t key, void *ptr)
+
+     void *__gthread_getspecific (__gthread_key_t key)
+     int __gthread_setspecific (__gthread_key_t key, const void *ptr)
+
+     int __gthread_mutex_lock (__gthread_mutex_t *mutex);
+     int __gthread_mutex_trylock (__gthread_mutex_t *mutex);
+     int __gthread_mutex_unlock (__gthread_mutex_t *mutex);
+
+   All functions returning int should return zero on success or the error
+   number.  If the operation is not supported, -1 is returned.
+
+   Currently supported threads packages are
+     POSIX threads with -D_PTHREADS
+     DCE threads with -D_DCE_THREADS
+     Solaris/UI threads with -D_SOLARIS_THREADS
+*/
+
+/* Check first for thread specific defines. */
+#if _PTHREADS
+#include "gthr-posix.h"
+#elif _DCE_THREADS
+#include "gthr-dce.h"
+#elif _SOLARIS_THREADS
+#include "gthr-solaris.h"
+
+/* Include GTHREAD_FILE if one is defined. */
+#elif defined(HAVE_GTHR_DEFAULT)
+#if SUPPORTS_WEAK
+#ifndef GTHREAD_USE_WEAK
+#define GTHREAD_USE_WEAK 1
+#endif
+#endif
+#include "gthr-default.h"
+
+/* Fallback to single thread definitions. */
+#else
+#include "gthr-single.h"
+#endif
+
+#endif /* not __gthr_h */