* Makefile.in (GTHREAD_FLAGS): New var.

	(LIBGCC2_CFLAGS): Added $(GTHREAD_FLAGS).
	(distclean): Remove gthr-default.h.
	* configure.in: Accept dce as a thread package.
	Check for thread.h and pthread.h.
	Link gthr-default.h to appropriate thread file and set
	gthread_flags.
	(hppa1.1-*-hpux10*): If --enable-threads, use dce threads and
	include multilib definitions from pa/t-dce-thr.
	(sparc-*-solaris2*): Enable threads by default, if thread.h or
	pthread.h is found, preferring posix threads over solaris ones.
	* config/pa/t-dce-thr: New file.
	* config/pa/t-pa: Removed multilibs.
	* config/sparc/t-sol2: Ditto.
	* gthr.h: New file.
	* gthr-single.h: New file.
	* gthr-posix.h: New file.
	* gthr-solaris.h: New file.
	* gthr-dce.h: New file.
	* libgcc-thr.h: Removed.
	* objc/thr-dce.c: New file copied from thr-decosf1.c.
	* frame.c: Include gthr.h instead of libgcc-thr.h.
	* libgcc2.c: Include gthr.h instead of libgcc-thr.h.
	(eh_context_initialize): If __gthread_once fails, use static eh
	context.
	(eh_context_free): Call __gthread_key_dtor.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@17235 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 96 insertions, 0 deletions

diff --git a/gcc/gthr.h b/gcc/gthr.h
new file mode 100644
index 00000000000..54ad6b04c8d
--- /dev/null
+++ b/gcc/gthr.h
@@ -0,0 +1,96 @@
+/* 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 0 on success, -1 on error.
+
+   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 SUPPORTS_WEAK && HAVE_GTHR_DEFAULT
+#ifndef GTHREAD_USE_WEAK
+#define GTHREAD_USE_WEAK 1
+#endif
+#include "gthr-default.h"
+
+/* Fallback to single thread definitions. */
+#else
+#include "gthr-single.h"
+#endif
+
+#endif /* not __gthr_h */