PR debug/42897

[pf3gnuchains/gcc-fork.git] / gcc / gthr-vxworks.h

diff --git a/gcc/gthr-vxworks.h b/gcc/gthr-vxworks.h
index c11d3a2..d4da14e 100644 (file)
--- a/gcc/gthr-vxworks.h
+++ b/gcc/gthr-vxworks.h
@@ -1,13 +1,13 @@
 /* Threads compatibility routines for libgcc2 and libobjc for VxWorks.  */
 /* Compile this one with gcc.  */
-/* Copyright (C) 1997, 1999, 2000 Free Software Foundation, Inc.
+/* Copyright (C) 1997, 1999, 2000, 2008, 2009 Free Software Foundation, Inc.
    Contributed by Mike Stump <mrs@wrs.com>.
 
 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
+Software Foundation; either version 3, or (at your option) any later
 version.
 
 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
@@ -15,17 +15,14 @@ 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, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA.  */
+Under Section 7 of GPL version 3, you are granted additional
+permissions described in the GCC Runtime Library Exception, version
+3.1, as published by the Free Software Foundation.
 
-/* 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.  */
+You should have received a copy of the GNU General Public License and
+a copy of the GCC Runtime Library Exception along with this program;
+see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+<http://www.gnu.org/licenses/>.  */
 
 #ifndef GCC_GTHR_VXWORKS_H
 #define GCC_GTHR_VXWORKS_H
@@ -36,6 +33,11 @@ Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
 #include "gthr-posix.h"
 
 #else
+#ifdef __cplusplus
+#define UNUSED(x)
+#else
+#define UNUSED(x) x __attribute__((unused))
+#endif
 
 #ifdef __cplusplus
 extern "C" {
@@ -61,6 +63,12 @@ __gthread_mutex_init_function (__gthread_mutex_t *mutex)
 }
 
 static inline int
+__gthread_mutex_destroy (__gthread_mutex_t * UNUSED(mutex))
+{
+  return 0;
+}
+
+static inline int
 __gthread_mutex_lock (__gthread_mutex_t *mutex)
 {
   return semTake (*mutex, WAIT_FOREVER);
@@ -107,20 +115,35 @@ __gthread_recursive_mutex_unlock (__gthread_recursive_mutex_t *mutex)
 
 typedef struct
 {
-#ifndef __RTP__
+#if !defined(__RTP__)
+#if defined(__PPC__)
+  __attribute ((aligned (__alignof (unsigned))))
+#endif
   volatile unsigned char busy;
 #endif
   volatile unsigned char done;
+#if !defined(__RTP__) && defined(__PPC__)
+  /* PPC's test-and-set implementation requires a 4 byte aligned
+     object, of which it only sets the first byte.  We use padding
+     here, in order to maintain some amount of backwards
+     compatibility.  Without this padding, gthread_once objects worked
+     by accident because they happen to be static objects and the ppc
+     port automatically increased their alignment to 4 bytes.  */
+  unsigned char pad1;
+  unsigned char pad2;
+#endif
 }
 __gthread_once_t;
 
-#ifndef __RTP__
-# define __GTHREAD_ONCE_INIT { 0, 0 }
-#else
+#if defined (__RTP__)
 # define __GTHREAD_ONCE_INIT { 0 }
+#elif defined (__PPC__)
+# define __GTHREAD_ONCE_INIT { 0, 0, 0, 0 }
+#else
+# define __GTHREAD_ONCE_INIT { 0, 0 }
 #endif
 
-extern int __gthread_once (__gthread_once_t *once, void (*func)(void));
+extern int __gthread_once (__gthread_once_t *__once, void (*__func)(void));
 
 /* Thread-specific data requires a great deal of effort, since VxWorks
    is not really set up for it.  See config/vxlib.c for the gory
@@ -129,11 +152,13 @@ extern int __gthread_once (__gthread_once_t *once, void (*func)(void));
 
 typedef unsigned int __gthread_key_t;
 
-extern int __gthread_key_create (__gthread_key_t *keyp, void (*dtor)(void *));
-extern int __gthread_key_delete (__gthread_key_t key);
+extern int __gthread_key_create (__gthread_key_t *__keyp, void (*__dtor)(void *));
+extern int __gthread_key_delete (__gthread_key_t __key);
+
+extern void *__gthread_getspecific (__gthread_key_t __key);
+extern int __gthread_setspecific (__gthread_key_t __key, void *__ptr);
 
-extern void *__gthread_getspecific (__gthread_key_t key);
-extern int __gthread_setspecific (__gthread_key_t key, void *ptr);
+#undef UNUSED
 
 #ifdef __cplusplus
 }