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+/**************************************************************************
+ *
+ * Copyright 2007 Tungsten Graphics, Inc., Cedar Park, Texas.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
+ * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
+ * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+#ifndef P_INLINES_H
+#define P_INLINES_H
+
+#include "p_context.h"
+//#include "p_util.h"
+
+/**
+ * Set 'ptr' to point to 'region' and update reference counting.
+ * The old thing pointed to, if any, will be unreferenced first.
+ * 'region' may be NULL.
+ */
+static INLINE void
+pipe_region_reference(struct pipe_region **ptr, struct pipe_region *region)
+{
+ assert(ptr);
+ if (*ptr) {
+ /* unreference the old thing */
+ struct pipe_region *oldReg = *ptr;
+ assert(oldReg->refcount > 0);
+ oldReg->refcount--;
+ if (oldReg->refcount == 0) {
+ /* free the old region */
+ assert(oldReg->map_refcount == 0);
+ /* XXX dereference the region->buffer */
+ FREE( oldReg );
+ }
+ *ptr = NULL;
+ }
+ if (region) {
+ /* reference the new thing */
+ region->refcount++;
+ *ptr = region;
+ }
+}
+
+/**
+ * \sa pipe_region_reference
+ */
+static INLINE void
+pipe_surface_reference(struct pipe_surface **ptr, struct pipe_surface *surf)
+{
+ assert(ptr);
+ if (*ptr) {
+ /* unreference the old thing */
+ struct pipe_surface *oldSurf = *ptr;
+ assert(oldSurf->refcount > 0);
+ oldSurf->refcount--;
+ if (oldSurf->refcount == 0) {
+ /* free the old region */
+ pipe_region_reference(&oldSurf->region, NULL);
+ FREE( oldSurf );
+ }
+ *ptr = NULL;
+ }
+ if (surf) {
+ /* reference the new thing */
+ surf->refcount++;
+ *ptr = surf;
+ }
+}
+
+#endif /* P_INLINES_H */