From adbec39bbf671ad80f6c557801e274cac0d305fa Mon Sep 17 00:00:00 2001
From: Keith Whitwell <keith@tungstengraphics.com>
Date: Wed, 6 Aug 2003 17:59:57 +0000
Subject: r200 driver, brought over by Jon Smirl

---
 src/mesa/drivers/dri/r200/r200_lock.h | 112 ++++++++++++++++++++++++++++++++++
 1 file changed, 112 insertions(+)
 create mode 100644 src/mesa/drivers/dri/r200/r200_lock.h

(limited to 'src/mesa/drivers/dri/r200/r200_lock.h')

diff --git a/src/mesa/drivers/dri/r200/r200_lock.h b/src/mesa/drivers/dri/r200/r200_lock.h
new file mode 100644
index 0000000000..59bc1d656e
--- /dev/null
+++ b/src/mesa/drivers/dri/r200/r200_lock.h
@@ -0,0 +1,112 @@
+/* $XFree86$ */
+/**************************************************************************
+Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
+
+The Weather Channel (TM) funded Tungsten Graphics to develop the
+initial release of the Radeon 8500 driver under the XFree86 license.
+This notice must be preserved.
+
+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, sublicense, 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 NONINFRINGEMENT.
+IN NO EVENT SHALL THE COPYRIGHT OWNER(S) 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.
+
+**************************************************************************/
+
+/*
+ * Authors:
+ *   Keith Whitwell <keith@tungstengraphics.com>
+ */
+
+#ifndef __R200_LOCK_H__
+#define __R200_LOCK_H__
+
+#ifdef GLX_DIRECT_RENDERING
+
+extern void r200GetLock( r200ContextPtr rmesa, GLuint flags );
+
+/* Turn DEBUG_LOCKING on to find locking conflicts.
+ */
+#define DEBUG_LOCKING	0
+
+#if DEBUG_LOCKING
+extern char *prevLockFile;
+extern int prevLockLine;
+
+#define DEBUG_LOCK()							\
+   do {									\
+      prevLockFile = (__FILE__);					\
+      prevLockLine = (__LINE__);					\
+   } while (0)
+
+#define DEBUG_RESET()							\
+   do {									\
+      prevLockFile = 0;							\
+      prevLockLine = 0;							\
+   } while (0)
+
+#define DEBUG_CHECK_LOCK()						\
+   do {									\
+      if ( prevLockFile ) {						\
+	 fprintf( stderr,						\
+		  "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",	\
+		  prevLockFile, prevLockLine, __FILE__, __LINE__ );	\
+	 exit( 1 );							\
+      }									\
+   } while (0)
+
+#else
+
+#define DEBUG_LOCK()
+#define DEBUG_RESET()
+#define DEBUG_CHECK_LOCK()
+
+#endif
+
+/*
+ * !!! We may want to separate locks from locks with validation.  This
+ * could be used to improve performance for those things commands that
+ * do not do any drawing !!!
+ */
+
+
+/* Lock the hardware and validate our state.
+ */
+#define LOCK_HARDWARE( rmesa )					\
+   do {								\
+      char __ret = 0;						\
+      DEBUG_CHECK_LOCK();					\
+      DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext,		\
+	       (DRM_LOCK_HELD | rmesa->dri.hwContext), __ret );	\
+      if ( __ret )						\
+	 r200GetLock( rmesa, 0 );				\
+      DEBUG_LOCK();						\
+   } while (0)
+
+/* Unlock the hardware.
+ */
+#define UNLOCK_HARDWARE( rmesa )					\
+   do {									\
+      DRM_UNLOCK( rmesa->dri.fd,					\
+		  rmesa->dri.hwLock,					\
+		  rmesa->dri.hwContext );				\
+      DEBUG_RESET();							\
+   } while (0)
+
+#endif
+#endif /* __R200_LOCK_H__ */
-- 
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