From e05ab2795b7463a053562b233d75e62f4138e0d3 Mon Sep 17 00:00:00 2001
From: Alan Hourihane <alanh@tungstengraphics.com>
Date: Thu, 4 Dec 2003 13:27:05 +0000
Subject: add tdfx DRI driver

---
 src/mesa/drivers/dri/tdfx/tdfx_lock.h | 149 ++++++++++++++++++++++++++++++++++
 1 file changed, 149 insertions(+)
 create mode 100644 src/mesa/drivers/dri/tdfx/tdfx_lock.h

(limited to 'src/mesa/drivers/dri/tdfx/tdfx_lock.h')

diff --git a/src/mesa/drivers/dri/tdfx/tdfx_lock.h b/src/mesa/drivers/dri/tdfx/tdfx_lock.h
new file mode 100644
index 0000000000..90d4937628
--- /dev/null
+++ b/src/mesa/drivers/dri/tdfx/tdfx_lock.h
@@ -0,0 +1,149 @@
+/* -*- mode: c; c-basic-offset: 3 -*-
+ *
+ * Copyright 2000 VA Linux Systems Inc., Fremont, California.
+ *
+ * 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, 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
+ * VA LINUX SYSTEMS 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.
+ */
+/* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_lock.h,v 1.3 2002/02/22 21:45:03 dawes Exp $ */
+
+/*
+ * Original rewrite:
+ *	Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
+ *
+ * Authors:
+ *	Gareth Hughes <gareth@valinux.com>
+ *
+ */
+
+#ifndef __TDFX_LOCK_H__
+#define __TDFX_LOCK_H__
+
+#ifdef GLX_DIRECT_RENDERING
+
+/* You can turn this 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 /* DEBUG_LOCKING */
+
+
+extern void tdfxGetLock( tdfxContextPtr fxMesa );
+
+
+/* !!! 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 !!! */
+
+#define DRM_LIGHT_LOCK_RETURN(fd,lock,context,__ret)                   \
+	do {                                                           \
+		DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
+                if (__ret) drmGetLock(fd,context,0);                   \
+        } while(0)
+
+#define LOCK_HARDWARE( fxMesa )						\
+   do {									\
+      char __ret = 0;							\
+									\
+      DEBUG_CHECK_LOCK();						\
+      DRM_CAS( fxMesa->driHwLock, fxMesa->hHWContext,			\
+	      DRM_LOCK_HELD | fxMesa->hHWContext, __ret );		\
+      if ( __ret ) {							\
+	 tdfxGetLock( fxMesa );						\
+      }									\
+      DEBUG_LOCK();							\
+   } while (0)
+
+/* Unlock the hardware using the global current context */
+#define UNLOCK_HARDWARE( fxMesa )					\
+  do {									\
+    DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext );	\
+    DEBUG_RESET();							\
+  } while (0)
+
+/*
+ * This pair of macros makes a loop over the drawing operations
+ * so it is not self contained and doesn't have the nice single
+ * statement semantics of most macros.
+ */
+#define BEGIN_CLIP_LOOP(fxMesa)			\
+  do {						\
+    LOCK_HARDWARE( fxMesa );			\
+    BEGIN_CLIP_LOOP_LOCKED( fxMesa )
+
+#define BEGIN_CLIP_LOOP_LOCKED(fxMesa)				\
+  do {								\
+    int _nc = fxMesa->numClipRects;				\
+    while (_nc--) {						\
+      if (fxMesa->numClipRects > 1) {				\
+        int _height = fxMesa->screen_height;			\
+        fxMesa->Glide.grClipWindow(fxMesa->pClipRects[_nc].x1,	\
+                     _height - fxMesa->pClipRects[_nc].y2,	\
+                     fxMesa->pClipRects[_nc].x2,		\
+                     _height - fxMesa->pClipRects[_nc].y1);	\
+      }
+
+
+#define END_CLIP_LOOP_LOCKED( fxMesa )		\
+    }						\
+  } while (0)
+
+#define END_CLIP_LOOP( fxMesa )			\
+    END_CLIP_LOOP_LOCKED( fxMesa );		\
+    UNLOCK_HARDWARE( fxMesa );			\
+  } while (0)
+
+
+#endif /* GLX_DIRECT_RENDERING */
+
+#endif /* __TDFX_LOCK_H__ */
-- 
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