From c403bcb8a7be437976d5adce41189fff1e7f690f Mon Sep 17 00:00:00 2001
From: Adam Jackson <ajax@freedesktop.org>
Date: Thu, 16 Dec 2004 19:26:23 +0000
Subject: Import s3virge and trident drivers.  Not functional yet; no Makefile,
 no DRI-aware DDX.

---
 src/mesa/drivers/dri/s3v/s3v_lock.h | 103 ++++++++++++++++++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 src/mesa/drivers/dri/s3v/s3v_lock.h

(limited to 'src/mesa/drivers/dri/s3v/s3v_lock.h')

diff --git a/src/mesa/drivers/dri/s3v/s3v_lock.h b/src/mesa/drivers/dri/s3v/s3v_lock.h
new file mode 100644
index 0000000000..f1bb2a9bf2
--- /dev/null
+++ b/src/mesa/drivers/dri/s3v/s3v_lock.h
@@ -0,0 +1,103 @@
+/*
+ * Author: Max Lingua <sunmax@libero.it>
+ */
+
+#ifndef __S3V_LOCK_H__
+#define __S3V_LOCK_H__
+
+#include <sys/ioctl.h>
+
+#ifdef GLX_DIRECT_RENDERING
+
+extern void s3vGetLock( s3vContextPtr vmesa, 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( vmesa ) \
+   do {	\
+      char __ret = 0; \
+      DEBUG_CHECK_LOCK(); \
+      DRM_CAS( vmesa->driHwLock, vmesa->hHWContext, \
+	       (DRM_LOCK_HELD | vmesa->hHWContext), __ret ); \
+      if ( __ret ) \
+         s3vGetLock( vmesa, 0 ); \
+      DEBUG_LOCK(); \
+   } while (0)
+
+/* Unlock the hardware.
+ */
+#define UNLOCK_HARDWARE( vmesa ) \
+   do { \
+      DRM_UNLOCK( vmesa->driFd, \
+		  vmesa->driHwLock, \
+		  vmesa->hHWContext ); \
+      DEBUG_RESET(); \
+   } while (0)
+
+#endif
+
+#define S3VHW_LOCK( vmesa )	\
+   DRM_UNLOCK(vmesa->driFd, vmesa->driHwLock, vmesa->hHWContext); \
+   DRM_SPINLOCK(&vmesa->driScreen->pSAREA->drawable_lock, \
+		 vmesa->driScreen->drawLockID); \
+   /* VALIDATE_DRAWABLE_INFO_NO_LOCK(vmesa); */
+
+#define S3VHW_UNLOCK( vmesa ) \
+    DRM_SPINUNLOCK(&vmesa->driScreen->pSAREA->drawable_lock, \
+		   vmesa->driScreen->drawLockID); \
+    /* VALIDATE_DRAWABLE_INFO_NO_LOCK_POST(vmesa); */
+
+#define S3V_SIMPLE_LOCK( vmesa ) \
+	ioctl(vmesa->driFd, 0x4a) 
+
+#define S3V_SIMPLE_FLUSH_LOCK( vmesa ) \
+	ioctl(vmesa->driFd, 0x4b) 
+
+#define S3V_SIMPLE_UNLOCK( vmesa ) \
+	ioctl(vmesa->driFd, 0x4c) 
+
+#endif /* __S3V_LOCK_H__ */
-- 
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