patch-2.4.23 linux-2.4.23/drivers/char/drm/drm_os_linux.h

• Lines: 57
• Date: 2003-11-28 10:26:20.000000000 -0800
• Orig file: linux-2.4.22/drivers/char/drm/drm_os_linux.h
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.22/drivers/char/drm/drm_os_linux.h linux-2.4.23/drivers/char/drm/drm_os_linux.h
@@ -0,0 +1,56 @@
+#define __NO_VERSION__
+
+#include <linux/interrupt.h>	/* For task queue support */
+#include <linux/delay.h>
+
+
+/* For data going from/to the kernel through the ioctl argument */
+#define DRM_COPY_FROM_USER_IOCTL(arg1, arg2, arg3)	\
+	if ( copy_from_user(&arg1, arg2, arg3) )	\
+		return -EFAULT
+#define DRM_COPY_TO_USER_IOCTL(arg1, arg2, arg3)	\
+	if ( copy_to_user(arg1, &arg2, arg3) )		\
+		return -EFAULT
+
+
+#warning the author of this code needs to read up on list_entry
+#define DRM_GETSAREA()							 \
+do { 									 \
+	struct list_head *list;						 \
+	list_for_each( list, &dev->maplist->head ) {			 \
+		drm_map_list_t *entry = (drm_map_list_t *)list;		 \
+		if ( entry->map &&					 \
+		     entry->map->type == _DRM_SHM &&			 \
+		     (entry->map->flags & _DRM_CONTAINS_LOCK) ) {	 \
+			dev_priv->sarea = entry->map;			 \
+ 			break;						 \
+ 		}							 \
+ 	}								 \
+} while (0)
+
+#define DRM_WAIT_ON( ret, queue, timeout, condition )	\
+do {							\
+	DECLARE_WAITQUEUE(entry, current);		\
+	unsigned long end = jiffies + (timeout);	\
+	add_wait_queue(&(queue), &entry);		\
+							\
+	for (;;) {					\
+		set_current_state(TASK_INTERRUPTIBLE);	\
+		if (condition) 				\
+			break;				\
+		if((signed)(end - jiffies) <= 0) {	\
+			ret = -EBUSY;			\
+			break;				\
+		}					\
+		schedule_timeout((HZ/100 > 1) ? HZ/100 : 1);	\
+		if (signal_pending(current)) {		\
+			ret = -EINTR;			\
+			break;				\
+		}					\
+	}						\
+	set_current_state(TASK_RUNNING);		\
+	remove_wait_queue(&(queue), &entry);		\
+} while (0)
+
+
+