From 11351f0c8a88ae84ec397c7f9abb4a83c64b2cfc Mon Sep 17 00:00:00 2001 From: Thomas Hellstrom Date: Tue, 20 Jan 2009 11:07:10 +0100 Subject: dri1: Add a macro to validate two dri drawables in one go. Dri drivers often may validate first a write drawable and then a read drawable ("readable"). However, the hardware lock may be unlocked when validating the readable, causing the write drawable status to be stale. Drivers should use this macro instead when validating two drawables. --- src/mesa/drivers/dri/common/dri_util.h | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+) (limited to 'src/mesa/drivers/dri') diff --git a/src/mesa/drivers/dri/common/dri_util.h b/src/mesa/drivers/dri/common/dri_util.h index c0e1bea5e0..c6781f1c7a 100644 --- a/src/mesa/drivers/dri/common/dri_util.h +++ b/src/mesa/drivers/dri/common/dri_util.h @@ -108,6 +108,28 @@ do { \ } \ } while (0) +/** + * Same as above, but for two drawables simultaneously. + * + */ + +#define DRI_VALIDATE_TWO_DRAWABLES_INFO(psp, pdp, prp) \ +do { \ + while (*((pdp)->pStamp) != (pdp)->lastStamp || \ + *((prp)->pStamp) != (prp)->lastStamp) { \ + register unsigned int hwContext = (psp)->pSAREA->lock.lock & \ + ~(DRM_LOCK_HELD | DRM_LOCK_CONT); \ + DRM_UNLOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \ + \ + DRM_SPINLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \ + DRI_VALIDATE_DRAWABLE_INFO_ONCE(pdp); \ + DRI_VALIDATE_DRAWABLE_INFO_ONCE(prp); \ + DRM_SPINUNLOCK(&(psp)->pSAREA->drawable_lock, (psp)->drawLockID); \ + \ + DRM_LIGHT_LOCK((psp)->fd, &(psp)->pSAREA->lock, hwContext); \ + } \ +} while (0) + /** * Driver callback functions. -- cgit v1.2.3