src/mesa/drivers/dri/ffb/ffb_lock.h

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/ffb/ffb_lock.h,v 1.2 2002/02/22 21:32:59 dawes Exp $ */
   2
   3 #ifndef _FFB_LOCK_H
   4 #define _FFB_LOCK_H
   5
   6 #include "ffb_context.h"
   7
   8 extern void ffbXMesaUpdateState(ffbContextPtr fmesa);
   9 #define FFB_UPDATE_STATE(fmesa) ffbXMesaUpdateState(fmesa)
  10
  11 /* Lock the hardware and validate our state.  This hardware can only ever
  12  * exist on SPARC platforms.  Don't bother building the real LOCK_HARDWARE and
  13  * UNLOCK_HARDWARE code on non-SPARC platforms.  The only reason the driver
  14  * gets built on non-SPARC is to catch build breakages earlier.
  15  */
  16 #if !defined(__sparc__)
  17 #define LOCK_HARDWARE(fmesa)
  18 #define UNLOCK_HARDWARE(fmesa)
  19 #else
  20 #define LOCK_HARDWARE(fmesa)                            \
  21   do {                                                  \
  22     DRM_CAS_RESULT(__ret);                              \
  23     DRM_CAS(fmesa->driHwLock, fmesa->hHWContext,        \
  24             (DRM_LOCK_HELD | fmesa->hHWContext), __ret);\
  25     if (__ret) {                                        \
  26         drmGetLock(fmesa->driFd, fmesa->hHWContext, 0); \
  27         FFB_UPDATE_STATE(fmesa);                        \
  28     }                                                   \
  29   } while (0)
  30
  31
  32 /* Unlock the hardware. */
  33 #define UNLOCK_HARDWARE(fmesa)                                  \
  34     DRM_UNLOCK(fmesa->driFd, fmesa->driHwLock, fmesa->hHWContext);
  35 #endif
  36
  37 #endif /* !(_FFB_LOCK_H) */