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

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