src/mesa/drivers/dri/s3v/s3v_lock.h

   1 /*
   2  * Author: Max Lingua <sunmax@libero.it>
   3  */
   4
   5 #ifndef __S3V_LOCK_H__
   6 #define __S3V_LOCK_H__
   7
   8 #include <sys/ioctl.h>
   9
  10 extern void s3vGetLock( s3vContextPtr vmesa, GLuint flags );
  11
  12 /* Turn DEBUG_LOCKING on to find locking conflicts.
  13  */
  14 #define DEBUG_LOCKING   0
  15
  16 #if DEBUG_LOCKING
  17 extern char *prevLockFile;
  18 extern int prevLockLine;
  19
  20 #define DEBUG_LOCK() \
  21    do { \
  22       prevLockFile = (__FILE__); \
  23       prevLockLine = (__LINE__); \
  24    } while (0)
  25
  26 #define DEBUG_RESET() \
  27    do { \
  28       prevLockFile = 0; \
  29       prevLockLine = 0; \
  30    } while (0)
  31
  32 #define DEBUG_CHECK_LOCK() \
  33    do { \
  34       if ( prevLockFile ) { \
  35          fprintf( stderr, \
  36                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n", \
  37                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  38          exit(1); \
  39       } \
  40    } while (0)
  41
  42 #else
  43
  44 #define DEBUG_LOCK()
  45 #define DEBUG_RESET()
  46 #define DEBUG_CHECK_LOCK()
  47
  48 #endif
  49
  50 /*
  51  * !!! We may want to separate locks from locks with validation.  This
  52  * could be used to improve performance for those things commands that
  53  * do not do any drawing !!!
  54  */
  55
  56 /* Lock the hardware and validate our state.
  57  */
  58 #define LOCK_HARDWARE( vmesa ) \
  59    do { \
  60       char __ret = 0; \
  61       DEBUG_CHECK_LOCK(); \
  62       DRM_CAS( vmesa->driHwLock, vmesa->hHWContext, \
  63                (DRM_LOCK_HELD | vmesa->hHWContext), __ret ); \
  64       if ( __ret ) \
  65          s3vGetLock( vmesa, 0 ); \
  66       DEBUG_LOCK(); \
  67    } while (0)
  68
  69 /* Unlock the hardware.
  70  */
  71 #define UNLOCK_HARDWARE( vmesa ) \
  72    do { \
  73       DRM_UNLOCK( vmesa->driFd, \
  74                   vmesa->driHwLock, \
  75                   vmesa->hHWContext ); \
  76       DEBUG_RESET(); \
  77    } while (0)
  78
  79 #define S3VHW_LOCK( vmesa )     \
  80    DRM_UNLOCK(vmesa->driFd, vmesa->driHwLock, vmesa->hHWContext); \
  81    DRM_SPINLOCK(&vmesa->driScreen->pSAREA->drawable_lock, \
  82                  vmesa->driScreen->drawLockID); \
  83    /* VALIDATE_DRAWABLE_INFO_NO_LOCK(vmesa); */
  84
  85 #define S3VHW_UNLOCK( vmesa ) \
  86     DRM_SPINUNLOCK(&vmesa->driScreen->pSAREA->drawable_lock, \
  87                    vmesa->driScreen->drawLockID); \
  88     /* VALIDATE_DRAWABLE_INFO_NO_LOCK_POST(vmesa); */
  89
  90 #define S3V_SIMPLE_LOCK( vmesa ) \
  91         ioctl(vmesa->driFd, 0x4a)
  92
  93 #define S3V_SIMPLE_FLUSH_LOCK( vmesa ) \
  94         ioctl(vmesa->driFd, 0x4b)
  95
  96 #define S3V_SIMPLE_UNLOCK( vmesa ) \
  97         ioctl(vmesa->driFd, 0x4c)
  98
  99 #endif /* __S3V_LOCK_H__ */