src/mesa/drivers/dri/radeon/radeon_lock.h

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/radeon/radeon_lock.h,v 1.3 2002/10/30 12:51:55 alanh Exp $ */
   2 /**************************************************************************
   3
   4 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   5                      VA Linux Systems Inc., Fremont, California.
   6
   7 All Rights Reserved.
   8
   9 Permission is hereby granted, free of charge, to any person obtaining
  10 a copy of this software and associated documentation files (the
  11 "Software"), to deal in the Software without restriction, including
  12 without limitation the rights to use, copy, modify, merge, publish,
  13 distribute, sublicense, and/or sell copies of the Software, and to
  14 permit persons to whom the Software is furnished to do so, subject to
  15 the following conditions:
  16
  17 The above copyright notice and this permission notice (including the
  18 next paragraph) shall be included in all copies or substantial
  19 portions of the Software.
  20
  21 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  22 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  23 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  24 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  25 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  26 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  27 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  28
  29 **************************************************************************/
  30
  31 /*
  32  * Authors:
  33  *   Kevin E. Martin <martin@valinux.com>
  34  *   Gareth Hughes <gareth@valinux.com>
  35  */
  36
  37 #ifndef __RADEON_LOCK_H__
  38 #define __RADEON_LOCK_H__
  39
  40 extern void radeonGetLock( radeonContextPtr rmesa, GLuint flags );
  41
  42 /* Turn DEBUG_LOCKING on to find locking conflicts.
  43  */
  44 #define DEBUG_LOCKING   0
  45
  46 #if DEBUG_LOCKING
  47 extern char *prevLockFile;
  48 extern int prevLockLine;
  49
  50 #define DEBUG_LOCK()                                                    \
  51    do {                                                                 \
  52       prevLockFile = (__FILE__);                                        \
  53       prevLockLine = (__LINE__);                                        \
  54    } while (0)
  55
  56 #define DEBUG_RESET()                                                   \
  57    do {                                                                 \
  58       prevLockFile = 0;                                                 \
  59       prevLockLine = 0;                                                 \
  60    } while (0)
  61
  62 #define DEBUG_CHECK_LOCK()                                              \
  63    do {                                                                 \
  64       if ( prevLockFile ) {                                             \
  65          fprintf( stderr,                                               \
  66                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
  67                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  68          exit( 1 );                                                     \
  69       }                                                                 \
  70    } while (0)
  71
  72 #else
  73
  74 #define DEBUG_LOCK()
  75 #define DEBUG_RESET()
  76 #define DEBUG_CHECK_LOCK()
  77
  78 #endif
  79
  80 /*
  81  * !!! We may want to separate locks from locks with validation.  This
  82  * could be used to improve performance for those things commands that
  83  * do not do any drawing !!!
  84  */
  85
  86
  87 /* Lock the hardware and validate our state.
  88  */
  89 #define LOCK_HARDWARE( rmesa )                                  \
  90    do {                                                         \
  91       char __ret = 0;                                           \
  92       DEBUG_CHECK_LOCK();                                       \
  93       DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext,         \
  94                (DRM_LOCK_HELD | rmesa->dri.hwContext), __ret ); \
  95       if ( __ret )                                              \
  96          radeonGetLock( rmesa, 0 );                             \
  97       DEBUG_LOCK();                                             \
  98    } while (0)
  99
 100 #define UNLOCK_HARDWARE( rmesa )                                        \
 101    do {                                                                 \
 102       DRM_UNLOCK( rmesa->dri.fd,                                        \
 103                   rmesa->dri.hwLock,                                    \
 104                   rmesa->dri.hwContext );                               \
 105       DEBUG_RESET();                                                    \
 106    } while (0)
 107
 108 #endif /* __RADEON_LOCK_H__ */