src/mesa/drivers/dri/r200/r200_lock.h

   1 /*
   2 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   3
   4 The Weather Channel (TM) funded Tungsten Graphics to develop the
   5 initial release of the Radeon 8500 driver under the XFree86 license.
   6 This notice must be preserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining
   9 a copy of this software and associated documentation files (the
  10 "Software"), to deal in the Software without restriction, including
  11 without limitation the rights to use, copy, modify, merge, publish,
  12 distribute, sublicense, and/or sell copies of the Software, and to
  13 permit persons to whom the Software is furnished to do so, subject to
  14 the following conditions:
  15
  16 The above copyright notice and this permission notice (including the
  17 next paragraph) shall be included in all copies or substantial
  18 portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  23 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27
  28 **************************************************************************/
  29
  30 /*
  31  * Authors:
  32  *   Keith Whitwell <keith@tungstengraphics.com>
  33  */
  34
  35 #ifndef __R200_LOCK_H__
  36 #define __R200_LOCK_H__
  37
  38 extern void r200GetLock( r200ContextPtr rmesa, GLuint flags );
  39
  40 /* Turn DEBUG_LOCKING on to find locking conflicts.
  41  */
  42 #define DEBUG_LOCKING   0
  43
  44 #if DEBUG_LOCKING
  45 extern char *prevLockFile;
  46 extern int prevLockLine;
  47
  48 #define DEBUG_LOCK()                                                    \
  49    do {                                                                 \
  50       prevLockFile = (__FILE__);                                        \
  51       prevLockLine = (__LINE__);                                        \
  52    } while (0)
  53
  54 #define DEBUG_RESET()                                                   \
  55    do {                                                                 \
  56       prevLockFile = 0;                                                 \
  57       prevLockLine = 0;                                                 \
  58    } while (0)
  59
  60 #define DEBUG_CHECK_LOCK()                                              \
  61    do {                                                                 \
  62       if ( prevLockFile ) {                                             \
  63          fprintf( stderr,                                               \
  64                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
  65                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  66          exit( 1 );                                                     \
  67       }                                                                 \
  68    } while (0)
  69
  70 #else
  71
  72 #define DEBUG_LOCK()
  73 #define DEBUG_RESET()
  74 #define DEBUG_CHECK_LOCK()
  75
  76 #endif
  77
  78 /*
  79  * !!! We may want to separate locks from locks with validation.  This
  80  * could be used to improve performance for those things commands that
  81  * do not do any drawing !!!
  82  */
  83
  84
  85 /* Lock the hardware and validate our state.
  86  */
  87 #define LOCK_HARDWARE( rmesa )                                  \
  88    do {                                                         \
  89       char __ret = 0;                                           \
  90       DEBUG_CHECK_LOCK();                                       \
  91       DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext,         \
  92                (DRM_LOCK_HELD | rmesa->dri.hwContext), __ret ); \
  93       if ( __ret )                                              \
  94          r200GetLock( rmesa, 0 );                               \
  95       DEBUG_LOCK();                                             \
  96    } while (0)
  97
  98 #define UNLOCK_HARDWARE( rmesa )                                        \
  99    do {                                                                 \
 100       DRM_UNLOCK( rmesa->dri.fd,                                        \
 101                   rmesa->dri.hwLock,                                    \
 102                   rmesa->dri.hwContext );                               \
 103       DEBUG_RESET();                                                    \
 104    } while (0)
 105
 106 #endif /* __R200_LOCK_H__ */