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

   1 /* $XFree86$ */
   2 /**************************************************************************
   3 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   4
   5 The Weather Channel (TM) funded Tungsten Graphics to develop the
   6 initial release of the Radeon 8500 driver under the XFree86 license.
   7 This notice must be preserved.
   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  *   Keith Whitwell <keith@tungstengraphics.com>
  34  */
  35
  36 #ifndef __R200_LOCK_H__
  37 #define __R200_LOCK_H__
  38
  39 #ifdef GLX_DIRECT_RENDERING
  40
  41 extern void r200GetLock( r200ContextPtr rmesa, GLuint flags );
  42
  43 /* Turn DEBUG_LOCKING on to find locking conflicts.
  44  */
  45 #define DEBUG_LOCKING   0
  46
  47 #if DEBUG_LOCKING
  48 extern char *prevLockFile;
  49 extern int prevLockLine;
  50
  51 #define DEBUG_LOCK()                                                    \
  52    do {                                                                 \
  53       prevLockFile = (__FILE__);                                        \
  54       prevLockLine = (__LINE__);                                        \
  55    } while (0)
  56
  57 #define DEBUG_RESET()                                                   \
  58    do {                                                                 \
  59       prevLockFile = 0;                                                 \
  60       prevLockLine = 0;                                                 \
  61    } while (0)
  62
  63 #define DEBUG_CHECK_LOCK()                                              \
  64    do {                                                                 \
  65       if ( prevLockFile ) {                                             \
  66          fprintf( stderr,                                               \
  67                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
  68                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  69          exit( 1 );                                                     \
  70       }                                                                 \
  71    } while (0)
  72
  73 #else
  74
  75 #define DEBUG_LOCK()
  76 #define DEBUG_RESET()
  77 #define DEBUG_CHECK_LOCK()
  78
  79 #endif
  80
  81 /*
  82  * !!! We may want to separate locks from locks with validation.  This
  83  * could be used to improve performance for those things commands that
  84  * do not do any drawing !!!
  85  */
  86
  87
  88 /* Lock the hardware and validate our state.
  89  */
  90 #define LOCK_HARDWARE( rmesa )                                  \
  91    do {                                                         \
  92       char __ret = 0;                                           \
  93       DEBUG_CHECK_LOCK();                                       \
  94       DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext,         \
  95                (DRM_LOCK_HELD | rmesa->dri.hwContext), __ret ); \
  96       if ( __ret )                                              \
  97          r200GetLock( rmesa, 0 );                               \
  98       DEBUG_LOCK();                                             \
  99    } while (0)
 100
 101 /* Unlock the hardware.
 102  */
 103 #define UNLOCK_HARDWARE( rmesa )                                        \
 104    do {                                                                 \
 105       DRM_UNLOCK( rmesa->dri.fd,                                        \
 106                   rmesa->dri.hwLock,                                    \
 107                   rmesa->dri.hwContext );                               \
 108       DEBUG_RESET();                                                    \
 109    } while (0)
 110
 111 #endif
 112 #endif /* __R200_LOCK_H__ */