src/mesa/drivers/dri/r128/r128_lock.h

   1 /* $XFree86: xc/lib/GL/mesa/src/drv/r128/r128_lock.h,v 1.4 2001/01/08 01:07:21 martin Exp $ */
   2 /**************************************************************************
   3
   4 Copyright 1999, 2000 ATI Technologies Inc. and Precision Insight, Inc.,
   5                                                Cedar Park, Texas.
   6 All Rights Reserved.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining a
   9 copy of this software and associated documentation files (the "Software"),
  10 to deal in the Software without restriction, including without limitation
  11 on the rights to use, copy, modify, merge, publish, distribute, sub
  12 license, and/or sell copies of the Software, and to permit persons to whom
  13 the Software is furnished to do so, subject to the following conditions:
  14
  15 The above copyright notice and this permission notice (including the next
  16 paragraph) shall be included in all copies or substantial portions of the
  17 Software.
  18
  19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21 FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22 ATI, PRECISION INSIGHT AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23 DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24 OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25 USE OR OTHER DEALINGS IN THE SOFTWARE.
  26
  27 **************************************************************************/
  28
  29 /*
  30  * Authors:
  31  *   Kevin E. Martin <martin@valinux.com>
  32  *   Gareth Hughes <gareth@valinux.com>
  33  *
  34  */
  35
  36 #ifndef __R128_LOCK_H__
  37 #define __R128_LOCK_H__
  38
  39 #ifdef GLX_DIRECT_RENDERING
  40
  41 extern void r128GetLock( r128ContextPtr 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 /* 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->driHwLock, rmesa->hHWContext,                     \
  94                (DRM_LOCK_HELD | rmesa->hHWContext), __ret );            \
  95       if ( __ret )                                                      \
  96          r128GetLock( rmesa, 0 );                                       \
  97       DEBUG_LOCK();                                                     \
  98    } while (0)
  99
 100 /* Unlock the hardware.
 101  */
 102 #define UNLOCK_HARDWARE( rmesa )                                        \
 103    do {                                                                 \
 104       DRM_UNLOCK( rmesa->driFd,                                         \
 105                   rmesa->driHwLock,                                     \
 106                   rmesa->hHWContext );                                  \
 107       DEBUG_RESET();                                                    \
 108    } while (0)
 109
 110 #endif
 111 #endif /* __R128_LOCK_H__ */