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

   1 /**************************************************************************
   2
   3 Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
   4                      VA Linux Systems Inc., Fremont, California.
   5 Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
   6
   7 The Weather Channel (TM) funded Tungsten Graphics to develop the
   8 initial release of the Radeon 8500 driver under the XFree86 license.
   9 This notice must be preserved.
  10
  11 All Rights Reserved.
  12
  13 Permission is hereby granted, free of charge, to any person obtaining
  14 a copy of this software and associated documentation files (the
  15 "Software"), to deal in the Software without restriction, including
  16 without limitation the rights to use, copy, modify, merge, publish,
  17 distribute, sublicense, and/or sell copies of the Software, and to
  18 permit persons to whom the Software is furnished to do so, subject to
  19 the following conditions:
  20
  21 The above copyright notice and this permission notice (including the
  22 next paragraph) shall be included in all copies or substantial
  23 portions of the Software.
  24
  25 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  26 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  27 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
  28 IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
  29 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  30 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  31 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  32
  33 **************************************************************************/
  34
  35 /*
  36  * Authors:
  37  *   Gareth Hughes <gareth@valinux.com>
  38  *   Keith Whitwell <keith@tungstengraphics.com>
  39  *   Kevin E. Martin <martin@valinux.com>
  40  */
  41
  42 #ifndef COMMON_LOCK_H
  43 #define COMMON_LOCK_H
  44
  45 #include "main/colormac.h"
  46 #include "radeon_screen.h"
  47 #include "radeon_common.h"
  48
  49 extern void radeonGetLock(radeonContextPtr rmesa, GLuint flags);
  50
  51 /* Turn DEBUG_LOCKING on to find locking conflicts.
  52  */
  53 #define DEBUG_LOCKING   0
  54
  55 #if DEBUG_LOCKING
  56 extern char *prevLockFile;
  57 extern int prevLockLine;
  58
  59 #define DEBUG_LOCK()                                                    \
  60    do {                                                                 \
  61       prevLockFile = (__FILE__);                                        \
  62       prevLockLine = (__LINE__);                                        \
  63    } while (0)
  64
  65 #define DEBUG_RESET()                                                   \
  66    do {                                                                 \
  67       prevLockFile = 0;                                                 \
  68       prevLockLine = 0;                                                 \
  69    } while (0)
  70
  71 #define DEBUG_CHECK_LOCK()                                              \
  72    do {                                                                 \
  73       if ( prevLockFile ) {                                             \
  74          fprintf( stderr,                                               \
  75                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
  76                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  77          exit( 1 );                                                     \
  78       }                                                                 \
  79    } while (0)
  80
  81 #else
  82
  83 #define DEBUG_LOCK()
  84 #define DEBUG_RESET()
  85 #define DEBUG_CHECK_LOCK()
  86
  87 #endif
  88
  89 /*
  90  * !!! We may want to separate locks from locks with validation.  This
  91  * could be used to improve performance for those things commands that
  92  * do not do any drawing !!!
  93  */
  94
  95 /* Lock the hardware and validate our state.
  96  */
  97 #define LOCK_HARDWARE( rmesa )                                  \
  98    do {                                                         \
  99       char __ret = 0;                                           \
 100       DEBUG_CHECK_LOCK();                                       \
 101       if (!(rmesa)->radeonScreen->driScreen->dri2.enabled) {            \
 102         DRM_CAS( (rmesa)->dri.hwLock, (rmesa)->dri.hwContext,           \
 103                  (DRM_LOCK_HELD | (rmesa)->dri.hwContext), __ret );     \
 104         if ( __ret )                                                    \
 105           radeonGetLock( (rmesa), 0 );                                  \
 106       }                                                                 \
 107       DEBUG_LOCK();                                                     \
 108    } while (0)
 109
 110 #define UNLOCK_HARDWARE( rmesa )                                        \
 111    do {                                                                 \
 112      if (!(rmesa)->radeonScreen->driScreen->dri2.enabled) {             \
 113        DRM_UNLOCK( (rmesa)->dri.fd,                                     \
 114                    (rmesa)->dri.hwLock,                                 \
 115                    (rmesa)->dri.hwContext );                            \
 116        DEBUG_RESET();                                                   \
 117      }                                                                  \
 118    } while (0)
 119
 120 #endif