src/mesa/drivers/dri/tdfx/tdfx_lock.h

   1 /* -*- mode: c; c-basic-offset: 3 -*-
   2  *
   3  * Copyright 2000 VA Linux Systems Inc., Fremont, California.
   4  *
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the next
  15  * paragraph) shall be included in all copies or substantial portions of the
  16  * Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  19  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  20  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  21  * VA LINUX SYSTEMS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
  22  * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
  23  * OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  24  * SOFTWARE.
  25  */
  26 /* $XFree86: xc/lib/GL/mesa/src/drv/tdfx/tdfx_lock.h,v 1.3 2002/02/22 21:45:03 dawes Exp $ */
  27
  28 /*
  29  * Original rewrite:
  30  *      Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
  31  *
  32  * Authors:
  33  *      Gareth Hughes <gareth@valinux.com>
  34  *
  35  */
  36
  37 #ifndef __TDFX_LOCK_H__
  38 #define __TDFX_LOCK_H__
  39
  40 #ifdef GLX_DIRECT_RENDERING
  41
  42 /* You can turn this 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 /* DEBUG_LOCKING */
  79
  80
  81 extern void tdfxGetLock( tdfxContextPtr fxMesa );
  82
  83
  84 /* !!! We may want to separate locks from locks with validation.
  85    This could be used to improve performance for those things
  86    commands that do not do any drawing !!! */
  87
  88 #define DRM_LIGHT_LOCK_RETURN(fd,lock,context,__ret)                   \
  89         do {                                                           \
  90                 DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
  91                 if (__ret) drmGetLock(fd,context,0);                   \
  92         } while(0)
  93
  94 #define LOCK_HARDWARE( fxMesa )                                         \
  95    do {                                                                 \
  96       char __ret = 0;                                                   \
  97                                                                         \
  98       DEBUG_CHECK_LOCK();                                               \
  99       DRM_CAS( fxMesa->driHwLock, fxMesa->hHWContext,                   \
 100               DRM_LOCK_HELD | fxMesa->hHWContext, __ret );              \
 101       if ( __ret ) {                                                    \
 102          tdfxGetLock( fxMesa );                                         \
 103       }                                                                 \
 104       DEBUG_LOCK();                                                     \
 105    } while (0)
 106
 107 /* Unlock the hardware using the global current context */
 108 #define UNLOCK_HARDWARE( fxMesa )                                       \
 109   do {                                                                  \
 110     DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext ); \
 111     DEBUG_RESET();                                                      \
 112   } while (0)
 113
 114 /*
 115  * This pair of macros makes a loop over the drawing operations
 116  * so it is not self contained and doesn't have the nice single
 117  * statement semantics of most macros.
 118  */
 119 #define BEGIN_CLIP_LOOP(fxMesa)                 \
 120   do {                                          \
 121     LOCK_HARDWARE( fxMesa );                    \
 122     BEGIN_CLIP_LOOP_LOCKED( fxMesa )
 123
 124 #define BEGIN_CLIP_LOOP_LOCKED(fxMesa)                          \
 125   do {                                                          \
 126     int _nc = fxMesa->numClipRects;                             \
 127     while (_nc--) {                                             \
 128       if (fxMesa->numClipRects > 1) {                           \
 129         int _height = fxMesa->screen_height;                    \
 130         fxMesa->Glide.grClipWindow(fxMesa->pClipRects[_nc].x1,  \
 131                      _height - fxMesa->pClipRects[_nc].y2,      \
 132                      fxMesa->pClipRects[_nc].x2,                \
 133                      _height - fxMesa->pClipRects[_nc].y1);     \
 134       }
 135
 136
 137 #define END_CLIP_LOOP_LOCKED( fxMesa )          \
 138     }                                           \
 139   } while (0)
 140
 141 #define END_CLIP_LOOP( fxMesa )                 \
 142     END_CLIP_LOOP_LOCKED( fxMesa );             \
 143     UNLOCK_HARDWARE( fxMesa );                  \
 144   } while (0)
 145
 146
 147 #endif /* GLX_DIRECT_RENDERING */
 148
 149 #endif /* __TDFX_LOCK_H__ */