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 /* You can turn this 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 /* DEBUG_LOCKING */
  77
  78
  79 extern void tdfxGetLock( tdfxContextPtr fxMesa );
  80
  81
  82 /* !!! We may want to separate locks from locks with validation.
  83    This could be used to improve performance for those things
  84    commands that do not do any drawing !!! */
  85
  86 #define DRM_LIGHT_LOCK_RETURN(fd,lock,context,__ret)                   \
  87         do {                                                           \
  88                 DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
  89                 if (__ret) drmGetLock(fd,context,0);                   \
  90         } while(0)
  91
  92 #define LOCK_HARDWARE( fxMesa )                                         \
  93    do {                                                                 \
  94       char __ret = 0;                                                   \
  95                                                                         \
  96       DEBUG_CHECK_LOCK();                                               \
  97       DRM_CAS( fxMesa->driHwLock, fxMesa->hHWContext,                   \
  98               DRM_LOCK_HELD | fxMesa->hHWContext, __ret );              \
  99       if ( __ret ) {                                                    \
 100          tdfxGetLock( fxMesa );                                         \
 101       }                                                                 \
 102       DEBUG_LOCK();                                                     \
 103    } while (0)
 104
 105 /* Unlock the hardware using the global current context */
 106 #define UNLOCK_HARDWARE( fxMesa )                                       \
 107   do {                                                                  \
 108     DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext ); \
 109     DEBUG_RESET();                                                      \
 110   } while (0)
 111
 112 /*
 113  * This pair of macros makes a loop over the drawing operations
 114  * so it is not self contained and doesn't have the nice single
 115  * statement semantics of most macros.
 116  */
 117 #define BEGIN_CLIP_LOOP(fxMesa)                 \
 118   do {                                          \
 119     LOCK_HARDWARE( fxMesa );                    \
 120     BEGIN_CLIP_LOOP_LOCKED( fxMesa )
 121
 122 #define BEGIN_CLIP_LOOP_LOCKED(fxMesa)                          \
 123   do {                                                          \
 124     int _nc = fxMesa->numClipRects;                             \
 125     while (_nc--) {                                             \
 126       if (fxMesa->numClipRects > 1) {                           \
 127         int _height = fxMesa->screen_height;                    \
 128         fxMesa->Glide.grClipWindow(fxMesa->pClipRects[_nc].x1,  \
 129                      _height - fxMesa->pClipRects[_nc].y2,      \
 130                      fxMesa->pClipRects[_nc].x2,                \
 131                      _height - fxMesa->pClipRects[_nc].y1);     \
 132       }
 133
 134
 135 #define END_CLIP_LOOP_LOCKED( fxMesa )          \
 136     }                                           \
 137   } while (0)
 138
 139 #define END_CLIP_LOOP( fxMesa )                 \
 140     END_CLIP_LOOP_LOCKED( fxMesa );             \
 141     UNLOCK_HARDWARE( fxMesa );                  \
 142   } while (0)
 143
 144 #endif /* __TDFX_LOCK_H__ */