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
  27 /*
  28  * Original rewrite:
  29  *      Gareth Hughes <gareth@valinux.com>, 29 Sep - 1 Oct 2000
  30  *
  31  * Authors:
  32  *      Gareth Hughes <gareth@valinux.com>
  33  *
  34  */
  35
  36 #ifndef __TDFX_LOCK_H__
  37 #define __TDFX_LOCK_H__
  38
  39 /* You can turn this on to find locking conflicts.
  40  */
  41 #define DEBUG_LOCKING           0
  42
  43 #if DEBUG_LOCKING
  44 extern char *prevLockFile;
  45 extern int prevLockLine;
  46
  47 #define DEBUG_LOCK()                                                    \
  48    do {                                                                 \
  49       prevLockFile = (__FILE__);                                        \
  50       prevLockLine = (__LINE__);                                        \
  51    } while (0)
  52
  53 #define DEBUG_RESET()                                                   \
  54    do {                                                                 \
  55       prevLockFile = 0;                                                 \
  56       prevLockLine = 0;                                                 \
  57    } while (0)
  58
  59 #define DEBUG_CHECK_LOCK()                                              \
  60    do {                                                                 \
  61       if ( prevLockFile ) {                                             \
  62          fprintf( stderr,                                               \
  63                   "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
  64                   prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
  65          exit( 1 );                                                     \
  66       }                                                                 \
  67    } while (0)
  68
  69 #else
  70
  71 #define DEBUG_LOCK()
  72 #define DEBUG_RESET()
  73 #define DEBUG_CHECK_LOCK()
  74
  75 #endif /* DEBUG_LOCKING */
  76
  77
  78 extern void tdfxGetLock( tdfxContextPtr fxMesa );
  79
  80
  81 /* !!! We may want to separate locks from locks with validation.
  82    This could be used to improve performance for those things
  83    commands that do not do any drawing !!! */
  84
  85 #define DRM_LIGHT_LOCK_RETURN(fd,lock,context,__ret)                   \
  86         do {                                                           \
  87                 DRM_CAS(lock,context,DRM_LOCK_HELD|context,__ret);     \
  88                 if (__ret) drmGetLock(fd,context,0);                   \
  89         } while(0)
  90
  91 #define LOCK_HARDWARE( fxMesa )                                         \
  92    do {                                                                 \
  93       char __ret = 0;                                                   \
  94                                                                         \
  95       DEBUG_CHECK_LOCK();                                               \
  96       DRM_CAS( fxMesa->driHwLock, fxMesa->hHWContext,                   \
  97               DRM_LOCK_HELD | fxMesa->hHWContext, __ret );              \
  98       if ( __ret ) {                                                    \
  99          tdfxGetLock( fxMesa );                                         \
 100       }                                                                 \
 101       DEBUG_LOCK();                                                     \
 102    } while (0)
 103
 104 /* Unlock the hardware using the global current context */
 105 #define UNLOCK_HARDWARE( fxMesa )                                       \
 106   do {                                                                  \
 107     DRM_UNLOCK( fxMesa->driFd, fxMesa->driHwLock, fxMesa->hHWContext ); \
 108     DEBUG_RESET();                                                      \
 109   } while (0)
 110
 111 /*
 112  * This pair of macros makes a loop over the drawing operations
 113  * so it is not self contained and doesn't have the nice single
 114  * statement semantics of most macros.
 115  */
 116 #define BEGIN_CLIP_LOOP(fxMesa)                 \
 117   do {                                          \
 118     LOCK_HARDWARE( fxMesa );                    \
 119     BEGIN_CLIP_LOOP_LOCKED( fxMesa )
 120
 121 #define BEGIN_CLIP_LOOP_LOCKED(fxMesa)                          \
 122   do {                                                          \
 123     int _nc = fxMesa->numClipRects;                             \
 124     while (_nc--) {                                             \
 125       if (fxMesa->numClipRects > 1) {                           \
 126         int _height = fxMesa->screen_height;                    \
 127         fxMesa->Glide.grClipWindow(fxMesa->pClipRects[_nc].x1,  \
 128                      _height - fxMesa->pClipRects[_nc].y2,      \
 129                      fxMesa->pClipRects[_nc].x2,                \
 130                      _height - fxMesa->pClipRects[_nc].y1);     \
 131       }
 132
 133
 134 #define END_CLIP_LOOP_LOCKED( fxMesa )          \
 135     }                                           \
 136   } while (0)
 137
 138 #define END_CLIP_LOOP( fxMesa )                 \
 139     END_CLIP_LOOP_LOCKED( fxMesa );             \
 140     UNLOCK_HARDWARE( fxMesa );                  \
 141   } while (0)
 142
 143 #endif /* __TDFX_LOCK_H__ */