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Viewing changes to src/mesa/drivers/dri/r200/r200_lock.h

  • Committer: Bazaar Package Importer
  • Author(s): Morten Kjeldgaard
  • Date: 2008-05-06 16:19:15 UTC
  • Revision ID: james.westby@ubuntu.com-20080506161915-uynz7nftmfixu6bq
Tags: upstream-7.0.3
Import upstream version 7.0.3

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src/mesa/drivers/dri/r200/r200_lock.h
 
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/* $XFree86: xc/lib/GL/mesa/src/drv/r200/r200_lock.h,v 1.1 2002/10/30 12:51:52 alanh Exp $ */
 
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/*
 
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Copyright (C) The Weather Channel, Inc.  2002.  All Rights Reserved.
 
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The Weather Channel (TM) funded Tungsten Graphics to develop the
 
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initial release of the Radeon 8500 driver under the XFree86 license.
 
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This notice must be preserved.
 
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Permission is hereby granted, free of charge, to any person obtaining
 
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a copy of this software and associated documentation files (the
 
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"Software"), to deal in the Software without restriction, including
 
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without limitation the rights to use, copy, modify, merge, publish,
 
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distribute, sublicense, and/or sell copies of the Software, and to
 
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permit persons to whom the Software is furnished to do so, subject to
 
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the following conditions:
 
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The above copyright notice and this permission notice (including the
 
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next paragraph) shall be included in all copies or substantial
 
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portions of the Software.
 
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
 
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IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
 
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
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**************************************************************************/
 
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/*
 
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 * Authors:
 
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 *   Keith Whitwell <keith@tungstengraphics.com>
 
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 */
 
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#ifndef __R200_LOCK_H__
 
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#define __R200_LOCK_H__
 
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extern void r200GetLock( r200ContextPtr rmesa, GLuint flags );
 
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/* Turn DEBUG_LOCKING on to find locking conflicts.
 
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 */
 
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#define DEBUG_LOCKING   0
 
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#if DEBUG_LOCKING
 
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extern char *prevLockFile;
 
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extern int prevLockLine;
 
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#define DEBUG_LOCK()                                                    \
 
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   do {                                                                 \
 
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      prevLockFile = (__FILE__);                                        \
 
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      prevLockLine = (__LINE__);                                        \
 
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   } while (0)
 
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#define DEBUG_RESET()                                                   \
 
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   do {                                                                 \
 
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      prevLockFile = 0;                                                 \
 
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      prevLockLine = 0;                                                 \
 
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   } while (0)
 
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#define DEBUG_CHECK_LOCK()                                              \
 
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   do {                                                                 \
 
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      if ( prevLockFile ) {                                             \
 
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         fprintf( stderr,                                               \
 
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                  "LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n",    \
 
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                  prevLockFile, prevLockLine, __FILE__, __LINE__ );     \
 
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         exit( 1 );                                                     \
 
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      }                                                                 \
 
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   } while (0)
 
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#else
 
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#define DEBUG_LOCK()
 
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#define DEBUG_RESET()
 
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#define DEBUG_CHECK_LOCK()
 
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#endif
 
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/*
 
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 * !!! We may want to separate locks from locks with validation.  This
 
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 * could be used to improve performance for those things commands that
 
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 * do not do any drawing !!!
 
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 */
 
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/* Lock the hardware and validate our state.
 
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 */
 
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#define LOCK_HARDWARE( rmesa )                                  \
 
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   do {                                                         \
 
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      char __ret = 0;                                           \
 
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      DEBUG_CHECK_LOCK();                                       \
 
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      DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext,         \
 
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               (DRM_LOCK_HELD | rmesa->dri.hwContext), __ret ); \
 
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      if ( __ret )                                              \
 
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         r200GetLock( rmesa, 0 );                               \
 
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      DEBUG_LOCK();                                             \
 
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   } while (0)
 
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#define UNLOCK_HARDWARE( rmesa )                                        \
 
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   do {                                                                 \
 
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      DRM_UNLOCK( rmesa->dri.fd,                                        \
 
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                  rmesa->dri.hwLock,                                    \
 
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                  rmesa->dri.hwContext );                               \
 
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      DEBUG_RESET();                                                    \
 
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   } while (0)
 
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#endif /* __R200_LOCK_H__ */