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Viewing changes to unix/xc/lib/GL/mesa/src/drv/radeon/radeon_lock.h

  • Committer: Bazaar Package Importer
  • Author(s): Ola Lundqvist
  • Date: 2006-05-15 20:35:17 UTC
  • mfrom: (1.1.2 upstream)
  • Revision ID: james.westby@ubuntu.com-20060515203517-l4lre1ku942mn26k
Tags: 4.1.1+X4.3.0-10
* Correction of critical security issue. Thanks to Martin Kogler
  <e9925248@student.tuwien.ac.at> that informed me about the issue,
  and provided the patch.
  This flaw was originally found by Steve Wiseman of intelliadmin.com.
* Applied patch from Javier Kohen <jkohen@users.sourceforge.net> that
  inform the user that only 8 first characters of the password will
  actually be used when typing more than 8 characters, closes:
  #355619.

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unix/xc/lib/GL/mesa/src/drv/radeon/radeon_lock.h
 
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/* $XFree86: xc/lib/GL/mesa/src/drv/radeon/radeon_lock.h,v 1.3 2002/10/30 12:51:55 alanh Exp $ */
 
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/**************************************************************************
 
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Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
 
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                     VA Linux Systems Inc., Fremont, California.
 
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All Rights Reserved.
 
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Permission is hereby granted, free of charge, to any person obtaining a
 
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copy of this software and associated documentation files (the "Software"),
 
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to deal in the Software without restriction, including without limitation
 
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on the rights to use, copy, modify, merge, publish, distribute, sub
 
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license, and/or sell copies of the Software, and to permit persons to whom
 
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the Software is furnished to do so, subject to the following conditions:
 
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The above copyright notice and this permission notice (including the next
 
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paragraph) shall be included in all copies or substantial portions of the
 
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Software.
 
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 
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FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
 
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ATI, VA LINUX SYSTEMS AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
 
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
 
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OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 
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USE OR OTHER DEALINGS IN THE SOFTWARE.
 
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**************************************************************************/
 
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/*
 
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 * Authors:
 
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 *   Kevin E. Martin <martin@valinux.com>
 
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 *   Gareth Hughes <gareth@valinux.com>
 
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 *
 
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 */
 
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#ifndef __RADEON_LOCK_H__
 
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#define __RADEON_LOCK_H__
 
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#ifdef GLX_DIRECT_RENDERING
 
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extern void radeonGetLock( radeonContextPtr 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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         radeonGetLock( rmesa, 0 );                             \
 
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      DEBUG_LOCK();                                             \
 
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   } while (0)
 
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/* Unlock the hardware.
 
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 */
 
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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
 
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#endif /* __RADEON_LOCK_H__ */