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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 $ */
/**************************************************************************
Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
VA Linux Systems Inc., Fremont, California.
All Rights Reserved.
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice (including the
next paragraph) shall be included in all copies or substantial
portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**************************************************************************/
/*
* Authors:
* Kevin E. Martin <martin@valinux.com>
* Gareth Hughes <gareth@valinux.com>
*/
#ifndef __RADEON_LOCK_H__
#define __RADEON_LOCK_H__
#ifdef GLX_DIRECT_RENDERING
extern void radeonGetLock( radeonContextPtr rmesa, GLuint flags );
/* Turn DEBUG_LOCKING on to find locking conflicts.
*/
#define DEBUG_LOCKING 0
#if DEBUG_LOCKING
extern char *prevLockFile;
extern int prevLockLine;
#define DEBUG_LOCK() \
do { \
prevLockFile = (__FILE__); \
prevLockLine = (__LINE__); \
} while (0)
#define DEBUG_RESET() \
do { \
prevLockFile = 0; \
prevLockLine = 0; \
} while (0)
#define DEBUG_CHECK_LOCK() \
do { \
if ( prevLockFile ) { \
fprintf( stderr, \
"LOCK SET!\n\tPrevious %s:%d\n\tCurrent: %s:%d\n", \
prevLockFile, prevLockLine, __FILE__, __LINE__ ); \
exit( 1 ); \
} \
} while (0)
#else
#define DEBUG_LOCK()
#define DEBUG_RESET()
#define DEBUG_CHECK_LOCK()
#endif
/*
* !!! We may want to separate locks from locks with validation. This
* could be used to improve performance for those things commands that
* do not do any drawing !!!
*/
/* Lock the hardware and validate our state.
*/
#define LOCK_HARDWARE( rmesa ) \
do { \
char __ret = 0; \
DEBUG_CHECK_LOCK(); \
DRM_CAS( rmesa->dri.hwLock, rmesa->dri.hwContext, \
(DRM_LOCK_HELD | rmesa->dri.hwContext), __ret ); \
if ( __ret ) \
radeonGetLock( rmesa, 0 ); \
DEBUG_LOCK(); \
} while (0)
/* Unlock the hardware. We must assume that state has been lost when we unlock,
* because when we next grab the lock (to emit an accumulated cmdbuf), we don't
* have the information to recreate the context state as of the last unlock in
* in the case that we did lose the context state.
*
* The alternative to this would be to copy out the state on unlock
* (approximately) and if we did lose the context, dispatch a cmdbuf to reset
* the state to that old copy before continuing with the accumulated command
* buffer.
*/
#define UNLOCK_HARDWARE( rmesa ) \
do { \
DRM_UNLOCK( rmesa->dri.fd, \
rmesa->dri.hwLock, \
rmesa->dri.hwContext ); \
DEBUG_RESET(); \
rmesa->lost_context = GL_TRUE; \
} while (0)
#endif
#endif /* __RADEON_LOCK_H__ */
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