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/**************************************************************************
*
* Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas.
* 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, sub license, 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 NON-INFRINGEMENT.
* IN NO EVENT SHALL TUNGSTEN GRAPHICS 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.
*
**************************************************************************/
#include "main/glheader.h"
#include "glapi/glthread.h"
#include <GL/internal/glcore.h>
#include "state_tracker/st_public.h"
#include "intel_context.h"
#include "i830_dri.h"
_glthread_DECLARE_STATIC_MUTEX( lockMutex );
static void
intelContendedLock(struct intel_context *intel, uint flags)
{
__DRIdrawablePrivate *dPriv = intel->driDrawable;
__DRIscreenPrivate *sPriv = intel->driScreen;
struct intel_screen *intelScreen = intel_screen(sPriv);
drmI830Sarea *sarea = intel->sarea;
drmGetLock(intel->driFd, intel->hHWContext, flags);
DBG(LOCK, "%s - got contended lock\n", __progname);
/* If the window moved, may need to set a new cliprect now.
*
* NOTE: This releases and regains the hw lock, so all state
* checking must be done *after* this call:
*/
if (dPriv)
DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
if (sarea->width != intelScreen->front.width ||
sarea->height != intelScreen->front.height) {
intelUpdateScreenRotation(sPriv, sarea);
}
}
/* Lock the hardware and validate our state.
*/
void LOCK_HARDWARE( struct intel_context *intel )
{
char __ret = 0;
_glthread_LOCK_MUTEX(lockMutex);
assert(!intel->locked);
DRM_CAS(intel->driHwLock, intel->hHWContext,
(DRM_LOCK_HELD|intel->hHWContext), __ret);
if (__ret)
intelContendedLock( intel, 0 );
DBG(LOCK, "%s - locked\n", __progname);
intel->locked = 1;
}
/* Unlock the hardware using the global current context
*/
void UNLOCK_HARDWARE( struct intel_context *intel )
{
assert(intel->locked);
intel->locked = 0;
DRM_UNLOCK(intel->driFd, intel->driHwLock, intel->hHWContext);
_glthread_UNLOCK_MUTEX(lockMutex);
DBG(LOCK, "%s - unlocked\n", __progname);
}
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