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/**************************************************************************
*
* Copyright 2009 VMware, Inc.
* 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 "pipe/p_thread.h"
#include "dri_context.h"
#include "xf86drm.h"
pipe_static_mutex( lockMutex );
static void
dri_contended_lock(struct dri_context *ctx)
{
__DRIdrawablePrivate *dPriv = ctx->dPriv;
__DRIcontextPrivate *cPriv = ctx->cPriv;
__DRIscreenPrivate *sPriv = cPriv->driScreenPriv;
drmGetLock(sPriv->fd, cPriv->hHWContext, 0);
/* Perform round trip communication with server (including dropping
* and retaking the above lock) to update window dimensions:
*/
if (dPriv)
DRI_VALIDATE_DRAWABLE_INFO(sPriv, dPriv);
}
/* Lock the hardware and validate our state.
*/
void dri_lock_hardware( struct dri_context *ctx )
{
__DRIcontextPrivate *cPriv = ctx->cPriv;
__DRIscreenPrivate *sPriv = cPriv->driScreenPriv;
char __ret = 0;
pipe_mutex_lock(lockMutex);
assert(!ctx->locked);
DRM_CAS((drmLock *) &sPriv->pSAREA->lock,
cPriv->hHWContext,
(DRM_LOCK_HELD | cPriv->hHWContext),
__ret);
if (__ret)
dri_contended_lock( ctx );
ctx->locked = TRUE;
}
/* Unlock the hardware using the global current context
*/
void dri_unlock_hardware( struct dri_context *ctx )
{
__DRIcontextPrivate *cPriv = ctx->cPriv;
__DRIscreenPrivate *sPriv = cPriv->driScreenPriv;
assert(ctx->locked);
ctx->locked = FALSE;
DRM_UNLOCK(sPriv->fd,
(drmLock *) &sPriv->pSAREA->lock,
cPriv->hHWContext);
pipe_mutex_unlock(lockMutex);
}
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