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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 <pthread.h>
#include <driclient.h>
#include "nouveau_context.h"
#include "nouveau_screen.h"
static pthread_mutex_t lockMutex = PTHREAD_MUTEX_INITIALIZER;
static void
nouveau_contended_lock(struct nouveau_context *nv, unsigned int flags)
{
dri_drawable_t *dri_drawable = nv->dri_drawable;
dri_screen_t *dri_screen = nv->dri_context->dri_screen;
struct nouveau_screen *nv_screen = nv->nv_screen;
struct nouveau_device *dev = nv_screen->device;
struct nouveau_device_priv *nvdev = nouveau_device(dev);
drmGetLock(nvdev->fd, nvdev->ctx, flags);
/* 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 (dri_drawable)
DRI_VALIDATE_DRAWABLE_INFO(dri_screen, dri_drawable);
}
/* Lock the hardware and validate our state.
*/
void
LOCK_HARDWARE(struct nouveau_context *nv)
{
struct nouveau_screen *nv_screen = nv->nv_screen;
struct nouveau_device *dev = nv_screen->device;
struct nouveau_device_priv *nvdev = nouveau_device(dev);
char __ret=0;
pthread_mutex_lock(&lockMutex);
assert(!nv->locked);
DRM_CAS(nvdev->lock, nvdev->ctx,
(DRM_LOCK_HELD | nvdev->ctx), __ret);
if (__ret)
nouveau_contended_lock(nv, 0);
nv->locked = 1;
}
/* Unlock the hardware using the global current context
*/
void
UNLOCK_HARDWARE(struct nouveau_context *nv)
{
struct nouveau_screen *nv_screen = nv->nv_screen;
struct nouveau_device *dev = nv_screen->device;
struct nouveau_device_priv *nvdev = nouveau_device(dev);
assert(nv->locked);
nv->locked = 0;
DRM_UNLOCK(nvdev->fd, nvdev->lock, nvdev->ctx);
pthread_mutex_unlock(&lockMutex);
}
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