-/**************************************************************************
-
-Copyright 2000, 2001 ATI Technologies Inc., Ontario, Canada, and
- VA Linux Systems Inc., Fremont, California.
-Copyright (C) The Weather Channel, Inc. 2002. All Rights Reserved.
-
-The Weather Channel (TM) funded Tungsten Graphics to develop the
-initial release of the Radeon 8500 driver under the XFree86 license.
-This notice must be preserved.
-
-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:
- * Gareth Hughes <gareth@valinux.com>
- * Keith Whitwell <keith@tungstengraphics.com>
- * Kevin E. Martin <martin@valinux.com>
- */
-
-#include "main/glheader.h"
-#include "main/mtypes.h"
-#include "main/colormac.h"
-#include "dri_util.h"
-#include "radeon_screen.h"
-#include "radeon_common.h"
-#include "radeon_lock.h"
-
-/* Update the hardware state. This is called if another context has
- * grabbed the hardware lock, which includes the X server. This
- * function also updates the driver's window state after the X server
- * moves, resizes or restacks a window -- the change will be reflected
- * in the drawable position and clip rects. Since the X server grabs
- * the hardware lock when it changes the window state, this routine will
- * automatically be called after such a change.
- */
-void radeonGetLock(radeonContextPtr rmesa, GLuint flags)
-{
- __DRIdrawable *const drawable = radeon_get_drawable(rmesa);
- __DRIdrawable *const readable = radeon_get_readable(rmesa);
- __DRIscreen *sPriv = rmesa->dri.screen;
-
- drmGetLock(rmesa->dri.fd, rmesa->dri.hwContext, flags);
-
- /* The window might have moved, so we might need to get new clip
- * rects.
- *
- * NOTE: This releases and regrabs the hw lock to allow the X server
- * to respond to the DRI protocol request for new drawable info.
- * Since the hardware state depends on having the latest drawable
- * clip rects, all state checking must be done _after_ this call.
- */
- if (drawable)
- DRI_VALIDATE_DRAWABLE_INFO(sPriv, drawable);
- if (readable && drawable != readable) {
- DRI_VALIDATE_DRAWABLE_INFO(sPriv, readable);
- }
-
- if (drawable && (rmesa->lastStamp != drawable->lastStamp)) {
- radeon_window_moved(rmesa);
- rmesa->lastStamp = drawable->lastStamp;
- }
-
- rmesa->vtbl.get_lock(rmesa);
-}
-#ifndef NDEBUG
-struct lock_debug {
- const char* function;
- const char* file;
- int line;
-};
-
-static struct lock_debug ldebug = {0};
-#endif
-
-#if 0
-/** TODO: use atomic operations for reference counting **/
-/** gcc 4.2 has builtin functios for this **/
-#define ATOMIC_INC_AND_FETCH(atomic) __sync_add_and_fetch(&atomic, 1)
-#define ATOMIC_DEC_AND_FETCH(atomic) __sync_sub_and_fetch(&atomic, 1)
-#else
-#define ATOMIC_INC_AND_FETCH(atomic) (++atomic)
-#define ATOMIC_DEC_AND_FETCH(atomic) (--atomic)
-#endif
-
-
-void radeon_lock_hardware(radeonContextPtr radeon
-#ifndef NDEBUG
- ,const char* function
- ,const char* file
- ,const int line
-#endif
- )
-{
- char ret = 0;
-
- if (!radeon->radeonScreen->driScreen->dri2.enabled) {
- if (ATOMIC_INC_AND_FETCH(radeon->dri.hwLockCount) > 1)
- {
-#ifndef NDEBUG
- if ( RADEON_DEBUG & RADEON_SANITY )
- fprintf(stderr, "*** %d times of recursive call to %s ***\n"
- "Original call was from %s (file: %s line: %d)\n"
- "Now call is coming from %s (file: %s line: %d)\n"
- , radeon->dri.hwLockCount, __FUNCTION__
- , ldebug.function, ldebug.file, ldebug.line
- , function, file, line
- );
-#endif
- return;
- }
- DRM_CAS(radeon->dri.hwLock, radeon->dri.hwContext,
- (DRM_LOCK_HELD | radeon->dri.hwContext), ret );
- if (ret)
- radeonGetLock(radeon, 0);
-#ifndef NDEBUG
- ldebug.function = function;
- ldebug.file = file;
- ldebug.line = line;
-#endif
- }
-}
-
-void radeon_unlock_hardware(radeonContextPtr radeon)
-{
- if (!radeon->radeonScreen->driScreen->dri2.enabled) {
- if (ATOMIC_DEC_AND_FETCH(radeon->dri.hwLockCount) > 0)
- {
- return;
- }
- DRM_UNLOCK( radeon->dri.fd,
- radeon->dri.hwLock,
- radeon->dri.hwContext );
- }
-}