/************************************************************************** * * 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); }