move locking to new file

1 files changed, 169 insertions, 0 deletions

diff --git a/src/mesa/drivers/dri/intel_winsys/intel_lock.c b/src/mesa/drivers/dri/intel_winsys/intel_lock.c
new file mode 100644
index 0000000000..34319545d9
--- /dev/null
+++ b/src/mesa/drivers/dri/intel_winsys/intel_lock.c
@@ -0,0 +1,169 @@
+/**************************************************************************
+ * 
+ * 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 "glheader.h"
+#include "context.h"
+#include "extensions.h"
+
+#include "intel_screen.h"
+
+#include "i830_dri.h"
+
+#include "intel_ioctl.h"
+#include "intel_batchbuffer.h"
+
+#include "state_tracker/st_public.h"
+#include "state_tracker/st_context.h"
+
+#include "drirenderbuffer.h"
+#include "vblank.h"
+#include "utils.h"
+#include "xmlpool.h"            /* for symbolic values of enum-type options */
+
+
+
+_glthread_DECLARE_STATIC_MUTEX( lockMutex );
+
+
+static void
+intelContendedLock(struct intel_context *intel, GLuint flags)
+{
+   __DRIdrawablePrivate *dPriv = intel->driDrawable;
+   __DRIscreenPrivate *sPriv = intel->driScreen;
+   intelScreenPrivate *intelScreen = (intelScreenPrivate *) sPriv->private;
+   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);
+   }
+
+#if 0
+   if (sarea->width != intel->width ||
+       sarea->height != intel->height ||
+       sarea->rotation != intel->current_rotation) {
+      int numClipRects = intel->numClipRects;
+
+      /*
+       * FIXME: Really only need to do this when drawing to a
+       * common back- or front buffer.
+       */
+
+      /*
+       * This will essentially drop the outstanding batchbuffer on the floor.
+       */
+      intel->numClipRects = 0;
+
+      INTEL_FIREVERTICES(intel);
+
+      if (intel->batch->map != intel->batch->ptr)
+	 intel_batchbuffer_flush(intel->batch);
+
+      intel->numClipRects = numClipRects;
+
+      /* force window update */
+      intel->lastStamp = 0;
+
+      intel->width = sarea->width;
+      intel->height = sarea->height;
+      intel->current_rotation = sarea->rotation;
+   }
+#endif
+}
+
+/* Lock the hardware and validate our state.
+ */
+void LOCK_HARDWARE( struct intel_context *intel )
+{
+    char __ret=0;
+    struct intel_framebuffer *intel_fb = NULL;
+    int curbuf;
+
+    _glthread_LOCK_MUTEX(lockMutex);
+    assert(!intel->locked);
+
+    if (intel->driDrawable) {
+       intel_fb = intel->driDrawable->driverPrivate;
+    }
+
+    curbuf = 0; /* current draw buf: 0 = front, 1 = back */
+
+    if (intel_fb && intel_fb->vblank_flags &&
+	!(intel_fb->vblank_flags & VBLANK_FLAG_NO_IRQ) &&
+	(intel_fb->vbl_waited - intel_fb->vbl_pending[curbuf]) > (1<<23)) {
+       drmVBlank vbl;
+
+       vbl.request.type = DRM_VBLANK_ABSOLUTE;
+
+       if ( intel_fb->vblank_flags & VBLANK_FLAG_SECONDARY ) {
+          vbl.request.type |= DRM_VBLANK_SECONDARY;
+       }
+
+       vbl.request.sequence = intel_fb->vbl_pending[curbuf];
+       drmWaitVBlank(intel->driFd, &vbl);
+       intel_fb->vbl_waited = vbl.reply.sequence;
+    }
+
+    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);
+}