1 files changed, 156 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bin_queue.c b/src/gallium/drivers/llvmpipe/lp_bin_queue.c
new file mode 100644
index 0000000000..19e1a5827b
--- /dev/null
+++ b/src/gallium/drivers/llvmpipe/lp_bin_queue.c
@@ -0,0 +1,156 @@
+/**************************************************************************
+ *
+ * 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 VMWARE 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.
+ *
+ **************************************************************************/
+
+
+/**
+ * Bin queue.  We'll use two queues.  One contains "full" bins which
+ * are produced by the "setup" code.  The other contains "empty" bins
+ * which are produced by the "rast" code when it finishes rendering a bin.
+ */
+
+
+#include "pipe/p_thread.h"
+#include "lp_bin.h"
+#include "lp_bin_queue.h"
+
+
+
+#define MAX_BINS 4
+
+
+/**
+ * A queue of bins
+ */
+struct lp_bins_queue
+{
+   /** XXX might use a linked list here somedone, but the list will
+    * probably always be pretty short.
+    */
+   struct lp_bins *bins[MAX_BINS];
+   unsigned size;
+
+   pipe_condvar size_change;
+   pipe_mutex mutex;
+};
+
+
+
+/** Allocate a new bins queue */
+struct lp_bins_queue *
+lp_bins_queue_create(void)
+{
+   struct lp_bins_queue *queue = CALLOC_STRUCT(lp_bins_queue);
+   if (queue) {
+      pipe_condvar_init(queue->size_change);
+      pipe_mutex_init(queue->mutex);
+   }
+   return queue;
+}
+
+
+/** Delete a new bins queue */
+void
+lp_bins_queue_destroy(struct lp_bins_queue *queue)
+{
+   pipe_condvar_destroy(queue->size_change);
+   pipe_mutex_destroy(queue->mutex);
+}
+
+
+/** Remove first lp_bins from head of queue */
+struct lp_bins *
+lp_bins_dequeue(struct lp_bins_queue *queue)
+{
+   struct lp_bins *bins;
+   unsigned i;
+
+   pipe_mutex_lock(queue->mutex);
+   while (queue->size == 0) {
+      pipe_condvar_wait(queue->size_change, queue->mutex);
+   }
+
+   assert(queue->size >= 1);
+
+   /* get head */
+   bins = queue->bins[0];
+
+   /* shift entries */
+   for (i = 0; i < queue->size - 1; i++) {
+      queue->bins[i] = queue->bins[i + 1];
+   }
+
+   queue->size--;
+
+   /* signal size change */
+   pipe_condvar_signal(queue->size_change);
+
+   pipe_mutex_unlock(queue->mutex);
+
+   return bins;
+}
+
+
+/** Add an lp_bins to tail of queue */
+void
+lp_bins_enqueue(struct lp_bins_queue *queue, struct lp_bins *bins)
+{
+   pipe_mutex_lock(queue->mutex);
+
+   assert(queue->size < MAX_BINS);
+
+   /* add to end */
+   queue->bins[queue->size++] = bins;
+
+   /* signal size change */
+   pipe_condvar_signal(queue->size_change);
+
+   pipe_mutex_unlock(queue->mutex);
+}
+
+
+/** Return number of entries in the queue */
+unsigned
+lp_bins_queue_size(struct lp_bins_queue *queue)
+{
+   unsigned sz;
+   pipe_mutex_lock(queue->mutex);
+   sz = queue->size;
+   pipe_mutex_unlock(queue->mutex);
+   return sz;
+}
+
+
+/** Wait until the queue as 'size' entries */
+void
+lp_bins_queue_wait_size(struct lp_bins_queue *queue, unsigned size)
+{
+   pipe_mutex_lock(queue->mutex);
+   while (queue->size != size) {
+      pipe_condvar_wait(queue->size_change, queue->mutex);
+   }
+   pipe_mutex_unlock(queue->mutex);
+}