--- /usr/local/src/apr-util-1.2.7/include/apr_queue.h	2005-02-04 14:45:35.000000000 -0600
+++ ./apr_queue-new.h	2006-11-26 15:29:49.000000000 -0600
@@ -102,6 +102,54 @@
 APU_DECLARE(apr_status_t) apr_queue_trypop(apr_queue_t *queue, void **data);
 
 /**
+ * Manually blocks pushing/adding onto the queue.
+ *
+ * @param queue the queue
+ * @returns APR_SUCCESS if blocking was successful
+ * @returns APR_EINTR the blocking was interrupted (try again)
+ * @returns APR_EOF if the queue has been terminated
+ */
+APU_DECLARE(apr_status_t) apr_queue_blockpush(apr_queue_t *queue);
+
+/**
+ * Manually unblocks pushing/adding onto the queue.
+ *
+ * @param queue the queue
+ * @returns APR_EOF if the queue has been terminated
+ * @returns APR_SUCCESS if unblocking was successful
+ */
+APU_DECLARE(apr_status_t) apr_queue_unblockpush(apr_queue_t *queue);
+
+/**
+ * Manually blocks popping/getting from the queue.
+ *
+ * @param queue the queue
+ * @returns APR_EINTR the blocking was interrupted (try again)
+ * @returns APR_EOF if the queue has been terminated
+ * @returns APR_SUCCESS if blocking was successful
+ */
+APU_DECLARE(apr_status_t) apr_queue_blockpop(apr_queue_t *queue);
+
+/**
+ * Manually unblocks popping/getting from the queue.
+ *
+ * @param queue the queue
+ * @returns APR_EOF if the queue has been terminated
+ * @returns APR_SUCCESS if unblocking was successful
+ */
+APU_DECLARE(apr_status_t) apr_queue_unblockpop(apr_queue_t *queue);
+
+/**
+ * Blocks until the queue is empty.
+ *
+ * @param queue the queue
+ * @returns APR_EINTR the blocking was interrupted (try again)
+ * @returns APR_EOF if the queue has been terminated
+ * @returns APR_SUCCESS if the queue is empty
+ */
+APU_DECLARE(apr_status_t) apr_queue_isempty(apr_queue_t *queue);
+
+/**
  * returns the size of the queue.
  *
  * @warning this is not threadsafe, and is intended for reporting/monitoring