/*
- * Copyright (C) 2007-2009 Andre Noll <maan@systemlinux.org>
+ * Copyright (C) 2007-2010 Andre Noll <maan@systemlinux.org>
*
* Licensed under the GPL v2. For licencing details see COPYING.
*/
#include "para.h"
#include "list.h"
#include "afh.h"
-#include "vss.h"
#include "string.h"
#include "error.h"
/**
* Remove the current chunk from the queue.
*
- * \param cq The chunk to remove.
+ * \param cq The queue to remove from.
*/
void cq_dequeue(struct chunk_queue *cq)
{
struct queued_chunk *qc = cq_peek(cq);
assert(qc);
+ assert(cq->num_pending >= qc->num_bytes);
+ cq->num_pending -= qc->num_bytes;
list_del(&qc->node);
free(qc);
}
+/**
+ * Force to add a chunk to the given queue.
+ *
+ * \param cq See \ref cq_enqueue.
+ * \param buf See \ref cq_enqueue.
+ * \param num_bytes See \ref cq_enqueue.
+ *
+ * If queuing the given buffer would result in exceeding the maximal queue
+ * size, buffers are dropped from the beginning of the queue. Note that this
+ * function still might fail.
+ *
+ * \return Standard.
+ */
+int cq_force_enqueue(struct chunk_queue *cq, const char *buf, size_t num_bytes)
+{
+ int ret;
+
+ if (num_bytes > cq->max_pending)
+ return -E_QUEUE;
+ for (;;) {
+ ret = cq_enqueue(cq, buf, num_bytes);
+ if (ret >= 0)
+ return ret;
+ cq_dequeue(cq);
+ }
+ /* never reached */
+}
+
/**
* Change the number of bytes sent for the current queued chunk.
*