New approach for the empty packet queue issue. Now we just wait until it's no longer empty.

src/packet-queue.c

@@ -22,24 +22,18 @@ void PacketEnqueue (PacketQueue *q, Packet *p) {
 #endif /* DBG_PERF */
 }
 
-static u_int32_t dbg_packetdequeue = 0;
-
 Packet *PacketDequeue (PacketQueue *q) {
-    Packet *p = q->bot;
-    if (p == NULL) {
-        /* queue empty, alloc a new packet */
-        p = malloc(sizeof(Packet));
-        if (p == NULL) {
-            printf("ERROR: malloc failed: %s\n", strerror(errno));
-            return NULL;
+    /* if the queue is empty there are no packets left.
+     * In that case we sleep and try again. */
+    if (q->len == 0) {
+        printf("PacketDequeue: queue is empty, waiting...\n");
+        usleep(100000); /* sleep 100ms */
+        return PacketDequeue(q);
     }
 
-        CLEAR_TCP_PACKET(p);
-        CLEAR_PACKET(p);
+    /* pull the bottom packet from the queue */
+    Packet *p = q->bot;
 
-        dbg_packetdequeue++;
-        printf("PacketDequeue: alloced a new packet. MAX_PENDING %u, extra alloc: %u\n", MAX_PENDING, dbg_packetdequeue);
-    } else {
     /* more packets in queue */
     if (q->bot->prev != NULL) {
         q->bot = q->bot->prev;
@@ -49,9 +43,8 @@ Packet *PacketDequeue (PacketQueue *q) {
         q->top = NULL;
         q->bot = NULL;
     }
-
     q->len--;
-    }
+
     p->next = NULL;
     p->prev = NULL;
     return p;