threading: optimize and unify post_pq checks

TmThreadsSlotProcessPkt did not need to look all 'slots' as only the first
slots post_pq can have been used.

Unify post_pq cleanup handling.

src/tm-threads.c

@@ -110,7 +110,7 @@ void TmThreadsUnsetFlag(ThreadVars *tv, uint32_t flag)
 /**
  * \brief Separate run function so we can call it recursively.
  *
- * \todo Deal with post_pq for slots beyond the first.
+ * \note post_pq if only used for first slot
  */
 TmEcode TmThreadsSlotVarRun(ThreadVars *tv, Packet *p, TmSlot *slot)
 {
@@ -602,37 +602,9 @@ static void *TmThreadsSlotVar(void *td)
             /* output the packet */
             tv->tmqh_out(tv, p);
 
-        } /* if (p != NULL) */
-
-        /* now handle the post_pq packets */
-        TmSlot *slot;
-        for (slot = s; slot != NULL; slot = slot->slot_next) {
-            if (slot->slot_post_pq.top != NULL) {
-                while (1) {
-                    SCMutexLock(&slot->slot_post_pq.mutex_q);
-                    Packet *extra_p = PacketDequeue(&slot->slot_post_pq);
-                    SCMutexUnlock(&slot->slot_post_pq.mutex_q);
-
-                    if (extra_p == NULL)
-                        break;
-
-                    if (slot->slot_next != NULL) {
-                        r = TmThreadsSlotVarRun(tv, extra_p, slot->slot_next);
-                        if (r == TM_ECODE_FAILED) {
-                            SCMutexLock(&slot->slot_post_pq.mutex_q);
-                            TmqhReleasePacketsToPacketPool(&slot->slot_post_pq);
-                            SCMutexUnlock(&slot->slot_post_pq.mutex_q);
-
-                            TmqhOutputPacketpool(tv, extra_p);
-                            TmThreadsSetFlag(tv, THV_FAILED);
-                            break;
-                        }
-                    }
-                    /* output the packet */
-                    tv->tmqh_out(tv, extra_p);
-                } /* while */
-            } /* if */
-        } /* for */
+            /* now handle the post_pq packets */
+            TmThreadsSlotHandlePostPQs(tv, s);
+        }
 
         if (TmThreadsCheckFlag(tv, THV_KILL)) {
             run = 0;

src/tm-threads.h

@@ -159,6 +159,34 @@ static inline void TmThreadsSlotProcessPktFail(ThreadVars *tv, TmSlot *s, Packet
     TmThreadsSetFlag(tv, THV_FAILED);
 }
 
+/**
+ *  \brief Handle timeout from the capture layer. Checks
+ *         post-pq which may have been filled by the flow
+ *         manager.
+ */
+static inline void TmThreadsSlotHandlePostPQs(ThreadVars *tv, TmSlot *s)
+{
+    /* post process pq: only the first slot will possible have used it */
+    if (s->slot_post_pq.top != NULL) {
+        while (1) {
+            SCMutexLock(&s->slot_post_pq.mutex_q);
+            Packet *extra_p = PacketDequeue(&s->slot_post_pq);
+            SCMutexUnlock(&s->slot_post_pq.mutex_q);
+            if (extra_p == NULL)
+                break;
+
+            if (s->slot_next != NULL) {
+                TmEcode r = TmThreadsSlotVarRun(tv, extra_p, s->slot_next);
+                if (r == TM_ECODE_FAILED) {
+                    TmThreadsSlotProcessPktFail(tv, s, extra_p);
+                    break;
+                }
+            }
+            tv->tmqh_out(tv, extra_p);
+        }
+    }
+}
+
 /**
  *  \brief Process the rest of the functions (if any) and queue.
  */
@@ -177,65 +205,8 @@ static inline TmEcode TmThreadsSlotProcessPkt(ThreadVars *tv, TmSlot *s, Packet
 
     tv->tmqh_out(tv, p);
 
-    /* post process pq */
-    for (TmSlot *slot = s; slot != NULL; slot = slot->slot_next) {
-        if (slot->slot_post_pq.top != NULL) {
-            while (1) {
-                SCMutexLock(&slot->slot_post_pq.mutex_q);
-                Packet *extra_p = PacketDequeue(&slot->slot_post_pq);
-                SCMutexUnlock(&slot->slot_post_pq.mutex_q);
-
-                if (extra_p == NULL)
-                    break;
-
-                if (slot->slot_next != NULL) {
-                    r = TmThreadsSlotVarRun(tv, extra_p, slot->slot_next);
-                    if (r == TM_ECODE_FAILED) {
-                        TmThreadsSlotProcessPktFail(tv, slot, extra_p);
-                        break;
-                    }
-                }
-                tv->tmqh_out(tv, extra_p);
-            }
-        } /* if (slot->slot_post_pq.top != NULL) */
-    }
-    return TM_ECODE_OK;
-}
-
-/**
- *  \brief Handle timeout from the capture layer. Checks
- *         post-pq which may have been filled by the flow
- *         manager.
- */
-static inline TmEcode TmThreadsSlotHandlePostPQs(ThreadVars *tv, TmSlot *s)
-{
-    /* post process pq */
-    for (TmSlot *slot = s; slot != NULL; slot = slot->slot_next) {
-        if (slot->slot_post_pq.top != NULL) {
-            while (1) {
-                SCMutexLock(&slot->slot_post_pq.mutex_q);
-                Packet *extra_p = PacketDequeue(&slot->slot_post_pq);
-                SCMutexUnlock(&slot->slot_post_pq.mutex_q);
-
-                if (extra_p == NULL)
-                    break;
+    TmThreadsSlotHandlePostPQs(tv, s);
 
-                if (slot->slot_next != NULL) {
-                    TmEcode r = TmThreadsSlotVarRun(tv, extra_p, slot->slot_next);
-                    if (r == TM_ECODE_FAILED) {
-                        SCMutexLock(&slot->slot_post_pq.mutex_q);
-                        TmqhReleasePacketsToPacketPool(&slot->slot_post_pq);
-                        SCMutexUnlock(&slot->slot_post_pq.mutex_q);
-
-                        TmqhOutputPacketpool(tv, extra_p);
-                        TmThreadsSetFlag(tv, THV_FAILED);
-                        return TM_ECODE_FAILED;
-                    }
-                }
-                tv->tmqh_out(tv, extra_p);
-            }
-        }
-    }
     return TM_ECODE_OK;
 }