detect: constify arguments

src/detect-engine-alert.c

@@ -69,8 +69,8 @@ void PacketAlertTagInit(void)
  * \retval 1 alert is not suppressed
  * \retval 0 alert is suppressed
  */
-static int PacketAlertHandle(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
-                             const Signature *s, Packet *p, PacketAlert *pa)
+static int PacketAlertHandle(const DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
+        const Signature *s, Packet *p, PacketAlert *pa)
 {
     SCEnter();
     int ret = 1;

src/detect-engine-threshold.c

@@ -947,7 +947,7 @@ static int ThresholdHandlePacketFlow(Flow *f, Packet *p, const DetectThresholdDa
  * \retval 1 alert on this event
  * \retval 0 do not alert on this event
  */
-int PacketAlertThreshold(DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
+int PacketAlertThreshold(const DetectEngineCtx *de_ctx, DetectEngineThreadCtx *det_ctx,
         const DetectThresholdData *td, Packet *p, const Signature *s, PacketAlert *pa)
 {
     SCEnter();

src/detect-engine-threshold.h

@@ -35,9 +35,8 @@ uint32_t ThresholdsExpire(const SCTime_t ts);
 
 const DetectThresholdData *SigGetThresholdTypeIter(
         const Signature *, const SigMatchData **, int list);
-int PacketAlertThreshold(DetectEngineCtx *, DetectEngineThreadCtx *,
-        const DetectThresholdData *, Packet *,
-        const Signature *, PacketAlert *);
+int PacketAlertThreshold(const DetectEngineCtx *, DetectEngineThreadCtx *,
+        const DetectThresholdData *, Packet *, const Signature *, PacketAlert *);
 
 void ThresholdListFree(void *ptr);
 void ThresholdCacheThreadFree(void);