PTME_LOCK atomic boolean and related handling

mission/com/TmStoreTaskBase.cpp

@@ -10,13 +10,15 @@
 #include "mission/persistentTmStoreDefs.h"
 
 TmStoreTaskBase::TmStoreTaskBase(object_id_t objectId, StorageManagerIF& ipcStore,
-                                 VirtualChannel& channel, SdCardMountedIF& sdcMan)
+                                 VirtualChannel& channel, SdCardMountedIF& sdcMan,
+                                 const std::atomic_bool& ptmeLocked)
     : SystemObject(objectId),
       modeHelper(this),
       ipcStore(ipcStore),
       tmReader(&timeReader),
       channel(channel),
-      sdcMan(sdcMan) {
+      sdcMan(sdcMan),
+      ptmeLocked(ptmeLocked) {
   requestQueue = QueueFactory::instance()->createMessageQueue(10);
 }
 
@@ -99,7 +101,8 @@ ReturnValue_t TmStoreTaskBase::handleOneDump(PersistentTmStoreWithTmQueue& store
     cancelDump(dumpContext, store, false);
     return returnvalue::FAILED;
   }
-  if (not channel.isBusy()) {
+  // It is assumed that the PTME will only be locked for a short period (e.g. to change datarate).
+  if (not channel.isBusy() and not ptmeLocked) {
     performDump(store, dumpContext, dumpPerformed);
   } else {
     // The PTME might be at full load, so it might sense to delay for a bit to let it do