Index: trunk/ppMerge/src/ppMerge.h
===================================================================
--- trunk/ppMerge/src/ppMerge.h	(revision 18758)
+++ trunk/ppMerge/src/ppMerge.h	(revision 18839)
@@ -15,5 +15,5 @@
 #define TIMERNAME "ppMerge"             // Name for timer
 #define PPMERGE_RECIPE "PPMERGE"        // Recipe name
-#define THREADED 0
+#define THREADED 1
 
 // Type of frame to merge
@@ -39,4 +39,6 @@
     bool read;
     bool busy;
+    int firstScan;
+    int lastScan;
 } ppMergeFileGroup;
 
@@ -100,6 +102,8 @@
 
 ppMergeFileGroup *ppMergeFileGroupAlloc();
-ppMergeFileGroup *ppMergeReadChunk (psArray *fileGroups, pmConfig *config, int numChunk);
+ppMergeFileGroup *ppMergeReadChunk (bool *status, psArray *fileGroups, pmConfig *config, int numChunk);
 void *ppMergeThreadLauncher (void *data);
 
+bool ppMergeSetThreads ();
+
 #endif