Add UnloadEngine routine

diff --git a/backend.c b/backend.c
index fcc611a..07897c8 100644 (file)
--- a/backend.c
+++ b/backend.c
@@ -693,6 +693,24 @@ CommonEngineInit()
 }
 
 void
+UnloadEngine(ChessProgramState *cps)
+{
+       /* Kill off first chess program */
+       if (cps->isr != NULL)
+         RemoveInputSource(cps->isr);
+       cps->isr = NULL;
+
+       if (cps->pr != NoProc) {
+           ExitAnalyzeMode();
+            DoSleep( appData.delayBeforeQuit );
+           SendToProgram("quit\n", cps);
+            DoSleep( appData.delayAfterQuit );
+           DestroyChildProcess(cps->pr, cps->useSigterm);
+       }
+       cps->pr = NoProc;
+}
+
+void
 ClearOptions(ChessProgramState *cps)
 {
     int i;