TD3 II.2 Add useful variable in system.cc for processes counter

code/threads/system.cc

@@ -12,6 +12,10 @@
 #include <malloc.h>
 #endif
 
+#ifdef CHANGED
+#include "synch.h"
+#endif // CHANGED
+
 // This defines *all* of the global data structures used by Nachos.
 // These are all initialized and de-allocated by this file.
 
@@ -37,6 +41,8 @@ Machine *machine;		// user program memory and registers
 #ifdef CHANGED // Define our consoledriver Object
 ConsoleDriver *consoledriver;
 PageProvider *pageProvider;
+int processes;
+Semaphore * semProcessesCounter;
 #endif // CHANGED
 
 #endif // USER_PROGRAM
@@ -188,6 +194,8 @@ Initialize (int argc, char **argv)
 
     #ifdef CHANGED
     pageProvider = new PageProvider((int)(MemorySize/PageSize));
+    processes = 0;
+    semProcessesCounter = new Semaphore("Count Processes",1);
     #endif //CHANGED
 #endif
 #ifdef FILESYS

code/threads/system.h

@@ -15,6 +15,9 @@
 #include "interrupt.h"
 #include "stats.h"
 #include "timer.h"
+#ifdef CHANGED
+class Semaphore;
+#endif //CHANGED
 
 // Initialization and cleanup routines
 extern void Initialize (int argc, char **argv);	// Initialization,
@@ -39,6 +42,9 @@ extern Machine *machine;	// user program memory and registers
 extern ConsoleDriver *consoledriver; // add console driver
 #include "pageprovider.h"
 extern PageProvider *pageProvider;   // add our page provider
+// count Processes
+extern Semaphore * semProcessesCounter;
+extern int processes;
 #endif //CHANGED
 
 #endif