Initial version

code/threads/system.h

@@ -0,0 +1,52 @@
+// system.h 
+//      All global variables used in Nachos are defined here.
+//
+// Copyright (c) 1992-1993 The Regents of the University of California.
+// All rights reserved.  See copyright.h for copyright notice and limitation 
+// of liability and disclaimer of warranty provisions.
+
+#ifndef SYSTEM_H
+#define SYSTEM_H
+
+#include "copyright.h"
+#include "utility.h"
+#include "thread.h"
+#include "scheduler.h"
+#include "interrupt.h"
+#include "stats.h"
+#include "timer.h"
+
+// Initialization and cleanup routines
+extern void Initialize (int argc, char **argv);	// Initialization,
+						// called before anything else
+extern void Cleanup ();		// Cleanup, called when
+						// Nachos is done.
+
+extern Thread *currentThread;	// the thread holding the CPU
+extern Thread *threadToBeDestroyed;	// the thread that just finished
+extern Scheduler *scheduler;	// the ready list
+extern Interrupt *interrupt;	// interrupt status
+extern Statistics *stats;	// performance metrics
+extern Timer *timer;		// the hardware alarm clock
+
+#ifdef USER_PROGRAM
+#include "machine.h"
+extern Machine *machine;	// user program memory and registers
+#endif
+
+#ifdef FILESYS_NEEDED		// FILESYS or FILESYS_STUB
+#include "filesys.h"
+extern FileSystem *fileSystem;
+#endif
+
+#ifdef FILESYS
+#include "synchdisk.h"
+extern SynchDisk *synchDisk;
+#endif
+
+#ifdef NETWORK
+#include "post.h"
+extern PostOffice *postOffice;
+#endif
+
+#endif // SYSTEM_H