Added ScriptableImage plus the beginnings of dependency stuff

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@58 0fc631ac-6414-0410-93d0-97cfa31319b6

src/util/age.hpp

@@ -0,0 +1,56 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_UTIL_AGE
+#define HEADER_UTIL_AGE
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+
+#ifdef _MSC_VER
+	extern "C" {
+		LONG  __cdecl _InterlockedIncrement(LONG volatile *Addend);
+		LONG  __cdecl _InterlockedDecrement(LONG volatile *Addend);
+	}
+	#pragma intrinsic (_InterlockedIncrement)
+	#define InterlockedIncrement _InterlockedIncrement
+	#pragma intrinsic (_InterlockedDecrement)
+	#define InterlockedDecrement _InterlockedDecrement
+#endif
+
+// ----------------------------------------------------------------------------- : Age
+
+/// Represents the age of a value, higher values are newer
+/** Age is counted using a global variable */
+class Age {
+  public:
+	/// Construct a new age value, 
+	Age() {
+		update();
+	}
+	
+	/// Update the age to become the newest one
+	inline void update() {
+		age = InterlockedIncrement(&new_age);
+	}
+	
+	/// Compare two ages, smaller means earlier
+	inline bool operator < (Age a) const { return age < a.age; }
+	
+  private:
+	/// This age
+	LONG age;
+	/// Global age counter, value of the last age created
+	static volatile LONG new_age;
+};
+
+// ----------------------------------------------------------------------------- : Aged
+
+
+
+// ----------------------------------------------------------------------------- : EOF
+#endif