Initial community commit

Src/nu/ReEntry.h

@@ -0,0 +1,68 @@
+#ifndef NULLSOFT_UTILITY_RENTRYH
+#define NULLSOFT_UTILITY_RENTRYH
+
+#include <string>
+
+
+namespace Nullsoft
+{
+	namespace Utility
+	{
+
+
+		class ReEntryGuard
+		{
+		public:
+			ReEntryGuard() : entered(false)
+			{}
+
+
+			bool FunctionCall(std::string funcName = "Unknown")
+			{
+
+				if (entered)
+				{
+					char errorMsg[256];
+					sprintf(errorMsg, "%s branched to %s", firstFunc.c_str(), funcName.c_str());
+					::MessageBox(NULL, errorMsg, "Class ReEntry error", MB_OK);
+					return false;
+				}
+				else
+				{
+					firstFunc = funcName;
+					entered = true;
+					return true;
+				}
+	
+
+			}
+			void LeaveFunction()
+			{
+				entered = false;
+				firstFunc = "";
+			}
+		private:
+			bool entered;
+			std::string firstFunc;
+
+		};
+		class ReEntry
+		{
+		public:
+			ReEntry(ReEntryGuard &_entry, std::string funcName = "Unknown") : entry(&_entry)
+			{
+				entry->FunctionCall(funcName);
+			}
+
+			~ReEntry()
+			{
+				entry->LeaveFunction();
+			}
+
+		private:
+			ReEntryGuard *entry;
+
+		};
+	}
+}
+#endif