Adding DeletableSingleton project to CVS.

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@540 7ec92016-0320-0410-acc4-a06ded1c099a

test/DeletableSingleton/DeletableSingleton.cpp

@@ -0,0 +1,80 @@
+////////////////////////////////////////////////////////////////////////////////
+// The Loki Library
+// Copyright (c) 2005 by Curtis Krauskopf
+// Copyright (c) 2005 by Peter Kuemmel
+//
+// Code covered by the MIT License
+// The authors make no representations about the suitability of this software
+// for any purpose. It is provided "as is" without express or implied warranty.
+////////////////////////////////////////////////////////////////////////////////
+
+// Show an example of a Loki policy that uses DeletableSingleton.
+//
+// Expected output:
+//
+//    LogClass::LogClass()
+//    LogClass singleton instantiated
+//    Going to manually delete LogBook.
+//    LogClass::~LogClass()
+//    LogClass::LogClass()
+//    LogClass reinstantiated.
+//    Going to terminate program now.
+//    LogClass::~LogClass()
+//
+
+#include <iostream>
+#include <loki/Singleton.h>   // for Loki::SingletonHolder
+
+using namespace std;   // okay for small programs
+using namespace Loki;  // okay for small programs
+
+// A singleton LogClass object derived from the Example class.
+// Its longevity is set by the user on the command line.
+//
+class LogClass
+{
+public:
+    LogClass()
+    {
+        print("LogClass::LogClass()");
+    };
+    ~LogClass()
+    {
+        print("LogClass::~LogClass()");
+    }
+    void print(const char *s)
+    {
+        cout << s << endl;
+    }
+};
+
+typedef SingletonHolder<LogClass, CreateUsingNew, DeletableSingleton> LogBook;
+
+class Example
+{
+public:
+    void method()
+    {
+        cout << "test\n";
+    }
+};
+
+
+int main(int argc, char *argv[])
+{
+    // Instantiate both singletons by calling them...
+    LogBook::Instance().print("LogClass singleton instantiated");
+    LogBook::Instance().print("Going to manually delete LogBook.");
+
+    DeletableSingleton<LogClass>::GracefulDelete();
+
+    LogBook::Instance().print("LogClass reinstantiated.");
+    LogBook::Instance().print("Going to terminate program now.");
+
+#if defined(__BORLANDC__) || defined(_MSC_VER)
+    system("PAUSE");
+#endif
+
+    return 0;
+}
+