Adding SmallSingleton test project to CVS.

git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@300 7ec92016-0320-0410-acc4-a06ded1c099a

test/SmallObj/SmallSingleton.cpp

@@ -0,0 +1,177 @@
+////////////////////////////////////////////////////////////////////////////////
+// The Loki Library
+// Copyright (c) 2005 Richard Sposato
+// Permission to use, copy, modify, distribute and sell this software for any 
+//     purpose is hereby granted without fee, provided that the above copyright 
+//     notice appear in all copies and that both that copyright notice and this 
+//     permission notice appear in supporting documentation.
+// The authors make no representations about the 
+//     suitability of this software for any purpose. It is provided "as is" 
+//     without express or implied warranty.
+////////////////////////////////////////////////////////////////////////////////
+
+// $Header$
+
+
+#include "SmallObj.h"
+#include "Singleton.h"
+#include <iostream>
+
+
+using namespace std;
+
+
+// ----------------------------------------------------------------------------
+
+typedef Loki::SmallValueObject< LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL,
+    LOKI_DEFAULT_CHUNK_SIZE, LOKI_MAX_SMALL_OBJECT_SIZE,
+    LOKI_DEFAULT_OBJECT_ALIGNMENT, Loki::SingletonWithLongevity >
+LongLivedObject;
+
+typedef Loki::SmallValueObject< LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL,
+    LOKI_DEFAULT_CHUNK_SIZE, LOKI_MAX_SMALL_OBJECT_SIZE,
+    LOKI_DEFAULT_OBJECT_ALIGNMENT, Loki::NoDestroy >
+ImmortalObject;
+
+// ----------------------------------------------------------------------------
+
+class LongLivedSingleton : public LongLivedObject
+{
+public:
+
+    typedef Loki::SingletonHolder< LongLivedSingleton, Loki::CreateUsingNew,
+        Loki::SingletonWithLongevity, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
+        MySmallSingleton;
+
+    /// Returns reference to the singleton.
+    inline static LongLivedSingleton & Instance( void )
+    {
+        return MySmallSingleton::Instance();
+    }
+
+    LongLivedSingleton( void )
+    {
+        cout << "LongLivedSingleton" << endl;
+    }
+    ~LongLivedSingleton( void )
+    {
+        cout << "~LongLivedSingleton" << endl;
+    }
+    void DoThat( void )
+    {
+        cout << "LongLivedSingleton::DoThat" << endl;
+    }
+private:
+    char m_stuff[ 16 ];
+};
+
+// ----------------------------------------------------------------------------
+
+inline unsigned int GetLongevity( LongLivedSingleton * )
+{
+    /// @note Must return a longevity level lower than the one in SmallObj.h.
+    return 1;
+}
+
+// ----------------------------------------------------------------------------
+
+class ImmortalSingleton : public ImmortalObject
+{
+public:
+
+    typedef Loki::SingletonHolder< ImmortalSingleton, Loki::CreateUsingNew,
+        Loki::NoDestroy, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
+        MySmallSingleton;
+
+    /// Returns reference to the singleton.
+    inline static ImmortalSingleton & Instance( void )
+    {
+        return MySmallSingleton::Instance();
+    }
+
+    ImmortalSingleton( void )
+    {
+        cout << "ImmortalSingleton" << endl;
+    }
+    ~ImmortalSingleton( void )
+    {
+        cout << "~ImmortalSingleton destructor should never get called!" << endl;
+    }
+    void DoThat( void )
+    {
+        cout << "ImmortalSingleton::DoThat" << endl;
+    }
+private:
+    char m_stuff[ 16 ];
+};
+
+// ----------------------------------------------------------------------------
+
+class MortalSingleton : public ImmortalObject
+{
+public:
+
+    typedef Loki::SingletonHolder< MortalSingleton, Loki::CreateUsingNew,
+        Loki::SingletonWithLongevity, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
+        MySmallSingleton;
+
+    /// Returns reference to the singleton.
+    inline static MortalSingleton & Instance( void )
+    {
+        return MySmallSingleton::Instance();
+    }
+
+    MortalSingleton( void )
+    {
+        cout << "MortalSingleton" << endl;
+    }
+    ~MortalSingleton( void )
+    {
+        cout << "~MortalSingleton" << endl;
+    }
+    void DoThat( void )
+    {
+        cout << "MortalSingleton::DoThat" << endl;
+    }
+private:
+    char m_stuff[ 16 ];
+};
+
+// ----------------------------------------------------------------------------
+
+inline unsigned int GetLongevity( MortalSingleton * )
+{
+    /// @note Must return a longevity level lower than the one in SmallObj.h.
+    return 1;
+}
+
+// ----------------------------------------------------------------------------
+
+int main()
+{
+    cout << "This program tests the three recommended combinations of singleton" << endl
+         << "lifetime policies for Loki's Small-Object Allocator and singleton" << endl
+         << "objects that are derived from SmallObject or SmallValueObject." << endl << endl
+         << "Those 3 recommended combinations are:" << endl
+         << "\t1. Both SmallObject and derived Singleton use NoDestroy policy." << endl
+         << "\t   This is tested by the ImmortalSingleton class." << endl
+         << "\t2. Both use SingletonWithLongevity policy." << endl
+         << "\t   This is tested by the LongLivedSingleton class." << endl
+         << "\t3. SmallObject has NoDestroy policy but the derived Singleton has" << endl
+         << "\t   SingletonWithLongevity policy." << endl
+         << "\t   This is tested by the MortalSingleton class." << endl << endl
+         << "If this program executes without crashing or asserting at exit time," << endl
+         << "then all 3 combinations work." << endl << endl;
+    MortalSingleton::Instance().DoThat();
+    LongLivedSingleton::Instance().DoThat();
+    ImmortalSingleton::Instance().DoThat();
+	system("PAUSE");
+	return 0;
+}
+
+// ----------------------------------------------------------------------------
+
+// $Log$
+// Revision 1.1  2005/10/14 18:48:10  rich_sposato
+// Adding SmallSingleton test project to CVS.
+//