7fe4c81ff0
git-svn-id: svn://svn.code.sf.net/p/loki-lib/code/trunk@334 7ec92016-0320-0410-acc4-a06ded1c099a
183 lines
5.7 KiB
C++
183 lines
5.7 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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// The Loki Library
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// Copyright (c) 2005 Richard Sposato
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// Permission to use, copy, modify, distribute and sell this software for any
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// purpose is hereby granted without fee, provided that the above copyright
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// notice appear in all copies and that both that copyright notice and this
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// permission notice appear in supporting documentation.
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// The authors make no representations about the
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// suitability of this software for any purpose. It is provided "as is"
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// without express or implied warranty.
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////////////////////////////////////////////////////////////////////////////////
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// $Header$
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#include "../../include/loki/SmallObj.h"
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#include "../../include/loki/Singleton.h"
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#include <iostream>
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using namespace std;
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// ----------------------------------------------------------------------------
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typedef Loki::SmallValueObject< LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL,
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LOKI_DEFAULT_CHUNK_SIZE, LOKI_MAX_SMALL_OBJECT_SIZE,
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LOKI_DEFAULT_OBJECT_ALIGNMENT, Loki::SingletonWithLongevity >
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LongLivedObject;
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typedef Loki::SmallValueObject< LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL,
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LOKI_DEFAULT_CHUNK_SIZE, LOKI_MAX_SMALL_OBJECT_SIZE,
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LOKI_DEFAULT_OBJECT_ALIGNMENT, Loki::NoDestroy >
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ImmortalObject;
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// ----------------------------------------------------------------------------
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class LongLivedSingleton : public LongLivedObject
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{
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public:
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typedef Loki::SingletonHolder< LongLivedSingleton, Loki::CreateUsingNew,
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Loki::SingletonWithLongevity, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
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MySmallSingleton;
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/// Returns reference to the singleton.
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inline static LongLivedSingleton & Instance( void )
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{
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return MySmallSingleton::Instance();
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}
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LongLivedSingleton( void )
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{
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cout << "LongLivedSingleton" << endl;
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}
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~LongLivedSingleton( void )
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{
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cout << "~LongLivedSingleton" << endl;
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}
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void DoThat( void )
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{
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cout << "LongLivedSingleton::DoThat" << endl;
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}
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private:
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char m_stuff[ 16 ];
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};
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// ----------------------------------------------------------------------------
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inline unsigned int GetLongevity( LongLivedSingleton * )
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{
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/// @note Must return a longevity level lower than the one in SmallObj.h.
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return 1;
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}
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// ----------------------------------------------------------------------------
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class ImmortalSingleton : public ImmortalObject
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{
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public:
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typedef Loki::SingletonHolder< ImmortalSingleton, Loki::CreateUsingNew,
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Loki::NoDestroy, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
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MySmallSingleton;
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/// Returns reference to the singleton.
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inline static ImmortalSingleton & Instance( void )
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{
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return MySmallSingleton::Instance();
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}
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ImmortalSingleton( void )
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{
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cout << "ImmortalSingleton" << endl;
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}
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~ImmortalSingleton( void )
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{
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cout << "~ImmortalSingleton destructor should never get called!" << endl;
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}
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void DoThat( void )
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{
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cout << "ImmortalSingleton::DoThat" << endl;
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}
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private:
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char m_stuff[ 16 ];
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};
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// ----------------------------------------------------------------------------
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class MortalSingleton : public ImmortalObject
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{
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public:
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typedef Loki::SingletonHolder< MortalSingleton, Loki::CreateUsingNew,
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Loki::SingletonWithLongevity, LOKI_DEFAULT_THREADING_NO_OBJ_LEVEL >
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MySmallSingleton;
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/// Returns reference to the singleton.
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inline static MortalSingleton & Instance( void )
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{
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return MySmallSingleton::Instance();
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}
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MortalSingleton( void )
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{
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cout << "MortalSingleton" << endl;
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}
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~MortalSingleton( void )
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{
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cout << "~MortalSingleton" << endl;
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}
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void DoThat( void )
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{
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cout << "MortalSingleton::DoThat" << endl;
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}
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private:
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char m_stuff[ 16 ];
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};
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// ----------------------------------------------------------------------------
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inline unsigned int GetLongevity( MortalSingleton * )
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{
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/// @note Must return a longevity level lower than the one in SmallObj.h.
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return 1;
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}
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// ----------------------------------------------------------------------------
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int main()
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{
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cout << "This program tests the three recommended combinations of singleton" << endl
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<< "lifetime policies for Loki's Small-Object Allocator and singleton" << endl
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<< "objects that are derived from SmallObject or SmallValueObject." << endl << endl
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<< "Those 3 recommended combinations are:" << endl
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<< "\t1. Both SmallObject and derived Singleton use NoDestroy policy." << endl
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<< "\t This is tested by the ImmortalSingleton class." << endl
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<< "\t2. Both use SingletonWithLongevity policy." << endl
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<< "\t This is tested by the LongLivedSingleton class." << endl
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<< "\t3. SmallObject has NoDestroy policy but the derived Singleton has" << endl
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<< "\t SingletonWithLongevity policy." << endl
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<< "\t This is tested by the MortalSingleton class." << endl << endl
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<< "If this program executes without crashing or asserting at exit time," << endl
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<< "then all 3 combinations work." << endl << endl;
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MortalSingleton::Instance().DoThat();
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LongLivedSingleton::Instance().DoThat();
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ImmortalSingleton::Instance().DoThat();
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system("PAUSE");
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return 0;
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}
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// ----------------------------------------------------------------------------
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// $Log$
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// Revision 1.3 2005/10/30 14:03:23 syntheticpp
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// replace tabs space
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//
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// Revision 1.2 2005/10/29 10:21:46 syntheticpp
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// find loki include files without a correct sreach pathand some small fixes
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//
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// Revision 1.1 2005/10/14 18:48:10 rich_sposato
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// Adding SmallSingleton test project to CVS.
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//
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