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