92 lines
2.2 KiB
C++
92 lines
2.2 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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// A singleton Log object that resurrects itself after
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// it has been automatically destroyed during program
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// termination. When a dead-reference to the Log
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// singleton is detected, it is resurrected automatically.
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//
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// Expected output:
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// Example c'tor
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// Log c'tor
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// Log now instantiated.
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// Log d'tor
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// Example d'tor starting
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// Log c'tor
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// Log: inside Example d'tor
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// Example d'tor finished
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//
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// The last line of the output only appears when this
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// program is compiled with the ATEXIT_FIXED symbol
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// defined (see the Loki library and the CUJ article).
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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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class Log
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{
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public:
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Log()
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{
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echo("Log c'tor");
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}
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~Log()
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{
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echo("Log d'tor");
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}
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void echo(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<Log, CreateUsingNew, PhoenixSingleton> log;
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// A generic example class that stores and echoes a const char.
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//
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class Example
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{
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public:
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Example()
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{
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echo("Example c'tor");
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}
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~Example()
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{
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echo("Example d'tor starting");
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log::Instance().echo("Log: inside Example d'tor");
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echo("Example d'tor finished");
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}
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void echo(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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int main(int argc, char* argv[])
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{
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Example *example = new Example();
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SetLongevity<Example, void (*)(Example*)>(example, 1, &Loki::Private::Deleter<Example>::Delete);
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log::Instance().echo("Log now instantiated.");
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#if defined(__BORLANDC__) || defined(__GNUC__) || defined(_MSC_VER)
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system("pause"); // Stop console window from closing if run from IDE.
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#endif
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return 0;
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}
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