Re: Singleton CLass implementation

From:

annamalai <annamalai.gurusami@gmail.com>

Newsgroups:

comp.lang.c++.moderated

Date:

Wed, 12 Nov 2008 00:57:50 CST

Message-ID:

<7e6a98cc-27e6-4b73-aa48-cd43ca8e3e61@v16g2000prc.googlegroups.com>

On Nov 11, 3:14 pm, boopathi...@gmail.com wrote:

Could anyone give me the code for implementing singleton class. I

In my opinion, the singleton pattern is not a good solution in most of
the situations. The article, "Use your singletons wisely," discusses
some of the issues. Check it out before making use of singletons in
your project.

http://www.ibm.com/developerworks/library/co-single.html

Here is an example singleton implementation for your
experimentation.

$ cat single.cc
#include <cassert>
struct SP {
    static SP* instance() {
      if (!sp_) sp_ = new SP();
      return sp_;
    }
private:
    static SP* sp_;
    SP(){}
};

SP* SP::sp_;

int main()
{
    SP* obj1 = SP::instance();
    SP* obj2 = SP::instance();
    assert( obj1 == obj2);
}
$ g++ -Wall single.cc
$ ./a.exe
$

Rgds,
anna

--
Love of a Father
http://missingrainbow.blogspot.com/2008/07/love-of-father.html

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