[Bug c++/13487] Construction of local static objects is not thread-safe

["gianni at mariani dot ws" <gcc-bugzilla at gcc dot gnu dot org>]

------- Additional Comments From gianni at mariani dot ws  2004-07-03 21:09 -------

> because the initializers are done when the module is loaded ...

That's not true.

"static" function variables are constructed the first time through the section
of code.

i.e.

int f( int a )
{
   static int x( a );
   return x;
}

...
    cout << z( 1 ) << " " << z( 2 );
...
prints "1 1".

also

int z( int a )
{
   if ( a & 1 )
   {
       static int v( a )
       return v;
   } else {
       static int v( a );
       return v;
   }
}

cout << z( 1 ) << " " << z( 2 ) " ";
cout << z( 3 ) << " " << z( 4 );

prints "1 2 1 2"




-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13487