RE: [boost] platform specific structures

From: Puverle, Tomas (IT) (Tomas.Puverle_at_[hidden])
Date: 2004-09-20 07:33:50

> The Win32 API provides InterlockedXXX for atomic operations 
> on long data types, e.g. InterlockedIncrement. I am not sure 
> about other OS's, but it should be possible to define an 
> atomic_long class:
> 
>    class atomic_long
>    {
>       private: long val;
>       public:
>          inline atomic_long & operator++()
>          {
>             InterlockedIncrement( &val );
>             return( *this );
>          }
>          // ...
>    };

I think this design could cause problems - presumably, there would need
to be a way to test the value of the atomic_long, such as
operator==(long), but that could lead to problematic code:

if (++myAtomicLong == someValue) 
        //...
else
        //...

An easy fix would be to make the return type void.

Tom 
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