Testing some singleton implementations

Stanislav Blinov stanislav.blinov at gmail.com
Fri Feb 7 04:31:32 PST 2014


On Friday, 7 February 2014 at 11:31:14 UTC, Stanislav Blinov 
wrote:
> On Friday, 7 February 2014 at 10:25:52 UTC, TC wrote:
>
>> Should't be the LockSingleton implemented like this instead?
>>
>> class LockSingleton
>> {
>>    static auto get()
>>    {
>>        if (_instance is null)
>
> (_instance is null) will most likely not be an atomic 
> operation. References are two words. Imagine that one thread 
> writes half a reference inside synchronized {}, then goes to 
> sleep. What would the thread that gets to that 'if' return? I'd 
> say it'll return "ouch".

Scratch that.


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