Unused druntime code: Barrier, ReadWriteMutex, Condition

[Denis Feklushkin]

On Monday, 15 June 2026 at 10:35:39 UTC, Denis Feklushkin wrote:
> On Monday, 15 June 2026 at 09:41:00 UTC, Denis Feklushkin wrote:
>
>> Most likely, these primitives do not exist in any OS - they 
>> are too high-level and can be implemented on the basis of 
>> "more primitive" primitives. (Posix implementation just 
>> provides convient wrapper, I think)
>
> It is possible make PR on this base which will satisfy 
> everyone. However, I'll wait for information about Windows (see 
> previous message).

The attempt to use standard Semaphore and Mutex in ondition 
implementation failed because the current Condition semantics 
requires @nogc, but Mutex and Semaphore are classes and 
std.typecons.scoped isn't available in druntime.

This is another argument for moving this code to Phobos