[Issue 23332] New: core.sync.condition notify methods should be @nogc

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=23332

          Issue ID: 23332
           Summary: core.sync.condition notify methods should be @nogc
           Product: D
           Version: D2
          Hardware: x86
                OS: Mac OS X
            Status: NEW
          Severity: enhancement
          Priority: P1
         Component: druntime
          Assignee: nobody at puremagic.com
          Reporter: garrett at damore.org

It would be desirable to be able to notify a condition from @nogc code. 
Underneath, neither Windows nor POSIX require an allocation.

However, the D implementation of this library attempts to handle any error that
comes from the pthread_cond_signal or pthread_cond_broadcast calls and turns
them into a thrown exceeption.

In general, these calls cannot fail on any system, unless they are provided
with invalid inputs.  Given that, it would be IMO perfectly reasonable to turn
this into a runtime error condition (e.g. via an assert or following the method
done for sync.mutex.Mutex.)

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