How to convert these constructs to D?

[Gary Willoughby]

On Sunday, 1 December 2013 at 20:46:20 UTC, Kozzi wrote:
>> I'm basically porting all the mysql-client headers which i 
>> thought would be pretty straight forward but it's taking a 
>> little more thought than i anticipated.
>
> Can I ask why? And the part of code you are asking is from 
> pthread headers not from mysql.

No, it's from my_pthread.h