Windows with C++ - The Evolution of Synchronization in Windows and C++
This browser is no longer supported. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. November 2012 Volume 27 Number 11 Windows with C++ - The Evolution of Synchronization in Windows and C++ By Kenny Kerr | November 2012 When I first started writing concurrent software, C++ had no support for synchronization. Windows itself had only a han
Roll Your Own Lightweight Mutex
In an earlier post, I pointed out the importance of using a lightweight mutex. I also mentioned it was possible to write your own, provided you can live with certain limitations. Why would you do such a thing? Well, in the past, some platforms (like BeOS) didn’t provide a lightweight mutex in the native API. Today, that’s not really a concern. I’m mainly showing this because it’s an interesting lo
Locks Aren't Slow; Lock Contention Is
Locks (also known as mutexes) have a history of being misjudged. Back in 1986, in a Usenet discussion on multithreading, Matthew Dillon wrote, “Most people have the misconception that locks are slow.” 25 years later, this misconception still seems to pop up once in a while. It’s true that locking is slow on some platforms, or when the lock is highly contended. And when you’re developing a multithr
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