Spinlock and semaphore differ mainly in four things: 1. What they are A spinlock is one possible implementation of a lock, namely one that is implemented by busy waiting ("spinning"). A semaphore

The Theory In theory, when a thread tries to lock a mutex and it does not succeed, because the mutex is already locked, it will go to sleep, immediately allowing another thread to run. It will cont

http://www.codeproject.com/Articles/184046/Spin-Lock-in-C Note: There are valuable cotents in the comments

http://www.codeproject.com/Articles/10330/A-simple-IOCP-Server-Client-Class