Signed integer overflow is undefined, so make sure you're using an unsigned type...

JoachimSchipper on Oct 15, 2011 | parent | context | favorite | on: What is your favourite C programming trick?

Signed integer overflow is undefined, so make sure you're using an unsigned type in your ringbuffer example. (And an array with some-power-of-2 elements; you should probably use sizeof(array)/sizeof(<star> array) instead of ARRAY_SIZE too.)