Commit 557990cad33f1b06a1e2a416231d79590237dd2e
2023-03-02T12:41:11
Optimize arc4random_uniform() (by syncing with OpenBSD implementation) 1. In d4de062, in Feb 2010, libevent adopted OpenBSD implementation of arc4random_uniform. 2. In https://github.com/openbsd/src/commit/728918cba93e0418bea2a73c9784f6b80c2a9dbd, in Jun 2012, OpenBSD improved their implementation to be faster, by changing arc4random_uniform() to calculate ``2**32 % upper_bound'' as ``-upper_bound % upper_bound''. Alternatively we can simply remove arc4random_uniform() since it is not used by libevent anyway, but let's just sync the header for now.