Date: Sat, 22 Feb 2014 15:35:43 +0100 From: Jens Eichendorff <jexo@...ine.de> To: musl@...ts.openwall.com Subject: What does this code do? While skimming some parts of the musl libc I have come across the following weird line in `src/thread/__wait.c': if (priv) priv = 128; priv=0; whereby `priv' is then bitwise OR-ed to the FUTEX_WAIT operation constant to a futex syscall. Does this code exist to avoid optimizations, do optimizations, or just add waiting time? What does it do and what is the `priv' parameter of __wait() for? Excuse me if this is a really stupid question, I'm not very familiar with somewhat low-level code. Looking through the git logs this is part of the initial import commit, so I could not find any comments to why this was done. MfG Jens
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