From: Jeff King <peff@peff.net>
Date: Tue, 16 Apr 2013 19:46:22 +0000 (-0400)
Subject: usage: allow pluggable die-recursion checks
X-Git-Tag: v1.8.2.2~1^2~1
X-Git-Url: https://git.lorimer.id.au/gitweb.git/diff_plain/c19a490e37181de8fa94ae1074af4b9f9a518f95?ds=inline;hp=c19a490e37181de8fa94ae1074af4b9f9a518f95

usage: allow pluggable die-recursion checks

When any git code calls die or die_errno, we use a counter
to detect recursion into the die functions from any of the
helper functions. However, such a simple counter is not good
enough for threaded programs, which may call die from a
sub-thread, killing only the sub-thread (but incrementing
the counter for everyone).

Rather than try to deal with threads ourselves here, let's
just allow callers to plug in their own recursion-detection
function. This is similar to how we handle the die routine
(the caller plugs in a die routine which may kill only the
sub-thread).

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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