document pthread structure ABI constraints in comments
authorRich Felker <dalias@aerifal.cx>
Mon, 5 Feb 2018 16:45:52 +0000 (11:45 -0500)
committerRich Felker <dalias@aerifal.cx>
Mon, 5 Feb 2018 16:45:52 +0000 (11:45 -0500)
commitcc7c300d1af22641b012268a959ac42f15341ed8
tree8dffe10e4f759c00f594372a383d6e4d2c00bded
parente53296f88952dcc6a9343dea53a4aa911f9a9c87
document pthread structure ABI constraints in comments

in the original submission of the patch that became commit
7c709f2d4f9872d1b445f760b0e68da89e256b9e, and in subsequent reading of
it by others, it was not clear that the new member had to be inserted
before canary_at_end, or that inserting it at that location was safe.
add comments to document.
src/internal/pthread_impl.h