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Although json-c does not support fully multi-threaded access to
-object trees, it has some code to help make use in threaded programs
+object trees, it has some code to help make threaded programs
a bit safer. Currently, this is limited to using atomic operations for
json_object_get() and json_object_put().
--enable-threading
Separately, the default hash function used for object field keys,
-lh_char_hash, uses a compare-and-swap operation to ensure the randomly
+lh_char_hash, uses a compare-and-swap operation to ensure the random
seed is only generated once. Because this is a one-time operation, it
is always compiled in when the compare-and-swap operation is available.