tree 9b0f1d42e7f35d431b8110baf69ba9a612bfb27b
parent 0c12dcabc59ea9c95fc38197e7c4bc44663b0a26
author Jason Evans <jasone@canonware.com> 1462944070 -0700
committer Jason Evans <jasone@canonware.com> 1462945893 -0700

Resolve bootstrapping issues when embedded in FreeBSD libc.

b2c0d6322d2307458ae2b28545f8a5c9903d7ef5 (Add witness, a simple online
locking validator.) caused a broad propagation of tsd throughout the
internal API, but tsd_fetch() was designed to fail prior to tsd
bootstrapping.  Fix this by splitting tsd_t into non-nullable tsd_t and
nullable tsdn_t, and modifying all internal APIs that do not critically
rely on tsd to take nullable pointers.  Furthermore, add the
tsd_booted_get() function so that tsdn_fetch() can probe whether tsd
bootstrapping is complete and return NULL if not.  All dangerous
conversions of nullable pointers are tsdn_tsd() calls that assert-fail
on invalid conversion.