*
* ,----------------------,-----------,---,
* | thread ID | count | 0 |
- * `----------------------'-----------'---´
+ * `----------------------'-----------'---'
*
* thread ID......the 'index' of the owning thread, or 0
* count..........number of times the lock has been entered minus 1
*
* ,----------------------------------,---,
* | lock_record_t * (without LSB) | 1 |
- * `----------------------------------'---´
+ * `----------------------------------'---'
*
* 1..............the shape bit is 1 in fat lock mode
*/