-BN_BLINDING_thread_id() provides access to the B<CRYPTO_THREADID>
-object within the B<BN_BLINDING> structure. This is to help users
-provide proper locking if needed for multi-threaded use. The "thread
-id" object of a newly allocated B<BN_BLINDING> structure is
-initialised to the thread id in which BN_BLINDING_new() was called.
+BN_BLINDING_is_current_thread() returns whether the B<BN_BLINDING>
+structure is owned by the current thread. This is to help users
+provide proper locking if needed for multi-threaded use.
+
+BN_BLINDING_set_current_thread() sets the current thread as the
+owner of the B<BN_BLINDING> structure.
+
+BN_BLINDING_lock() locks the B<BN_BLINDING> structure.
+
+BN_BLINDING_unlock() unlocks the B<BN_BLINDING> structure.