Utility function get_thread_id can be called from any Abaqus user subroutine. get_thread_id returns the ID that Abaqus assigns to each of its threads. These IDs are increasing integers starting from 0 (i.e., 0, 1, 2, 3, 4, etc.). The thread with ID 0 is the main thread.

In thread-parallel execution mutexes can be used to protect a common block or a common file from being updated by multiple threads at the same time. Abaqus provides 10 predefined mutexes that are referenced simply by number (1–10). MutexCreate(1) initializes mutex 1.MutexLock(1) and MutexUnlock(1), which respectively lock and unlock mutex 1. Other mutexes (up to 10) can be used in the same manner.