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## 13 Miscellaneous Macros and Functions ¶

This chapter describes miscellaneous routines not covered elsewhere.

- `ffs`—find first bit set in a word
- `__retarget_lock_init`, `__retarget_lock_init_recursive`, `__retarget_lock_close`, `__retarget_lock_close_recursive`, `__retarget_lock_acquire`, `__retarget_lock_acquire_recursive`, `__retarget_lock_try_acquire`, `__retarget_lock_try_acquire_recursive`, `__retarget_lock_release`, `__retarget_lock_release_recursive`—locking routines
- `unctrl`—get printable representation of a character