rontolisp:mutex-acquire

(rontolisp:mutex-acquire mutex)

Blocks until the calling thread holds mutex (created by rontolisp:make-mutex), then returns the mutex. Prefer rontolisp:with-mutex, which releases the lock even when the body exits by signalling an error; a bare mutex-acquire whose matching rontolisp:mutex-release is skipped leaves the lock held forever.

The lock is reentrant, so a thread that already holds it acquires it again immediately and must release it once per acquisition. On both WASM backends there is only one thread, so this is a no-op that returns its argument.

Limitations

• There is no non-blocking or timed acquisition.
• A value that is not a mutex handle is an error.