Hi.

I use condition-wait in many acquire recursive-lock. Other thread try to acquire recusirve-lock's lock at dead locked.

Below code reproduce a problem on Clozure CL. --- (defvar *condition-variable* (bt:make-condition-variable)) (defvar *recursive-lock* (bt:make-recursive-lock))

(defun worker-job (out) (bt:with-recursive-lock-held (*recursive-lock*) (bt:with-recursive-lock-held (*recursive-lock*) (format out "before condition wait~%") (force-output out) (bt:condition-wait *condition-variable* *recursive-lock*) (format out "after condition wait~%") (force-output out))))

(defun condition-use-in-recursive-lock () (let* ((out *standard-output*) (worker (bt:make-thread (lambda () (worker-job out))))) (sleep 1) (format out "before condition notify~%") (force-output out) (bt:with-recursive-lock-held (*recursive-lock*) ; Dead lock point. (bt:condition-notify *condition-variable*) (format out "after condition notify~%") (force-output out)) (bt:join-thread worker)))

(condition-use-in-recurive-lock) ---

conditon-wait is lock release and wait semaphore. Lock object acquirable many times. but conditon-wait is release lock at once.

I make a patch at here. https://github.com/rayfill/bordeaux-threads/commit/192124d18a2b2858e6e8aa2cc...

Poor english sorry...