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void recursive_lock_release(pTHX_ recursive_lock_t *lock) ... } MUTEX_UNLOCK(&lock->mutex); }
# define MUTEX_LOCK(m) \ STMT_START { \ ... Perl_croak_nocontext("panic: MUTEX_LOCK (%d) [%s:%d]", \ _eC_, __FILE__, __LINE__); \ } STMT_END