End of Life Ruby 3.0 has reached end of life and gets no more fixes. Switch to Ruby 4.0 →
instance method
Mutex#lock
mutex.lock → self
thread_sync.c
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VALUE
rb_mutex_lock(VALUE self)
{
return do_mutex_lock(self, 1);
}
Attempts to grab the lock and waits if it isn’t available. Raises ThreadError if mutex was locked by the current thread.