Type:
Class
ConditionVariable objects augment class Mutex. Using condition variables, it is possible to suspend while in the middle of a critical section until a resource becomes available.
Example:
require 'thread'
mutex = Mutex.new
resource = ConditionVariable.new
a = Thread.new {
mutex.synchronize {
# Thread 'a' now needs the resource
resource.wait(mutex)
# 'a' can now have the resource
}
}
b = Thread.new {
mutex.synchronize {
# Thread 'b' has finished using the resource
resource.signal
}
}