Create a sluice. Optionally specify a clockType indicating the type of the system clock against which the bsls::TimeInterval absTime timeouts passed to the timedWait method are to be interpreted (see {Supported Clock-Types} in the component documentation). If clockType is not specified then the realtime system clock is used. Optionally specify a basicAllocator used to supply memory. If basicAllocator is 0, the currently installed default allocator is used.