In one execution form, it can provide the timer unit which is programmed in time interval or ueikuatsupuintabaru which is selected. The processor executes the event waiting instruction, enters into electrical state low and vis-a-vis the thread which includes that instruction. Timer unit the signal does the timer event in the end of ueikuatsupuintabaru, and the processor, responding to that timer event, comes out of electrical state low. The thread continues execution in the instruction which follows to the event waiting instruction. In one execution form, until processor/timer unit is used, although it materializes converts control of electric power type lock acquisition mechanism, here, the processor, being able to make many times awake, checks the lock, when and the lock has not been less crowded, executes the event waiting instruction, after that, the lock is less crowded, the thread blocks. Selective figure Figure 6
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