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java.lang.Object nachos.threads.Alarm
public class Alarm
Uses the hardware timer to provide preemption, and to allow threads to sleep until a certain time.
Constructor Summary | |
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Alarm()
Allocate a new Alarm. |
Method Summary | |
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void |
timerInterrupt()
The timer interrupt handler. |
void |
waitUntil(long x)
Put the current thread to sleep for at least x ticks, waking it up in the timer interrupt handler. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
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public Alarm()
Note: Nachos will not function correctly with more than one alarm.
Method Detail |
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public void timerInterrupt()
public void waitUntil(long x)
(current time) >= (WaitUntil called time)+(x)
x
- the minimum number of clock ticks to wait.Timer.getTime()
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