MidiScope/Application/src/main/java/com/example/android/common/midi/EventScheduler.java [214:242]:
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    public SchedulableEvent waitNextEvent() throws InterruptedException {
        SchedulableEvent event = null;
        while (true) {
            long millisToWait = Integer.MAX_VALUE;
            synchronized (lock) {
                if (!mEventBuffer.isEmpty()) {
                    long now = System.nanoTime();
                    long lowestTime = mEventBuffer.firstKey();
                    // Is it time for the earliest list to be processed?
                    if (lowestTime <= now) {
                        event = removeNextEventLocked(lowestTime);
                        break;
                    } else {
                        // Figure out how long to sleep until next event.
                        long nanosToWait = lowestTime - now;
                        // Add 1 millisecond so we don't wake up before it is
                        // ready.
                        millisToWait = 1 + (nanosToWait / NANOS_PER_MILLI);
                        // Clip 64-bit value to 32-bit max.
                        if (millisToWait > Integer.MAX_VALUE) {
                            millisToWait = Integer.MAX_VALUE;
                        }
                    }
                }
                lock.wait((int) millisToWait);
            }
        }
        return event;
    }
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MidiSynth/Application/src/main/java/com/example/android/common/midi/EventScheduler.java [214:242]:
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    public SchedulableEvent waitNextEvent() throws InterruptedException {
        SchedulableEvent event = null;
        while (true) {
            long millisToWait = Integer.MAX_VALUE;
            synchronized (lock) {
                if (!mEventBuffer.isEmpty()) {
                    long now = System.nanoTime();
                    long lowestTime = mEventBuffer.firstKey();
                    // Is it time for the earliest list to be processed?
                    if (lowestTime <= now) {
                        event = removeNextEventLocked(lowestTime);
                        break;
                    } else {
                        // Figure out how long to sleep until next event.
                        long nanosToWait = lowestTime - now;
                        // Add 1 millisecond so we don't wake up before it is
                        // ready.
                        millisToWait = 1 + (nanosToWait / NANOS_PER_MILLI);
                        // Clip 64-bit value to 32-bit max.
                        if (millisToWait > Integer.MAX_VALUE) {
                            millisToWait = Integer.MAX_VALUE;
                        }
                    }
                }
                lock.wait((int) millisToWait);
            }
        }
        return event;
    }
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