21 lines
580 B
C++
21 lines
580 B
C++
// Excerpt from the ApicTimer interrupt handler
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void ApicTimer::trigger(const InterruptFrame &frame) {
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if (cpuId != LocalApic::getId()) {
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// Abort if the handler doesn't belong to the current CPU
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return;
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}
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// Increase the "core-local" time
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time.addNanoseconds(timerInterval * 1'000'000); // Interval is in milliseconds
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// Only the BSP may continue
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if (cpuId != 0) {
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return;
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}
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// BSP triggers preemption
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if (time.toMilliseconds() % yieldInterval == 0) {
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System::getService<SchedulerService>().yield();
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}
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}
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