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fix: fixed possible null pointer crash when reading CPU frequency

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This commit is contained in:
Serhiy Mytrovtsiy
2025-03-03 19:18:43 +01:00
parent 574769c7f8
commit feabfe6894
1 changed files with 8 additions and 5 deletions
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15
Modules/CPU/readers.swift
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@@ -416,19 +416,22 @@ public class FrequencyReader: Reader<[Double]> {
let duration = 500
let step = UInt64(duration / self.measurementCount)
var samples = [([IOSample], TimeInterval)]()
guard var prev = self.prev ?? self.getSample() else { return samples }
guard let initialSample = self.getSample() else { return samples }
var prev = self.prev ?? initialSample
for _ in 0..<self.measurementCount {
let milliseconds = UInt64(step) * 1_000_000
try? await Task.sleep(nanoseconds: milliseconds)
guard let next = self.getSample() else { continue }
guard let diff = IOReportCreateSamplesDelta(prev.samples, next.samples, nil)?.takeRetainedValue() else {
continue
}
let elapsed = Date(timeIntervalSince1970: next.time).timeIntervalSince(Date(timeIntervalSince1970: prev.time))
prev = next
if let diffCF = IOReportCreateSamplesDelta(prev.samples, next.samples, nil) {
let diff = diffCF.takeRetainedValue()
let elapsed = next.time - prev.time
samples.append((self.collectIOSamples(data: diff), max(elapsed, TimeInterval(1))))
}
prev = next
}
self.prev = prev
return samples