51 lines
1.0 KiB
Swift
51 lines
1.0 KiB
Swift
//
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// Timer.swift
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// FirebladeECS
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//
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// Created by Christian Treffs on 28.10.17.
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//
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import Darwin.Mach.mach_time
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public struct Timer {
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private let numerator: UInt64
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private let denominator: UInt64
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private var startTime: UInt64 = 0
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private var stopTime: UInt64 = 0
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public init() {
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var timeBaseInfo = mach_timebase_info.init(numer: 0, denom: 0 )
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let success: kern_return_t = mach_timebase_info(&timeBaseInfo)
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assert(KERN_SUCCESS == success)
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numerator = UInt64(timeBaseInfo.numer)
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denominator = UInt64(timeBaseInfo.denom)
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}
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public mutating func start() {
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startTime = mach_absolute_time()
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}
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public mutating func stop() {
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stopTime = mach_absolute_time()
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}
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public mutating func reset() {
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startTime = 0
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stopTime = 0
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}
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public var nanoSeconds: UInt64 {
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return ((stopTime - startTime) * numerator) / denominator
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}
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public var microSeconds: Double {
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return Double(nanoSeconds) / 1.0e3
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}
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public var milliSeconds: Double {
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return Double(nanoSeconds) / 1.0e6
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}
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public var seconds: Double {
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return Double(nanoSeconds) / 1.0e9
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}
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}
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