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Ensures thread safety of usages of bestEffortLock.

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This commit is contained in:
Thomas Harte 2018-02-18 22:09:03 -05:00
parent a005dabbe3
commit 7d75e864b1
1 changed files with 17 additions and 3 deletions
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20
OSBindings/Mac/Clock Signal/Documents/MachineDocument.swift
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@ -18,8 +18,10 @@ class MachineDocument:
CSBestEffortUpdaterDelegate,
CSAudioQueueDelegate
{
lazy var actionLock = NSLock()
lazy var drawLock = NSLock()
fileprivate let actionLock = NSLock()
fileprivate let drawLock = NSLock()
fileprivate let bestEffortLock = NSLock()
var machine: CSMachine!
var name: String! {
get {
@ -77,7 +79,9 @@ class MachineDocument:
}
func machineDidChangeClockIsUnlimited(_ machine: CSMachine!) {
bestEffortLock.lock()
self.bestEffortUpdater?.runAsUnlimited = machine.clockIsUnlimited
bestEffortLock.unlock()
}
fileprivate func setupClockRate() {
@ -91,20 +95,24 @@ class MachineDocument:
self.machine.setAudioSamplingRate(selectedSamplingRate, bufferSize:audioQueue.preferredBufferSize)
}
bestEffortLock.lock()
self.bestEffortUpdater?.clockRate = self.machine.clockRate
bestEffortLock.unlock()
}
override func close() {
optionsPanel?.setIsVisible(false)
optionsPanel = nil
openGLView.delegate = nil
bestEffortLock.lock()
bestEffortUpdater!.delegate = nil
bestEffortUpdater = nil
bestEffortLock.unlock()
actionLock.lock()
drawLock.lock()
machine = nil
openGLView.delegate = nil
openGLView.invalidate()
actionLock.unlock()
drawLock.unlock()
@ -148,6 +156,7 @@ class MachineDocument:
}
func runForNumberOfCycles(_ numberOfCycles: Int32) {
bestEffortLock.lock()
if let bestEffortUpdater = bestEffortUpdater {
let cyclesToRunFor = min(numberOfCycles, Int32(bestEffortUpdater.clockRate / 10))
if actionLock.try() {
@ -155,15 +164,19 @@ class MachineDocument:
actionLock.unlock()
}
}
bestEffortLock.unlock()
}
// MARK: CSAudioQueueDelegate
final func audioQueueIsRunningDry(_ audioQueue: CSAudioQueue) {
bestEffortLock.lock()
bestEffortUpdater?.update()
bestEffortLock.unlock()
}
// MARK: CSOpenGLViewDelegate
final func openGLView(_ view: CSOpenGLView, drawViewOnlyIfDirty onlyIfDirty: Bool) {
bestEffortLock.lock()
if let bestEffortUpdater = bestEffortUpdater {
bestEffortUpdater.update()
if drawLock.try() {
@ -171,6 +184,7 @@ class MachineDocument:
drawLock.unlock()
}
}
bestEffortLock.unlock()
}
final func openGLView(_ view: CSOpenGLView, didReceiveFileAt URL: URL) {