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Determine if only one instance is running: Difference between revisions
Determine if only one instance is running (view source)
Revision as of 17:45, 1 March 2015
, 9 years agoadd swift
(Nimrod -> Nim) |
(add swift) |
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Line 786:
Sys.sleep(20);
say 'Done!';</lang>
=={{header|Swift}}==
Uses NSDistributedNotificationCenter. Works with Swift 1.2.
<lang Swift>import Foundation
let globalCenter = NSDistributedNotificationCenter.defaultCenter()
let time = NSDate().timeIntervalSince1970
globalCenter.addObserverForName("OnlyOne", object: nil, queue: NSOperationQueue.mainQueue()) {not in
if let senderTime = not.userInfo?["time"] as? NSTimeInterval where senderTime != time {
println("More than one running")
exit(0)
} else {
println("Only one")
}
}
func send() {
globalCenter.postNotificationName("OnlyOne", object: nil, userInfo: ["time": time])
let waitTime = dispatch_time(DISPATCH_TIME_NOW, Int64(3 * NSEC_PER_SEC))
dispatch_after(waitTime, dispatch_get_main_queue()) {
send()
}
}
send()
CFRunLoopRun()</lang>
=={{header|Tcl}}==
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