threading.Event

Creates a thread event object, which is used for synchronization between threads, allowing one thread to wait for notification or signal from another thread.

    
    
    
Event()

Examples

Two concurrent threads accessing shared resources.

    javascript
    
    
function consumer(productionQuantity, dict, pEvent, cEvent) {
    for (var i = 0; i < productionQuantity; i++) {
        while (dict.get("array").length == 0) {
            pEvent.wait()
        }
        if (pEvent.isSet()) {
            pEvent.clear()
        }

        var arr = dict.get("array")
        var count = arr.shift()
        dict.set("array", arr)
        Log("consumer:", count, ", array:", arr)
        cEvent.set()
        Sleep(1000)
    }
}

function producer(productionQuantity, dict, pEvent, cEvent) {
    for (var i = 0; i < productionQuantity; i++) {
        while (dict.get("array").length != 0) {
            cEvent.wait()
        }
        if (cEvent.isSet()) {
            cEvent.clear()
        }

        var arr = dict.get("array")
        arr.push(i)
        dict.set("array", arr)
        Log("producer:", i, ", array:", arr)
        pEvent.set()
        Sleep(1000)
    }
}

function main() {
    var dict = threading.Dict()
    dict.set("array", [])
    var pEvent = threading.Event()
    var cEvent = threading.Event()
    var productionQuantity = 10
    var producerThread = threading.Thread(producer, productionQuantity, dict, pEvent, cEvent)
    var consumerThread = threading.Thread(consumer, productionQuantity, dict, pEvent, cEvent)

    consumerThread.join()
    producerThread.join()
}

Returns

See Also

Remarks

Supports backtesting system and live trading environment.