- Atomics Tutorial
- Atomics - Home
- Atomics - Overview
- Atomics Methods
- Atomics - add
- Atomics - and
- Atomics - compareExchange
- Atomics - exchange
- Atomics - isLockFree
- Atomics - load
- Atomics - notify
- Atomics - or
- Atomics - store
- Atomics - sub
- Atomics - xor
- Atomics Useful Resources
- Atomics - Quick Guide
- Atomics - Useful Resources
- Atomics - Discussion
Atomics - notify() Method
notify method notifies the waiting agent to wake up. notify method can work only with Int32Array created using SharedArrayBuffer. It returns 0 in case of non-shared ArrayBuffer object is used.
Syntax
Atomics.notify(typedArray, index, count)
Parameters
typedArray is a shared Int32Array.
index is position in typedarray to wake up on.
count is the number of sleeping agents to notify.
Return
Returns the number of agents woken up.
Exceptions
TypeError in case passed array is not a integer typed array.
RangeError if index passed is out of bound in typed array.
Example
Following is the code for implementing JavaScript Atomics −
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width, initial-scale=1.0" />
<title>Atomics Example</title>
<style>
.result {
font-size: 20px;
border: 1px solid black;
}
</style>
</head>
<body onLoad="operate();">
<h1>JavaScript Atomics Properties</h1>
<div class="result"></div>
<p>Atomics.store(arr, 0, 5)</p>
<p>Atomics.notify(arr, 0, 1)</p>
<script>
function operate(){
let container = document.querySelector(".result");
// create a SharedArrayBuffer
var buffer = new SharedArrayBuffer(16);
var arr = new Int32Array(buffer);
// Initialise element at zeroth position of array with 6
arr[0] = 6;
container.innerHTML = Atomics.store(arr, 0, 5) + '<br>' + Atomics.notify(arr, 0, 1);
}
</script>
</body>
</html>
Output
Verify the result.
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