JavaScript Atomics notify() Method
Last Updated :
22 May, 2023
The Atomics.notify() is an in-built method in JavaScript that is used to notify some agents that are sleeping in the wait queue. The Atomics.notify() method returns a number of woken-up agents. The integer-typed array, index, and count are passed as an argument to the function.
Syntax:
Atomics.notify(typedArray, index, count)
Parameters: This method accepts three parameters as mentioned above and described below:
- typedarray: This parameter specifies a shared integer typed array Int16Array.
- index: This parameter specifies the position in the array, typedArray to wait on.
- count: This parameter counts the number of sleeping agents to notify. Its default value is +Infinity.
Return value: The Atomics.notify() method returns the number of woken-up agents.
The below programs illustrate the Atomics.notify() method in JavaScript:
Example 1: In this example, we will see the use of the Atomics.notify() method in JavaScript.
javascript
<script>
const sab = new SharedArrayBuffer(1024);
const int32 = new Int32Array(sab);
int32[0] = 77;
console.log(int32[0]);
console.log(Atomics.store(int32, 0, 123));
console.log(Atomics.notify(int32, 0, 1));
</script>
|
Output:
77
123
0
Example 2: In this example, we will see the use of the Atomics.notify() method in JavaScript.
javascript
<script>
const sab = new SharedArrayBuffer(1024);
const int32 = new Int32Array(sab);
int32[0] = 77;
console.log(Atomics.load(int32, 66));
console.log(int32[0]);
console.log(Atomics.store(int32, 0, 123));
console.log(Atomics.notify(int32, 6, 1));
console.log(int32[0]);
</script>
|
Output:
0
77
123
0
123
Exceptions:
- If the typedArray is not a shared Int32Array then the Atomics.notify( ) operation throws a TypeError.
- If the index is used as an argument to the Atomics.notify() operation is out of the bound in the typedArray then the Atomics.store( ) operation throws a RangeError.
We have a complete list of Javascript Atomics methods, to check those please go through the Javascript Atomics Complete Reference article.
Supported Browser:
- Google Chrome
- Microsoft Edge
- Firefox
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