Baseline Widely available
The Atomics.notify() static method notifies up some agents that are sleeping in the wait queue.
Note: This operation only works with an Int32Array or BigInt64Array that views a SharedArrayBuffer. It will return 0 on non-shared ArrayBuffer objects.
Atomics.notify(typedArray, index, count)
typedArray
An Int32Array or BigInt64Array that views a SharedArrayBuffer.
index
The position in the typedArray to wake up on.
count Optional
The number of sleeping agents to notify. Defaults to Infinity.
Returns the number of woken up agents, or 0 if typedArray is a view on a non-shared ArrayBuffer.
TypeError
Thrown if typedArray is not an Int32Array or BigInt64Array.
RangeError
Thrown if index is out of bounds in the typedArray.
notify
Given a shared Int32Array:
const sab = new SharedArrayBuffer(1024);
const int32 = new Int32Array(sab);
A reading thread is sleeping and waiting on location 0 because the provided value matches what is stored at the provided index. The reading thread will not move on until the writing thread has called Atomics.notify() on position 0 of the provided typedArray. Note that if, after being woken up, the value of location 0 has not been changed by the writing thread, the reading thread will not go back to sleep, but will continue on.
Atomics.wait(int32, 0, 0);
console.log(int32[0]); // 123
A writing thread stores a new value and notifies the waiting thread once it has written:
console.log(int32[0]); // 0;
Atomics.store(int32, 0, 123);
Atomics.notify(int32, 0, 1);
RetroSearch is an open source project built by @garambo | Open a GitHub Issue
Search and Browse the WWW like it's 1997 | Search results from DuckDuckGo
HTML:
3.2
| Encoding:
UTF-8
| Version:
0.7.4