What is Atomics?
- Atomics are used with SharedArrayBuffer(generic fixed-length binary data buffer) objects.
- Atomics are not constructors like other global objects.
- Atomics cannot be used with a new operator or can be invoked as a function.
Multiple threads can read and write the same data in memory when there shared memory is. To ensure that predicted values are written and read accurately, another operation cannot start until and unless the current one finishes. Atomic operations also cannot be interrupted.
- Among the Atomic Operations, there is a an inbuilt operation Atomics.load() that is used to return a value which is residing at a given position in an array.
- The integer typedarray and the index of the value are passed as an argument to the function.
- Atomics.load() returns the value at the given position of the array.
- typedarray: It is the shared integer typed array you want to modify.
- index: It is the position in the typedArray from where you want to load a value.
Atomics.load() returns the value at the given position (typedArray[index]).
Examples of the above function are provided below.
Input : arr = 9; Atomics.load(arr, 0); Output : 9 Input : arr = 3; Atomics.add(arr, 0, 2) Atomics.load(arr, 0); Output : 5
Codes for the above function are provided below.
3 3 5
- If the typedArray is not one of the allowed integer types then the Atomics.load( ) operation throws a TypeError.
- If the typedArray is not a shared typed array then the Atomics.load( ) operation throws a TypeError.
- If the index used as an argument to the Atomics.load( ) operation is out of the bound in the typedArray then the Atomics.load( ) operation throws a RangeError.