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Closesize | The number of bytes to allocate. Ensure this size matches the memory required for your data. |
alignment | The alignment for the allocated memory block. |
allocator | The allocator type, such as Allocator.Temp or Allocator.Persistent, indicating how the memory is managed. |
void* A pointer to the allocated memory block. Manage this pointer carefully to prevent memory leaks and ensure proper deallocation.
Allocates a block of memory of a specified size and alignment.
The Malloc
method allocates a block of unmanaged memory. It allows developers to specify the size in bytes and the alignment of the memory block. This method is critical in performance-critical applications where precise memory control is required.
The memory allocated is not initialized to zero. Ensure that you free the allocated memory with UnsafeUtility.Free when it is no longer needed.
using UnityEngine; using Unity.Collections; using Unity.Collections.LowLevel.Unsafe;
public class MallocExample : MonoBehaviour { void Start() { // Specify the number of elements int numElements = 10;
// Allocate memory for an array of integers unsafe { int* array = (int*)UnsafeUtility.Malloc(numElements * sizeof(int), UnsafeUtility.AlignOf<int>(), Allocator.Temp);
// Initialize the array with some values for (int i = 0; i < numElements; i++) { array[i] = i * 2; }
// Output the contents of the array for (int i = 0; i < numElements; i++) { Debug.Log(array[i]); // Expected output: 0, 2, 4, 6, ..., 18 }
// Free the allocated memory UnsafeUtility.Free(array, Allocator.Temp); } } }
Additional resources: UnsafeUtility.MallocTracked, UnsafeUtility.FreeTracked.
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