Struct UnsafeList<T>

An managed, resizable list, without any thread safety check features.

Namespace: Unity.Collections.LowLevel.Unsafe
Syntax
public struct UnsafeList<T> : IDisposable where T : struct
Type Parameters
Name Description
T

Source type of elements

Constructors

UnsafeList(T*, Int32)

Constructs list as view into memory.

Declaration
public UnsafeList(T*ptr, int length)
Parameters
Type Name Description
T* ptr
Int32 length

UnsafeList(Int32, Allocator, NativeArrayOptions)

Constructs a new list using the specified type of memory allocation.

Declaration
public UnsafeList(int initialCapacity, Allocator allocator, NativeArrayOptions options = null)
Parameters
Type Name Description
Int32 initialCapacity
Allocator allocator

A member of the Unity.Collections.Allocator enumeration.
NativeArrayOptions options

Memory should be cleared on allocation or left uninitialized.
Remarks

The list initially has a capacity of one. To avoid reallocating memory for the list, specify sufficient capacity up front.

Fields

Allocator

Declaration
public Allocator Allocator
Field Value
Type Description
Allocator

Capacity

Declaration
public int Capacity
Field Value
Type Description
Int32

Length

Declaration
public int Length
Field Value
Type Description
Int32

Ptr

Declaration
public T*Ptr
Field Value
Type Description
T*

Properties

IsCreated

Reports whether memory for the container is allocated.

Declaration
public bool IsCreated { get; }
Property Value
Type Description
Boolean

True if this container object's internal storage has been allocated.
Remarks

Note that the container storage is not created if you use the default constructor. You must specify at least an allocation type to construct a usable container.

Methods

Add(T)

Adds an element to the list.

Declaration
public void Add(T value)
Parameters
Type Name Description
T value

The struct to be added at the end of the list.

AddNoResize(T)

Adds an element to the container.

Declaration
public void AddNoResize(T value)
Parameters
Type Name Description
T value

The value to be added at the end of the container.
Remarks

If the list has reached its current capacity, internal array won't be resized, and exception will be thrown.

AddRange(UnsafeList<T>)

Adds the elements of a UnsafePtrList to this list.

Declaration
public void AddRange(UnsafeList<T> src)
Parameters
Type Name Description
UnsafeList<T> src

AddRangeNoResize(Void*, Int32)

Adds the elements to this container.

Declaration
public void AddRangeNoResize(void *ptr, int length)
Parameters
Type Name Description
Void* ptr

A pointer to the buffer.
Int32 length

The number of elements to add to the list.
Remarks

If the list has reached its current capacity, internal array won't be resized, and exception will be thrown.

AddRangeNoResize(UnsafeList<T>)

Adds elements from a list to this container.

Declaration
public void AddRangeNoResize(UnsafeList<T> list)
Parameters
Type Name Description
UnsafeList<T> list

Other container to copy elements from.
Remarks

If the list has reached its current capacity, internal array won't be resized, and exception will be thrown.

AsParallelReader()

Returns parallel reader instance.

Declaration
public UnsafeList<T>.ParallelReader AsParallelReader()
Returns
Type Description
UnsafeList.ParallelReader<>

AsParallelWriter()

Declaration
public UnsafeList<T>.ParallelWriter AsParallelWriter()
Returns
Type Description
UnsafeList.ParallelWriter<>

Clear()

Clears the container.

Declaration
public void Clear()
Remarks

List Capacity remains unchanged.

Dispose()

Disposes of this container and deallocates its memory immediately.

Declaration
public void Dispose()

Dispose(JobHandle)

Safely disposes of this container and deallocates its memory when the jobs that use it have completed.

Declaration
public JobHandle Dispose(JobHandle inputDeps)
Parameters
Type Name Description
JobHandle inputDeps
Returns
Type Description
JobHandle

A new job handle containing the prior handles as well as the handle for the job that deletes the container.
Remarks

You can call this function dispose of the container immediately after scheduling the job. Pass the JobHandle returned by the Job.Schedule method using the jobHandle parameter so the job scheduler can dispose the container after all jobs using it have run.

RemoveAtSwapBack(Int32)

Truncates the list by replacing the item at the specified index with the last item in the list. The list is shortened by one.

Declaration
public void RemoveAtSwapBack(int index)
Parameters
Type Name Description
Int32 index

The index of the item to delete.

Resize(Int32, NativeArrayOptions)

Changes the list length, resizing if necessary.

Declaration
public void Resize(int length, NativeArrayOptions options = null)
Parameters
Type Name Description
Int32 length

The new length of the list.
NativeArrayOptions options

Memory should be cleared on allocation or left uninitialized.

SetCapacity(Int32)

Set the number of items that can fit in the list.

Declaration
public void SetCapacity(int capacity)
Parameters
Type Name Description
Int32 capacity

The number of items that the list can hold before it resizes its internal storage.

TrimExcess()

Sets the capacity to the actual number of elements in the container.

Declaration
public void TrimExcess()

Extension Methods