Struct UnsafeList<T>

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

Namespace: Unity.Collections.LowLevel.Unsafe

Syntax

public struct UnsafeList<T> : INativeDisposable, IDisposable, INativeList<T>, IEnumerable<T>, IEnumerable 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	Pointer to data.
Int32	length	Lenght of data in bytes.

UnsafeList(Int32, Allocator, NativeArrayOptions)

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

Declaration

public UnsafeList(int initialCapacity, Allocator allocator, NativeArrayOptions options = NativeArrayOptions.UninitializedMemory)

Parameters

Type	Name	Description
Int32	initialCapacity	The initial capacity of the list. If the list grows larger than its capacity, the internal array is copied to a new, larger array.
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.

UnsafeList(Int32, AllocatorManager.AllocatorHandle, NativeArrayOptions)

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

Declaration

public UnsafeList(int initialCapacity, AllocatorManager.AllocatorHandle allocator, NativeArrayOptions options = NativeArrayOptions.UninitializedMemory)

Parameters

Type	Name	Description
Int32	initialCapacity	The initial capacity of the list. If the list grows larger than its capacity, the internal array is copied to a new, larger array.
AllocatorManager.AllocatorHandle	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 AllocatorManager.AllocatorHandle Allocator

Field Value

Type	Description
AllocatorManager.AllocatorHandle

capacity

Declaration

public int capacity

Field Value

Type	Description
Int32

length

Declaration

public int length

Field Value

Type	Description
Int32

Ptr

Declaration

[NativeDisableUnsafePtrRestriction]
public T*Ptr

Field Value

Type	Description
T*

Properties

Capacity

Declaration

public int Capacity { get; set; }

Property Value

Type	Description
Int32

Implements

INativeList<T>.Capacity

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.

IsEmpty

Reports whether container is empty.

Declaration

public bool IsEmpty { get; }

Property Value

Type	Description
Boolean	True if this container empty.

Implements

INativeList<T>.IsEmpty

Item[Int32]

Declaration

public T this[int index] { get; set; }

Parameters

Type	Name	Description
Int32	index

Property Value

Type	Description
T

Implements

INativeList<T>.Item[Int32]

Length

Declaration

public int Length { get; set; }

Property Value

Type	Description
Int32

Implements

INativeList<T>.Length

Methods

Add(T)

Adds an element to the list.

Declaration

public void Add(in 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(Void*, Int32)

Adds elements from a buffer to this list.

Declaration

public void AddRange(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.

AddRange(UnsafeList<T>)

Adds the elements of a UnsafePtrList to this list.

Declaration

public void AddRange(UnsafeList<T> list)

Parameters

Type	Name	Description
UnsafeList<T>	list	Other container to copy elements from.

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 container.

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<>	Parallel reader instance.

AsParallelWriter()

Returns parallel writer instance.

Declaration

public UnsafeList<T>.ParallelWriter AsParallelWriter()

Returns

Type	Description
UnsafeList.ParallelWriter<>	Parallel writer instance.

Clear()

Clears the container.

Declaration

public void Clear()

Implements

INativeList<T>.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	The job handle or handles for any scheduled jobs that use this container.

Returns

Type	Description
JobHandle	A new job handle containing the prior handles as well as the handle for the job that deletes the container.

Implements

INativeDisposable.Dispose(JobHandle)

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.

ElementAt(Int32)

Declaration

public T ElementAt(int index)

Parameters

Type	Name	Description
Int32	index

Returns

Type	Description
T

Implements

INativeList<T>.ElementAt(Int32)

InsertRangeWithBeginEnd(Int32, Int32)

Inserts a number of items into a container at a specified zero-based index.

Declaration

public void InsertRangeWithBeginEnd(int begin, int end)

Parameters

Type	Name	Description
Int32	begin	The zero-based index at which the new elements should be inserted.
Int32	end	The zero-based index just after where the elements should be removed.

Exceptions

Type	Condition
ArgumentException	Thrown if end argument is less than begin argument.
ArgumentOutOfRangeException	Thrown if begin or end arguments are not positive or out of bounds.

RemoveAt(Int32)

Truncates the list by removing the item at the specified index, and shifting all remaining items to replace removed item. The list is shortened by one.

Declaration

public void RemoveAt(int index)

Parameters

Type	Name	Description
Int32	index	The index of the item to delete.

Remarks

This method of removing item is useful only in case when list is ordered and user wants to preserve order in list after removal In majority of cases is not important and user should use more performant RemoveAtSwapBack.

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.

RemoveRangeSwapBackWithBeginEnd(Int32, Int32)

Truncates the list by replacing the item at the specified index range with the items from the end the list. The list is shortened by number of elements in range.

Declaration

public void RemoveRangeSwapBackWithBeginEnd(int begin, int end)

Parameters

Type	Name	Description
Int32	begin	The first index of the item to remove.
Int32	end	The index past-the-last item to remove.

Exceptions

Type	Condition
ArgumentException	Thrown if end argument is less than begin argument.
ArgumentOutOfRangeException	Thrown if begin or end arguments are not positive or out of bounds.

RemoveRangeWithBeginEnd(Int32, Int32)

Truncates the list by removing the items at the specified index range, and shifting all remaining items to replace removed items. The list is shortened by number of elements in range.

Declaration

public void RemoveRangeWithBeginEnd(int begin, int end)

Parameters

Type	Name	Description
Int32	begin	The first intex of the item to remove.
Int32	end	The index past-the-last item to remove.

Remarks

This method of removing item(s) is useful only in case when list is ordered and user wants to preserve order in list after removal In majority of cases is not important and user should use more performant RemoveRangeSwapBackWithBeginEnd.

Exceptions

Type	Condition
ArgumentException	Thrown if end argument is less than begin argument.
ArgumentOutOfRangeException	Thrown if begin or end arguments are not positive or out of bounds.

Resize(Int32, NativeArrayOptions)

Changes the list length, resizing if necessary.

Declaration

public void Resize(int length, NativeArrayOptions options = NativeArrayOptions.UninitializedMemory)

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

NativeSortExtension.Sort<T, U>(UnsafeList<T>, U)

UnsafeListExtensions.IndexOf<T, U>(UnsafeList<T>, U)

UnsafeListExtensions.Contains<T, U>(UnsafeList<T>, U)