A game about forced loneliness, made by TACStudios
tacstudios.tngl.sh
1using Unity.Collections;
2using Unity.Jobs;
3
4namespace Doc.CodeSamples.Collections.Tests
5{
6 class AliasingExample
7 {
8 public void foo()
9 {
10 #region allocation_aliasing
11 NativeList<int> nums = new NativeList<int>(10, Allocator.TempJob);
12 nums.Length = 5;
13
14 // Create an array of 5 ints that aliases the content of the list.
15 NativeArray<int> aliasedNums = nums.AsArray();
16
17 // Modify the first element of both the array and the list.
18 aliasedNums[0] = 99;
19
20 // Only the original need be disposed.
21 nums.Dispose();
22
23 // Throws an ObjectDisposedException because disposing
24 // the original deallocates the aliased memory.
25 aliasedNums[0] = 99;
26 #endregion
27 }
28
29 public void foo2()
30 {
31 #region allocation_reinterpretation
32 NativeArray<int> ints = new NativeArray<int>(10, Allocator.Temp);
33
34 // Length of the reinterpreted array is 20
35 // (because it has two shorts per one int of the original).
36 NativeArray<short> shorts = ints.Reinterpret<int, short>();
37
38 // Modifies the first 4 bytes of the array.
39 shorts[0] = 1;
40 shorts[1] = 1;
41
42 int val = ints[0]; // val is 65537 (2^16 + 2^0)
43
44 // Like with other aliased collections, only the original
45 // needs to be disposed.
46 ints.Dispose();
47
48 // Throws an ObjectDisposedException because disposing
49 // the original deallocates the aliased memory.
50 shorts[0] = 1;
51 #endregion
52 }
53
54 public void foo3()
55 {
56 #region allocation_dispose_job
57 NativeArray<int> nums = new NativeArray<int>(10, Allocator.TempJob);
58
59 // Create and schedule a job that uses the array.
60 ExampleJob job = new ExampleJob { Nums = nums };
61 JobHandle handle = job.Schedule();
62
63 // Create and schedule a job that will dispose the array after the ExampleJob has run.
64 // Returns the handle of the new job.
65 handle = nums.Dispose(handle);
66 #endregion
67 }
68 }
69
70 struct ExampleJob : IJob
71 {
72 public NativeArray<int> Nums;
73 public void Execute()
74 {
75 throw new System.NotImplementedException();
76 }
77 }
78
79}