Is it possible to skip safety checks for specific lines of code?

In my custom render system (replacement for RenderMeshSystemV2) i use

Code (CSharp):

1. values.AsArray().Reinterpret<Matrix4x4>().CopyTo(_matrices);

The _matrices is a Matrix4x4[] of length 1023. The values array contains a variable number of items. In editor i get this exception:

Code (CSharp):

1. source and destination length must be the same

In build it works fine. I assume the safety checks are preventing this code from runnning in editor.

Is there a way to skip the safety checks for specific lines of code?

 

Grab a NativeSlice of _matrices with a length of values and use CopyTo on the slice.

 

_matrices is a managed array (Matrix4x4[]), therefore this doesn't work without conversion and gc alloc.

 

You don't have allocate anything. You can simply make your native container point to the same memory location of your _matrices array.

Something like this should work off top of my head. there is probably an even cleaner way of doing it.

Code (CSharp):

1.  
2. var values = new NativeList<Matrix4x4>(10, Allocator.Temp);
3. var _matrices = new Matrix4x4[1024];
4. fixed (Matrix4x4* address = _matrices)
5. {
6.     var n = NativeArrayUnsafeUtility.ConvertExistingDataToNativeArray<Matrix4x4>(
7.         address,
8.         values.Length, // note uses values.length
9.         Allocator.Invalid);
10. #if ENABLE_UNITY_COLLECTIONS_CHECKS
11.       NativeArrayUnsafeUtility.SetAtomicSafetyHandle(ref n, AtomicSafetyHandle.Create()); // wrap this in safety attribute which
12. #endif
13.  
14.     values.AsArray().Reinterpret<Matrix4x4>().CopyTo(n);
15. }
16.