IJobForEach_B - Dynamic Buffer is write only

Like the title says, I can't read the length of my dynamic buffer in IJobForEach_B or IJobForEachWithEntity_EB. This code:

Code (CSharp):

1.  
2.  
3. [Serializable]
4. [InternalBufferCapacity(4)]
5. public struct CollisionBuffer : IBufferElementData
6. {
7.     public Entity value;
8.     public static implicit operator Entity(CollisionBuffer col) { return col.value; }
9.     public static implicit operator CollisionBuffer(Entity e) { return new CollisionBuffer { value = e }; }
10. }
11.  
12. public class DynamicBufferJobTest : JobComponentSystem
13. {
14.     struct ProcessBuffers : IJobForEach_B<CollisionBuffer>
15.     {
16.         public void Execute( [ReadOnly] DynamicBuffer<CollisionBuffer> b0)
17.         {
18.             if( b0.Length == 0 )
19.             {
20.  
21.             }
22.         }
23.     }
24.  
25.     protected override JobHandle OnUpdate(JobHandle job)
26.     {
27.         job = new ProcessBuffers
28.         {
29.         }.Schedule(this, job);
30.  
31.         return job;
32.     }
33.    
34. }

Produces this error:

InvalidOperationException: The native container has been declared as [WriteOnly] in the job, but you are reading from it.

Is it supposed to work this way?

 

that looks like a bug. It seems the [ReadOnly] attribute isn't correctly respected yet.

 

Fair enough, back to using BufferFromEntity for now I guess

 

I just encountered this with IJobForEachWithEntity_EBBC version as well(not using any attributes but getting the write only error)

 

Replace all BufferFromEntity with IJobForeach_B, otherwise it will throw this error.

 

?? The whole point is I was trying to stop using BufferFromEntity. The error occurs in my original post as it was written.

 

I had this problem as well. Replaced every IJobForEachWithEntity implementation with IJobForeach_B started to work normally with no crashes or exceptions.

 

Oh you mean replace it in every single job for a project, I see. Good to know that works but I'm assuming that's still a bug and not at all intended

 

Doesn't do anything for me. Both IJobForEach and IJobForEachWithEntity throw the error.

 

.AsNativeArray() creates the same error as .Length --- this should also be possible in ReadOnly mode

 

Hi @AriaBonczek -- hate to be a nudge, but I was wondering if there's an ETA on a fix for this, or if I should start changing my jobs back to using BufferFromEntity. Thanks!