How to schedule an IJobEntity after another one in different systems?

[soft berry]

I got this error when trying to read NativeParallelMultiHashMap from another system.

InvalidOperationException: The previously scheduled job UnitSpatialSystem:IndexJob writes to the Unity.Collections.NativeParallelMultiHashMap2[System.Int32,System.Int32] IndexJob.JobData.Map. You are trying to schedule a new job UnitScanSystem:ScanJob, which reads from the same Unity.Collections.NativeParallelMultiHashMap2[System.Int32,System.Int32] (via ScanJob.JobData.Spatial.MMap). To guarantee safety, you must include UnitSpatialSystem:IndexJob as a dependency of the newly scheduled job.

Is there a way to schedule an IJobEntity after another one, even if they are in different systems?

[shy ravine]

if you use some container between systems

put it into singleton component

and get via that singleton

[soft berry]

Yes, it is in a singleton .

[shy ravine]

so just use SystemAPI.GetSingleton to pass it

between systems

[soft berry]

var spatial = SystemAPI.GetSingleton<UnitSpatialSystem.Singleton>(); passing is not problem.

[shy ravine]

it's not about passing, it's about registering dependency on component

[soft berry]

yes

[shy ravine]

which is then passed to schedule of job

[soft berry]

private partial struct ScanJob : IJobEntity, IJobEntityChunkBeginEnd
{
[ReadOnly] public UnitSpatialSystem.Singleton Spatial; }

like this?

[shy ravine]

no

that's not what I meant

but if you don't write to it - you should specify that attribute

[soft berry]

I'm a bit confused.

[shy ravine]

use SystemAPI.GetSingleton/GetSingletonRW in each system that schedules jobs that uses that component (or native containers from that component)

[soft berry]

I finally understand. I will go and give it a try.

It worked. Thank you so much for your invaluable help !!!!!!