Error when reading from Readonly NativeArray from different jobs running same time

Unity Engine
,
1

Hello,

So I have following scenario:

I have a native array defined and initialized in main code. Something like:

public NativeArray<int> myArray;

Then I have 2 jobs defined, something like:

public struct MyJob : IJob
{
            [ReadOnly] public NativeArray<int> data;
            public NativeArray<int> result;

...

}

I’m calling them as follows:

var job1 = new MyJob()
{
data = myArray,
result = myResult1
};

job1.Schedule();

var job2 = new MyJob()
{
data = myArray,
result = myResult2
};

job2.Schedule();

Please note above code is just for reference.

I’m getting an error “The previously scheduled job … writes to the NativeArray data. You are trying to schedule a new job …, which writes to the same NativeArray”.

The question is how can I use same native array just for reading data in different jobs running in parallel? Is it allowed? Or, do I need to copy to a local array and pass it separately for each job? The manual stipulates that “The safety system does allow multiple jobs to read from the same data in parallel.”, but I cannot make it run for some reason.

I’m using Unity 2018.4.2f1

Thanks

2

Use [Unity.Collections.ReadOnly] instead of just [ReadOnly], that might save you some time.