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// This file is only included because the Unity.Jobs package is currently experimental and it seems bad to rely on it.
// The Unity.Jobs version of this interface will be used when it is stable.
using System;
using Unity.Jobs.LowLevel.Unsafe;
using Unity.Collections.LowLevel.Unsafe;
using Unity.Jobs;
namespace Pathfinding.Jobs {
[JobProducerType(typeof(JobParallelForBatchedExtensions.ParallelForBatchJobStruct<>))]
public interface IJobParallelForBatched {
bool allowBoundsChecks { get; }
void Execute(int startIndex, int count);
}
public static class JobParallelForBatchedExtensions {
internal struct ParallelForBatchJobStruct<T> where T : struct, IJobParallelForBatched {
static public IntPtr jobReflectionData;
public static IntPtr Initialize () {
if (jobReflectionData == IntPtr.Zero) {
#if UNITY_2020_2_OR_NEWER
jobReflectionData = JobsUtility.CreateJobReflectionData(typeof(T), (ExecuteJobFunction)Execute, null, null);
#else
jobReflectionData = JobsUtility.CreateJobReflectionData(typeof(T), JobType.ParallelFor, (ExecuteJobFunction)Execute);
#endif
}
return jobReflectionData;
}
public delegate void ExecuteJobFunction(ref T data, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, ref JobRanges ranges, int jobIndex);
public unsafe static void Execute (ref T jobData, System.IntPtr additionalPtr, System.IntPtr bufferRangePatchData, ref JobRanges ranges, int jobIndex) {
while (true) {
int begin;
int end;
if (!JobsUtility.GetWorkStealingRange(ref ranges, jobIndex, out begin, out end))
return;
#if ENABLE_UNITY_COLLECTIONS_CHECKS
if (jobData.allowBoundsChecks) JobsUtility.PatchBufferMinMaxRanges(bufferRangePatchData, UnsafeUtility.AddressOf(ref jobData), begin, end - begin);
#endif
jobData.Execute(begin, end - begin);
}
}
}
unsafe static public JobHandle ScheduleBatch<T>(this T jobData, int arrayLength, int minIndicesPerJobCount, JobHandle dependsOn = new JobHandle()) where T : struct, IJobParallelForBatched {
#if UNITY_2020_2_OR_NEWER
// This was renamed in Unity 2020.2
var scheduleMode = ScheduleMode.Parallel;
#else
var scheduleMode = ScheduleMode.Batched;
#endif
var scheduleParams = new JobsUtility.JobScheduleParameters(UnsafeUtility.AddressOf(ref jobData), ParallelForBatchJobStruct<T>.Initialize(), dependsOn, scheduleMode);
return JobsUtility.ScheduleParallelFor(ref scheduleParams, arrayLength, minIndicesPerJobCount);
}
unsafe static public void RunBatch<T>(this T jobData, int arrayLength) where T : struct, IJobParallelForBatched {
var scheduleParams = new JobsUtility.JobScheduleParameters(UnsafeUtility.AddressOf(ref jobData), ParallelForBatchJobStruct<T>.Initialize(), new JobHandle(), ScheduleMode.Run);
JobsUtility.ScheduleParallelFor(ref scheduleParams, arrayLength, arrayLength);
}
}
}
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