public static unsafe void GetJobRange(ref JobRanges ranges, int jobIndex, out int beginIndex, out int endIndex)
{
int *startEndIndices = (int *)ranges.StartEndIndex;
beginIndex = startEndIndices[jobIndex * 2];
endIndex = startEndIndices[jobIndex * 2 + 1];
}
public unsafe static void GetJobRange(ref JobRanges ranges, int jobIndex, out int beginIndex, out int endIndex)
{
int *ptr = (int *)((void *)ranges.StartEndIndex);
beginIndex = ptr[jobIndex * 2];
endIndex = ptr[jobIndex * 2 + 1];
}
// TODO: Currently, the actual work stealing code sits in (big) Unity's native code w/ some dependencies
// For now, let's simply split the work for each thread over the number of job threads
public static bool GetWorkStealingRange(ref JobRanges ranges, int jobIndex, out int begin, out int end)
{
#if UNITY_SINGLETHREADED_JOBS
// IndicesPerPhase is used as a "done" flag.
bool done = ranges.IndicesPerPhase == 0;
begin = 0;
end = ranges.ArrayLength;
ranges.IndicesPerPhase = 0;
return(!done);
#else
begin = jobIndex * ranges.IndicesPerPhase;
end = Math.Min(begin + ranges.IndicesPerPhase, ranges.ArrayLength);
ranges.IndicesPerPhase = 0;
return(begin < end);
#endif
}
// TODO: Currently, the actual work stealing code sits in (big) Unity's native code w/ some dependencies
// This is implemented trying to use the same code pattern:
// while (true)
// {
// if (!JobsUtility.GetWorkStealingRange(ref ranges, jobIndex, out int begin, out int end))
// break;
public static bool GetWorkStealingRange(ref JobRanges ranges, int jobIndex, out int begin, out int end)
{
if (ranges.State == WorkStealingState.Done)
{
begin = 0;
end = 0;
return(false);
}
#if !UNITY_SINGLETHREADED_JOBS
if (ranges.runOnMainThread > 0)
{
#endif
// There's only one thread, and the IndicesPerPhase don't have much meaning.
// Do everything in one block of work.
begin = 0;
end = ranges.ArrayLength;
ranges.State = WorkStealingState.Done;
return(end > begin);
#if !UNITY_SINGLETHREADED_JOBS
}
// Divide the work equally.
// TODO improve by accounting for the indices per phase.
int nWorker = JobWorkerCount > 0 ? JobWorkerCount : 1;
begin = jobIndex * ranges.ArrayLength / nWorker;
end = (jobIndex + 1) * ranges.ArrayLength / nWorker;
if (end > ranges.ArrayLength)
{
end = ranges.ArrayLength;
}
if (jobIndex == nWorker - 1)
{
end = ranges.ArrayLength;
}
ranges.State = WorkStealingState.Done;
return(end > begin);
#endif
}
public static extern bool GetWorkStealingRange(ref JobRanges ranges, int jobIndex, out int beginIndex, out int endIndex);
static extern unsafe void invoke_managed_job_execute_function(IntPtr functionPointer, void *payLoad, IntPtr additionalPtr, IntPtr bufferRangePatchData, ref JobRanges ranges, int jobIndex);
public static bool GetWorkStealingRange(ref JobRanges ranges, int jobIndex, out int begin, out int end) => throw new NotImplementedException();