/// <summary>
/// [64bit Only] Use in environments with more than 64 logical processors
/// </summary>
public static unsafe void SetCurrentThreadAffinityW64(int __absolute__processors_index)
{
int g_cnt = __absolute__processors_index >> 6,
i = 0;
IntPtr handle = GetCurrentThread();
GROUP_AFFINITY ptr_temp;
while (i < g_cnt)
{
ptr_temp = new GROUP_AFFINITY(UIntPtr.Zero, i++);
SetThreadGroupAffinity(handle, &ptr_temp, null);
}
ptr_temp = new GROUP_AFFINITY(
(UIntPtr)Mask(__absolute__processors_index & 0x3F),
g_cnt);
SetThreadGroupAffinity(handle, &ptr_temp, null);
g_cnt = Environment.ProcessorCount >> 6;
while (i < g_cnt)
{
ptr_temp = new GROUP_AFFINITY(UIntPtr.Zero, i++);
SetThreadGroupAffinity(handle, &ptr_temp, null);
}
}
#pragma warning disable IDE1006 // 명명 스타일
private static unsafe void __SetGroupAffinity(int hc, int lc, uint hc_sel, uint lc_sel)
{
IntPtr handle = GetCurrentThread();
GROUP_AFFINITY ptr_temp;
int ptr0_index = 0;
// low position cores
int g_idx = lc >> 6;
while (--g_idx >= 0)
{
ptr_temp = new GROUP_AFFINITY((UIntPtr)(ulong.MaxValue * lc_sel), ptr0_index++);
SetThreadGroupAffinity(handle, &ptr_temp, null);
}
// pc 중첩 요구 공간 vs ec 차지 후 잉여 공간
int _diff = CMath.Min(hc & 0x3F, 64 - (lc & 0x3F));
// combine
ptr_temp = new GROUP_AFFINITY(
(UIntPtr)((Mask(lc) * lc_sel) | ((Mask(_diff) * hc_sel) << lc)),
ptr0_index++);
SetThreadGroupAffinity(handle, &ptr_temp, null);
// high position cores
g_idx = hc >> 6;
while (--g_idx >= 0)
{
ptr_temp = new GROUP_AFFINITY((UIntPtr)(ulong.MaxValue * hc_sel), ptr0_index++);
SetThreadGroupAffinity(handle, &ptr_temp, null);
}
// 상위에 남은 공간이 존재
if ((hc & 0x3F) - _diff > 0)
{
ptr_temp = new GROUP_AFFINITY(
(UIntPtr)(Mask(_diff) * hc_sel),
ptr0_index);
SetThreadGroupAffinity(handle, &ptr_temp, null);
}
// NOTE: a[i] = i; 연산에서 a[i]가 우선됨
// 'load ptr, load idx, load value, set value' 순서
}