internal bool Read(FlagArray flags, ref int owner, out LockSlot <T> slot)
{
if (Read(ref owner, out slot))
{
return(true);
}
var resultLock = -1;
foreach (var flag in flags.Flags)
{
LockSlot <T> testSlot;
if (!_slots.TryGet(flag, out testSlot))
{
continue;
}
if (ReferenceEquals(slot, null) || slot.CompareTo(testSlot) < 0)
{
slot = testSlot;
resultLock = flag;
}
}
if (Interlocked.CompareExchange(ref owner, resultLock, -1) != -1)
{
return(Read(ref owner, out slot));
}
if (slot == null)
{
return(false);
}
return(true);
}
internal bool Read(FlagArray flags, ref int owner, out LockSlot <T> slot)
{
if (Read(ref owner, out slot))
{
return(true);
}
var resultLock = -1;
foreach (var flag in flags.Flags)
{
if (!_slots.TryGet(flag, out var testSlot))
{
continue;
}
if (slot?.CompareTo(testSlot) >= 0)
{
continue;
}
slot = testSlot;
resultLock = flag;
}
if (Interlocked.CompareExchange(ref owner, resultLock, -1) != -1)
{
return(Read(ref owner, out slot));
}
return(slot != null);
}
public bool Equals(LockSlot <T> other)
{
if (other == null)
{
return(false);
}
return(_versionToken.Equals(other._versionToken));
}
public int CompareTo(LockSlot <T> other)
{
if (ReferenceEquals(other, null))
{
return(1);
}
return(_versionToken.CompareTo(other._versionToken));
}
private bool TryClaimFreeSlot(out LockSlot <T> slot)
{
if (_closedSlots.TryTake(out slot))
{
slot.Open(_version.AdvanceNewToken());
return(true);
}
return(false);
}
internal bool ClaimSlot(out LockSlot <T> slot)
{
if (TryClaimFreeSlot(out slot))
{
return(true);
}
if (_slots.Count < _slots.Capacity)
{
var index = Interlocked.Increment(ref _index) & (Capacity - 1);
slot = _slots.Get(index);
return(true);
}
slot = null;
return(false);
}
private bool Read(ref int owner, out LockSlot <T> slot)
{
slot = null;
var got = owner;
if (got == -1)
{
return(false);
}
if (_slots.TryGet(got, out var found) && found.IsOpen)
{
slot = found;
return(true);
}
Interlocked.CompareExchange(ref owner, -1, got);
return(false);
}
internal void Uncapture(LockSlot <T> slot)
{
Interlocked.CompareExchange(ref _owner, -1, slot.Id);
_capture[slot.Id] = false;
}
internal void Capture(LockSlot <T> slot)
{
_capture[slot.Id] = true;
}
internal void Close(LockSlot <T> slot)
{
_closedSlots.TryAdd(slot);
}
public bool Equals(LockSlot <T> other)
{
return(!(other is null) && _versionToken.Equals(other._versionToken));
}
public int CompareTo(LockSlot <T> other)
{
return(other is null ? 1 : _versionToken.CompareTo(other._versionToken));
}