internal static bool TryUseExisting <T>(this IComputed <T>?existing, ComputeContext context, IComputed?usedBy)
{
var callOptions = context.CallOptions;
var useExisting = (callOptions & CallOptions.TryGetExisting) != 0;
if (existing == null)
{
return(useExisting);
}
if (!(useExisting || existing.IsConsistent()))
{
return(false);
}
context.TryCapture(existing);
var invalidate = (callOptions & CallOptions.Invalidate) == CallOptions.Invalidate;
if (invalidate)
{
existing.Invalidate();
return(true);
}
if (!useExisting)
{
((IComputedImpl?)usedBy)?.AddUsed((IComputedImpl)existing !);
}
((IComputedImpl?)existing)?.RenewTimeouts();
return(true);
}
internal static bool TryUseExisting <T>(this IComputed <T>?existing, ComputeContext context, IComputed?usedBy)
{
var callOptions = context.CallOptions;
var useExisting = (callOptions & CallOptions.TryGetExisting) != 0;
if (existing == null)
{
return(useExisting);
}
useExisting |= existing.IsConsistent();
if (!useExisting)
{
return(false);
}
if ((callOptions & CallOptions.Capture) != 0)
{
Interlocked.Exchange(ref context.CapturedComputed, existing);
}
if ((callOptions & CallOptions.Invalidate) == CallOptions.Invalidate)
{
existing.Invalidate();
return(true);
}
((IComputedImpl?)usedBy)?.AddUsed((IComputedImpl)existing !);
((IComputedImpl?)existing)?.RenewTimeouts();
return(true);
}
internal static bool TryUseExistingFromUse <T>(this IComputed <T>?existing, ComputeContext context, IComputed?usedBy)
{
if (existing == null || !existing.IsConsistent())
{
return(false);
}
context.TryCapture(existing);
((IComputedImpl?)usedBy)?.AddUsed((IComputedImpl)existing !);
((IComputedImpl?)existing)?.RenewTimeouts();
return(true);
}