static internal void RestoreCurrentWI(ExecutionContext.Reader currentEC, ExecutionContext.Reader prevEC, WindowsIdentity targetWI, bool cachedAlwaysFlowImpersonationPolicy)
{
Contract.Assert(currentEC.IsSame(Thread.CurrentThread.GetExecutionContextReader()));
Contract.Assert(cachedAlwaysFlowImpersonationPolicy == _alwaysFlowImpersonationPolicy);
// NOTE: cachedAlwaysFlowImpersonationPolicy is a perf optimization to avoid always having to access a static variable here.
if (cachedAlwaysFlowImpersonationPolicy || prevEC.SecurityContext.WindowsIdentity != targetWI)
{
//
// Either we're always flowing, or the target WI was obtained from the current EC in the first place.
//
Contract.Assert(_alwaysFlowImpersonationPolicy || currentEC.SecurityContext.WindowsIdentity == targetWI);
RestoreCurrentWIInternal(targetWI);
}
}