%% what a shared fence handle points at, inside one process.
flowchart LR
    F1["ID3D12Fence<br/>(created SHARED)"] --> E["FenceEvent<br/>refcount +<br/>MTLSharedEvent"]
    F2["ID3D12Fence<br/>(OpenSharedHandle)"] --> E
    S["pagefile section<br/>magic, process id,<br/>fence id, flags"]
    H1["app's handle"] --> S
    H2["DuplicateHandle copy"] --> S
    O["our own handle<br/>+ one reference"] --> S
    O --> E
    C{"HandleCount == 1?<br/>(NtQueryObject)"} -->|"yes: drop ours"| O
    E -->|"last reference:<br/>value = max, destroy"| X["GPU and CPU waits<br/>released"]