Union rustc_data_structures::sync::lock::maybe_sync::ModeUnion

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union ModeUnion {
    no_sync: ManuallyDrop<Cell<bool>>,
    sync: ManuallyDrop<RawMutex>,
}

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§no_sync: ManuallyDrop<Cell<bool>>

Indicates if the cell is locked. Only used if Lock.mode is NoSync.

§sync: ManuallyDrop<RawMutex>

A lock implementation that’s only used if Lock.mode is Sync.

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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 1 byte