saa 3.3.0

Low-level synchronization primitives providing both asynchronous and synchronous interfaces.
Documentation 
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//! Primitive synchronization operation types.

/// Operation types.
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
pub(crate) enum Opcode {
    /// Acquires exclusive ownership.
    Exclusive,
    /// Acquires shared ownership.
    Shared,
    /// Acquires semaphores.
    Semaphore(u8),
    /// Waits for a condition without trying to acquire resources.
    Wait,
}