Trait GuardedTarget

Source

pub trait GuardedTarget {
    type Target;
}

Expand description

Provides a single dereferencing target type for the ReadApi, WriteApi and RwApi traits.

§Example

use read_write_api::{
    DowngradableWriteApi,
    GuardedTarget,
    ReadApi,
    RwApi,
    UpgradableReadApi,
    WriteApi
};

struct A(u64);

impl GuardedTarget for A {
    type Target = u64;
}

impl ReadApi for A
{
    type ReadGuard<'a>  = &'a u64
        where Self: 'a;

    fn read(&self) -> Self::ReadGuard<'_> {
        &self.0
    }
}

impl WriteApi for A
{
    type WriteGuard<'a> = &'a mut u64
        where Self: 'a;

    fn write(&mut self) -> Self::WriteGuard<'_> {
        &mut self.0
    }
}

impl UpgradableReadApi for A
{
    type UpgradableReadGuard<'a> = &'a mut u64
        where Self: 'a;

    fn upgradable_read(&mut self) -> Self::UpgradableReadGuard<'_> {
        &mut self.0
    }
}

impl DowngradableWriteApi for A
{
    type DowngradableWriteGuard<'a> = &'a mut u64
        where Self: 'a;

    fn downgradable_write(&mut self) -> Self::DowngradableWriteGuard<'_> {
        &mut self.0
    }
}

fn accept_read_write(_: impl RwApi<Target=u64>) {}

accept_read_write(A(1))