Struct fil_types::build_version::RUNNING_NODE_TYPE [−][src]
pub struct RUNNING_NODE_TYPE { /* fields omitted */ }
Methods from Deref<Target = RwLock<NodeType>>
pub fn try_read(&self) -> Option<RwLockReadGuard<'_, T>>
Attempts to acquire a read lock.
If a read lock could not be acquired at this time, then None
is returned. Otherwise, a
guard is returned that releases the lock when dropped.
Examples
use async_lock::RwLock; let lock = RwLock::new(1); let reader = lock.read().await; assert_eq!(*reader, 1); assert!(lock.try_read().is_some());
pub async fn read(&'_ self) -> RwLockReadGuard<'_, T>
Acquires a read lock.
Returns a guard that releases the lock when dropped.
Note that attempts to acquire a read lock will block if there are also concurrent attempts to acquire a write lock.
Examples
use async_lock::RwLock; let lock = RwLock::new(1); let reader = lock.read().await; assert_eq!(*reader, 1); assert!(lock.try_read().is_some());
pub fn try_upgradable_read(&self) -> Option<RwLockUpgradableReadGuard<'_, T>>
Attempts to acquire a read lock with the possiblity to upgrade to a write lock.
If a read lock could not be acquired at this time, then None
is returned. Otherwise, a
guard is returned that releases the lock when dropped.
Upgradable read lock reserves the right to be upgraded to a write lock, which means there can be at most one upgradable read lock at a time.
Examples
use async_lock::{RwLock, RwLockUpgradableReadGuard}; let lock = RwLock::new(1); let reader = lock.upgradable_read().await; assert_eq!(*reader, 1); assert_eq!(*lock.try_read().unwrap(), 1); let mut writer = RwLockUpgradableReadGuard::upgrade(reader).await; *writer = 2;
pub async fn upgradable_read(&'_ self) -> RwLockUpgradableReadGuard<'_, T>
Attempts to acquire a read lock with the possiblity to upgrade to a write lock.
Returns a guard that releases the lock when dropped.
Upgradable read lock reserves the right to be upgraded to a write lock, which means there can be at most one upgradable read lock at a time.
Note that attempts to acquire an upgradable read lock will block if there are concurrent attempts to acquire another upgradable read lock or a write lock.
Examples
use async_lock::{RwLock, RwLockUpgradableReadGuard}; let lock = RwLock::new(1); let reader = lock.upgradable_read().await; assert_eq!(*reader, 1); assert_eq!(*lock.try_read().unwrap(), 1); let mut writer = RwLockUpgradableReadGuard::upgrade(reader).await; *writer = 2;
pub fn try_write(&self) -> Option<RwLockWriteGuard<'_, T>>
Attempts to acquire a write lock.
If a write lock could not be acquired at this time, then None
is returned. Otherwise, a
guard is returned that releases the lock when dropped.
Examples
use async_lock::RwLock; let lock = RwLock::new(1); assert!(lock.try_write().is_some()); let reader = lock.read().await; assert!(lock.try_write().is_none());
pub async fn write(&'_ self) -> RwLockWriteGuard<'_, T>
Acquires a write lock.
Returns a guard that releases the lock when dropped.
Examples
use async_lock::RwLock; let lock = RwLock::new(1); let writer = lock.write().await; assert!(lock.try_read().is_none());
Trait Implementations
impl Deref for RUNNING_NODE_TYPE
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type Target = RwLock<NodeType>
The resulting type after dereferencing.
fn deref(&self) -> &RwLock<NodeType>
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impl LazyStatic for RUNNING_NODE_TYPE
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fn initialize(lazy: &Self)
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Auto Trait Implementations
impl RefUnwindSafe for RUNNING_NODE_TYPE
impl Send for RUNNING_NODE_TYPE
impl Sync for RUNNING_NODE_TYPE
impl Unpin for RUNNING_NODE_TYPE
impl UnwindSafe for RUNNING_NODE_TYPE
Blanket Implementations
impl<T> Any for T where
T: 'static + ?Sized,
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T: 'static + ?Sized,
impl<T> Borrow<T> for T where
T: ?Sized,
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T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
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T: ?Sized,
pub fn borrow_mut(&mut self) -> &mut T
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impl<T> From<T> for T
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impl<T, U> Into<U> for T where
U: From<T>,
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U: From<T>,
impl<T> Same<T> for T
type Output = T
Should always be Self
impl<T, U> TryFrom<U> for T where
U: Into<T>,
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U: Into<T>,
type Error = Infallible
The type returned in the event of a conversion error.
pub fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>
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impl<T, U> TryInto<U> for T where
U: TryFrom<T>,
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U: TryFrom<T>,