pub struct DbFormatChangeThreadHandle {
update_task: Option<Arc<JoinHandle<Result<(), CancelFormatChange>>>>,
cancel_handle: SyncSender<CancelFormatChange>,
}
Expand description
A handle to a spawned format change thread.
Cloning this struct creates an additional handle to the same thread.
§Concurrency
Cancelling the thread on drop has a race condition, because two handles can be dropped at the same time.
If cancelling the thread is required for correct operation or usability, the owner of the handle must call force_cancel().
Fields§
§update_task: Option<Arc<JoinHandle<Result<(), CancelFormatChange>>>>
A handle to the format change/check thread. If configured, this thread continues running so it can perform periodic format checks.
Panics from this thread are propagated into Zebra’s state service. The task returns an error if the upgrade was cancelled by a shutdown.
cancel_handle: SyncSender<CancelFormatChange>
A channel that tells the running format thread to finish early.
Implementations§
source§impl DbFormatChangeThreadHandle
impl DbFormatChangeThreadHandle
sourcepub fn cancel_if_needed(&self) -> bool
pub fn cancel_if_needed(&self) -> bool
Cancel the running format change thread, if this is the last handle. Returns true if it was actually cancelled.
sourcepub fn force_cancel(&self)
pub fn force_cancel(&self)
Force the running format change thread to cancel, even if there are other handles.
sourcepub fn check_for_panics(&mut self)
pub fn check_for_panics(&mut self)
Check for panics in the code running in the spawned thread. If the thread exited with a panic, resume that panic.
This method should be called regularly, so that panics are detected as soon as possible.
sourcepub fn wait_for_panics(&mut self)
pub fn wait_for_panics(&mut self)
Wait for the spawned thread to finish. If it exited with a panic, resume that panic.
Exits early if the thread has other outstanding handles.
This method should be called during shutdown.
Trait Implementations§
source§impl Clone for DbFormatChangeThreadHandle
impl Clone for DbFormatChangeThreadHandle
source§fn clone(&self) -> DbFormatChangeThreadHandle
fn clone(&self) -> DbFormatChangeThreadHandle
1.0.0 · source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
source
. Read moresource§impl Debug for DbFormatChangeThreadHandle
impl Debug for DbFormatChangeThreadHandle
Auto Trait Implementations§
impl Freeze for DbFormatChangeThreadHandle
impl !RefUnwindSafe for DbFormatChangeThreadHandle
impl Send for DbFormatChangeThreadHandle
impl Sync for DbFormatChangeThreadHandle
impl Unpin for DbFormatChangeThreadHandle
impl !UnwindSafe for DbFormatChangeThreadHandle
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