pub struct SingleInstance { /* private fields */ }Expand description
A guard that enforces single-instance behavior for an application.
When acquired successfully, this struct holds a platform-specific lock that prevents other instances from starting. The lock is released when this struct is dropped.
Implementations§
Source§impl SingleInstance
impl SingleInstance
Sourcepub fn acquire(app_id: &str) -> Result<Self, AlreadyRunning>
pub fn acquire(app_id: &str) -> Result<Self, AlreadyRunning>
Attempt to acquire the single-instance lock for the given application ID.
Returns Ok(SingleInstance) if this is the first instance, or
Err(AlreadyRunning) if another instance already holds the lock.
Sourcepub fn on_activate(&self, callback: Box<dyn Fn() + Send + 'static>)
pub fn on_activate(&self, callback: Box<dyn Fn() + Send + 'static>)
Register a callback to be invoked when another instance attempts to start and sends an activation message.
On Unix platforms, this spawns a background thread that listens for incoming connections on the Unix domain socket.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for SingleInstance
impl RefUnwindSafe for SingleInstance
impl Send for SingleInstance
impl Sync for SingleInstance
impl Unpin for SingleInstance
impl UnsafeUnpin for SingleInstance
impl UnwindSafe for SingleInstance
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T: ?Sized,
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