LambdaAsyncUpdater Class Reference

Async updater that calls a std::function callback instead of requiring virtual override. More...

#include <gin_asyncutilities.h>

Inherits juce::AsyncUpdater.

Public Member Functions
	LambdaAsyncUpdater (std::function< void()> func)

Public Attributes
std::function< void()>	onAsyncUpdate

Detailed Description

Async updater that calls a std::function callback instead of requiring virtual override.

LambdaAsyncUpdater provides a more convenient alternative to juce::AsyncUpdater by accepting a lambda or std::function for the async callback. This is useful for safely triggering message-thread operations from other threads without creating a full subclass.

Key Features:

• Accepts lambda functions or std::function callbacks
• Thread-safe asynchronous message posting
• Coalesces multiple trigger calls
• No need to create subclass for simple async operations
• Callback can be set at construction

The onAsyncUpdate function is called on the message thread when triggerAsyncUpdate() is called from any thread. Multiple calls are coalesced into a single callback.

Thread Safety:

• triggerAsyncUpdate() is thread-safe
• onAsyncUpdate callback runs on message thread only
• Safe for cross-thread communication

Usage:

// Create with lambda (runs on message thread)
LambdaAsyncUpdater updater([this]() {
    // This runs on the message thread
    updateUI();
    repaint();
});
 
// Trigger from audio thread or background thread
void audioThreadCallback() {
    // Process audio...
    updater.triggerAsyncUpdate(); // Safely posts to message thread
}
 
// Multiple triggers coalesce into one callback
updater.triggerAsyncUpdate();
updater.triggerAsyncUpdate(); // Only one callback will occur

See also

juce::AsyncUpdater, LambdaTimer, callOnMainThreadBlocking

Constructor & Destructor Documentation

LambdaAsyncUpdater()

LambdaAsyncUpdater::LambdaAsyncUpdater

(

std::function< void()>

func

)

Member Data Documentation

onAsyncUpdate

std::function<void()> LambdaAsyncUpdater::onAsyncUpdate

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The documentation for this class was generated from the following file:

• gin_asyncutilities.h