What mechanisms are used for control transfer between coroutines in asynchronous programming?

In asynchronous programming on Android using coroutines, control is transferred between them using the mechanism of suspension points. Coroutines can suspend their execution at certain points (for example, when calling delay(), withContext(), or waiting for the result of an asynchronous operation), freeing the thread for other tasks.

Main control transfer mechanisms:

• Suspending functions — functions that can suspend the execution of a coroutine without blocking the thread.
• Dispatcher — determines on which thread or thread pool the coroutine will run.
• Continuation — an object that saves the state of the coroutine and allows resuming its execution.

Example:

suspend fun fetchData() {
    val data = withContext(Dispatchers.IO) {
        // Perform a long operation in the background thread
        loadFromNetwork()
    }
    // Return to the main thread to update the UI
    updateUI(data)
}

Here, control transitions between coroutines and threads through suspension points and dispatchers.