Is it possible to use the synchronized keyword to synchronize coroutines in Kotlin?

The synchronized keyword in Kotlin is intended for thread synchronization at the JVM level and is not used for coroutines. Coroutines operate within cooperative multitasking and do not block threads directly.

For coroutine synchronization, special mechanisms from the kotlinx.coroutines library are used, such as:

• Mutex — for mutual exclusion when accessing shared resources.
• Channels — for data exchange between coroutines.
• Atomic operations from the kotlinx.atomicfu package.

Example of using Mutex for coroutine synchronization:

val mutex = Mutex()
var counter = 0

suspend fun safeIncrement() {
    mutex.withLock {
        counter++
    }
}

Thus, synchronized is not suitable for coroutines, and specialized tools from kotlinx.coroutines should be used.