in ktor-io/jvm/src/io/ktor/utils/io/internal/RingBufferCapacity.kt [123:130]
fun tryLockForRelease(): Boolean {
val AvailableForWrite = AvailableForWrite
while (true) {
val remaining = availableForWrite
if (pendingToFlush > 0 || availableForRead > 0 || remaining != totalCapacity) return false
if (AvailableForWrite.compareAndSet(this, remaining, 0)) return true
}
}