vllm.utils.counter ¶

class AtomicCounter:
    """An atomic, thread-safe counter."""

    def __init__(self, initial: int = 0) -> None:
        """Initialize a new atomic counter to given initial value."""
        super().__init__()

        self._value = initial
        self._lock = threading.Lock()

    @property
    def value(self) -> int:
        return self._value

    def inc(self, num: int = 1) -> int:
        """Atomically increment the counter by num and return the new value."""
        with self._lock:
            self._value += num
            return self._value

    def dec(self, num: int = 1) -> int:
        """Atomically decrement the counter by num and return the new value."""
        with self._lock:
            self._value -= num
            return self._value