from pathlib import Path
import time

LOCK_DIR = Path("/var/run/tg-bot")
LOCK_DIR.mkdir(exist_ok=True)

def acquire(name: str) -> bool:
    path = LOCK_DIR / f"{name}.lock"
    if path.exists():
        return False
    path.write_text(str(time.time()))
    return True

def release(name: str):
    path = LOCK_DIR / f"{name}.lock"
    if path.exists():
        path.unlink()