import os

LOCK_DIR = "/var/lib/otbcloud/locks"

def _lock_path(name):
    return os.path.join(LOCK_DIR, f"{name}.lock")

def is_locked(name):
    return os.path.exists(_lock_path(name))

def acquire(name):
    os.makedirs(LOCK_DIR, exist_ok=True)
    path = _lock_path(name)
    if os.path.exists(path):
        return False
    with open(path, "w") as f:
        f.write(str(os.getpid()))
    return True

def release(name):
    path = _lock_path(name)
    if os.path.exists(path):
        os.remove(path)

def select_processor():
    if acquire("intel"):
        return "intel"
    if acquire("amd"):
        return "amd"
    return "cpu"