刚查到，在安卓代码库里面有个例子Thermal.cpp

using ::android::hardware::interfacesEqual;

// std::vector<CallbackSetting> callbacks_;
if (std::any_of(callbacks_.begin(), callbacks_.end(), [&](const CallbackSetting &c) {
            return interfacesEqual(c.callback, callback);
        })) {
        status.code = ThermalStatusCode::FAILURE;
        status.debugMessage = "Same callback registered already";
        LOG(ERROR) << status.debugMessage;
    } else {
        callbacks_.emplace_back(callback, filterType, type);
        LOG(INFO) << "a callback has been registered to ThermalHAL, isFilter: " << filterType
                  << " Type: " << android::hardware::thermal::V2_0::toString(type);
    }

不是std::set,也许他们也不知道怎么比较大小？不多的话，一个一个比较是不是相等也行吧

【 在 allegro 的大作中提到: 】
: 你用什么判断两个callback相等？
--
FROM 72.199.121.*