Function af_get_default_random_engine

src/api/c/random.cpp:130–151

}  // namespace

af_err af_get_default_random_engine(af_random_engine *r) {
    try {
        AF_CHECK(af_init());

        // RandomEngine contains device buffers which are dependent on
        // context|stream/device. Since nor context or stream are available at
        // this level, we will only use the deviceId.
        thread_local std::map<int /*deviceId*/, RandomEngine *>
            cachedDefaultRandomEngines;
        const int dependent = af::getDevice();
        auto it             = cachedDefaultRandomEngines.find(dependent);
        if (it == cachedDefaultRandomEngines.end()) {
            RandomEngine *defaultRandomEngine     = new RandomEngine;
            cachedDefaultRandomEngines[dependent] = defaultRandomEngine;
            *r = static_cast<af_random_engine>(defaultRandomEngine);
        } else {
            *r = static_cast<af_random_engine>(it->second);
        }
        return AF_SUCCESS;
    }
    CATCHALL;
}

af_err af_create_random_engine(af_random_engine *engineHandle,
                               af_random_engine_type rtype, uintl seed) {