Method sub_channel_controller

src/brpc/parallel_channel.cpp:418–429

Different from sub_done(), sub_channel_controller returns NULL for invalid accesses and never crashes.

    // Different from sub_done(), sub_channel_controller returns NULL for
    // invalid accesses and never crashes.
    const Controller* sub_channel_controller(int i) const {
        if (i >= 0 && i < _nchan) {
            if (_nchan == _ndone) {
                return &sub_done(i)->cntl;
            }
            const int offset = sub_done_map(i);
            if (offset >= 0) {
                return &sub_done(offset)->cntl;
            }
        }
        return NULL;
    }

private:
    int _fail_limit;