48     size_t copy = mSize - writePos;  in write()  local
50     if (copy > size) {  in write()
51         copy = size;  in write()
54     memcpy(&mData[writePos], ev, copy * sizeof(sensors_event_t));  in write()
56     if (size > copy) {  in write()
57         memcpy(mData, &ev[copy], (size - copy) * sizeof(sensors_event_t));  in write()
87     size_t copy = mSize - readPos;  in read()  local
89     if (copy > size) {  in read()
90         copy = size;  in read()
93     memcpy(ev, &mData[readPos], copy * sizeof(sensors_event_t));  in read()
95     if (size > copy) {  in read()
96         memcpy(&ev[copy], mData, (size - copy) * sizeof(sensors_event_t));  in read()