usedp 122 opal/mca/event/libevent2022/libevent/test/regress_buffer.c evbuffer_get_waste(struct evbuffer *buf, size_t *allocatedp, size_t *wastedp, size_t *usedp) usedp 162 opal/mca/event/libevent2022/libevent/test/regress_buffer.c *usedp = u;