use_accept4        30 event/ngx_event_accept.c     static ngx_uint_t  use_accept4 = 1;
use_accept4        53 event/ngx_event_accept.c         if (use_accept4) {
use_accept4        76 event/ngx_event_accept.c                           use_accept4 ? "accept4() failed" : "accept() failed");
use_accept4        78 event/ngx_event_accept.c             if (use_accept4 && err == NGX_ENOSYS) {
use_accept4        79 event/ngx_event_accept.c                 use_accept4 = 0;