NGX_HAVE_EPOLL   1151 event/ngx_event.c #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
NGX_HAVE_EPOLL   1164 event/ngx_event.c #if (NGX_HAVE_EPOLL) && !(NGX_TEST_BUILD_EPOLL)
NGX_HAVE_EPOLL    402 event/ngx_event.h #elif (NGX_HAVE_EPOLL)
NGX_HAVE_EPOLL     79 os/unix/ngx_linux_config.h #if (NGX_HAVE_EPOLL)