ngx_add_channel_event 28 os/unix/ngx_channel.h ngx_int_t ngx_add_channel_event(ngx_cycle_t *cycle, ngx_fd_t fd, ngx_add_channel_event 998 os/unix/ngx_process_cycle.c if (ngx_add_channel_event(cycle, ngx_channel, NGX_READ_EVENT,