ngx_delete_pidfile  326 core/ngx_cycle.c             ngx_delete_pidfile(old_cycle);
ngx_delete_pidfile  121 core/ngx_cycle.h void ngx_delete_pidfile(ngx_cycle_t *cycle);
ngx_delete_pidfile  683 os/unix/ngx_process_cycle.c     ngx_delete_pidfile(cycle);