src/server.c

   1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*- */
   2
   3 /*  Monkey HTTP Daemon
   4  *  ------------------
   5  *  Copyright (C) 2001-2008, Eduardo Silva P.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License as published by
   9  *  the Free Software Foundation; either version 2 of the License, or
  10  *  (at your option) any later version.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU Library General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21
  22 #include <stdio.h>
  23 #include <sys/socket.h>
  24 #include <netinet/in.h>
  25
  26 #include <sys/time.h>
  27 #include <sys/resource.h>
  28
  29 #include "monkey.h"
  30 #include "config.h"
  31 #include "scheduler.h"
  32 #include "epoll.h"
  33 #include "socket.h"
  34
  35 /* Return the number of clients that can be attended
  36  * at the same time per worker thread
  37  */
  38 int mk_server_worker_capacity(int nworkers)
  39 {
  40         int max, avl;
  41         struct rlimit lim;
  42
  43         /* Limit by system */
  44         getrlimit(RLIMIT_NOFILE, &lim);
  45         max = lim.rlim_cur;
  46
  47         /* Minimum of fds needed by Monkey:
  48          * --------------------------------
  49          * 3 fds: stdin, stdout, stderr
  50          * 1 fd for main socket server
  51          * 1 fd for epoll array (per thread)
  52          * 1 fd for worker logger when writing to FS
  53          * 2 fd for worker logger pipe
  54          */
  55
  56         avl = max - (3 + 1 + nworkers + 1 + 2);
  57         return (avl/nworkers);
  58 }
  59
  60 /* Here we launch the worker threads to attend clients */
  61 void mk_server_launch_workers()
  62 {
  63         int i;
  64
  65         config->worker_capacity = mk_server_worker_capacity(config->workers);
  66
  67         for(i=0; i<config->workers; i++)
  68         {
  69                 mk_sched_launch_thread(config->worker_capacity);
  70         }
  71 }
  72
  73 void mk_server_loop(int server_fd)
  74 {
  75         int remote_fd;
  76         struct sockaddr_in sockaddr;
  77         struct sched_list_node *sched = sched_list;
  78         socklen_t socket_size = sizeof(struct sockaddr_in);
  79
  80         while(1){
  81                 remote_fd = accept(server_fd, (struct sockaddr *)&sockaddr,
  82                                    &socket_size);
  83
  84                 if(remote_fd == -1){
  85                         continue;
  86                 }
  87
  88                 /* Assign socket to worker thread */
  89                 mk_sched_add_client(sched, remote_fd);
  90
  91                 if(sched->next){
  92                         sched = sched->next;
  93                 }
  94                 else{
  95                         sched = sched_list;
  96                 }
  97        }
  98 }