network_gamelist.cpp

Go to the documentation of this file.
00001 /* $Id: network_gamelist.cpp 15299 2009-01-31 20:16:06Z smatz $ */
00002 
00008 #ifdef ENABLE_NETWORK
00009 
00010 #include "../stdafx.h"
00011 #include "../debug.h"
00012 #include "../core/alloc_func.hpp"
00013 #include "../thread.h"
00014 #include "../string_func.h"
00015 #include "network_internal.h"
00016 #include "network_udp.h"
00017 #include "network_gamelist.h"
00018 
00019 NetworkGameList *_network_game_list = NULL;
00020 
00021 ThreadMutex *_network_game_list_mutex = ThreadMutex::New();
00022 NetworkGameList *_network_game_delayed_insertion_list = NULL;
00023 
00028 void NetworkGameListAddItemDelayed(NetworkGameList *item)
00029 {
00030   _network_game_list_mutex->BeginCritical();
00031   item->next = _network_game_delayed_insertion_list;
00032   _network_game_delayed_insertion_list = item;
00033   _network_game_list_mutex->EndCritical();
00034 }
00035 
00037 static void NetworkGameListHandleDelayedInsert()
00038 {
00039   _network_game_list_mutex->BeginCritical();
00040   while (_network_game_delayed_insertion_list != NULL) {
00041     NetworkGameList *ins_item = _network_game_delayed_insertion_list;
00042     _network_game_delayed_insertion_list = ins_item->next;
00043 
00044     NetworkGameList *item = NetworkGameListAddItem(ins_item->ip, ins_item->port);
00045 
00046     if (item != NULL) {
00047       if (StrEmpty(item->info.server_name)) {
00048         memset(&item->info, 0, sizeof(item->info));
00049         strecpy(item->info.server_name, ins_item->info.server_name, lastof(item->info.server_name));
00050         strecpy(item->info.hostname, ins_item->info.hostname, lastof(item->info.hostname));
00051         item->online = false;
00052       }
00053       item->manually = ins_item->manually;
00054       UpdateNetworkGameWindow(false);
00055     }
00056     free(ins_item);
00057   }
00058   _network_game_list_mutex->EndCritical();
00059 }
00060 
00066 NetworkGameList *NetworkGameListAddItem(uint32 ip, uint16 port)
00067 {
00068   if (ip == 0) return NULL;
00069 
00070   NetworkGameList *item, *prev_item;
00071 
00072   prev_item = NULL;
00073   for (item = _network_game_list; item != NULL; item = item->next) {
00074     if (item->ip == ip && item->port == port) return item;
00075     prev_item = item;
00076   }
00077 
00078   item = CallocT<NetworkGameList>(1);
00079   item->next = NULL;
00080   item->ip = ip;
00081   item->port = port;
00082 
00083   if (prev_item == NULL) {
00084     _network_game_list = item;
00085   } else {
00086     prev_item->next = item;
00087   }
00088   DEBUG(net, 4, "[gamelist] added server to list");
00089 
00090   UpdateNetworkGameWindow(false);
00091 
00092   return item;
00093 }
00094 
00097 void NetworkGameListRemoveItem(NetworkGameList *remove)
00098 {
00099   NetworkGameList *item, *prev_item;
00100 
00101   prev_item = NULL;
00102   for (item = _network_game_list; item != NULL; item = item->next) {
00103     if (remove == item) {
00104       if (prev_item == NULL) {
00105         _network_game_list = remove->next;
00106       } else {
00107         prev_item->next = remove->next;
00108       }
00109 
00110       /* Remove GRFConfig information */
00111       ClearGRFConfigList(&remove->info.grfconfig);
00112       free(remove);
00113       remove = NULL;
00114 
00115       DEBUG(net, 4, "[gamelist] removed server from list");
00116       UpdateNetworkGameWindow(false);
00117       return;
00118     }
00119     prev_item = item;
00120   }
00121 }
00122 
00123 enum {
00124   MAX_GAME_LIST_REQUERY_COUNT  =  5, 
00125   REQUERY_EVERY_X_GAMELOOPS    = 60, 
00126   REFRESH_GAMEINFO_X_REQUERIES = 50, 
00127 };
00128 
00130 void NetworkGameListRequery()
00131 {
00132   NetworkGameListHandleDelayedInsert();
00133 
00134   static uint8 requery_cnt = 0;
00135 
00136   if (++requery_cnt < REQUERY_EVERY_X_GAMELOOPS) return;
00137   requery_cnt = 0;
00138 
00139   for (NetworkGameList *item = _network_game_list; item != NULL; item = item->next) {
00140     item->retries++;
00141     if (item->retries < REFRESH_GAMEINFO_X_REQUERIES && (item->online || item->retries >= MAX_GAME_LIST_REQUERY_COUNT)) continue;
00142 
00143     /* item gets mostly zeroed by NetworkUDPQueryServer */
00144     uint8 retries = item->retries;
00145     NetworkUDPQueryServer(NetworkAddress(item->ip, item->port));
00146     item->retries = (retries >= REFRESH_GAMEINFO_X_REQUERIES) ? 0 : retries;
00147   }
00148 }
00149 
00150 #endif /* ENABLE_NETWORK */

Generated on Wed Apr 1 14:38:07 2009 for OpenTTD by  doxygen 1.5.6