setting up game core

in db and associated initialization code

blockiverse/blockiverse.cbp

@@ -139,6 +139,8 @@
 		<Unit filename="Account.cpp" />
 		<Unit filename="Account.hpp" />
 		<Unit filename="auto/version.h" />
+		<Unit filename="bvgame/core.cpp" />
+		<Unit filename="bvgame/core.hpp" />
 		<Unit filename="client.cpp">
 			<Option target="ClientDebug" />
 			<Option target="ClientRelease" />

blockiverse/bvgame/core.cpp

@@ -0,0 +1,78 @@
+/*
+**
+**  Minetest-Blockiverse
+**
+**  Incorporates portions of code from minetest 0.4.10-dev
+**
+**  Blockiverse
+**  Copyright (C) 2014 Brian Jack <gau_veldt@hotmail.com>
+**  Distributed as free software using the copyleft
+**  LGPL Version 3 license:
+**  https://www.gnu.org/licenses/lgpl-3.0.en.html
+**  See file LICENSE in ../
+**
+**  Blockiverse Game Implementation file core.cpp
+**
+**  Basic core blockiverse game and database initializers.
+**
+*/
+
+#include "../common.hpp"
+#include "core.hpp"
+
+namespace bvgame {
+
+    const char* queryHasModule="SELECT moduleId FROM Modules WHERE name=?1";
+    const char* queryAddModule="INSERT INTO Modules (name,description) VALUES (?1,?2)";
+
+
+    namespace core {
+
+        string coreModule="core";
+        string coreDesc="Main internal Blockiverse game module.";
+
+        void init(SQLiteDB &db) {
+            statement stmtHasModule;
+            statement stmtAddModule;
+            bool try_again;
+            s64 coreId=-1;
+
+            {
+                reread_HasCore:
+                stmtHasModule=db.prepare(queryHasModule);
+                db.bind(stmtHasModule,1,coreModule);
+                query_result rsltHasCore;
+                do {
+                    try_again=false;
+                    try {
+                        rsltHasCore=db.run(stmtHasModule);
+                    } catch (DBIsBusy &busy) {
+                        try_again=true;
+                    }
+                } while (try_again);
+                if (rsltHasCore->size()>0) {
+                    coreId=db.get_result<s64>(rsltHasCore,0,0);
+                } else {
+                    stmtAddModule=db.prepare(queryAddModule);
+                    db.bind(stmtAddModule,1,coreModule);
+                    db.bind(stmtAddModule,2,coreDesc);
+                    query_result rsltAddCore;
+                    do {
+                        try_again=false;
+                        try {
+                            rsltAddCore=db.run(stmtAddModule);
+                        } catch (DBIsBusy &busy) {
+                            try_again=true;
+                        }
+                    } while (try_again);
+                    goto reread_HasCore;
+                }
+            }
+            LOCK_COUT
+            cout << "[bvgame] core: module id is " << coreId << endl;
+            UNLOCK_COUT
+        }
+
+    }
+
+}

blockiverse/bvgame/core.hpp

@@ -0,0 +1,40 @@
+/*
+**
+**  Minetest-Blockiverse
+**
+**  Incorporates portions of code from minetest 0.4.10-dev
+**
+**  Blockiverse
+**  Copyright (C) 2014 Brian Jack <gau_veldt@hotmail.com>
+**  Distributed as free software using the copyleft
+**  LGPL Version 3 license:
+**  https://www.gnu.org/licenses/lgpl-3.0.en.html
+**  See file LICENSE in ../
+**
+**  Declaration (header) file {Thing}.hpp
+**
+**  {WhatThingDoes}
+**
+*/
+#ifndef BVGAME_CORE_HPP_INCLUDED
+#define BVGAME_CORE_HPP_INCLUDED
+
+#include "../database.hpp"
+
+namespace bvgame {
+
+    using bvdb::SQLiteDB;
+    using bvdb::DBIsBusy;
+    using bvdb::DBError;
+    typedef SQLiteDB::statement statement;
+    typedef SQLiteDB::query_result query_result;
+
+    namespace core {
+
+        void init(SQLiteDB &db);
+
+    }
+
+}
+
+#endif // BVGAME_CORE_HPP_INCLUDED

blockiverse/server.cpp

@@ -29,6 +29,7 @@
 #include "queries.hpp"
 #include <boost/thread.hpp>
 #include <boost/filesystem.hpp>
+#include "bvgame/core.hpp"
 
 #include "Account.hpp"
 
@@ -128,6 +129,15 @@ DWORD WINAPI server_main(LPVOID argvoid) {
                   << "     " << e.what()       << endl;
         UNLOCK_COUT
     }
+    try {
+        SQLiteDB db;    // RAII
+        bvgame::core::init(db);
+    } catch (DBError &e) {
+        LOCK_COUT
+        cout << "[DB] Error creating game:" << endl
+                  << "     " << e.what()       << endl;
+        UNLOCK_COUT
+    }
 
     io_service acceptor_io;
     int port=v2int(server_config["port"]);