mongodb: nonce.h Source File

00001 // nonce.h
00002 
00003 /*    Copyright 2009 10gen Inc.
00004  *
00005  *    Licensed under the Apache License, Version 2.0 (the "License");
00006  *    you may not use this file except in compliance with the License.
00007  *    You may obtain a copy of the License at
00008  *
00009  *    http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  *    Unless required by applicable law or agreed to in writing, software
00012  *    distributed under the License is distributed on an "AS IS" BASIS,
00013  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  *    See the License for the specific language governing permissions and
00015  *    limitations under the License.
00016  */
00017 
00018 #pragma once
00019 
00020 namespace mongo {
00021 
00022     typedef unsigned long long nonce;
00023 
00024     struct Security {
00025         Security();
00026 
00027         nonce getNonce();
00028 
00030         nonce getNonceInitSafe() {
00031             init();
00032             return getNonce();
00033         }
00034     private:
00035         ifstream *_devrandom;
00036         static bool _initialized;
00037         void init(); // can call more than once
00038     };
00039 
00040     extern Security security;
00041 
00042 } // namespace mongo