MongoDB  2.7.0
touch_pages.h
1 /* Copyright 2009 10gen Inc.
2  *
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #pragma once
17 
18 #include <cstdlib>
19 #include <fcntl.h>
20 
21 namespace mongo {
22 
23  // Touch a range of pages using an OS-specific method.
24  // Takes a file descriptor, offset, and length, for Linux use.
25  // Additionally takes an Extent pointer for use on other platforms.
26  void touch_pages( const char* buf, size_t length );
27 }