Mono.Posix/Mono.Posix/Mono.Unix/FileHandleOperations.cs
2019-11-26 18:15:10 +01:00

80 lines
3.0 KiB
C#

//
// Mono.Unix/FileHandleOperations.cs
//
// Authors:
// Jonathan Pryor (jonpryor@vt.edu)
//
// (C) 2005 Jonathan Pryor
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.Text;
using Mono.Unix;
namespace Mono.Unix {
public sealed /* static */ class FileHandleOperations
{
private FileHandleOperations () {}
public static void AdviseFileAccessPattern (Int32 fd, FileAccessPattern pattern, Int64 offset, Int64 len)
{
Int32 r = Native.Syscall.posix_fadvise (fd, offset, len,
(Native.PosixFadviseAdvice) pattern);
UnixMarshal.ThrowExceptionForLastErrorIf (r);
}
public static void AdviseFileAccessPattern(Int32 fd, FileAccessPattern pattern) => AdviseFileAccessPattern(fd, pattern, 0, 0);
[SuppressMessage("Microsoft.Design", "CS0618", Justification = "Someone do shit")]
public static void AdviseFileAccessPattern (FileStream file, FileAccessPattern pattern, Int64 offset, Int64 len)
{
if (file == null) {
throw new ArgumentNullException ("file");
}
Int32 r = Native.Syscall.posix_fadvise (file.Handle.ToInt32(), offset, len,
(Native.PosixFadviseAdvice) pattern);
UnixMarshal.ThrowExceptionForLastErrorIf (r);
}
public static void AdviseFileAccessPattern(FileStream file, FileAccessPattern pattern) => AdviseFileAccessPattern(file, pattern, 0, 0);
public static void AdviseFileAccessPattern (UnixStream stream, FileAccessPattern pattern, Int64 offset, Int64 len)
{
if (stream == null) {
throw new ArgumentNullException ("stream");
}
Int32 r = Native.Syscall.posix_fadvise (stream.Handle, offset, len,
(Native.PosixFadviseAdvice) pattern);
UnixMarshal.ThrowExceptionForLastErrorIf (r);
}
public static void AdviseFileAccessPattern(UnixStream stream, FileAccessPattern pattern) => AdviseFileAccessPattern(stream, pattern, 0, 0);
}
}
// vim: noexpandtab