88 lines
2.5 KiB
C#
88 lines
2.5 KiB
C#
using System;
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using System.IO;
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using System.Runtime.InteropServices;
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namespace BizHawk.Common
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{
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/// <summary>
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/// Starts a thread which cleans any filenames in %temp% beginning with bizhawk.bizdelete.
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/// Files shouldn't be named that unless they're safe to delete, but notably, they may stil be in use. That won't hurt this component.
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/// When they're no longer in use, this component will then be able to delete them.
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/// </summary>
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public static class TempFileCleaner
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{
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//todo - manage paths other than %temp%, make not static, or allow adding multiple paths to static instance
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public static string GetTempFilename(string friendlyname, string extension = null, bool delete = true)
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{
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string guidPart = Guid.NewGuid().ToString();
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var fname = string.Format("biz-{0}-{1}-{2}{3}", System.Diagnostics.Process.GetCurrentProcess().Id, friendlyname, guidPart, extension ?? "");
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if (delete) fname = RenameTempFilenameForDelete(fname);
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return Path.Combine(Path.GetTempPath(), fname);
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}
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public static string RenameTempFilenameForDelete(string path)
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{
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string filename = Path.GetFileName(path);
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string dir = Path.GetDirectoryName(path);
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if (!filename.StartsWith("biz-")) throw new InvalidOperationException();
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filename = "bizdelete-" + filename.Remove(0, 4);
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return Path.Combine(dir, filename);
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}
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public static void Start()
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{
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lock (typeof(TempFileCleaner))
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{
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if (thread != null)
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return;
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thread = new System.Threading.Thread(ThreadProc);
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thread.IsBackground = true;
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thread.Priority = System.Threading.ThreadPriority.Lowest;
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thread.Start();
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}
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}
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#if WINDOWS
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[DllImport("kernel32.dll", EntryPoint = "DeleteFileW", SetLastError = true, CharSet = CharSet.Unicode, ExactSpelling = true)]
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static extern bool DeleteFileW([MarshalAs(UnmanagedType.LPWStr)]string lpFileName);
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#endif
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static void ThreadProc()
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{
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var di = new DirectoryInfo(Path.GetTempPath());
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for (;;)
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{
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var fis = di.GetFiles("bizdelete-*");
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foreach (var fi in fis)
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{
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try
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{
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//SHUT. UP. THE. EXCEPTIONS.
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#if WINDOWS
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DeleteFileW(fi.FullName);
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#else
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fi.Delete();
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#endif
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}
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catch
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{
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}
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//try not to do more than one thing per frame
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System.Threading.Thread.Sleep(100);
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}
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//try not to slam the filesystem too hard, we dont want this to cause any hiccups
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System.Threading.Thread.Sleep(5000);
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}
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}
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public static void Stop()
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{
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}
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static System.Threading.Thread thread;
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}
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} |