86 lines
2.5 KiB
Plaintext
86 lines
2.5 KiB
Plaintext
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///////////////////////////////////////////////////////////////////////////////
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//
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// Microsoft Research Singularity
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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// Note: CachedFile is intended to hold copies of Custom.Ads
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// and User.Profiles in memory.
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//
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using System;
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using System.Collections;
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using System.Diagnostics;
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using Microsoft.SingSharp;
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using Microsoft.SingSharp.Runtime;
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using Microsoft.Singularity.Channels;
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using Microsoft.Singularity.Directory;
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using Microsoft.Singularity.WebApps;
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using Microsoft.Singularity.WebApps.Contracts;
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using System.Io;
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using System.Text;
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using System.Threading;
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using System.Web;
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using FileSystem.Utils;
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using System.Net.IP;
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using Microsoft.Singularity.V1.Services;
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namespace Microsoft.Singularity.WebApps
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{
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public class CachedFile
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{
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string filename;
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byte[] filedata;
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uint fileMaxBytes;
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internal CachedFile(string! theFilename, uint maxBytes)
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{
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this.filename = theFilename;
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this.fileMaxBytes = maxBytes;
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}
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public bool Refresh()
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{
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lock (this) {
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FileContract.Imp conn;
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conn = FileUtils.OpenFile(filename);
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if (conn == null) {
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Console.WriteLine("CachedFile: Failed to open {0}", filename);
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return false;
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}
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try {
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byte[]! in ExHeap bytes = new [ExHeap] byte [fileMaxBytes];
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long bytesRead;
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int error;
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conn.SendRead(bytes,
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/* buffer offset */0,
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/* file offset */0,
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bytes.Length);
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conn.RecvAckRead(out bytes, out bytesRead, out error);
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if (error != 0) {
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delete bytes;
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return false;
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}
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filedata = Bitter.ToByteArray(bytes);
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delete bytes;
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return true;
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}
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finally {
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delete conn;
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}
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}
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}
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// Caller should not hold onto this outside of method of use.
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// "borrows"
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public byte[] FileData
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{
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get { lock (this) { return filedata; } }
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}
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}
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}
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