1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
using Microsoft.Win32.SafeHandles;
using System.Threading.Tasks;
using System.Diagnostics;
using System.Threading;
namespace System.IO
{
public partial class FileStream : Stream
{
public override IAsyncResult BeginRead(byte[] array, int offset, int numBytes, AsyncCallback callback, object state)
{
if (array == null)
throw new ArgumentNullException(nameof(array));
if (offset < 0)
throw new ArgumentOutOfRangeException(nameof(offset), SR.ArgumentOutOfRange_NeedNonNegNum);
if (numBytes < 0)
throw new ArgumentOutOfRangeException(nameof(numBytes), SR.ArgumentOutOfRange_NeedNonNegNum);
if (array.Length - offset < numBytes)
throw new ArgumentException(SR.Argument_InvalidOffLen);
if (IsClosed) throw new ObjectDisposedException(SR.ObjectDisposed_FileClosed);
if (!CanRead) throw new NotSupportedException(SR.NotSupported_UnreadableStream);
if (!IsAsync)
return base.BeginRead(array, offset, numBytes, callback, state);
else
return TaskToApm.Begin(ReadAsyncInternal(array, offset, numBytes, CancellationToken.None), callback, state);
}
public override IAsyncResult BeginWrite(byte[] array, int offset, int numBytes, AsyncCallback callback, object state)
{
if (array == null)
throw new ArgumentNullException(nameof(array));
if (offset < 0)
throw new ArgumentOutOfRangeException(nameof(offset), SR.ArgumentOutOfRange_NeedNonNegNum);
if (numBytes < 0)
throw new ArgumentOutOfRangeException(nameof(numBytes), SR.ArgumentOutOfRange_NeedNonNegNum);
if (array.Length - offset < numBytes)
throw new ArgumentException(SR.Argument_InvalidOffLen);
if (IsClosed) throw new ObjectDisposedException(SR.ObjectDisposed_FileClosed);
if (!CanWrite) throw new NotSupportedException(SR.NotSupported_UnwritableStream);
if (!IsAsync)
return base.BeginWrite(array, offset, numBytes, callback, state);
else
return TaskToApm.Begin(WriteAsyncInternal(array, offset, numBytes, CancellationToken.None), callback, state);
}
public override int EndRead(IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException(nameof(asyncResult));
if (!IsAsync)
return base.EndRead(asyncResult);
else
return TaskToApm.End<int>(asyncResult);
}
public override void EndWrite(IAsyncResult asyncResult)
{
if (asyncResult == null)
throw new ArgumentNullException(nameof(asyncResult));
if (!IsAsync)
base.EndWrite(asyncResult);
else
TaskToApm.End(asyncResult);
}
}
}
|
