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
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
//
// System.Web.QueueManager
//
// Authors:
// Gonzalo Paniagua Javier (gonzalo@ximian.com)
//
// (C) 2003,2004 Novell, Inc (http://www.novell.com)
//
//
// 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.Collections;
using System.Threading;
using System.Web.Configuration;
namespace System.Web
{
class QueueManager
{
int minFree;
int minLocalFree;
int queueLimit;
Queue queue;
bool disposing;
public QueueManager ()
{
HttpRuntimeConfig config;
config = (HttpRuntimeConfig) HttpContext.GetAppConfig ("system.web/httpRuntime");
minFree = config.MinFreeThreads;
minLocalFree = config.MinLocalRequestFreeThreads;
queueLimit = config.AppRequestQueueLimit;
queue = new Queue (queueLimit);
}
// TODO: handle local connections, just check for 127.0.0.1
bool CanExecuteRequest ()
{
if (disposing)
return false;
int threads, cports;
ThreadPool.GetAvailableThreads (out threads, out cports);
return (threads > minFree); // || (local && threads > minLocalFree);
}
public HttpWorkerRequest GetNextRequest (HttpWorkerRequest req)
{
if (!CanExecuteRequest ()) {
if (req != null) {
lock (queue) {
Queue (req);
}
}
return null;
}
HttpWorkerRequest result;
lock (queue) {
result = Dequeue ();
if (result != null) {
if (req != null)
Queue (req);
} else {
result = req;
}
}
return result;
}
void Queue (HttpWorkerRequest wr)
{
if (queue.Count < queueLimit) {
queue.Enqueue (wr);
return;
}
HttpRuntime.FinishUnavailable (wr);
}
HttpWorkerRequest Dequeue ()
{
if (queue.Count > 0)
return (HttpWorkerRequest) queue.Dequeue ();
return null;
}
public void Dispose ()
{
if (disposing)
return;
disposing = true;
HttpWorkerRequest wr;
while ((wr = GetNextRequest (null)) != null)
HttpRuntime.FinishUnavailable (wr);
queue = null;
}
}
}
|
