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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
|
using System;
using System.IO;
using System.IO.Compression;
using System.Threading;
using System.Collections.Generic;
using System.Linq;
namespace TestThreads
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Attempt with threads");
MyThreadPool<string> pool = new MyThreadPool<string>();
string[] files = Directory.GetFiles(@"c:\cygwin64", "*.*", SearchOption.AllDirectories);
for (int i = 0, cpt = files.Length; i < cpt; ++i)
{
pool.Enqueue(files[i]);
}
pool.DoWork((string s) =>
{
Console.WriteLine(s);
Thread.Sleep(100);
});
Console.WriteLine("Main finished");
Console.ReadKey(true);
}
}
static class GZip
{
public static void CompressFile(string param)
{
FileInfo fileToCompress = new FileInfo(param);
using (FileStream originalFileStream = fileToCompress.OpenRead())
{
Console.WriteLine("Compressing {0}.", fileToCompress.FullName);
using (FileStream compressedFileStream = File.Create(fileToCompress.FullName + ".gz"))
{
using (GZipStream compressionStream = new GZipStream(compressedFileStream, CompressionLevel.Optimal))
{
originalFileStream.CopyTo(compressionStream);
}
}
FileInfo info = new FileInfo(fileToCompress.FullName + ".gz");
Console.WriteLine("Compressed {0} from {1} to {2} bytes.", fileToCompress.FullName, fileToCompress.Length.ToString(), info.Length.ToString());
}
fileToCompress.Delete();
}
}
class MyThreadPool<T> : Queue<T> where T:class
{
public delegate void JobDelegate(T param);
struct JobInfo
{
public JobDelegate Job;
public T Param;
public Thread Thread;
}
int MaxWorkers;
List<Thread> Workers = null;
Semaphore Sem = null;
public MyThreadPool() : this(Environment.ProcessorCount)
{
}
public MyThreadPool(int maxWorkers)
{
if (maxWorkers < 1) maxWorkers = 1;
MaxWorkers = maxWorkers;
Workers = new List<Thread>(MaxWorkers);
}
public void DoWork(JobDelegate job)
{
Sem = new Semaphore(MaxWorkers, MaxWorkers);
while (Count > 0)
{
Thread thread;
Console.WriteLine("Waits for a free worker");
Sem.WaitOne();
thread = new Thread(DoJob);
lock(Workers)
{
Workers.Add(thread);
}
thread.Priority = ThreadPriority.BelowNormal;
thread.Start(new JobInfo()
{
Job = job,
Param = Dequeue(),
Thread = thread
});
}
do
{
Thread thread;
lock (Workers)
{
thread = Workers.FirstOrDefault();
}
if (thread == null)
{
// thread can only be null when Workers list is empty
// => No more thread to wait.
break;
}
else
{
Console.WriteLine("Wait for the worker to ends");
thread.Join();
}
} while (true);
}
private void DoJob(object param)
{
JobInfo info = (JobInfo)param;
try
{
info.Job(info.Param);
}
finally
{
Sem.Release();
}
lock(Workers)
{
Workers.Remove(info.Thread);
}
}
}
} |
Comment faire une queue de threads ?
Répondre avec citation
Envoyé par StringBuilder
;
Partager