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VB.Net Tutorial/Thread/Mutex - История изменений
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в 16:40, 26 мая 2010
2010-05-26T16:40:30Z
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Admin: 1 версия
2010-05-26T12:56:05Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Global Mutex==<br />
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<source lang="vbnet">Imports System.Threading<br />
Module Module1<br />
Public Class MutexSample<br />
Shared globalMutex1 As Mutex<br />
Shared globalMutex2 As Mutex<br />
Const Counter As Integer = 100<br />
Shared Event1 As AutoResetEvent = New AutoResetEvent(False)<br />
Shared Event2 As AutoResetEvent = New AutoResetEvent(False)<br />
Shared Event3 As AutoResetEvent = New AutoResetEvent(False)<br />
Shared Event4 As AutoResetEvent = New AutoResetEvent(False)<br />
Public Sub do1()<br />
Console.WriteLine("do1 started, Mutex.WaitAll(Mutex())")<br />
Dim gMs(1) As Mutex<br />
gMs(0) = globalMutex1 <br />
gMs(1) = globalMutex2<br />
WaitHandle.WaitAll(gMs)<br />
Thread.Sleep(2000)<br />
Console.WriteLine("do1 finished, Mutex.WaitAll(Mutex())")<br />
Event1.Set()<br />
End Sub<br />
Public Sub do2()<br />
Console.WriteLine("do2 started, globalMutex1.WaitOne( )")<br />
globalMutex1.WaitOne() <br />
Console.WriteLine("do2 finished, globalMutex1.WaitOne( )")<br />
Event2.Set() <br />
End Sub<br />
Public Sub do3()<br />
Console.WriteLine("do3 started, Mutex.WaitAny(Mutex())")<br />
Dim gMs(1) As Mutex<br />
gMs(0) = globalMutex1 <br />
gMs(1) = globalMutex2<br />
Mutex.WaitAny(gMs)<br />
Console.WriteLine("do3 finished, Mutex.WaitAny(Mutex())")<br />
Event3.Set() <br />
End Sub<br />
Public Sub do4() <br />
Console.WriteLine("do4 started, globalMutex2.WaitOne( )")<br />
globalMutex2.WaitOne() <br />
Console.WriteLine("do4 finished, globalMutex2.WaitOne( )")<br />
Event4.Set() <br />
End Sub<br />
Public Sub Run() <br />
Console.WriteLine("MutexSample ...")<br />
globalMutex1 = New Mutex(True, "MyMutex") <br />
globalMutex2 = New Mutex(True) <br />
Console.WriteLine(" - Main Owns globalMutex1 and globalMutex2")<br />
Dim evs(3) As AutoResetEvent<br />
evs(0) = Event1 <br />
evs(1) = Event2 <br />
evs(2) = Event3 <br />
evs(3) = Event4 <br />
Dim tm As MutexSample = New MutexSample()<br />
Dim t1 As Thread = New Thread(New ThreadStart(AddressOf tm.do1))<br />
Dim t2 As Thread = New Thread(New ThreadStart(AddressOf tm.do2))<br />
Dim t3 As Thread = New Thread(New ThreadStart(AddressOf tm.do3))<br />
Dim t4 As Thread = New Thread(New ThreadStart(AddressOf tm.do4))<br />
t1.Start() <br />
t2.Start() <br />
t3.Start() <br />
t4.Start() <br />
Thread.Sleep(2000)<br />
Console.WriteLine(" - Main releases globalMutex1")<br />
globalMutex1.ReleaseMutex() <br />
Thread.Sleep(1000)<br />
Console.WriteLine(" - Main releases globalMutex2")<br />
globalMutex2.ReleaseMutex() <br />
End Sub<br />
End Class <br />
Sub main()<br />
Dim ms As MutexSample = New MutexSample()<br />
ms.Run()<br />
End Sub<br />
End Module</source><br />
<pre class=codeResult>MutexSample ...<br />
- Main Owns globalMutex1 and globalMutex2<br />
do1 started, Mutex.WaitAll(Mutex())<br />
do2 started, globalMutex1.WaitOne( )<br />
do3 started, Mutex.WaitAny(Mutex())<br />
do4 started, globalMutex2.WaitOne( )<br />
- Main releases globalMutex1<br />
do3 finished, Mutex.WaitAny(Mutex())<br />
^CTerminate batch job (Y/N)? n</pre></div>
Admin