互斥鎖（Mutex）
互斥鎖是一個互斥的同步對象，意味着同一時間有且僅有一個線程可以獲取它。
互斥鎖可適用於一個共享資源每次只能被一個線程訪問的情況
函數：
//創建一個處於未獲取狀態的互斥鎖
Public Mutex（）；
//如果owned為true，互斥鎖的初始狀態就是被主線程所獲取，否則處於未獲取狀態
Public Mutex（bool owned）；
如果要獲取一個互斥鎖。應調用互斥鎖上的WaitOne()方法，該方法繼承於Thread.WaitHandle類
它處於等到狀態直至所調用互斥鎖可以被獲取，因此該方法將組織住主調線程直到指定的互斥鎖可用，如果不需要擁有互斥鎖，用ReleaseMutex方法釋放，從而使互斥鎖可以被另外一個線程所獲取。
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using
System;
using
System.Collections.Generic;
using
System.Linq;
using
System.Text;
using
System.Threading;
namespace
MyTTCon
{
class
shareRes
{
public
static
int
count = 0;
public
static
Mutex mutex =
new
Mutex();
}
class
IncThread
{
int
number;
public
Thread thrd;
public
IncThread(
string
name,
int
n)
{
thrd =
new
Thread(
this
.run);
number = n;
thrd.Name = name;
thrd.Start();
}
void
run()
{
Console.WriteLine(thrd.Name +
"正在等待 the mutex"
);
//申請
shareRes.mutex.WaitOne();
Console.WriteLine(thrd.Name +
"申請到 the mutex"
);
do
{
Thread.Sleep(1000);
shareRes.count++;
Console.WriteLine(
"In "
+ thrd.Name +
"ShareRes.count is "
+ shareRes.count);
number--;
}
while
(number > 0);
Console.WriteLine(thrd.Name +
"釋放 the nmutex"
);
// 釋放
shareRes.mutex.ReleaseMutex();
}
}
class
DecThread
{
int
number;
public
Thread thrd;
public
DecThread(
string
name,
int
n)
{
thrd =
new
Thread(
this
.run);
number = n;
thrd.Name = name;
thrd.Start();
}
void
run()
{
Console.WriteLine(thrd.Name +
"正在等待 the mutex"
);
//申請
shareRes.mutex.WaitOne();
Console.WriteLine(thrd.Name +
"申請到 the mutex"
);
do
{
Thread.Sleep(1000);
shareRes.count--;
Console.WriteLine(
"In "
+ thrd.Name +
"ShareRes.count is "
+ shareRes.count);
number--;
}
while
(number > 0);
Console.WriteLine(thrd.Name +
"釋放 the nmutex"
);
// 釋放
shareRes.mutex.ReleaseMutex();
}
}
class
Program
{
static
void
Main(
string
[] args)
{
IncThread mthrd1 =
new
IncThread(
"IncThread thread "
, 5);
DecThread mthrd2 =
new
DecThread(
"DecThread thread "
, 5);
mthrd1.thrd.Join();
mthrd2.thrd.Join();
}
}
}
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