静态构造函数和多线程 [英] static constructor and multithreading
问题描述
我正在分析与Visual Studio .NET 2003绑定的Duwamish7源代码。
可以解释为什么Monitor.Enter和Monitor。在静态构造函数中使用退出块
？代码可以在模块ApplicationLog.cs中的Project
SystemFramework中找到。以下是样本。
命名空间Duwamish7.SystemFramework {
（部分代码......）
公共类ApplicationLog {
（某些代码..）
static ApplicationLog（）{
类型myType = typeof（ApplicationLog）;
尝试{
if（！Monitor.TryEnter（myType））{
Monitor.Enter（myType）;
返回;
}
（部分代码..）
}
终于{
Monitor.Exit（myType）;
}
} //静态构造函数
} //类ApplicationLog
（部分代码......）
} //命名空间Duwamish7.SystemFramework
Mark
Marek，
代码中可能还有其他区域那些使用
类型的ApplicationLog作为锁定一段代码的对象。
获取类的类型不会导致s tatic构造函数代码解雇
（使用typeof）。
希望这会有所帮助。
-
- Nicholas Paldino [.NET / C＃MVP]
- mv*@spam.guard.caspershouse.com
" Marek" <毫安************** @ sbcglobal.net>在留言中写道
新闻：XU ******************** @ newssvr28.news.prodigy .com ...
我正在分析与Visual Studio .NET
2003绑定的Duwamish7源代码。可以解释为什么Monitor.Enter和Monitor.Exit块是
使用的在静态构造函数内？代码可以在模块ApplicationLog.cs中的Project
SystemFramework中找到。以下是样本。
命名空间Duwamish7.SystemFramework {
（一些代码......）
公共类ApplicationLog {
（一些代码..）
静态ApplicationLog（）{
输入myType = typeof（ApplicationLog）;
尝试{
if（！Monitor.TryEnter（myType））{
Monitor.Enter（myType）;
返回;
}
（有些代码..）
}
最后{
Monitor.Exit（myType） ;
}
} //静态构造函数
} //类ApplicationLog
（部分代码..）
} //名称空间Duwamish7.SystemFramework
Mark
>代码的其他区域可能正在使用
类型的ApplicationLog作为锁定一段代码的对象。
获取类的类型不会导致静态构造函数代码触发
（使用typeof）。
这是否意味着可以多次调用静态ctor ？
-
cody
免费工具，游戏和幽默
http://www.deutronium.de.vu || http://www.deutronium.tk
cody，
不，它没有。但是，仅仅因为代码锁定了特定的
类型，并不意味着应用程序其他部分的代码无法在同一类型上锁定
。
-
- Nicholas Paldino [.NET / C＃MVP]
- mv*@spam.guard.caspershouse.com
" cody" <无**************** @ gmx.net>在消息中写道
news：uR ************** @ tk2msftngp13.phx.gbl ...代码的其他区域可能正在使用
类型的ApplicationLog作为锁定一段代码的对象。<获取类的类型不会导致静态构造函数代码
fire（使用typeof）。
这是否意味着可以调用静态ctor不止一次？
-
免费工具，游戏和幽默
http://www.deutronium.de.vu || http://www.deutronium.tk
Hi,
I am analyzing Duwamish7 source code boundled with Visual Studio .NET 2003.
Could anoybody explain why the Monitor.Enter and Monitor.Exit block is used
inside a static constructor? The code can be found in Project
SystemFramework within module ApplicationLog.cs. Here comes the sample.
namespace Duwamish7.SystemFramework {
(some code...)
public class ApplicationLog {
(some code..)
static ApplicationLog() {
Type myType = typeof(ApplicationLog);
try {
if (!Monitor.TryEnter(myType)) {
Monitor.Enter(myType);
return;
}
(some code..)
}
finally {
Monitor.Exit(myType);
}
} // static constructor
} // class ApplicationLog
(some code..)
} //namespace Duwamish7.SystemFramework
Mark
Marek,
It is possible that there are other areas of the code that are using the
type of ApplicationLog as the object on which to lock a section of code.
Getting the Type of a class doesn''t cause static constructor code to fire
(using typeof).
Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com
"Marek" <ma**************@sbcglobal.net> wrote in message
news:XU********************@newssvr28.news.prodigy .com...Hi,
I am analyzing Duwamish7 source code boundled with Visual Studio .NET 2003. Could anoybody explain why the Monitor.Enter and Monitor.Exit block is used inside a static constructor? The code can be found in Project
SystemFramework within module ApplicationLog.cs. Here comes the sample.
namespace Duwamish7.SystemFramework {
(some code...)
public class ApplicationLog {
(some code..)
static ApplicationLog() {
Type myType = typeof(ApplicationLog);
try {
if (!Monitor.TryEnter(myType)) {
Monitor.Enter(myType);
return;
}
(some code..)
}
finally {
Monitor.Exit(myType);
}
} // static constructor
} // class ApplicationLog
(some code..)
} //namespace Duwamish7.SystemFramework
Mark
> It is possible that there are other areas of the code that are using
thetype of ApplicationLog as the object on which to lock a section of code.
Getting the Type of a class doesn''t cause static constructor code to fire
(using typeof).
Does that mean that a static ctor could be called more than once?
--
cody
Freeware Tools, Games and Humour
http://www.deutronium.de.vu || http://www.deutronium.tk
cody,
No, it does not. However, just because code locks on that particular
type, doesn''t mean that code in other sections of the application can''t lock
on that same type.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard.caspershouse.com
"cody" <no****************@gmx.net> wrote in message
news:uR**************@tk2msftngp13.phx.gbl...It is possible that there are other areas of the code that are using
thetype of ApplicationLog as the object on which to lock a section of code.
Getting the Type of a class doesn''t cause static constructor code to fire (using typeof).
Does that mean that a static ctor could be called more than once?
--
cody
Freeware Tools, Games and Humour
http://www.deutronium.de.vu || http://www.deutronium.tk
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