blocks|key|644624|text|我相信所有新引入的特性都已经涵盖了。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|644625|对于文档部分，这里是经典教程Martin+Harvey.+Multithreading+-+The+Delphi+Way.的存档副本。在阅读之后，您很可能会意识到并不需要任何贡献的库(也许，除了线程池)，请记住，框架并没有为您简化事情，它们还剥夺了您的细粒度控制。|offset|length|644626|entityMap|0|LINK|mutability|MUTABLE|url|http://web.archive.org/web/20060305174604/http://www.pergolesi.demon.co.uk/prog/threads/ToC.html^0|0|E|1B|0|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|O|8|@]|9|@$D|P|E|Q|1|R]]|A|$]]|$1|F|3|-4|5|6|7|S|8|@]|9|@]|A|$]]]|G|$H|$5|I|J|K|A|$L|M]]]]

I believe all of newly introduced features were covered already. 

For the documentation part, here is an archived copy on classic tutorial book <a href="http://web.archive.org/web/20060305174604/http://www.pergolesi.demon.co.uk/prog/threads/ToC.html" rel="noreferrer">Martin Harvey. Multithreading - The Delphi Way.</a> After reading you will most likely realize what there is no real need for any contributed libraries (except, maybe, the thread pool), remember, frameworks are not simplifying things for you, they also depriving you from the fine-grain control.

blocks|key|4727211|text|You+can+set+thread+name:+TThread.NameThreadForDebugging.|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4727212|您可以创建匿名线程(执行匿名函数的线程，不需要TThread后代对象)：TThread.CreateAnonymousThread。|4727213|这里讨论了Delphi线程框架：|4727214|4727215|Delphi+-+Threading+Frameworks;|unordered-list-item|4727216|How+Do+I+Choose+Between+the+Various+Ways+to+do+Threading+in+Delphi?|4727217|4727218|entityMap|0|LINK|mutability|MUTABLE|url|implemented+in+D2010+as+David+pointed+out|1|https://stackoverflow.com/questions/670641/delphi-threading-frameworks|2|https://stackoverflow.com/questions/3419945/how-do-i-choose-between-the-various-ways-to-do-threading-in-delphi^0|P|U|0|1K|0|0|10|T|0|0|0|0|T|1|0|0|1V|2|0|0^^$0|@$1|2|3|4|5|6|7|12|8|@$9|13|A|14|B|C]]|D|@$9|15|A|16|1|17]]|E|$]]|$1|F|3|G|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|1B|8|@]|D|@]|E|$]]|$1|J|3|-4|5|6|7|1C|8|@]|D|@]|E|$]]|$1|K|3|L|5|M|7|1D|8|@]|D|@$9|1E|A|1F|1|1G]]|E|$]]|$1|N|3|O|5|M|7|1H|8|@]|D|@$9|1I|A|1J|1|1K]]|E|$]]|$1|P|3|-4|5|6|7|1L|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1M|8|@]|D|@]|E|$]]]|R|$S|$5|T|U|V|E|$W|X]]|Y|$5|T|U|V|E|$W|Z]]|10|$5|T|U|V|E|$W|11]]]]

[You can set thread name: <code>TThread.NameThreadForDebugging</code>.] (implemented in D2010 as David pointed out)

You can create anonymous thread (a thread that executes anonymous function and doesn't need a TThread descendant object): <code>TThread.CreateAnonymousThread</code>.

Delphi threading frameworks are discussed here:

<ul>
<li><a href="https://stackoverflow.com/questions/670641/delphi-threading-frameworks">Delphi - Threading Frameworks</a>;</li>
<li><a href="https://stackoverflow.com/questions/3419945/how-do-i-choose-between-the-various-ways-to-do-threading-in-delphi">How Do I Choose Between the Various Ways to do Threading in Delphi?</a></li>
</ul>

blocks|key|4727464|text|此外，除了已经提到的内容之外：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4727465|4727466|有用于外部线程的TExternalThread包装器(可通过集成开发环境中的TThread.CurrentThread类freeze+and+thaw来访问)，现在可以对单个线程进行|unordered-list-item|offset|length|style|CODE|4727467|。|4727468|+SyncObjs单元中的许多新功能:支持condition+variables、C11、C12、C13、C14、C15等...H216、F217等|4727469|4727470|entityMap|0|LINK|mutability|MUTABLE|url|http://docwiki.embarcadero.com/RADStudio/XE2/en/Freezing_and_Thawing_Threads_in_the_Debugger|1|http://docwiki.embarcadero.com/VCL/XE2/en/SyncObjs|2|http://msdn.microsoft.com/en-us/library/windows/desktop/ms682052%2528v=vs.85%2529.aspx^0|0|0|8|F|12|L|1O|F|0|0|0|1|8|1|8|1|L|J|2|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|11|8|@]|9|@]|A|$]]|$1|C|3|D|5|E|7|12|8|@$F|13|G|14|H|I]|$F|15|G|16|H|I]]|9|@$F|17|G|18|1|19]]|A|$]]|$1|J|3|K|5|6|7|1A|8|@]|9|@]|A|$]]|$1|L|3|M|5|E|7|1B|8|@$F|1C|G|1D|H|I]]|9|@$F|1E|G|1F|1|1G]|$F|1H|G|1I|1|1J]]|A|$]]|$1|N|3|-4|5|6|7|1K|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|1L|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]|W|$5|R|S|T|A|$U|X]]|Y|$5|R|S|T|A|$U|Z]]]]

Also, in addition to what's already been mentioned:

<ul>
<li>there's <code>TExternalThread</code> wrapper for external threads (accessible via <code>TThread.CurrentThread</code> class property).</li>
<li>while debugging in the IDE, you can now <a href="http://docwiki.embarcadero.com/RADStudio/XE2/en/Freezing_and_Thawing_Threads_in_the_Debugger" rel="noreferrer">freeze and thaw</a> individual threads.</li>
<li>a lot of new stuff in <a href="http://docwiki.embarcadero.com/VCL/XE2/en/SyncObjs" rel="noreferrer"><code>SyncObjs</code></a> unit: support for <a href="http://msdn.microsoft.com/en-us/library/windows/desktop/ms682052%28v=vs.85%29.aspx" rel="noreferrer">condition variables</a>, <a href="http://docwiki.embarcadero.com/VCL/en/SyncObjs.TLightweightEvent" rel="noreferrer"><code>TLightweightEvent</code></a>, <a href="http://docwiki.embarcadero.com/VCL/en/SyncObjs.TLightweightSemaphore" rel="noreferrer"><code>TLightweightSemaphore</code></a>, <a href="http://docwiki.embarcadero.com/VCL/XE2/en/SyncObjs.TSpinLock" rel="noreferrer"><code>TSpinLock</code></a>, <a href="http://docwiki.embarcadero.com/VCL/XE2/en/SyncObjs.TSpinWait" rel="noreferrer"><code>TSpinWait</code></a>, <a href="http://docwiki.embarcadero.com/VCL/XE2/en/SyncObjs.TInterlocked" rel="noreferrer"><code>TInterlocked</code></a> and more...</li>
</ul>

blocks|key|2829878|text|我认为您所谈论的“本地”问题与TThread的实现方式无关，而是与RTL的其他方面相关：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2829879|2829880|内存管理器速度非常快，编写得也很好，但当运行在多个cores;|unordered-list-item|2829881|Reference-counted类型(如string和动态数组)上的多个并发线程时，它无法以线性方式扩展。多个类型(如string和动态数组)上的多个线程类型使用asm+lock操作码来实现原子引用计数(x64中的互锁递减/互锁递增)，这在多线程应用程序上的伸缩性也可能很差(即，当执行此操作码时，所有核心都会冻结-即使较新的CPU在这方面取得了进展，但RCU实现的伸缩性可能更好)。|2829882|2829883|这些弱点对于所有的多线程库来说都是常见的--即使是OTL也会受到this的影响。它们确实存在于非常早期的Delphi版本中，并且仍然存在于Delphi+XE2中。64位实现是相似的(甚至更慢)，并且Mac+OS平台共享完全相同的实现。|2829884|有关如何在this+other+SO+question中编写伸缩多线程应用程序，请参阅Delphi.|2829885|老实说，上面这两点只会出现在一些非常具体的应用程序中。|2829886|因此，在Delphi中没有什么需要担心的，如果你知道这些要点，并且不会在你的线程中滥用内存管理器调用或字符串进程。|2829887|entityMap|0|LINK|mutability|MUTABLE|url|http://en.wikipedia.org/wiki/Read-copy-update|1|http://otl.17slon.com/|2|https://stackoverflow.com/questions/7226675|3|https://stackoverflow.com/questions/6072269/need-multi-threading-memory-manager/6076407#6076407^0|F|7|0|0|0|L|6|1O|6|2E|4|4Y|3|0|0|0|P|3|1|W|4|2|0|5|M|3|0|0|0^^$0|@$1|2|3|4|5|6|7|18|8|@$9|19|A|1A|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]|$1|G|3|H|5|I|7|1C|8|@]|D|@]|E|$]]|$1|J|3|K|5|I|7|1D|8|@$9|1E|A|1F|B|C]|$9|1G|A|1H|B|C]|$9|1I|A|1J|B|C]]|D|@$9|1K|A|1L|1|1M]]|E|$]]|$1|L|3|-4|5|6|7|1N|8|@]|D|@]|E|$]]|$1|M|3|N|5|6|7|1O|8|@]|D|@$9|1P|A|1Q|1|1R]|$9|1S|A|1T|1|1U]]|E|$]]|$1|O|3|P|5|6|7|1V|8|@]|D|@$9|1W|A|1X|1|1Y]]|E|$]]|$1|Q|3|R|5|6|7|1Z|8|@]|D|@]|E|$]]|$1|S|3|T|5|6|7|20|8|@]|D|@]|E|$]]|$1|U|3|-4|5|6|7|21|8|@]|D|@]|E|$]]]|V|$W|$5|X|Y|Z|E|$10|11]]|12|$5|X|Y|Z|E|$10|13]]|14|$5|X|Y|Z|E|$10|15]]|16|$5|X|Y|Z|E|$10|17]]]]

I think the "native" issues you are talking about are not related to the way <code>TThread</code> is implemented, but to other aspects of the RTL:

<ul>
<li>The memory manager is very fast and well written, but it fails to scale in a linear way when running with a number of concurrent threads on multiple cores;</li>
<li>Reference-counted types (like <code>string</code> and dynamic arrays) are implemented with an asm <code>lock</code> opcode to have atomic reference counting (InterlockedDecrement/InterlockedIncrement in x64), which may also scale badly on multi-threaded applications (that is, all cores freezes when this opcode is executed - even if newer CPUs made progress about this, an <a href="http://en.wikipedia.org/wiki/Read-copy-update" rel="nofollow noreferrer">RCU</a> implementation may scale better).</li>
</ul>

Those weakness are common to all multi-thread libraries - even <a href="http://otl.17slon.com" rel="nofollow noreferrer">OTL</a> will suffer about <a href="https://stackoverflow.com/questions/7226675">this</a>. They do exist since very early Delphi versions, and are still there with Delphi XE2. The 64 bit implementation is similar (even slower), and the Mac OS platform shares the very same implementation.

Please see <a href="https://stackoverflow.com/questions/6072269/need-multi-threading-memory-manager/6076407#6076407">this other SO question</a> about how to write scaling multi-threaded applications in Delphi.

To be honest, both points above will appear only on some very specific kind of applications.

So there is nothing to worry about multi-threading in Delphi, if you know those points, and do not abuse of memory manager calls or string process in your threads.

blocks|key|2829781|text|gabr可能提到了主要的新功能。剩下的可能是TThread.Synchronize和TThread.Queue的新重载，它们现在可以执行匿名方法。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|2829782|entityMap^0|M|J|16|D|0^^$0|@$1|2|3|4|5|6|7|H|8|@$9|I|A|J|B|C]|$9|K|A|L|B|C]]|D|@]|E|$]]|$1|F|3|-4|5|6|7|M|8|@]|D|@]|E|$]]]|G|$]]

gabr probably mentioned main new additions. What was left probably is the new overloads for <code>TThread.Synchronize</code> and <code>TThread.Queue</code> which can now execute anonymous methods.

blocks|key|4727559|text|XE中引入了TThreadedQueue。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4727560|我发现它对于将信息从工作线程传递到主线程或其他使用者线程很有用。最后一部分，有多个消费者线程，不幸的是有buggy。TMonitor是Delphi2009引入的一个类，用于在TThreadedQueue中同步对队列的访问，其中存在一个错误。|4727561|已针对XE2修复此问题。请参阅tthreadedqueue-not-capable-of-multiple-consumers|offset|length|4727562|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/4856306/tthreadedqueue-not-capable-of-multiple-consumers^0|0|0|F|1C|0|0^^$0|@$1|2|3|4|5|6|7|P|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Q|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|R|8|@]|9|@$F|S|G|T|1|U]]|A|$]]|$1|H|3|-4|5|6|7|V|8|@]|9|@]|A|$]]]|I|$J|$5|K|L|M|A|$N|O]]]]

TThreadedQueue was introduced in XE. 

I find it useful for passing information from worker threads to the main thread or other consumer threads. The last part, having multiple consumer threads, was buggy unfortunately. There was a bug in TMonitor, a class introduced by Delphi 2009, used to synchronize access to the queue in TThreadedQueue.

This has been fixed for XE2. See <a href="https://stackoverflow.com/questions/4856306/tthreadedqueue-not-capable-of-multiple-consumers">tthreadedqueue-not-capable-of-multiple-consumers</a>

I have seen some time ago people discussing about the new multithreading in Delphi XE and about the fact that Delphi has some 'native' problems because of the way it implements multithreading. And they were recommending some external libraries to replace the default Delphi multithreading.

Can you point me to some documentation and the most popular multithreading library for Delphi XE?
Thanks

What is new in multithreading in Delphi XE?

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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不久前，我看到人们在讨论Delphi XE中的新多线程，以及Delphi由于实现多线程的方式而存在一些“本机”问题的事实。他们还推荐了一些外部库来替代默认的Delphi多线程。你能给我推荐一些文档和最流行的Delphi XE多线程库吗？谢谢

问Delphi XE中的多线程有什么新功能？
EN

回答 6

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问Delphi XE中的多线程有什么新功能？
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