blocks|key|1347753|text|看一看：http://opensource.mlba-team.de/xdispatch/这个项目(和其他第三方lib)将lib分派引入到macosx以外的平台(windows、linux)中。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1347754|entityMap|0|LINK|mutability|MUTABLE|url|http://opensource.mlba-team.de/xdispatch/^0|4|15|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

Take a look at : <a href="http://opensource.mlba-team.de/xdispatch/" rel="noreferrer">http://opensource.mlba-team.de/xdispatch/</a>
This project (and other third-party libs) brings libdispatch into platforms(windows, linux) other than macosx

blocks|key|1636863|text|https://github.com/DrPizza/libdispatch|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1636864|entityMap|0|LINK|mutability|MUTABLE|url^0|0|12|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@$A|L|B|M|1|N]]|C|$]]|$1|D|3|-4|5|6|7|O|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|4]]]]

<a href="https://github.com/DrPizza/libdispatch">https://github.com/DrPizza/libdispatch</a>

blocks|key|86885|text|从我对它的基本理解来看，与lib分派类似的任务也是类似的。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|86886|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/dd504870(VS.100%2529.aspx)%2520for%2520unmanaged%2520code%2520and%2520[a%2520collection%2520of%2520technologies](http://msdn.microsoft.com/en-us/library/dd460693(VS.100%2529.aspx)%2520collectively%2520known%2520as%2520[Parallel%2520Extensions](http://en.wikipedia.org/wiki/Parallel_Extensions)%2520for%2520managed%2520code.%2520It%2520appears%2520to%2520me%2520that%2520GCD%2520maps%2520pretty%2520well%2520to%2520both%2520of%2520these,%2520since%2520they%2520both%2520abstract%2520work%2520units%2520(or^0|L|2|0|0^^$0|@$1|2|3|4|5|6|7|L|8|@]|9|@$A|M|B|N|1|O]]|C|$]]|$1|D|3|-4|5|6|7|P|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]]]

The Windows equivalent of libdispatch, from my basic understanding of it, is the <a href="http://msdn.microsoft.com/en-us/library/dd504870(VS.100).aspx" rel="nofollow noreferrer">Concurrency Runtime</a> for unmanaged code and <a href="http://msdn.microsoft.com/en-us/library/dd460693(VS.100).aspx" rel="nofollow noreferrer">a collection of technologies</a> collectively known as <a href="http://en.wikipedia.org/wiki/Parallel_Extensions" rel="nofollow noreferrer">Parallel Extensions</a> for managed code. It appears to me that GCD maps pretty well to both of these, since they both abstract work units (or "tasks") in a similar way.

blocks|key|1636796|text|从一些研究来看，似乎对一个端口已经有了相当大的兴趣，但是这个端口将是一个相当激烈的任务，最终可能只是API的另一个实现，而实际上并不与最初的lib分派共享重要的代码。我确实看到了一些将lib分派移植到基于而不是POSIX的建议，这将使它更容易跨平台到Windows，但即使这也不是一个容易的改变。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1636797|很可能，这绝不是一项小事业。|1636798|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

From a bit of research, it appears that there's already a fair bit of interest in a port, but that port would be a fairly drastic undertaking and might end up being basically just another implementation of the API and not actually sharing significant code with the original libdispatch. I did see some proposals to porting libdispatch to being based on the Apache Portable Runtime instead of POSIX which'd make it easier to make it cross-platform to Windows, but even this would not be an easy change.

Likely, this would be by no means a small undertaking.

blocks|key|86866|text|我认为，与其在Win32+线程池API上直接实现lib分派，不如直接在线程池API上实现lib分派，而不是在to+32上或lib分派on+APR和APR+on+Win32+32上执行lib分派。好消息是，这两个API非常相似，您可能可以自己执行端口操作。坏消息是，可能会有很多小的语义不匹配使得精确的行为难以实现的情况。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|86867|entityMap|0|LINK|mutability|MUTABLE|url|http://msdn.microsoft.com/en-us/library/ms686766(VS.85).aspx)|1^0|D|6|0|Z|6|1|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@$A|N|B|O|1|P]|$A|Q|B|R|1|S]]|C|$]]|$1|D|3|-4|5|6|7|T|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|K]]]]

I think that rather than libdispatch-on-pthreads and pthreads-on-Win32, or libdispatch-on-APR and APR-on-Win32, it might be better to implement libdispatch directly on the Win32 <a href="http://msdn.microsoft.com/en-us/library/ms686766(VS.85).aspx" rel="nofollow noreferrer">Thread Pool API</a>. The good news is that the two APIs are similar enough that you could probably do the port yourself. The bad news is that there would probably be lots of corner cases where there are small semantic mismatches that make exact behavior hard to achieve.

I’m looking into multithreading, and GCD seems like a much better option than manually writing a solution using <code>pthread.h</code> and <code>pthreads-win32</code>. However, although it looks like <code>libdispatch</code> is either working on, or soon going to be working on, most newer POSIX-compatible systems… I have to ask, what about Windows? What are the chances of <code>libdispatch</code> being ported to Windows? What are the barriers preventing that from happening?

If it came down to it, what would I need to do to preform that portage?

Edit: Some things I already know, to get the discussion started:

<ul>
<li>We need a blocks-compatible compiler that will compile on Windows, no? Will <a href="http://code.google.com/p/plblocks/" rel="noreferrer">PLBlocks</a> handle that?</li>
<li>Can we use the LLVM <a href="http://compiler-rt.llvm.org/" rel="noreferrer">blocks runtime</a>?</li>
<li>Can’t we replace all the <code>pthread.h</code> dependencies in userspace <code>libdispatch</code> with APR calls, for portability? Or, alternatively, use <code>pthreads-win32</code> I suppose…</li>
</ul>

Edit 1: I am hearing that this is completely and totally impossible, ever, because <code>libdispatch</code> depends (somehow) on <a href="http://en.wikipedia.org/wiki/Kqueue" rel="noreferrer"><code>kqueue</code></a>, which can’t be made available on Windows… does anybody know if this is true?

Could Grand Central Dispatch (`libdispatch`) ever be made available on Windows?

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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我正在研究多线程，GCD似乎比使用pthread.h和pthreads-win32手工编写解决方案要好得多。然而，尽管libdispatch看起来要么正在工作，要么即将开始开发大多数新的与POSIX兼容的系统…。我不得不问，Windows怎么办？libdispatch被移植到Windows的可能性有多大？阻止这种情况发生的障碍是什么？如果是这样的话，我需要做些什么来预演这个迁移呢？编辑:为了开始讨

问中央大调度(`libdispatch`)是否可以在Windows上使用？
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