我可以在主线程中使用 alloc() 而在另一个线程中使用 free() 吗？
我有一个程序可以在 MacOS 和 Linux 上运行良好，并使用 mingw 交叉编译到 Windows。最近我把程序变成了多线程。
该程序的当前设计在主线程中分配了内存，并在从属“工作”线程中释放了内存。这在 MacOS 和 Linux 上不是问题，因为 malloc/free 系统是多线程的。
然而，我担心交叉编译。我使用的 mingw 版本是从 MacOS 端口构建的。这是 2004 年的一个相当古老的 G++ 版本（版本 3.4.5）。我尝试构建更新的版本但没有成功（我想构建 64 位版本，但放弃了）。我从 http://sourceware.org/pthreads-win32 获取 pthread。
我担心的是 malloc 和3.4.5中的免费系统不是多线程的。
问题：
我应该重写我的程序，以便将要释放的内存块传递回主线程以在那里释放吗？
我应该尝试升级到更新的 mingw 吗？
除了大量测试之外，还有什么方法可以发现这些并发问题吗？这对我来说感觉不太好。
谢谢！
I have a program that runs fine on MacOS and Linux and cross-compiles to Windows with mingw. Recently I made the program multi-threaded.
The current design of the program has memory allocated in the main thread and freed in the slave "worker" threads. That's not a problem on MacOS and Linux because the malloc/free system is multi-threaded.
I'm concerned about the cross-compiling, however. The version of mingw that I'm using is built from MacOS ports. It's a pretty ancient version of G++ (version 3.4.5) from 2004. I've been unsuccessful in my attempts to build a more recent version (I'd like to build a 64-bit version, but gave up). I'm getting pthreads from http://sourceware.org/pthreads-win32.
My concern is that the malloc & free system in 3.4.5 is not multi-threaded.
Questions:
Should I rewrite my program so that the blocks of memory to be freed are passed back to the main thread to be freed there?
Should I try to upgrade to a more recent mingw?
Is there any way to find these concurrency problems other than massive amounts of testing? That just doesn't feel good to me.
Thanks!
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为什么说malloc & free不是多线程吗？
mingw32 默认情况下会与 msvcrt.dll 链接，这是一个多线程 dll。参见[1]。 Microsoft 提供了[2]一个单线程库，但它仅可用于静态链接。
PS：你提到你正在交叉编译，但你似乎是在Windows中编译Windows程序。在这种情况下，为什么不从 www.mingw.org 下载二进制文件呢？ （不过，在下载中找出所需的文件是一件很痛苦的事情）
1- http://msdn.microsoft.com/en-us/library/abx4dbyh%28v=VS.71%29.aspx
2- 请参阅 [1]。在 Visual Studio 2005 中删除 http://msdn.microsoft.com/en-us/library/abx4dbyh%28v=VS.80%29.aspx
Why do you say malloc & free are not multithreaded?
mingw32 by default will link with msvcrt.dll which is a multithread dll. See [1]. There was[2] a single-threaded library provided by Microsoft, but it was only available for static linking.
PS: You mention that you are cross-compiling but you seem instead to be compiling the windows program in windows. In such case, Why don't you dowload the binaries from www.mingw.org? (it's a pain to figure out in their downloads the files needed, though)
1- http://msdn.microsoft.com/en-us/library/abx4dbyh%28v=VS.71%29.aspx
2- See [1]. Removed in Visual Studio 2005 http:// msdn.microsoft.com/en-us/library/abx4dbyh%28v=VS.80%29.aspx