_beginthreadex静态成员函数 [英] _beginthreadex static member function

问题描述

如何创建静态成员函数的线程例程

How do I create a thread routine of a static member function

class Blah
{
    static void WINAPI Start();
};

// .. 
// ...
// ....

hThread = (HANDLE)_beginthreadex(NULL, 0, CBlah::Start, NULL, NULL, NULL);

这给我以下错误：

***error C2664: '_beginthreadex' : cannot convert parameter 3 from 'void (void)' to 'unsigned int (__stdcall *)(void *)'***

我做错了什么？

推荐答案

有时候，读取您遇到的错误很有用。

Sometimes, it is useful to read the error you're getting.

cannot convert parameter 3 from 'void (void)' to 'unsigned int (__stdcall *)(void *)'

在它说什么。对于参数三，你给它一个带有签名 void（void）的函数，即一个不带参数，不返回任何内容的函数。它无法将此转换为 _beginthreadex 的 unsigned int（__stdcall *）（void *）预期：

Let's look at what it says. For parameter three, you give it a function with the signature void(void), that is, a function which takes no arguments, and returns nothing. It fails to convert this to unsigned int (__stdcall *)(void *), which is what _beginthreadex expects:

它需要一个函数：

• unsigned int ：


• 使用 stdcall 调用约定


• 采用 void * 参数。

• Returns an unsigned int:
• Uses the stdcall calling convention
• Takes a void* argument.

我的建议是给它一个函数与它要求的签名。

So my suggestion would be "give it a function with the signature it's asking for".

class Blah
{
    static unsigned int __stdcall Start(void*);
};

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