如下情况，希望给我解答详细点，谢谢

Question

typedef unsigned long (__stdcall * THREADFUNC)(void *)是什么意思

Answer 1

这是一个函数类型THREADFUNC定义， __stdcall是函数的调用方式，函数的参数为void*类型的变量，函数返回值为unsigned long.用法加入有个函数定义为unsigned long __stdcall calcLen(void * pointer){unsigned long i = 0;while (*（pointer+i++）!= 0);return i;}THREADFUNC getlen = calcLen;char * str = "hello Zhu meimei!";unsigned long str_len = (*getlen)(str);

Answer 2

自定义函数指针类型名为THREADFUNC，可指向如下函数返回值为unsigned long，参数类型为void*，调用约定为__stdcall举个使用的例子typedef unsigned long (__stdcall * THREADFUNC)(void *);unsigned long __stdcall myfunc(void *param){*((int*)param)=1234;return 0;}int main(){THREADFUNC pf1 = &myfunc;void *param = malloc(sizeof(int));(*pf1)(param);/* 相当于myfunc(param); */return 0;}