C s masters, especially MFC s masters, about AfxBeginThread

Generally, the first two parameters are used.

afxbeginthread(unsigned int *(cdecl*)(void*),void*);

The first parameter is a function pointer, which must return an unsigned int and a void pointer.

The second parameter is the void pointer. In fact, the second argument is the argument passed into the function.

Since the thread function must be a global function, the information to be used is basically passed through the void pointer.

For example, create a new class.

struct threadinfo

Various parameters required.

threadinfo* pinfo = new threadinfo;

pinfo->*=*** assignment.

afxbeginthread(threadfunc, pinfo);

In this thread, you can't directly manipulate the UI with this.

When you need to afxbeginthread, pass this pointer in.

For example, if your class is classtest, there are two functions in it: a and b, where a is the thread function and b is the function that operates the ui.

It needs to be like this. :afxbeginthread(a, this, 0, 0, 0, null);

Then cast the argument in a.

classtest* p = (classtest*)param;

Then call p->b();

classtest, which has two functions, a, b, a is a thread function, and b is a function that manipulates the ui.

It can't be said to be a disadvantage, the total amount of CPU execution is fixed, and if you open multiple threads, it is equivalent to the CPU to be divided into several threads to execute. For a single CPU, only one thread can be executed at a time, and then he will switch to the next thread and execute again, which feels like it is happening at the same time because the switching speed is fast.

If you have a lot of calculations to perform in your thread, you can consider optimization.

The ones that start with AFX start with an impulsive modulo for the mfc can be thought of as class functions.

Of course, you can use the API's createthread no problem;

You can use closehandle to end the thread, and call it when you decide you want to end it.

However, it is important to note that the first parameter of afxbeginthread should be declared as static.