How can beginthread_ call another process from thread intially?

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SOCKET servsock;

struct sockaddr_in servaddr;

int servlength = sizeof(servaddr);


for(;;)
{

int prxy = accept(servsock, (SOCKADDR*)&servaddr, servlength)

return 0;

}

int newthread = beginthread_(startadress?, 0, NULL); //new thread begins//
// { how do I input parameters to run a process as this new thread?? //

What I have tried:

//I have tried loop, code brackets, passed arg to run a process//
//within that thread// 
//what options do I have to run a process for newly created thread if any?//
beginthread_(threadsrt, 0, thrdprcss)
while(thrdprcss,<=100)
{


int thredprcssfd = someCfunctionapi(int value)

}

Posted 3-Oct-22 14:28pm

tricityterminal

Updated 6-Oct-22 4:11am

v2

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3 solutions

Solution 2

The documentation (_beginthread, _beginthreadex | Microsoft Learn[^]) provides sample code (argument passing includes) for both beginthread and beginthreadex.

Posted 3-Oct-22 20:04pm

CPallini

Solution 1

At best, this code is a sketch that won't even compile. It has a useless, infinite for loop that returns after invoking accept, the result of which isn't even checked. servsock is declared with no terminating semicolon. I wonder if you're ready to write this kind of code.

That said, the pointer parameter to _beginthread (the recommended version is now _beginthreadex) is used to pass the new thread a pointer to the data that it should use. For example, I have a C++ Thread class, so I use that pointer to provide the thread with a pointer to the object that was created to wrap it. That object would normally be allocated from the heap (malloc or new) so that it will remain allocated until the thread has a chance to access it.

Posted 3-Oct-22 15:10pm

Greg Utas

Updated 3-Oct-22 15:11pm

v2

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merano99 · Accepted Answer · 2022-10-05T11:48:00

With beginthread you first start a new thread.
The thread can then start a new process with one of the exec calls.

beginthread and various exec versions are listed here:
https://learn.microsoft.com/en-us/cpp/c-runtime-library/process-and-environment-control

To start a thread first and then let it start a process doesn't make sense under Windows, because Windows can do that directly.