Create an arglist for _beginthread function

Posted on 2000-03-03
Last Modified: 2008-02-01
For the beginthread function in the process library for c on windows, I am able to specify an argument list for the function I wish to call when starting the thread.  However, I can get this to work fine when there is one parameter and I pass in, say an int, just this one.  But what happens if I need to pass the function more than one parameter, e.g. an int and a char*?
I have tried to send the function a string containing the variable names created with sprintf, but when debugging the thread that has been called, the parameter values are all nonsense.
Question by:Greystoke
1 Comment
LVL 86

Accepted Solution

jkr earned 50 total points
ID: 2580784
There are several ways to accomplish this, however themost common one is to pass a pointer to a data structure holding the information you need, e.g.

typedef struct _tagTHREAD_PARAMETER_BLOCK
 int nMyInt1;
 char acString1 [ 256];
 int nMyInt2;
 char acString2[ 256];
 /* whatever you need ... */


tpb.nMyInt1 = 42;

strcpy ( tpb.acString1, "test");

_beginthread ( MyThread, 0, ( void*) tpb);

void MyThread ( void* pv)
int n;

 n = ptpb->nMyInt1;

/* ... */

Feel free to ask if you need more information!

Featured Post

Efficient way to get backups off site to Azure

This user guide provides instructions on how to deploy and configure both a StoneFly Scale Out NAS Enterprise Cloud Drive virtual machine and Veeam Cloud Connect in the Microsoft Azure Cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Have you thought about creating an iPhone application (app), but didn't even know where to get started? Here's how: ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ Important pre-programming comments: I’ve never tri…
This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use nested-loops in the C programming language.
The goal of this video is to provide viewers with basic examples to understand how to create, access, and change arrays in the C programming language.

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question