CODEWITHSUNDEEP
multithreadingvisual-c++beginthreadex
JeffR
JeffR

Reputation: 805

How to send a string to _beginthreadex for the thread to read it?

I want to use _beginthreadex and pass a character string, the name of a domain. What is the proper way/best practice to pass it?

  1. By variable itself (sDomain)?
    WCHAR sDomain[256] = {0};
    //...copy domain into sDomain
    UINT threadID = 0;
    HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, &Thread_SaveDomainName, sDomain, 0, &threadID);
  1. Or by the address of the variable (&sDomain)?
    WCHAR sDomain[256] = {0};
    //...copy domain into sDomain
    UINT threadID = 0;
    HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, &Thread_SaveDomainName, &sDomain, 0, &threadID);
  1. Or do I make a struct and pass the struct element (&sDomain[0])?
    struct strDomain {TCHAR sDomain[256];};
    strDomain *sDomain = new strDomain[1]();
    //...copy domain into strDomain[0].sDomain
    UINT threadID = 0;
    HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, &Thread_SaveDomainName, &sDomain[0], 0, &threadID);

Upvotes: 0

Views: 196

Answers (1)

superman
superman

Reputation: 46

The following is the simplest code to implement, of course you can customize some type to pass, because the thread function argument type is void, you can do any conversion

#include <iostream>
using namespace std;

UINT Thread_SaveDomainName(LPVOID params)
{
    char* szDomain = (char*)params;
    cout<<szDomain<<endl;
    
    return 0;
}

int main()
{
    char* szDomain = "8080";
    UINT threadID = -1;
    HANDLE hThread = (HANDLE)_beginthreadex(NULL, 0, &Thread_SaveDomainName, (void*)szDomain, 0, &threadID);
    
    return 0;
}

Upvotes: 1

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