Questions tagged [beginthread]
30 questions
0
votes
1 answer
Starting class functions as threads loosing reference
i am working on a windows program, which does the hard work in threads
and the GUI stays in the main loop (in this case i use ImGui OpenGL3)
but with implementing more functions, the parameters are getting out of scope
when starting a…
alfetta
- 103
- 2
- 9
0
votes
1 answer
Threads not running, why?
I wrote a simple test application to prove that the threads work:
// Test.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
class clsTest {
private:
uintptr_t muintHandle;
static…
SPlatten
- 5,334
- 11
- 57
- 128
0
votes
1 answer
Suspected memory leak with _beginthread
So, i have some issues with i suspect a memory leak, in order to test i wrote this small code. By commenting the following line:
printf("Calc index: %d\n", ArrLength);
the code runs well. But when i uncomment it, the program crashed after a couple…
Jop Hoeijmakers
- 3
- 1
0
votes
3 answers
Error with free function after malloc
The code below results in a crash of C++ on the line: free(arg). I am trying to prevent a memory leak from happening but i can't manage to free the data i stored in heap memory. Can someone help me with this problem?
Note that free(args) works…
Jop Hoeijmakers
- 3
- 1
0
votes
1 answer
ShellExecute in _beginthread
I need to run for example:
ShellExecute(NULL, "open", "program.exe", NULL, NULL, SW_HIDE);
as new thread, but I don't know how.
I tried this:
HANDLE hThread = (HANDLE) _beginthread(ShellExecute(NULL, "open", "program.exe", NULL, NULL, SW_HIDE), 0,…
Lukasz Re
- 79
- 1
- 11
0
votes
0 answers
Destructor issue of shared_ptr, passed as argument to new thread
I pass params structure, which contains shared_ptr to std::deque, as input argument for function, which would work in a new thread. This deque created on the external object as a public field. And when I save shared_ptr to the params structure,…
3ka5_cat
- 121
- 1
- 12
0
votes
1 answer
Pass parameter to _beginthread function
I have following code to start a new thread
int number = 10;
_beginthread(ModbusReadWrite, 0, (void*)number);
The function is:
void ModbusReadWrite(void *arg)
{
char inBuffer[BUF_SIZE];
int PointNumber = &arg;
...
}
It shows an error:…
user3048644
- 93
- 1
- 5
- 17
0
votes
2 answers
Passing Parameters to Function When Multithreading
I have an assignment to create a game like Frogger (you know - the game where a frog has to cross the street). So far I've created the logic behind the movement of the frog and the cars but I can't seem to run the processes simultaneously. I know…
Dilyan Traykov
- 9
- 5
0
votes
0 answers
thread(_beginthreadex) winsock(accept)
i wanna make a winsock non blocking object
this is my code
main function:
#include
#include
#include "server.h"
#include
using namespace std;
int main()
{
Object_server a;
Sleep(100000);
return…
Ken
- 13
- 1
- 4
0
votes
1 answer
C++/Winforms threads: I get a build error with _beginthread
I'm new to threads and Winforms/C++. I would like to start a function in a new thread when I press a button. I was following this as a tutorial for threads. When I build the example code given on that site in a separate VC++ project, the build…
HaggarTheHorrible
- 7,083
- 20
- 70
- 81
0
votes
1 answer
The stack size argument in beginthread
I thought I knew what the stack size argument in beginthread means. So my question is: why does this work?
#include
#include
using namespace std;
void huge_stack(int a, int b, int c, int d)
{
int i[100000] = {0};
…
Borislav Stanimirov
- 1,609
- 12
- 23
0
votes
2 answers
Multithreading with _beginthread in C++/CLI
I'm having a problem with _beginthread in microsoft visual studio c++ 10 express:
my code:
void __cdecl DashThread( void * Args ) // function without any class refs
{
while(1){
MessageBox::Show("work");
Sleep(5000);
}
…
Luke
- 2,350
- 6
- 26
- 41
-1
votes
1 answer
failing create a texture in a thread
In an application i am creating, i am using several textures which i load on demand.
Till now i created them in the main process and everything works fine.
Now i wanted to load them in a separate thread.
So i call the function for loading and…
alfetta
- 103
- 2
- 9
-1
votes
1 answer
c++ _beginthread can't pass string as a parameter
I would like to start multiple threads using a sample code like below:
void ThreadFunction(void* param) {
cout << (string)param << endl;
_endthread();
}
int main(int argc, char* argv[]) {
for (unsigned int i = 1; i <= 10; i++) {
…
TVA van Hesteren
- 1,031
- 3
- 20
- 47
-1
votes
1 answer
Launching 8 threads on 8core CPU doesnt' make 100% CPU load
I'm learning to use multithreading on a simple keygen example.
I've implemented hashkeys matching algorhythm that increments one of the keys and compares it to the original and it should stop once two hashkeys match. So I need to iterate over…
Antiusninja
- 157
- 1
- 17