How to execute system command in parallel in c++

Question

Normally when I want to run a executable from a c++ code. I just use the code:

system("path\to\the\executable param"); 

Now, I want to run the executable file in parallel. I use 2 threads. The first thread will call:

system("path\to\the\executable param1");

The second thread will call:

system("path\to\the\executable param2");

However it doesn't run in parallel as I expect.

Is there in way to solve this?

Answer 1

• For windows: CreateProcess (see MSDN) function.
• For *NIX: first, spwan a child with fork, then replace a child code with execXX (execl, execle, execlp, execv, execvp).

Answer 2

You can run multiple commands as below:

system("path\\to\\the\\executable param1 &");
system("path\\to\\the\\executable param2");

This way both will run in parallel, and your program doesn't need to be multi-threaded for this.