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Calling Scripts from C++

Posted on 2011-09-02
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Last Modified: 2013-11-27
How do I call a script (.bat, .PHP) asynchronously from C++.  Using system or CreateProcess causes my program to hang until the script is complete.  Thanks
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Question by:andyshab
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3 Comments
 
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Expert Comment

by:-null-
ID: 36474191
Hi,

There are a number of ways you could achieve this, the most logical is to run the system call in a new thread.

Multithreaded programming is outside of the scope of this little box, but a quick google will bring up some really good examples

-null-
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by:andyshab
ID: 36474215
A thread makes sense but seems like overkill.  I am currently called CreateProcess and not waiting for the process, just closing the hProcess and hThread handle right away.  This seems to work as long as I'm not leaking any resources.
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tampnic earned 1000 total points
ID: 36478220
CreateProcess() creates a new process, thus a new thread. It shouldn't block, unless you are calling WaitForObject() in your code. CreateProcess() might hang around for a bit while Windows creates the new process so that a process handle can be returned by CreateProcess().

If you absolutely require the minimum wait time, you could call CreateThread() in your application and call CreateProcess() in the thread function, thus allowing your main application to continue with the minimum of hanging about. If your Windows environment is taking a long time to create a process, it might take nearly as long to set up a thread though. That needs evaluating in your target environment.

Cheers,
  Chris
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