multithreading - C++ multi threaded scheduling application issues -


background

i maintaining windows mfc c++ multi threaded job scheduling application. users schedule tasks run local computer. inactive users automatically transfer tasks active users.

issues

some jobs failing run. same jobs, not same jobs. there 2 jobs fail. have varying expected run times. both scheduled run on non-overlapping time intervals 1 another.

method creating processes:

the location of job fed following function:

 int virtualgriddriver::runapplicationasprocesswithexitcode(cstring cmdline)  {     process_information processinformation = {0};     startupinfo startupinfo                = {0};     startupinfo.cb                         = sizeof(startupinfo);     int nstrbuffer                         = cmdline.getlength() + 50;      //create process     bool result = createprocess(null, cmdline.getbuffer(nstrbuffer),                                  null, null, false,                                  normal_priority_class | create_no_window,                                  null, null, &startupinfo, &processinformation);     cmdline.releasebuffer();       if (!result)     {       //createprocess() failed       //get error system        lpvoid lpmsgbuf;        dword dw = getlasterror();        formatmessage(format_message_allocate_buffer | format_message_from_system | format_message_ignore_inserts,                       null, dw, makelangid(lang_neutral, sublang_default), (lptstr) &lpmsgbuf, 0, null);        //display error        cstring strerror = (lptstr) lpmsgbuf;        //free resources created system        localfree(lpmsgbuf);        //we failed.        return 1;     }     else     {       //successfully created process.  wait finish.        waitforsingleobject( processinformation.hprocess, infinite );        dword b;        getexitcodeprocess (processinformation.hprocess, &b);        //close handles.        closehandle( processinformation.hprocess );        closehandle( processinformation.hthread );         int ret = int(b);        //we succeeded.        return ret;     }  }

the failed jobs return exit code 1. can identify possible issues? if not, can provide issues may consider looking more into? multithreaded issue?


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