POSIX tutorial

[dondilworth]

Today I'm looking into the POSIX routines, hoping to get multi-processor efficiency.  I have the standard documentation for all the library and function calls, but for a beginner I still have a zillion questions.  Can anyone point me to a good tutorial on the subject?  I'd hate to pester experts with dumb (to them) questions.

DD

[dondilworth]

Super!  It works perfectly, thank you.

[andrew_4619]

If the polling loop is causing a lot of cpu activity, put a very short sleepqq of a handfulll of milliseconds in the loop. that usually makes a big differance.

[dondilworth]

Ooops... Not perfect.  The path that comes back from GET_COMMAND is

"C:\SYNOPSYSV14\.\Debug\SYNOPSYS200v14.exe"

What the spawnl() needs is

"C:/SYNOPSYSV14/Debug/SYNOPSYS200v14.exe"

So the spawnl() doesn't work.  Is there an easy way to convert that format?  Or should I process the line character by character myself?

[andrew_4619]

That is only because you are invoking from VS with debug, it is the command line being used! If you run from the system you will get a 'normal' path. That is still a valid path I think anyway, the .\ does not add anything but will still work.

[dondilworth]

There is more that that wrong.  The slashes are backwards and the path string has extra quote marks in it.  If I delete the quotes and change the backslashes to slashes, the spawn works ... but then the command string I pass is not read correctly when the new processes start up.

Is there a C++ call that will recover the path in a friendly fashion?  (I know this is a Fortran forum, but I'll try anything.)

[andrew_4619]

why use spawnlp in fortran, you could use the built in in runqq or systemqq functions for example.

Are you running from debug? The path you are getting I am sure will be what was supplied to the system to invoke the program.