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Efficient logging of time measurements

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# 15  
Old 03-10-2013
Instead of pipes -- if you're worried about resources or blocking, simply use a single thread that reads a message queue. Once a message queue (SYSV or POSIX) is set up there is a single syscall ( e.g., msgsnd, no blocking ) that is mt-safe and a mutex is not required.

The buffersize, unlike, a pipe, can be any size. The message queue buffer is kernel persistent, so if the entire set of threads/processes using the message queue die, the data is still available. Pipes are closed on process termination.
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LEARN ABOUT DEBIAN

gvrng

gvrng(1)																  gvrng(1)

NAME

       gvrng - An interactive, introductory programming language.

SYNTAX

       gvrng [world file | program file]

DESCRIPTION

       Guido van Robot is a project developed by advanced high school students for use by their peers as a learning tool and precursor to the fur-
       ther study of programming with Python. It is a minimalistic programming language providing just enough syntax to help  students	learn  the
       concepts  of  sequencing, conditional branching, looping and procedural abstraction. It's biggest strength is that it permits this learning
       in an environment that combines the thrill of problem-solving with instant visual feedback. In short, it is  an	interactive,  introductory
       programming  language that is excellent for learning the basic concepts of programming, applicable in any high-level language. Best of all,
       it's a whole lot of fun, too!

       At this point, you are probably asking yourself, "What is GvRng, specifically?" The gist of it is that it is a robot represented by a  tri-
       angle  on  the screen that moves around in a world made up of streets and avenues, walls and "beepers", which Guido can collect or set. His
       actions are completely guided by a program written by the user.

FILES

       /usr/bin/gvrng
       /usr/lib/gvrng
       /usr/share/doc/gvrng

AUTHORS

       Stas Zytkiewicz - stasz@linux.isbeter.nl
       Waseem Daher - wdaher@mit.edu
       Steve Howell - showell@zipcon.net

SEE ALSO

       http://gvrng.sourceforge.net

Stas Zytkiewicz 						  1.0  09/13/2004							  gvrng(1)