zephyr

History

Anas Nashif f62d86c42b samples: get rid of obsolete usage of ARCH variable Using ARCH variable to select different configurations for the different architectures is misleading and conflicts with the variable ARCH being used by the build system. The variable is not needed, it is application specific and an application can be built without the need to specify ARCH on the command line. This is yet another item specific to samples and test cases that wrongfully being used and documented for every application. We need to use another variable and just make it clear it is specific to samples and how they are written. One possible solution is to have a script that gets the architecture based on the board being used. Attachments Jira: ZEP-238 Change-Id: Ieccbc087a41858fb96fb361c0aaa04705e968a4e Signed-off-by: Anas Nashif <anas.nashif@intel.com>		2016-05-12 10:57:28 +00:00
..
src	Revert "samples: philosophers: reduce stack size used"	2016-04-29 18:51:16 +00:00
Makefile	samples: get rid of obsolete usage of ARCH variable	2016-05-12 10:57:28 +00:00
README.txt	…
prj.conf	samples: get rid of obsolete usage of ARCH variable	2016-05-12 10:57:28 +00:00
prj.mdef	Revert "samples: philosophers: reduce stack size used"	2016-04-29 18:51:16 +00:00
testcase.ini	…

README.txt

Title: Dining Philosophers

Description:

An implementation of a solution to the Dining Philosophers problem
(a classic multi-thread synchronization problem).  This particular
implementation demonstrates the usage of microkernel task groups,
Mutex APIs and timer drivers from multiple (6) tasks.

The philosopher always tries to get the lowest fork first (f1 then f2).
When done, he will give back the forks in the reverse order (f2 then f1).
If he gets two forks, he is EATING.  Otherwise, he is THINKING.

Each philosopher will randomly alternate between the EATING and THINKING
states.

--------------------------------------------------------------------------------

Building and Running Project:

This microkernel project outputs to the console.  It can be built and executed
on QEMU as follows:

    make qemu

--------------------------------------------------------------------------------

Troubleshooting:

Problems caused by out-dated project information can be addressed by
issuing one of the following commands then rebuilding the project:

    make clean          # discard results of previous builds
                        # but keep existing configuration info
or
    make pristine       # discard results of previous builds
                        # and restore pre-defined configuration info

--------------------------------------------------------------------------------

Sample Output:

Philosopher 0 EATING
Philosopher 1 THINKING
Philosopher 2 THINKING
Philosopher 3 EATING
Philosopher 4 THINKING
Philosopher 5 THINKING








Demo Description
----------------
An implementation of a solution to the Dining Philosophers problem
(a classic multi-thread synchronization problem).  This particular
implementation demonstrates the usage of multiple (6) tasks
of differing priorities and the nanokernel semaphores and timers.