Example pthread demo

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This is a guide to the pthread_demo C example project included in the EMAC OE SDK.

This is a simple pthreads example application. A single thread is created to generate random data that is read by a specified number of reader threads.

The term pthread refers to POSIX Threads, a POSIX standard for threads.

The pthread_demo project builds one executable: p_thread_demo.

Opening, Building and Uploading the Project Files

1. Import the example projects into Eclipse if not already done.

2. Build and Upload the pthread_demo project.

Usage and Behavior

The pthread_demo project is an example of multithreaded code for generating and interacting with an arbitrary number of pthreads. Within the pthread_demo.c C source file can be found demonstrations of how to, specifically:

• Create pthreads, line 90.
• Write to pthreads, line 141.
• Read from pthreads, line 127.
• Terminate and clean up after pthreads, line 119.

Hardware Requirements

The pthread_demo C example project has no special hardware requirements. It should run just fine on any system for which the project files can be successfully compiled.

Using pthread_demo

./pthread_demo n

where n is the number of threads

Usage Example

root@PPCE7:/tmp# ./pthread_demo 3
generating new random data
generating new random data
    reader: count = 0, data = 693451072
generating new random data
    reader: count = 1, data = 1195545710
generating new random data
    reader: count = 2, data = 462104121

Summary

The pthread_demo C example project demonstrates how to use pthreads. For another example of pthread usage see Example pthread hello.