51 lines
1.5 KiB
C++
51 lines
1.5 KiB
C++
// threadtest.cc
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// Simple test case for the threads assignment.
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//
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// Create two threads, and have them context switch
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// back and forth between themselves by calling Thread::Yield,
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// to illustratethe inner workings of the thread system.
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//
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// Copyright (c) 1992-1993 The Regents of the University of California.
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// All rights reserved. See copyright.h for copyright notice and limitation
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// of liability and disclaimer of warranty provisions.
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#include "copyright.h"
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#include "system.h"
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//----------------------------------------------------------------------
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// SimpleThread
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// Loop 10 times, yielding the CPU to another ready thread
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// each iteration.
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//
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// "which" is simply a number identifying the thread, for debugging
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// purposes.
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//----------------------------------------------------------------------
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void
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SimpleThread (void *arg)
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{
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int which = (long) arg;
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int num;
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for (num = 0; num < 10; num++)
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{
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printf ("*** thread %d looped %d times\n", which, num);
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currentThread->Yield ();
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}
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}
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//----------------------------------------------------------------------
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// ThreadTest
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// Set up a ping-pong between two threads, by forking a thread
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// to call SimpleThread, and then calling SimpleThread ourselves.
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//----------------------------------------------------------------------
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void
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ThreadTest ()
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{
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DEBUG ('t', "Entering SimpleTest\n");
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Thread *t = new Thread ("forked thread");
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t->Start (SimpleThread, (void*) 1);
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SimpleThread (0);
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}
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