36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
#include "user/demo/PreemptiveThreadDemo.h"
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void PreemptiveLoopThread::run() {
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int cnt = 0;
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while (true) {
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// Basic synchronization by semaphore
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// NOTE: I placed the semaphore inside the CGA_Stream so multiple demos can synchronize, not
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// only this one. This is optional so disruptions can still occur because of preemption
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kout.lock();
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// Saving + restoring kout position doesn't help much as preemption still occurs
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kout.setpos(55, this->id);
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kout << fillw(3) << this->id << fillw(0) << ": " << dec << cnt++ << endl;
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kout.unlock();
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}
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}
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void PreemptiveThreadDemo::run() {
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kout << "Preemptive Thread Demo" << endl;
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Thread* threads[this->number_of_threads];
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kout << "Allocating LoopThreads" << endl;
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for (unsigned int i = 0; i < this->number_of_threads; ++i) {
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threads[i] = new PreemptiveLoopThread(i);
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}
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kout << "Adding threads to ready queue" << endl;
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for (unsigned int i = 0; i < this->number_of_threads; ++i) {
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scheduler.ready(threads[i]);
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}
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kout << "Exiting main thread" << endl;
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scheduler.exit();
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}
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