37 lines
1.1 KiB
C++
37 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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sem->p();
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kout.setpos(55, this->id);
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kout << this->id << ": " << dec << cnt++ << endl;
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sem->v();
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}
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}
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void PreemptiveThreadDemo::run() {
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kout << "PreemptiveThreadDemo ====================================" << endl;
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kout << "Initializing Semaphore" << endl;
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Semaphore* sem = new Semaphore(1); // Create this semaphore on the heap as this thread exits itself,
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// so stack allocated objects will be lost
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kout << "Allocating LoopThread A" << endl;
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Thread* cntA = new PreemptiveLoopThread(0, sem);
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kout << "Allocating LoopThread B" << endl;
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Thread* cntB = new PreemptiveLoopThread(1, sem);
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kout << "Allocating LoopThread C" << endl;
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Thread* cntC = new PreemptiveLoopThread(2, sem);
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kout << "Adding threads to ready queue" << endl;
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scheduler.ready(cntA);
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scheduler.ready(cntB);
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scheduler.ready(cntC);
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kout << "Exiting main thread" << endl;
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scheduler.exit();
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}
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