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30 lines
780 B
C
30 lines
780 B
C
#include "kernel/barrier.h"
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void barrierInit(Barrier *b, u64 thread_count) {
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b->count = 0;
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b->thread_total = thread_count;
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semaphoreInit(&b->throttle, 0);
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semaphoreInit(&b->lock, 1);
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semaphoreInit(&b->thread_wait, 0);
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}
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void barrierWait(Barrier *b) {
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semaphoreWait(&b->lock);
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if(b->count < b->thread_total) {
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b->count++;
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}
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if(b->count < b->thread_total) {
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semaphoreSignal(&b->lock);
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semaphoreWait(&b->thread_wait);
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semaphoreSignal(&b->throttle);
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}
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else if(b->count == b->thread_total) {
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for(int i = 0; i < b->thread_total-1; i++) {
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semaphoreSignal(&b->thread_wait);
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semaphoreWait(&b->throttle);
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}
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b->count = 0;
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semaphoreSignal(&b->lock);
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}
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}
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