mirror of https://github.com/t1meshift/os_labs.git
32 lines
618 B
C
32 lines
618 B
C
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "mythreads.h"
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#include "main-header.h"
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#include "vector-header.h"
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// taken from https://en.wikipedia.org/wiki/Fetch-and-add
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int fetch_and_add(int * variable, int value) {
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asm volatile("lock; xaddl %%eax, %2;"
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:"=a" (value)
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:"a" (value), "m" (*variable)
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:"memory");
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return value;
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}
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void vector_add(vector_t *v_dst, vector_t *v_src) {
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int i;
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for (i = 0; i < VECTOR_SIZE; i++) {
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fetch_and_add(&v_dst->values[i], v_src->values[i]);
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}
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}
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void fini() {}
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#include "main-common.c"
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