Atomic variable c

#include <stdio.h>
#include <threads.h>
#include <stdatomic.h>

atomic_int acnt;
int cnt;

int f(void* thr_data)
{
    (void)thr_data;
    for(int n = 0; n < 1000; ++n) {
        ++cnt;
        ++acnt;
        // for this example, relaxed memory order is sufficient, e.g.
        // atomic_fetch_add_explicit(&acnt, 1, memory_order_relaxed);
    }
    return 0;
}

int main(void)
{
    thrd_t thr[10];
    for(int n = 0; n < 10; ++n)
        thrd_create(&thr[n], f, NULL);
    for(int n = 0; n < 10; ++n)
        thrd_join(thr[n], NULL);

    printf("The atomic counter is %u\n", acnt);
    printf("The non-atomic counter is %u\n", cnt);
}

Source: stackoverflow.com

Similar codes

0 vote179 views1 answer
Command line coursera
C
2 votes217 views1 answer
Printf in c
C
0 vote254 views1 answer
Ubuntu ocaml install
C
-1 vote188 views2 answers
C tutorial
C
0 vote197 views1 answer
Passing an array of unspecified number of variables to a function
C
1 vote250 views1 answer
Deallocate memory in c
C
0 vote168 views1 answer
Typescript class as function parameter
C
0 vote177 views1 answer
Prims and kruskal algorithm
C
0 vote169 views2 answers
Vim vertical line at 80 characters
C
0 vote293 views1 answer
Int main() { int sum =0; FILE * ptr; ptr = fopen("d:\\students. "," "); if (ptr ==NULL){ ("file does not exist!!"); exit(0); }
C