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 vote258 views1 answer
Python project script run
C
0 vote261 views2 answers
Memcpy in c
C
0 vote261 views1 answer
Execute maven project in cmd
C
0 vote248 views1 answer
What is wrong with this in c
C
0 vote269 views1 answer
KneesDev
C
5 votes250 views10 answers
Online python to c converter
C
25 votes279 views10 answers
Bootstrap
C
0 vote258 views1 answer
Os.listdir to array
C
1 vote271 views1 answer
Unity read text file line by line
C
0 vote272 views1 answer
Cannot read property '_id' of undefined at new Grid ReadStream
C