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 vote315 views1 answer
Unpack and repack deb package
C
0 vote331 views1 answer
Time random c
C
0 vote340 views1 answer
How to make an integer value equal to character
C
0 vote310 views1 answer
Cmake boilerplate for visual studio c++ project
C
1 vote317 views1 answer
Passage on dowry
C
0 vote307 views1 answer
Shuffle function in c
C
-1 vote311 views2 answers
Printf n characters c
C
3 votes265 views2 answers
Open folder in mac
C
3 votes310 views3 answers
Clear screen c
C
0 vote329 views1 answer
C limit value range
C