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#include <stdio.h>
int foo(volatile *mem, int val, int c) {
int oldval = __sync_fetch_and_add(mem, val);
return oldval + c;
}
volatile int x = 0;
int main() {
long long test = 0;
int i;
int y = foo(&x, 1, 2);
printf("%d, %d\n", y, x);
y = __sync_val_compare_and_swap(&x, 1, 2);
printf("%d, %d\n", y, x);
y = __sync_lock_test_and_set(&x, 1);
printf("%d, %d\n", y, x);
for (i = 0; i < 5; i++) {
__sync_add_and_fetch(&test, 1);
printf("test = %d\n", (int)test);
}
for (i = 0; i < 5; i++) {
__sync_fetch_and_sub(&test,1);
printf("test = %d\n", (int)test);
}
return 0;
}
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