node/test/wasi/c/getrusage.c

35 lines
645 B
C

#include <assert.h>
#include <sys/resource.h>
int main() {
struct rusage ru1;
struct rusage ru2;
long long s1;
long long us1;
long long s2;
long long us2;
int r;
int success = 0;
r = getrusage(RUSAGE_SELF, &ru1);
assert(r == 0);
s1 = ru1.ru_utime.tv_sec;
us1 = ru1.ru_utime.tv_usec;
for (int i = 0; i < 10000; i++) {
r = getrusage(RUSAGE_SELF, &ru2);
assert(r == 0);
s2 = ru2.ru_utime.tv_sec;
us2 = ru2.ru_utime.tv_usec;
assert(s1 <= s2);
// Verify that some time has passed.
if (s2 > s1 || (s2 == s1 && us2 > us1)) {
success = 1;
break;
}
}
assert(success == 1);
}