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53 lines
1.4 KiB
53 lines
1.4 KiB
// RUN: %clangxx -O0 -g %s -o %t && %run %t | FileCheck %s
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <time.h>
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#include <sys/timerfd.h>
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#include <unistd.h>
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int main (int argc, char** argv)
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{
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int fd = timerfd_create(CLOCK_REALTIME, 0);
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assert(fd >= 0);
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struct itimerspec its;
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its.it_value.tv_sec = 0;
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its.it_value.tv_nsec = 1000000;
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its.it_interval.tv_sec = its.it_value.tv_sec;
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its.it_interval.tv_nsec = its.it_value.tv_nsec;
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int res = timerfd_settime(fd, 0, &its, NULL);
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assert(res != -1);
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struct itimerspec its2;
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res = timerfd_settime(fd, 0, &its, &its2);
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assert(res != -1);
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assert(its2.it_interval.tv_sec == its.it_interval.tv_sec);
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assert(its2.it_interval.tv_nsec == its.it_interval.tv_nsec);
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assert(its2.it_value.tv_sec <= its.it_value.tv_sec);
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assert(its2.it_value.tv_nsec <= its.it_value.tv_nsec);
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struct itimerspec its3;
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res = timerfd_gettime(fd, &its3);
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assert(res != -1);
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assert(its3.it_interval.tv_sec == its.it_interval.tv_sec);
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assert(its3.it_interval.tv_nsec == its.it_interval.tv_nsec);
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assert(its3.it_value.tv_sec <= its.it_value.tv_sec);
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assert(its3.it_value.tv_nsec <= its.it_value.tv_nsec);
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unsigned long long buf;
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res = read(fd, &buf, sizeof(buf));
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assert(res == 8);
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assert(buf >= 1);
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res = close(fd);
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assert(res != -1);
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printf("DONE\n");
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// CHECK: DONE
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return 0;
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}
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