}
return ((usec * TICKS_PER_SECOND) / 1000000);
-#elif defined(HAVE_CLOCK_GETTIME) && defined(CLOCK_THREAD_CPUTIME_ID)
- // clock_gettime() gives us per-thread CPU time. It isn't
- // reliable on Linux, but it's the best we have.
- struct timespec ts;
- int res;
- res = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
- if (res == 0) {
- return ((Ticks)ts.tv_sec * TICKS_PER_SECOND +
- ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
+#elif !defined(BE_CONSERVATIVE) && defined(HAVE_CLOCK_GETTIME) && defined (_POSIX_THREAD_CPUTIME) && defined(CLOCK_THREAD_CPUTIME_ID) && defined(HAVE_SYSCONF)
+ if (sysconf(_POSIX_THREAD_CPUTIME) != -1) {
+ // clock_gettime() gives us per-thread CPU time. It isn't
+ // reliable on Linux, but it's the best we have.
+ struct timespec ts;
+ int res;
+ res = clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts);
+ if (res == 0) {
+ return ((Ticks)ts.tv_sec * TICKS_PER_SECOND +
+ ((Ticks)ts.tv_nsec * TICKS_PER_SECOND) / 1000000000);
+ }
}
#endif
return getProcessCPUTime();