hphp/util/vdso.cpp

   1 /*
   2    +----------------------------------------------------------------------+
   3    | HipHop for PHP                                                       |
   4    +----------------------------------------------------------------------+
   5    | Copyright (c) 2010-present Facebook, Inc. (http://www.facebook.com)  |
   6    +----------------------------------------------------------------------+
   7    | This source file is subject to version 3.01 of the PHP license,      |
   8    | that is bundled with this package in the file LICENSE, and is        |
   9    | available through the world-wide-web at the following url:           |
  10    | http://www.php.net/license/3_01.txt                                  |
  11    | If you did not receive a copy of the PHP license and are unable to   |
  12    | obtain it through the world-wide-web, please send a note to          |
  13    | license@php.net so we can mail you a copy immediately.               |
  14    +----------------------------------------------------------------------+
  15 */
  16
  17 #include "hphp/util/vdso.h"
  18
  19 #ifdef FACEBOOK
  20 #include "common/time/ClockGettimeNS.h" // nolint
  21 #endif
  22
  23 #include <folly/ClockGettimeWrappers.h>
  24
  25 namespace HPHP { namespace vdso {
  26
  27 int clock_gettime(clockid_t clock, timespec* ts) {
  28 #ifdef FACEBOOK
  29   uint64_t time;
  30   constexpr uint64_t sec_to_ns = 1000000000;
  31
  32   if (clock == CLOCK_THREAD_CPUTIME_ID &&
  33       !fb_perf_get_thread_cputime_ns(&time)) {
  34     ts->tv_sec = time / sec_to_ns;
  35     ts->tv_nsec = time % sec_to_ns;
  36     return 0;
  37   }
  38 #endif
  39   return folly::chrono::clock_gettime(clock, ts);
  40 }
  41
  42 int64_t clock_gettime_ns(clockid_t clock) {
  43 #ifdef FACEBOOK
  44   uint64_t time;
  45
  46   if (clock == CLOCK_THREAD_CPUTIME_ID &&
  47       !fb_perf_get_thread_cputime_ns(&time)) {
  48     return time;
  49   }
  50 #endif
  51   return folly::chrono::clock_gettime_ns(clock);
  52 }
  53
  54 }}