service_runtime/linux/nacl_time.c

   1 /*
   2  * Copyright 2008, Google Inc.
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions are
   7  * met:
   8  *
   9  *     * Redistributions of source code must retain the above copyright
  10  * notice, this list of conditions and the following disclaimer.
  11  *     * Redistributions in binary form must reproduce the above
  12  * copyright notice, this list of conditions and the following disclaimer
  13  * in the documentation and/or other materials provided with the
  14  * distribution.
  15  *     * Neither the name of Google Inc. nor the names of its
  16  * contributors may be used to endorse or promote products derived from
  17  * this software without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 /*
  33  * NaCl Server Runtime time abstraction layer.
  34  * This is the host-OS-dependent implementation.
  35  */
  36
  37 #include <sys/time.h>
  38 #include <time.h>
  39
  40 #include "native_client/service_runtime/nacl_time.h"
  41
  42 #include "native_client/service_runtime/nacl_app_thread.h"
  43 #include "native_client/service_runtime/nacl_syscall_common.h"
  44 #include "native_client/service_runtime/sel_ldr.h"
  45 #include "native_client/service_runtime/linux/nacl_syscall_inl.h"
  46
  47 int NaClGetTimeOfDay(struct nacl_abi_timeval *tv)
  48 {
  49   struct timeval  sys_tv;
  50   int             retval;
  51
  52   retval = gettimeofday(&sys_tv, NULL);
  53   if (0 == retval) {
  54     /*
  55      * To make it harder to distinguish Linux platforms from Windows,
  56      * coarsen the time to the same level we get on Windows - milliseconds,
  57      * unless in "debug" mode.
  58      */
  59     if (!NaClHighResolutionTimerEnabled()) {
  60       sys_tv.tv_usec = (sys_tv.tv_usec / 1000) * 1000;
  61     }
  62     tv->nacl_abi_tv_sec = sys_tv.tv_sec;
  63     tv->nacl_abi_tv_usec = sys_tv.tv_usec;
  64   }
  65
  66   retval = NaClXlateSysRet(retval);
  67   return retval;
  68 }