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| author | Steve Huston <shuston@riverace.com> | 2000-09-20 17:08:40 +0000 |
|---|---|---|
| committer | Steve Huston <shuston@riverace.com> | 2000-09-20 17:08:40 +0000 |
| commit | 79ad6e5a1e8168e0cb2c4bc2f62997cf07807c1a (patch) | |
| tree | 684b91c497cad3c9b2126ec02a9c462c3943de92 /ace/High_Res_Timer.h | |
| parent | 9ceacb0c8df6d5db1a04411b4c95da26269d7eab (diff) | |
| download | ATCD-79ad6e5a1e8168e0cb2c4bc2f62997cf07807c1a.tar.gz | |
ChangeLogTag:Wed Sep 20 12:55:16 2000 Steve Huston <shuston@riverace.com>
Diffstat (limited to 'ace/High_Res_Timer.h')
| -rw-r--r-- | ace/High_Res_Timer.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/ace/High_Res_Timer.h b/ace/High_Res_Timer.h index ae3d4793ec1..608ed3dea55 100644 --- a/ace/High_Res_Timer.h +++ b/ace/High_Res_Timer.h @@ -81,6 +81,17 @@ public: static ACE_UINT32 global_scale_factor (void); // Returns the global_scale_factor. + // On Win32, QueryPerformanceFrequency is used as a base for the global + // scale factor. The value this returns is often too small to be usefully + // converted to "ticks"/second - it loses unacceptably high levels of + // precision. So on Win32, global_scale_factor_ is in ticks/msec, not + // ticks/usec as on all others. +#if defined (ACE_WIN32) +# define ACE_HR_SCALE_CONVERSION (ACE_ONE_SECOND_IN_MSECS) +#else +# define ACE_HR_SCALE_CONVERSION (ACE_ONE_SECOND_IN_USECS) +#endif /* ACE_WIN32 */ + static int get_env_global_scale_factor (const ACE_TCHAR *env = ACE_TEXT ("ACE_SCALE_FACTOR")); // Sets the global_scale_factor to the value in the <env> |