src/runtime/time_windows.h

   1 // Copyright 2021 The Go Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style
   3 // license that can be found in the LICENSE file.
   4
   5 // Constants for fetching time values on Windows for use in asm code.
   6
   7 // See https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
   8 // Archived copy at:
   9 // http://web.archive.org/web/20210411000829/https://wrkhpi.wordpress.com/2007/08/09/getting-os-information-the-kuser_shared_data-structure/
  10
  11 // Must read hi1, then lo, then hi2. The snapshot is valid if hi1 == hi2.
  12 // Or, on 64-bit, just read lo:hi1 all at once atomically.
  13 #define _INTERRUPT_TIME 0x7ffe0008
  14 #define _SYSTEM_TIME 0x7ffe0014
  15 #define time_lo 0
  16 #define time_hi1 4
  17 #define time_hi2 8