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
    18
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