[WIP] bpo-32592: Drop support for Windows Vista

Doc/library/time.rst

@@ -293,14 +293,6 @@ Functions
    The reference point of the returned value is undefined, so that only the
    difference between the results of consecutive calls is valid.
 
-   On Windows versions older than Vista, :func:`monotonic` detects
-   :c:func:`GetTickCount` integer overflow (32 bits, roll-over after 49.7 days).
-   It increases an internal epoch (reference time) by 2\ :sup:`32` each time
-   that an overflow is detected.  The epoch is stored in the process-local state
-   and so the value of :func:`monotonic` may be different in two Python
-   processes running for more than 49 days. On more recent versions of Windows
-   and on other operating systems, :func:`monotonic` is system-wide.
-
    .. versionadded:: 3.3
    .. versionchanged:: 3.5
       The function is now always available.

Doc/using/windows.rst

@@ -29,7 +29,8 @@ Supported Versions
 
 As specified in :pep:`11`, a Python release only supports a Windows platform
 while Microsoft considers the platform under extended support. This means that
-Python |version| supports Windows Vista and newer. If you require Windows XP
+Python |version| supports Windows 7 and newer. If you require Windows Vista
+support then please install Python 3.6. If you require Windows XP
 support then please install Python 3.4.
 
 Installation Steps

Misc/NEWS.d/next/Windows/2018-01-18-10-39-37.bpo-32592.EPqtd6.rst

@@ -0,0 +1,3 @@
+Drop support for Windows Vista. Windows Vista extended support ended in
+April 2017. As stated in :pep:`11`, Python 3.7 drops support for Windows
+Vista and now requires Windows 7 or newer.

Modules/posixmodule.c

@@ -11153,22 +11153,7 @@ os_cpu_count_impl(PyObject *module)
 {
     int ncpu = 0;
 #ifdef MS_WINDOWS
-    /* Vista is supported and the GetMaximumProcessorCount API is Win7+
-       Need to fallback to Vista behavior if this call isn't present */
-    HINSTANCE hKernel32;
-    hKernel32 = GetModuleHandleW(L"KERNEL32");
-
-    static DWORD(CALLBACK *_GetMaximumProcessorCount)(WORD) = NULL;
-    *(FARPROC*)&_GetMaximumProcessorCount = GetProcAddress(hKernel32,
-        "GetMaximumProcessorCount");
-    if (_GetMaximumProcessorCount != NULL) {
-        ncpu = _GetMaximumProcessorCount(ALL_PROCESSOR_GROUPS);
-    }
-    else {
-        SYSTEM_INFO sysinfo;
-        GetSystemInfo(&sysinfo);
-        ncpu = sysinfo.dwNumberOfProcessors;
-    }
+    ncpu = GetMaximumProcessorCount(ALL_PROCESSOR_GROUPS);
 #elif defined(__hpux)
     ncpu = mpctl(MPC_GETNUMSPUS, NULL, NULL);
 #elif defined(HAVE_SYSCONF) && defined(_SC_NPROCESSORS_ONLN)

PCbuild/readme.txt

@@ -14,7 +14,7 @@ Building Python using Microsoft Visual C++
 ------------------------------------------
 
 This directory is used to build CPython for Microsoft Windows NT version
-6.0 or higher (Windows Vista, Windows Server 2008, or later) on 32 and 64
+6.1 or higher (Windows 7 or later) on 32 and 64
 bit platforms.  Using this directory requires an installation of
 Microsoft Visual Studio 2017 (MSVC 14.1) with the *Python workload* and
 its optional *Python native development* component selected. (For