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gh-142490: for macOS, use vm_page_size directly from the kernel header #142491

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gh-142490: for macOS, use vm_page_size directly from the kernel header #142491

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2 changes: 2 additions & 0 deletions Misc/NEWS.d/next/Library/2025-12-09-15-26-02.gh-issue-142490.-ov3D8.rst
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Original file line number Diff line number Diff line change
@@ -0,0 +1,2 @@
It comes straight from the mach header as a global variable. No need to call
to get it.
7 changes: 6 additions & 1 deletion Modules/_ctypes/malloc_closure.c
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Expand Up @@ -12,6 +12,9 @@
# if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
# define MAP_ANONYMOUS MAP_ANON
# endif
# if defined(__APPLE__)
# include <mach/vm_page_size.h>
# endif
#endif
#include "ctypes.h"
#include "pycore_mmap.h" // _PyAnnotateMemoryMap()
Expand Down Expand Up @@ -55,7 +58,9 @@ static void more_core(void)
}
#else
if (!_pagesize) {
#ifdef _SC_PAGESIZE
#ifdef __APPLE__
_pagesize = vm_page_size;
#elif defined(_SC_PAGESIZE)
_pagesize = sysconf(_SC_PAGESIZE);
#else
_pagesize = getpagesize();
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