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Prefer __BIONIC_DEPRECATED_PAGE_SIZE_MACRO

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Platform and future NDK releases will have no PAGE_SIZE by default,
unless __BIONIC_DEPRECATED_PAGE_SIZE_MACRO is specified.

This ensures that when people use these headers with non-standard build
systems, they will still become aware of the changes.

Bug: 312546062
Test: build/boot
Change-Id: I29f5de2cd5d59d3cefdd45a6da1ccdd7c12f1f19
This commit is contained in:
Steven Moreland 2024-04-08 19:04:38 +00:00
parent b97459693e
commit a69e5af7ee
1 changed files with 10 additions and 1 deletions
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11
libc/include/bits/page_size.h
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@ -32,7 +32,16 @@
__BEGIN_DECLS
#if !defined(__BIONIC_NO_PAGE_SIZE_MACRO) || defined(__BIONIC_DEPRECATED_PAGE_SIZE_MACRO)
// PAGE_SIZE is going away in Android. Prefer getpagesize() instead.
//
// For more info, see https://developer.android.com/16kb-page-size.
//
// To restore the original behavior, use __BIONIC_DEPRECATED_PAGE_SIZE_MACRO.
#if (defined(__NDK_MAJOR__) && __NDK_MAJOR__ <= 27 && !defined(__BIONIC_NO_PAGE_SIZE_MACRO)) \
|| defined(__BIONIC_DEPRECATED_PAGE_SIZE_MACRO) \
|| defined(__arm__) \
|| defined(__i386__)
#define PAGE_SIZE 4096
#define PAGE_MASK (~(PAGE_SIZE - 1))
#endif