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Fix alignment portability problems

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Do not assume that the natural alignment of Lisp objects is a
multiple of GCALIGNMENT.  This improves on the portability of the
recent fix for Bug#29040.
* lib-src/make-docfile.c (close_emacs_globals):
* src/buffer.c (buffer_defaults, buffer_local_symbols):
* src/lisp.h (DEFUN):
* src/thread.c (main_thread):
Use GCALIGNED, not alignas (GCALIGNMENT).
* src/alloc.c (COMMON_MULTIPLE):
Move back here from lisp.h, since it is no longer used elsewhere.
* src/lisp.h (GCALIGNMENT): No longer a macro, since we need not
worry about MSVC.  Omit no-longer-needed consistency check.
* src/thread.c (THREAD_ALIGNMENT): Remove.
This commit is contained in:
Paul Eggert 2017-11-02 13:06:38 -07:00
parent a9f8706fa8
commit 6b08ad5263
5 changed files with 18 additions and 23 deletions
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6
src/alloc.c
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@ -621,6 +621,12 @@ buffer_memory_full (ptrdiff_t nbytes)
#endif
}
/* A common multiple of the positive integers A and B. Ideally this
would be the least common multiple, but there's no way to do that
as a constant expression in C, so do the best that we can easily do. */
#define COMMON_MULTIPLE(a, b) \
((a) % (b) == 0 ? (a) : (b) % (a) == 0 ? (b) : (a) * (b))
#ifndef XMALLOC_OVERRUN_CHECK
#define XMALLOC_OVERRUN_CHECK_OVERHEAD 0
#else