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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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4
src/buffer.c
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@ -61,7 +61,7 @@ struct buffer *all_buffers;
Setting the default value also goes through the alist of buffers
and stores into each buffer that does not say it has a local value. */
struct buffer alignas (GCALIGNMENT) buffer_defaults;
struct buffer GCALIGNED buffer_defaults;
/* This structure marks which slots in a buffer have corresponding
default values in buffer_defaults.
@ -84,7 +84,7 @@ struct buffer buffer_local_flags;
/* This structure holds the names of symbols whose values may be
buffer-local. It is indexed and accessed in the same way as the above. */
struct buffer alignas (GCALIGNMENT) buffer_local_symbols;
struct buffer GCALIGNED buffer_local_symbols;
/* Return the symbol of the per-buffer variable at offset OFFSET in
the buffer structure. */