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| author | Paul Eggert <eggert@cs.ucla.edu> | 2019-03-19 12:37:13 -0700 |
|---|---|---|
| committer | Paul Eggert <eggert@cs.ucla.edu> | 2019-03-19 12:37:36 -0700 |
| commit | 53914a10558a0a579bb30d95da93d677901bc4a9 (patch) | |
| tree | 7fc6c0c091b7d380fbfc9b7411b3b646eed59fde /src/thread.h | |
| parent | 3ed1621d843e057ad879fbed3605d32f55a065b9 (diff) | |
| download | emacs-53914a10558a0a579bb30d95da93d677901bc4a9.tar.gz | |
Use ‘const’ to clarify GC marking
Add ‘const’ to make the GC marking code a bit clearer.
This can also help the compiler in some cases, I think because
GCC can now determine more often that the value of a static C
variable can be cached when its address is now converted to
‘Lisp Object const *’ before escaping.
* src/alloc.c (staticvec, mark_maybe_objects, mark_memory)
(mark_stack, staticpro, mark_object_root_visitor)
(garbage_collect_1):
* src/pdumper.c (dump_ptr_referrer, dump_emacs_reloc_to_lv)
(dump_emacs_reloc_to_emacs_ptr_raw, dump_root_visitor):
* src/lisp.h (vcopy, struct gc_root_visitor):
* src/sysdep.c (stack_overflow):
* src/thread.c (mark_one_thread):
* src/thread.h (struct thread_state):
Use pointer-to-const instead of plain pointer in some
GC-related places where either will do.
Diffstat (limited to 'src/thread.h')
| -rw-r--r-- | src/thread.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/thread.h b/src/thread.h index e46545baf27..cb7e60f21f8 100644 --- a/src/thread.h +++ b/src/thread.h @@ -65,7 +65,7 @@ struct thread_state /* m_stack_bottom must be the first non-Lisp field. */ /* An address near the bottom of the stack. Tells GC how to save a copy of the stack. */ - char *m_stack_bottom; + char const *m_stack_bottom; #define stack_bottom (current_thread->m_stack_bottom) /* The address of an object near the C stack top, used to determine @@ -75,7 +75,7 @@ struct thread_state error in Emacs. If the C function F calls G which calls H which calls ... F, then at least one of the functions in the chain should set this to the address of a local variable. */ - void *stack_top; + void const *stack_top; struct catchtag *m_catchlist; #define catchlist (current_thread->m_catchlist) |