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* [newlib-cygwin/main] Cygwin: wincap.h: clarify NO_COPY_RO usage
@ 2023-01-12 9:52 Corinna Vinschen
0 siblings, 0 replies; only message in thread
From: Corinna Vinschen @ 2023-01-12 9:52 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=e5880bef39fd0593bfa51a01b12485f87de4251a
commit e5880bef39fd0593bfa51a01b12485f87de4251a
Author: Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Thu Jan 12 10:51:39 2023 +0100
Commit: Corinna Vinschen <corinna@vinschen.de>
CommitDate: Thu Jan 12 10:51:39 2023 +0100
Cygwin: wincap.h: clarify NO_COPY_RO usage
...and drop one unnecessary usage of NO_COPY_RO.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diff:
---
winsup/cygwin/forkable.cc | 2 +-
winsup/cygwin/local_includes/winsup.h | 6 ++++++
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/winsup/cygwin/forkable.cc b/winsup/cygwin/forkable.cc
index 350a95c3e416..fbc30ae3028f 100644
--- a/winsup/cygwin/forkable.cc
+++ b/winsup/cygwin/forkable.cc
@@ -313,7 +313,7 @@ struct namepart {
bool create_dir;
};
/* mutex name is formed along dir names */
-static namepart NO_COPY_RO const
+static namepart const
forkable_nameparts[] = {
/* text textfunc mutex_from_dir create */
{ L"<cygroot>", rootname, false, false, },
diff --git a/winsup/cygwin/local_includes/winsup.h b/winsup/cygwin/local_includes/winsup.h
index c54440fa808d..c9788de8f012 100644
--- a/winsup/cygwin/local_includes/winsup.h
+++ b/winsup/cygwin/local_includes/winsup.h
@@ -10,6 +10,12 @@ details. */
#define __INSIDE_CYGWIN__
+/* Use "static NO_COPY_RO" instead of "static const", if the datastructure
+ should be R/O, but without the "const" qualifier. Typically this is only
+ required if the static datastructure is "const" in reality, but the Windows
+ function is defined with a R/W type as argument. Unfortunately this is
+ often the case. However, make sure to try "const" first, and use
+ "NO_COPY_RO" as seldom as possible. */
#define NO_COPY_RO __attribute__((nocommon)) __attribute__((section(".rdata_cygwin_nocopy")))
#define NO_COPY __attribute__((nocommon)) __attribute__((section(".data_cygwin_nocopy")))
#define NO_COPY_INIT __attribute__((section(".data_cygwin_nocopy")))
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