From: Eric Wong <e@80x24.org>
Date: Sat, 9 Sep 2023 12:01:40 +0000 (+0000)
Subject: xap_helper: note __cleanup__ works with C++ exceptions
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3e37f2548f099c5e8412e1ba1e1fa850c9f8f295;p=thirdparty%2Fpublic-inbox.git

xap_helper: note __cleanup__ works with C++ exceptions

In case somebody reviewing this code gets curious.
---

diff --git a/lib/PublicInbox/xap_helper.h b/lib/PublicInbox/xap_helper.h
index 707603676..3f45e1c70 100644
--- a/lib/PublicInbox/xap_helper.h
+++ b/lib/PublicInbox/xap_helper.h
@@ -322,6 +322,9 @@ struct dump_roots_tmp {
 	int root2id_fd;
 };
 
+// n.b. __cleanup__ works fine with C++ exceptions, but not longjmp
+// Only clang and g++ are supported, as AFAIK there's no other
+// relevant Free(-as-in-speech) C++ compilers.
 #define CLEANUP_FBUF __attribute__((__cleanup__(fbuf_ensure)))
 static void fbuf_ensure(void *ptr)
 {