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authorCarlos O'Donell <carlos@redhat.com>2019-10-04 15:58:08 -0400
committerCarlos O'Donell <carlos@redhat.com>2019-10-18 15:55:33 -0400
commit676b2f2050a354b7e1bdf4fec9406c9ed00b44f5 (patch)
treecfead1bd6afbb7cc4184d0a9aad73b043ad78425
parent95c1056962a3f2297c94ce47f0eaf0c5b6563231 (diff)
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nptl: Document AS-safe functions in cancellation.c.
Document in comments that __pthread_enable_asynccancel and
__pthread_disable_asynccancel must be AS-safe in general with
the exception of the act of cancellation.
-rw-r--r--nptl/cancellation.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/nptl/cancellation.c b/nptl/cancellation.c
index 7712845561..23d7b2b34c 100644
--- a/nptl/cancellation.c
+++ b/nptl/cancellation.c
@@ -24,7 +24,9 @@
 
 /* The next two functions are similar to pthread_setcanceltype() but
    more specialized for the use in the cancelable functions like write().
-   They do not need to check parameters etc.  */
+   They do not need to check parameters etc.  These functions must be
+   AS-safe, with the exception of the actual cancellation, because they
+   are called by wrappers around AS-safe functions like write().*/
 int
 attribute_hidden
 __pthread_enable_asynccancel (void)
@@ -59,7 +61,8 @@ __pthread_enable_asynccancel (void)
   return oldval;
 }
 
-
+/* See the comment for __pthread_enable_asynccancel regarding
+   the AS-safety of this function.  */
 void
 attribute_hidden
 __pthread_disable_asynccancel (int oldtype)