From 0d8a269d4bbb18fa509e642ae2eaec8a8c80a1c3 Mon Sep 17 00:00:00 2001 From: patacongo Date: Sun, 13 Jan 2013 00:35:47 +0000 Subject: Cosmetic cleanup from SIGCHLD changes git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5514 42af7a65-404d-4744-a932-0658087f49c3 --- apps/examples/ostest/sighand.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'apps/examples') diff --git a/apps/examples/ostest/sighand.c b/apps/examples/ostest/sighand.c index 63d9590d9..32b182c21 100644 --- a/apps/examples/ostest/sighand.c +++ b/apps/examples/ostest/sighand.c @@ -57,7 +57,12 @@ static bool threadexited = false; #ifdef CONFIG_SCHED_HAVE_PARENT static void death_of_child(int signo, siginfo_t *info, void *ucontext) { - /* Use of printf in a signal handler is NOT safe! It can cause deadlocks! */ + /* Use of printf in a signal handler is NOT safe! It can cause deadlocks! + * Also, signals are not queued by NuttX. As a consequence, some + * notifications will get lost (or the info data can be overwrittedn)! + * Because POSIX does not require signals to be queued, I do not think + * that this is a bug (the overwriting is a bug, however). + */ if (info) { -- cgit v1.2.3