Add nng_shutdown() for sockets to help avoid close race.

Also we added a two phase shutdown for threads.

1 files changed, 10 insertions, 2 deletions

diff --git a/src/nng.c b/src/nng.c
index b0f39222..f3c4c294 100644
--- a/src/nng.c
+++ b/src/nng.c
@@ -42,10 +42,18 @@ nng_open(nng_socket **s, uint16_t proto)
 
 
 int
-nng_close(nng_socket *s)
+nng_shutdown(nng_socket *s)
 {
 	NNI_INIT_INT();
-	return (nni_sock_close(s));
+	return (nni_sock_shutdown(s));
+}
+
+
+void
+nng_close(nng_socket *s)
+{
+	NNI_INIT_VOID();
+	nni_sock_close(s);
 }