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-rw-r--r--include/nng/nng.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/nng/nng.h b/include/nng/nng.h
index 62c6e133..04ef88ba 100644
--- a/include/nng/nng.h
+++ b/include/nng/nng.h
@@ -271,6 +271,7 @@ uint32_t nng_sockaddr_port(const nng_sockaddr *sa);
// Only one callback can be set on a given socket, and there is no way
// to retrieve the old value.
typedef enum {
+ NNG_PIPE_EV_NONE, // Used internally, must be first, never posted
NNG_PIPE_EV_ADD_PRE, // Called just before pipe added to socket
NNG_PIPE_EV_ADD_POST, // Called just after pipe added to socket
NNG_PIPE_EV_REM_POST, // Called just after pipe removed from socket