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-rw-r--r--include/zmq.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/zmq.h b/include/zmq.h
index e6fb60d..70197c9 100644
--- a/include/zmq.h
+++ b/include/zmq.h
@@ -137,6 +137,7 @@ ZMQ_EXPORT const char *zmq_strerror (int errnum);
/* allows us to pack the stucture tigher and thus improve performance. */
#define ZMQ_MSG_MORE 1
#define ZMQ_MSG_SHARED 128
+#define ZMQ_MSG_MASK 129 /* Merges all the flags */
/* A message. Note that 'content' is not a pointer to the raw data. */
/* Rather it is pointer to zmq::msg_content_t structure */