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-rw-r--r--src/core/msgqueue.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/core/msgqueue.h b/src/core/msgqueue.h
index 9ee4335a..6454e1df 100644
--- a/src/core/msgqueue.h
+++ b/src/core/msgqueue.h
@@ -43,8 +43,12 @@ extern void nni_msgq_fini(nni_msgq *);
// the caller is not permitted to access it further.
extern int nni_msgq_put(nni_msgq *, nni_msg *);
+// nni_msgq_tryput is like nni_msgq_put, except that it does not block,
+// if there is no room to put the message it simply returns NNG_EAGAIN.
+extern int nni_msgq_tryput(nni_msgq *, nni_msg *);
+
// nni_msgq_putback returns a message to the head of the queue.
-// This is a non-blocking operation, and it returns EAGAIN if there
+// This is a non-blocking operation, and it returns NNG_EAGAIN if there
// is no room. There is always at least room for one putback after
// a message is retried with nni_msgq_get.
extern int nni_msgq_putback(nni_msgq *, nni_msg *);