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-rw-r--r--test/core/util/port.h10
1 files changed, 8 insertions, 2 deletions
diff --git a/test/core/util/port.h b/test/core/util/port.h
index 93788bcab2..faeabbae9b 100644
--- a/test/core/util/port.h
+++ b/test/core/util/port.h
@@ -40,10 +40,16 @@ extern "C" {
/* pick a port number that is currently unused by either tcp or udp. return
0 on failure. */
-int grpc_pick_unused_port();
+int grpc_pick_unused_port(void);
/* pick a port number that is currently unused by either tcp or udp. abort
on failure. */
-int grpc_pick_unused_port_or_die();
+int grpc_pick_unused_port_or_die(void);
+
+/* Return a port which was previously returned by grpc_pick_unused_port().
+ * Implementations of grpc_pick_unused_port() backed by a portserver may limit
+ * the total number of ports available; this lets a binary return its allocated
+ * ports back to the server if it is going to allocate a large number. */
+void grpc_recycle_unused_port(int port);
#ifdef __cplusplus
}