1 files changed, 43 insertions, 1 deletions

diff --git a/include/grpc/grpc.h b/include/grpc/grpc.h
index 1b33d48c02..5874710bd4 100644
--- a/include/grpc/grpc.h
+++ b/include/grpc/grpc.h
@@ -93,9 +93,51 @@ GRPCAPI const char *grpc_version_string(void);
 /** Return a string specifying what the 'g' in gRPC stands for */
 GRPCAPI const char *grpc_g_stands_for(void);
 
-/** Create a completion queue */
+/** Specifies the type of APIs to use to pop events from the completion queue */
+typedef enum {
+  /** Events are popped out by calling grpc_completion_queue_next() API ONLY */
+  GRPC_CQ_NEXT = 1,
+  /** Events are popped out by calling grpc_completion_queue_pluck() API ONLY*/
+  GRPC_CQ_PLUCK
+} grpc_cq_completion_type;
+
+/** Completion queues internally MAY maintain a set of file descriptors in a
+    structure called 'pollset'. This enum specifies if a completion queue has an
+    associated pollset and any restrictions on the type of file descriptors that
+    can be present in the pollset.
+
+    I/O progress can only be made when grpc_completion_queue_next() or
+    grpc_completion_queue_pluck() are called on the completion queue (unless the
+    grpc_cq_polling_type is NON_POLLING) and hence it is very important to
+    actively call these APIs */
+typedef enum {
+  /** The completion queue will have an associated pollset and there is no
+      restriction on the type of file descriptors the pollset may contain */
+  DEFAULT_POLLING,
+
+  /** Similar to DEFAULT_POLLING except that the completion queues will not
+      contain any 'listening file descriptors' (i.e file descriptors used to
+      listen to incoming channels */
+  NON_LISTENING,
+
+  /** The completion queue will not have an associated pollset. Note that
+      grpc_completion_queue_next() or grpc_completion_queue_pluck() MUST still
+      be called to pop events from the completion queue; it is not required to
+      call them actively to make I/O progress */
+  NON_POLLING
+} grpc_cq_polling_type;
+
+/** Create a completion queue.
+
+    WARNING: This API is deprecated and will soon be deleted and replaced with
+    completion_queue_create_ex() */
 GRPCAPI grpc_completion_queue *grpc_completion_queue_create(void *reserved);
 
+/** Create a completion queue */
+GRPCAPI grpc_completion_queue *grpc_completion_queue_create_ex(
+    grpc_cq_completion_type completion_type, grpc_cq_polling_type polling_type,
+    void *reserved);
+
 /** Blocks until an event is available, the completion queue is being shut down,
     or deadline is reached.