expose batchcontext.Reset

src/csharp/Grpc.Core/Internal/BatchContextSafeHandle.cs

@@ -104,6 +104,11 @@ namespace Grpc.Core.Internal
             return Native.grpcsharp_batch_context_recv_close_on_server_cancelled(this) != 0;
         }
 
+        public void Reset()
+        {
+            Native.grpcsharp_batch_context_reset(this);
+        }
+
         protected override bool ReleaseHandle()
         {
             Native.grpcsharp_batch_context_destroy(handle);

src/csharp/Grpc.Core/Internal/NativeMethods.cs

@@ -52,6 +52,7 @@ namespace Grpc.Core.Internal
         public readonly Delegates.grpcsharp_batch_context_recv_status_on_client_details_delegate grpcsharp_batch_context_recv_status_on_client_details;
         public readonly Delegates.grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate grpcsharp_batch_context_recv_status_on_client_trailing_metadata;
         public readonly Delegates.grpcsharp_batch_context_recv_close_on_server_cancelled_delegate grpcsharp_batch_context_recv_close_on_server_cancelled;
+        public readonly Delegates.grpcsharp_batch_context_reset_delegate grpcsharp_batch_context_reset;
         public readonly Delegates.grpcsharp_batch_context_destroy_delegate grpcsharp_batch_context_destroy;
 
         public readonly Delegates.grpcsharp_request_call_context_create_delegate grpcsharp_request_call_context_create;
@@ -169,6 +170,7 @@ namespace Grpc.Core.Internal
             this.grpcsharp_batch_context_recv_status_on_client_details = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_details_delegate>(library);
             this.grpcsharp_batch_context_recv_status_on_client_trailing_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate>(library);
             this.grpcsharp_batch_context_recv_close_on_server_cancelled = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_close_on_server_cancelled_delegate>(library);
+            this.grpcsharp_batch_context_reset = GetMethodDelegate<Delegates.grpcsharp_batch_context_reset_delegate>(library);
             this.grpcsharp_batch_context_destroy = GetMethodDelegate<Delegates.grpcsharp_batch_context_destroy_delegate>(library);
 
             this.grpcsharp_request_call_context_create = GetMethodDelegate<Delegates.grpcsharp_request_call_context_create_delegate>(library);
@@ -311,6 +313,7 @@ namespace Grpc.Core.Internal
             public delegate IntPtr grpcsharp_batch_context_recv_status_on_client_details_delegate(BatchContextSafeHandle ctx, out UIntPtr detailsLength);
             public delegate IntPtr grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate(BatchContextSafeHandle ctx);
             public delegate int grpcsharp_batch_context_recv_close_on_server_cancelled_delegate(BatchContextSafeHandle ctx);
+            public delegate void grpcsharp_batch_context_reset_delegate(BatchContextSafeHandle ctx);
             public delegate void grpcsharp_batch_context_destroy_delegate(IntPtr ctx);
 
             public delegate RequestCallContextSafeHandle grpcsharp_request_call_context_create_delegate();

src/csharp/ext/grpc_csharp_ext.c

@@ -197,10 +197,7 @@ void grpcsharp_metadata_array_move(grpc_metadata_array* dest,
 }
 
 GPR_EXPORT void GPR_CALLTYPE
-grpcsharp_batch_context_destroy(grpcsharp_batch_context* ctx) {
-  if (!ctx) {
-    return;
-  }
+grpcsharp_batch_context_reset(grpcsharp_batch_context* ctx) {
   grpcsharp_metadata_array_destroy_metadata_including_entries(
       &(ctx->send_initial_metadata));
 
@@ -216,7 +213,15 @@ grpcsharp_batch_context_destroy(grpcsharp_batch_context* ctx) {
   grpcsharp_metadata_array_destroy_metadata_only(
       &(ctx->recv_status_on_client.trailing_metadata));
   grpc_slice_unref(ctx->recv_status_on_client.status_details);
+  memset(ctx, 0, sizeof(grpcsharp_batch_context));
+}
 
+GPR_EXPORT void GPR_CALLTYPE
+grpcsharp_batch_context_destroy(grpcsharp_batch_context* ctx) {
+  if (!ctx) {
+    return;
+  }
+  grpcsharp_batch_context_reset(ctx);
   gpr_free(ctx);
 }