Initial checkin of gRPC to third_party/

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

Index: third_party/grpc/src/csharp/Grpc.Core/Internal/NativeMethods.cs
diff --git a/third_party/grpc/src/csharp/Grpc.Core/Internal/NativeMethods.cs b/third_party/grpc/src/csharp/Grpc.Core/Internal/NativeMethods.cs
new file mode 100644
index 0000000000000000000000000000000000000000..19a573581e0827589019b801863ffb223d914421
--- /dev/null
+++ b/third_party/grpc/src/csharp/Grpc.Core/Internal/NativeMethods.cs
@@ -0,0 +1,823 @@
+#region Copyright notice and license
+
+// Copyright 2015-2016, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//     * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+#endregion
+
+using System;
+using System.Collections.Concurrent;
+using System.Diagnostics;
+using System.IO;
+using System.Reflection;
+using System.Runtime.InteropServices;
+using System.Threading;
+
+using Grpc.Core.Logging;
+using Grpc.Core.Utils;
+
+namespace Grpc.Core.Internal
+{
+    /// <summary>
+    /// Provides access to all native methods provided by <c>NativeExtension</c>.
+    /// An extra level of indirection is added to P/Invoke calls to allow intelligent loading
+    /// of the right configuration of the native extension based on current platform, architecture etc.
+    /// </summary>
+    internal class NativeMethods
+    {
+        #region Native methods
+
+        public readonly Delegates.grpcsharp_init_delegate grpcsharp_init;
+        public readonly Delegates.grpcsharp_shutdown_delegate grpcsharp_shutdown;
+        public readonly Delegates.grpcsharp_version_string_delegate grpcsharp_version_string;
+
+        public readonly Delegates.grpcsharp_batch_context_create_delegate grpcsharp_batch_context_create;
+        public readonly Delegates.grpcsharp_batch_context_recv_initial_metadata_delegate grpcsharp_batch_context_recv_initial_metadata;
+        public readonly Delegates.grpcsharp_batch_context_recv_message_length_delegate grpcsharp_batch_context_recv_message_length;
+        public readonly Delegates.grpcsharp_batch_context_recv_message_to_buffer_delegate grpcsharp_batch_context_recv_message_to_buffer;
+        public readonly Delegates.grpcsharp_batch_context_recv_status_on_client_status_delegate grpcsharp_batch_context_recv_status_on_client_status;
+        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_server_rpc_new_call_delegate grpcsharp_batch_context_server_rpc_new_call;
+        public readonly Delegates.grpcsharp_batch_context_server_rpc_new_method_delegate grpcsharp_batch_context_server_rpc_new_method;
+        public readonly Delegates.grpcsharp_batch_context_server_rpc_new_host_delegate grpcsharp_batch_context_server_rpc_new_host;
+        public readonly Delegates.grpcsharp_batch_context_server_rpc_new_deadline_delegate grpcsharp_batch_context_server_rpc_new_deadline;
+        public readonly Delegates.grpcsharp_batch_context_server_rpc_new_request_metadata_delegate grpcsharp_batch_context_server_rpc_new_request_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_destroy_delegate grpcsharp_batch_context_destroy;
+
+        public readonly Delegates.grpcsharp_composite_call_credentials_create_delegate grpcsharp_composite_call_credentials_create;
+        public readonly Delegates.grpcsharp_call_credentials_release_delegate grpcsharp_call_credentials_release;
+
+        public readonly Delegates.grpcsharp_call_cancel_delegate grpcsharp_call_cancel;
+        public readonly Delegates.grpcsharp_call_cancel_with_status_delegate grpcsharp_call_cancel_with_status;
+        public readonly Delegates.grpcsharp_call_start_unary_delegate grpcsharp_call_start_unary;
+        public readonly Delegates.grpcsharp_call_start_client_streaming_delegate grpcsharp_call_start_client_streaming;
+        public readonly Delegates.grpcsharp_call_start_server_streaming_delegate grpcsharp_call_start_server_streaming;
+        public readonly Delegates.grpcsharp_call_start_duplex_streaming_delegate grpcsharp_call_start_duplex_streaming;
+        public readonly Delegates.grpcsharp_call_send_message_delegate grpcsharp_call_send_message;
+        public readonly Delegates.grpcsharp_call_send_close_from_client_delegate grpcsharp_call_send_close_from_client;
+        public readonly Delegates.grpcsharp_call_send_status_from_server_delegate grpcsharp_call_send_status_from_server;
+        public readonly Delegates.grpcsharp_call_recv_message_delegate grpcsharp_call_recv_message;
+        public readonly Delegates.grpcsharp_call_recv_initial_metadata_delegate grpcsharp_call_recv_initial_metadata;
+        public readonly Delegates.grpcsharp_call_start_serverside_delegate grpcsharp_call_start_serverside;
+        public readonly Delegates.grpcsharp_call_send_initial_metadata_delegate grpcsharp_call_send_initial_metadata;
+        public readonly Delegates.grpcsharp_call_set_credentials_delegate grpcsharp_call_set_credentials;
+        public readonly Delegates.grpcsharp_call_get_peer_delegate grpcsharp_call_get_peer;
+        public readonly Delegates.grpcsharp_call_destroy_delegate grpcsharp_call_destroy;
+
+        public readonly Delegates.grpcsharp_channel_args_create_delegate grpcsharp_channel_args_create;
+        public readonly Delegates.grpcsharp_channel_args_set_string_delegate grpcsharp_channel_args_set_string;
+        public readonly Delegates.grpcsharp_channel_args_set_integer_delegate grpcsharp_channel_args_set_integer;
+        public readonly Delegates.grpcsharp_channel_args_destroy_delegate grpcsharp_channel_args_destroy;
+
+        public readonly Delegates.grpcsharp_override_default_ssl_roots grpcsharp_override_default_ssl_roots;
+        public readonly Delegates.grpcsharp_ssl_credentials_create_delegate grpcsharp_ssl_credentials_create;
+        public readonly Delegates.grpcsharp_composite_channel_credentials_create_delegate grpcsharp_composite_channel_credentials_create;
+        public readonly Delegates.grpcsharp_channel_credentials_release_delegate grpcsharp_channel_credentials_release;
+
+        public readonly Delegates.grpcsharp_insecure_channel_create_delegate grpcsharp_insecure_channel_create;
+        public readonly Delegates.grpcsharp_secure_channel_create_delegate grpcsharp_secure_channel_create;
+        public readonly Delegates.grpcsharp_channel_create_call_delegate grpcsharp_channel_create_call;
+        public readonly Delegates.grpcsharp_channel_check_connectivity_state_delegate grpcsharp_channel_check_connectivity_state;
+        public readonly Delegates.grpcsharp_channel_watch_connectivity_state_delegate grpcsharp_channel_watch_connectivity_state;
+        public readonly Delegates.grpcsharp_channel_get_target_delegate grpcsharp_channel_get_target;
+        public readonly Delegates.grpcsharp_channel_destroy_delegate grpcsharp_channel_destroy;
+
+        public readonly Delegates.grpcsharp_sizeof_grpc_event_delegate grpcsharp_sizeof_grpc_event;
+
+        public readonly Delegates.grpcsharp_completion_queue_create_delegate grpcsharp_completion_queue_create;
+        public readonly Delegates.grpcsharp_completion_queue_shutdown_delegate grpcsharp_completion_queue_shutdown;
+        public readonly Delegates.grpcsharp_completion_queue_next_delegate grpcsharp_completion_queue_next;
+        public readonly Delegates.grpcsharp_completion_queue_pluck_delegate grpcsharp_completion_queue_pluck;
+        public readonly Delegates.grpcsharp_completion_queue_destroy_delegate grpcsharp_completion_queue_destroy;
+
+        public readonly Delegates.gprsharp_free_delegate gprsharp_free;
+
+        public readonly Delegates.grpcsharp_metadata_array_create_delegate grpcsharp_metadata_array_create;
+        public readonly Delegates.grpcsharp_metadata_array_add_delegate grpcsharp_metadata_array_add;
+        public readonly Delegates.grpcsharp_metadata_array_count_delegate grpcsharp_metadata_array_count;
+        public readonly Delegates.grpcsharp_metadata_array_get_key_delegate grpcsharp_metadata_array_get_key;
+        public readonly Delegates.grpcsharp_metadata_array_get_value_delegate grpcsharp_metadata_array_get_value;
+        public readonly Delegates.grpcsharp_metadata_array_get_value_length_delegate grpcsharp_metadata_array_get_value_length;
+        public readonly Delegates.grpcsharp_metadata_array_destroy_full_delegate grpcsharp_metadata_array_destroy_full;
+
+        public readonly Delegates.grpcsharp_redirect_log_delegate grpcsharp_redirect_log;
+
+        public readonly Delegates.grpcsharp_metadata_credentials_create_from_plugin_delegate grpcsharp_metadata_credentials_create_from_plugin;
+        public readonly Delegates.grpcsharp_metadata_credentials_notify_from_plugin_delegate grpcsharp_metadata_credentials_notify_from_plugin;
+
+        public readonly Delegates.grpcsharp_ssl_server_credentials_create_delegate grpcsharp_ssl_server_credentials_create;
+        public readonly Delegates.grpcsharp_server_credentials_release_delegate grpcsharp_server_credentials_release;
+
+        public readonly Delegates.grpcsharp_server_create_delegate grpcsharp_server_create;
+        public readonly Delegates.grpcsharp_server_add_insecure_http2_port_delegate grpcsharp_server_add_insecure_http2_port;
+        public readonly Delegates.grpcsharp_server_add_secure_http2_port_delegate grpcsharp_server_add_secure_http2_port;
+        public readonly Delegates.grpcsharp_server_start_delegate grpcsharp_server_start;
+        public readonly Delegates.grpcsharp_server_request_call_delegate grpcsharp_server_request_call;
+        public readonly Delegates.grpcsharp_server_cancel_all_calls_delegate grpcsharp_server_cancel_all_calls;
+        public readonly Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate grpcsharp_server_shutdown_and_notify_callback;
+        public readonly Delegates.grpcsharp_server_destroy_delegate grpcsharp_server_destroy;
+
+        public readonly Delegates.gprsharp_now_delegate gprsharp_now;
+        public readonly Delegates.gprsharp_inf_future_delegate gprsharp_inf_future;
+        public readonly Delegates.gprsharp_inf_past_delegate gprsharp_inf_past;
+        public readonly Delegates.gprsharp_convert_clock_type_delegate gprsharp_convert_clock_type;
+        public readonly Delegates.gprsharp_sizeof_timespec_delegate gprsharp_sizeof_timespec;
+
+        public readonly Delegates.grpcsharp_test_callback_delegate grpcsharp_test_callback;
+        public readonly Delegates.grpcsharp_test_nop_delegate grpcsharp_test_nop;
+
+        #endregion
+
+        public NativeMethods(UnmanagedLibrary library)
+        {
+            if (PlatformApis.IsLinux || PlatformApis.IsMacOSX)
+            {
+                this.grpcsharp_init = GetMethodDelegate<Delegates.grpcsharp_init_delegate>(library);
+                this.grpcsharp_shutdown = GetMethodDelegate<Delegates.grpcsharp_shutdown_delegate>(library);
+                this.grpcsharp_version_string = GetMethodDelegate<Delegates.grpcsharp_version_string_delegate>(library);
+
+                this.grpcsharp_batch_context_create = GetMethodDelegate<Delegates.grpcsharp_batch_context_create_delegate>(library);
+                this.grpcsharp_batch_context_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_initial_metadata_delegate>(library);
+                this.grpcsharp_batch_context_recv_message_length = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_length_delegate>(library);
+                this.grpcsharp_batch_context_recv_message_to_buffer = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_message_to_buffer_delegate>(library);
+                this.grpcsharp_batch_context_recv_status_on_client_status = GetMethodDelegate<Delegates.grpcsharp_batch_context_recv_status_on_client_status_delegate>(library);
+                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_server_rpc_new_call = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_call_delegate>(library);
+                this.grpcsharp_batch_context_server_rpc_new_method = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_method_delegate>(library);
+                this.grpcsharp_batch_context_server_rpc_new_host = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_host_delegate>(library);
+                this.grpcsharp_batch_context_server_rpc_new_deadline = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_deadline_delegate>(library);
+                this.grpcsharp_batch_context_server_rpc_new_request_metadata = GetMethodDelegate<Delegates.grpcsharp_batch_context_server_rpc_new_request_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_destroy = GetMethodDelegate<Delegates.grpcsharp_batch_context_destroy_delegate>(library);
+
+                this.grpcsharp_composite_call_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_call_credentials_create_delegate>(library);
+                this.grpcsharp_call_credentials_release = GetMethodDelegate<Delegates.grpcsharp_call_credentials_release_delegate>(library);
+
+                this.grpcsharp_call_cancel = GetMethodDelegate<Delegates.grpcsharp_call_cancel_delegate>(library);
+                this.grpcsharp_call_cancel_with_status = GetMethodDelegate<Delegates.grpcsharp_call_cancel_with_status_delegate>(library);
+                this.grpcsharp_call_start_unary = GetMethodDelegate<Delegates.grpcsharp_call_start_unary_delegate>(library);
+                this.grpcsharp_call_start_client_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_client_streaming_delegate>(library);
+                this.grpcsharp_call_start_server_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_server_streaming_delegate>(library);
+                this.grpcsharp_call_start_duplex_streaming = GetMethodDelegate<Delegates.grpcsharp_call_start_duplex_streaming_delegate>(library);
+                this.grpcsharp_call_send_message = GetMethodDelegate<Delegates.grpcsharp_call_send_message_delegate>(library);
+                this.grpcsharp_call_send_close_from_client = GetMethodDelegate<Delegates.grpcsharp_call_send_close_from_client_delegate>(library);
+                this.grpcsharp_call_send_status_from_server = GetMethodDelegate<Delegates.grpcsharp_call_send_status_from_server_delegate>(library);
+                this.grpcsharp_call_recv_message = GetMethodDelegate<Delegates.grpcsharp_call_recv_message_delegate>(library);
+                this.grpcsharp_call_recv_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_recv_initial_metadata_delegate>(library);
+                this.grpcsharp_call_start_serverside = GetMethodDelegate<Delegates.grpcsharp_call_start_serverside_delegate>(library);
+                this.grpcsharp_call_send_initial_metadata = GetMethodDelegate<Delegates.grpcsharp_call_send_initial_metadata_delegate>(library);
+                this.grpcsharp_call_set_credentials = GetMethodDelegate<Delegates.grpcsharp_call_set_credentials_delegate>(library);
+                this.grpcsharp_call_get_peer = GetMethodDelegate<Delegates.grpcsharp_call_get_peer_delegate>(library);
+                this.grpcsharp_call_destroy = GetMethodDelegate<Delegates.grpcsharp_call_destroy_delegate>(library);
+
+                this.grpcsharp_channel_args_create = GetMethodDelegate<Delegates.grpcsharp_channel_args_create_delegate>(library);
+                this.grpcsharp_channel_args_set_string = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_string_delegate>(library);
+                this.grpcsharp_channel_args_set_integer = GetMethodDelegate<Delegates.grpcsharp_channel_args_set_integer_delegate>(library);
+                this.grpcsharp_channel_args_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_args_destroy_delegate>(library);
+
+                this.grpcsharp_override_default_ssl_roots = GetMethodDelegate<Delegates.grpcsharp_override_default_ssl_roots>(library);
+                this.grpcsharp_ssl_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_credentials_create_delegate>(library);
+                this.grpcsharp_composite_channel_credentials_create = GetMethodDelegate<Delegates.grpcsharp_composite_channel_credentials_create_delegate>(library);
+                this.grpcsharp_channel_credentials_release = GetMethodDelegate<Delegates.grpcsharp_channel_credentials_release_delegate>(library);
+
+                this.grpcsharp_insecure_channel_create = GetMethodDelegate<Delegates.grpcsharp_insecure_channel_create_delegate>(library);
+                this.grpcsharp_secure_channel_create = GetMethodDelegate<Delegates.grpcsharp_secure_channel_create_delegate>(library);
+                this.grpcsharp_channel_create_call = GetMethodDelegate<Delegates.grpcsharp_channel_create_call_delegate>(library);
+                this.grpcsharp_channel_check_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_check_connectivity_state_delegate>(library);
+                this.grpcsharp_channel_watch_connectivity_state = GetMethodDelegate<Delegates.grpcsharp_channel_watch_connectivity_state_delegate>(library);
+                this.grpcsharp_channel_get_target = GetMethodDelegate<Delegates.grpcsharp_channel_get_target_delegate>(library);
+                this.grpcsharp_channel_destroy = GetMethodDelegate<Delegates.grpcsharp_channel_destroy_delegate>(library);
+
+                this.grpcsharp_sizeof_grpc_event = GetMethodDelegate<Delegates.grpcsharp_sizeof_grpc_event_delegate>(library);
+
+                this.grpcsharp_completion_queue_create = GetMethodDelegate<Delegates.grpcsharp_completion_queue_create_delegate>(library);
+                this.grpcsharp_completion_queue_shutdown = GetMethodDelegate<Delegates.grpcsharp_completion_queue_shutdown_delegate>(library);
+                this.grpcsharp_completion_queue_next = GetMethodDelegate<Delegates.grpcsharp_completion_queue_next_delegate>(library);
+                this.grpcsharp_completion_queue_pluck = GetMethodDelegate<Delegates.grpcsharp_completion_queue_pluck_delegate>(library);
+                this.grpcsharp_completion_queue_destroy = GetMethodDelegate<Delegates.grpcsharp_completion_queue_destroy_delegate>(library);
+
+                this.gprsharp_free = GetMethodDelegate<Delegates.gprsharp_free_delegate>(library);
+
+                this.grpcsharp_metadata_array_create = GetMethodDelegate<Delegates.grpcsharp_metadata_array_create_delegate>(library);
+                this.grpcsharp_metadata_array_add = GetMethodDelegate<Delegates.grpcsharp_metadata_array_add_delegate>(library);
+                this.grpcsharp_metadata_array_count = GetMethodDelegate<Delegates.grpcsharp_metadata_array_count_delegate>(library);
+                this.grpcsharp_metadata_array_get_key = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_key_delegate>(library);
+                this.grpcsharp_metadata_array_get_value = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_delegate>(library);
+                this.grpcsharp_metadata_array_get_value_length = GetMethodDelegate<Delegates.grpcsharp_metadata_array_get_value_length_delegate>(library);
+                this.grpcsharp_metadata_array_destroy_full = GetMethodDelegate<Delegates.grpcsharp_metadata_array_destroy_full_delegate>(library);
+
+                this.grpcsharp_redirect_log = GetMethodDelegate<Delegates.grpcsharp_redirect_log_delegate>(library);
+
+                this.grpcsharp_metadata_credentials_create_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_create_from_plugin_delegate>(library);
+                this.grpcsharp_metadata_credentials_notify_from_plugin = GetMethodDelegate<Delegates.grpcsharp_metadata_credentials_notify_from_plugin_delegate>(library);
+
+                this.grpcsharp_ssl_server_credentials_create = GetMethodDelegate<Delegates.grpcsharp_ssl_server_credentials_create_delegate>(library);
+                this.grpcsharp_server_credentials_release = GetMethodDelegate<Delegates.grpcsharp_server_credentials_release_delegate>(library);
+
+                this.grpcsharp_server_create = GetMethodDelegate<Delegates.grpcsharp_server_create_delegate>(library);
+                this.grpcsharp_server_add_insecure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_insecure_http2_port_delegate>(library);
+                this.grpcsharp_server_add_secure_http2_port = GetMethodDelegate<Delegates.grpcsharp_server_add_secure_http2_port_delegate>(library);
+                this.grpcsharp_server_start = GetMethodDelegate<Delegates.grpcsharp_server_start_delegate>(library);
+                this.grpcsharp_server_request_call = GetMethodDelegate<Delegates.grpcsharp_server_request_call_delegate>(library);
+                this.grpcsharp_server_cancel_all_calls = GetMethodDelegate<Delegates.grpcsharp_server_cancel_all_calls_delegate>(library);
+                this.grpcsharp_server_shutdown_and_notify_callback = GetMethodDelegate<Delegates.grpcsharp_server_shutdown_and_notify_callback_delegate>(library);
+                this.grpcsharp_server_destroy = GetMethodDelegate<Delegates.grpcsharp_server_destroy_delegate>(library);
+
+                this.gprsharp_now = GetMethodDelegate<Delegates.gprsharp_now_delegate>(library);
+                this.gprsharp_inf_future = GetMethodDelegate<Delegates.gprsharp_inf_future_delegate>(library);
+                this.gprsharp_inf_past = GetMethodDelegate<Delegates.gprsharp_inf_past_delegate>(library);
+                this.gprsharp_convert_clock_type = GetMethodDelegate<Delegates.gprsharp_convert_clock_type_delegate>(library);
+                this.gprsharp_sizeof_timespec = GetMethodDelegate<Delegates.gprsharp_sizeof_timespec_delegate>(library);
+
+                this.grpcsharp_test_callback = GetMethodDelegate<Delegates.grpcsharp_test_callback_delegate>(library);
+                this.grpcsharp_test_nop = GetMethodDelegate<Delegates.grpcsharp_test_nop_delegate>(library);
+            }
+            else
+            {
+                // Windows or fallback
+                this.grpcsharp_init = PInvokeMethods.grpcsharp_init;
+                this.grpcsharp_shutdown = PInvokeMethods.grpcsharp_shutdown;
+                this.grpcsharp_version_string = PInvokeMethods.grpcsharp_version_string;
+
+                this.grpcsharp_batch_context_create = PInvokeMethods.grpcsharp_batch_context_create;
+                this.grpcsharp_batch_context_recv_initial_metadata = PInvokeMethods.grpcsharp_batch_context_recv_initial_metadata;
+                this.grpcsharp_batch_context_recv_message_length = PInvokeMethods.grpcsharp_batch_context_recv_message_length;
+                this.grpcsharp_batch_context_recv_message_to_buffer = PInvokeMethods.grpcsharp_batch_context_recv_message_to_buffer;
+                this.grpcsharp_batch_context_recv_status_on_client_status = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_status;
+                this.grpcsharp_batch_context_recv_status_on_client_details = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_details;
+                this.grpcsharp_batch_context_recv_status_on_client_trailing_metadata = PInvokeMethods.grpcsharp_batch_context_recv_status_on_client_trailing_metadata;
+                this.grpcsharp_batch_context_server_rpc_new_call = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_call;
+                this.grpcsharp_batch_context_server_rpc_new_method = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_method;
+                this.grpcsharp_batch_context_server_rpc_new_host = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_host;
+                this.grpcsharp_batch_context_server_rpc_new_deadline = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_deadline;
+                this.grpcsharp_batch_context_server_rpc_new_request_metadata = PInvokeMethods.grpcsharp_batch_context_server_rpc_new_request_metadata;
+                this.grpcsharp_batch_context_recv_close_on_server_cancelled = PInvokeMethods.grpcsharp_batch_context_recv_close_on_server_cancelled;
+                this.grpcsharp_batch_context_destroy = PInvokeMethods.grpcsharp_batch_context_destroy;
+
+                this.grpcsharp_composite_call_credentials_create = PInvokeMethods.grpcsharp_composite_call_credentials_create;
+                this.grpcsharp_call_credentials_release = PInvokeMethods.grpcsharp_call_credentials_release;
+
+                this.grpcsharp_call_cancel = PInvokeMethods.grpcsharp_call_cancel;
+                this.grpcsharp_call_cancel_with_status = PInvokeMethods.grpcsharp_call_cancel_with_status;
+                this.grpcsharp_call_start_unary = PInvokeMethods.grpcsharp_call_start_unary;
+                this.grpcsharp_call_start_client_streaming = PInvokeMethods.grpcsharp_call_start_client_streaming;
+                this.grpcsharp_call_start_server_streaming = PInvokeMethods.grpcsharp_call_start_server_streaming;
+                this.grpcsharp_call_start_duplex_streaming = PInvokeMethods.grpcsharp_call_start_duplex_streaming;
+                this.grpcsharp_call_send_message = PInvokeMethods.grpcsharp_call_send_message;
+                this.grpcsharp_call_send_close_from_client = PInvokeMethods.grpcsharp_call_send_close_from_client;
+                this.grpcsharp_call_send_status_from_server = PInvokeMethods.grpcsharp_call_send_status_from_server;
+                this.grpcsharp_call_recv_message = PInvokeMethods.grpcsharp_call_recv_message;
+                this.grpcsharp_call_recv_initial_metadata = PInvokeMethods.grpcsharp_call_recv_initial_metadata;
+                this.grpcsharp_call_start_serverside = PInvokeMethods.grpcsharp_call_start_serverside;
+                this.grpcsharp_call_send_initial_metadata = PInvokeMethods.grpcsharp_call_send_initial_metadata;
+                this.grpcsharp_call_set_credentials = PInvokeMethods.grpcsharp_call_set_credentials;
+                this.grpcsharp_call_get_peer = PInvokeMethods.grpcsharp_call_get_peer;
+                this.grpcsharp_call_destroy = PInvokeMethods.grpcsharp_call_destroy;
+
+                this.grpcsharp_channel_args_create = PInvokeMethods.grpcsharp_channel_args_create;
+                this.grpcsharp_channel_args_set_string = PInvokeMethods.grpcsharp_channel_args_set_string;
+                this.grpcsharp_channel_args_set_integer = PInvokeMethods.grpcsharp_channel_args_set_integer;
+                this.grpcsharp_channel_args_destroy = PInvokeMethods.grpcsharp_channel_args_destroy;
+
+                this.grpcsharp_override_default_ssl_roots = PInvokeMethods.grpcsharp_override_default_ssl_roots;
+                this.grpcsharp_ssl_credentials_create = PInvokeMethods.grpcsharp_ssl_credentials_create;
+                this.grpcsharp_composite_channel_credentials_create = PInvokeMethods.grpcsharp_composite_channel_credentials_create;
+                this.grpcsharp_channel_credentials_release = PInvokeMethods.grpcsharp_channel_credentials_release;
+
+                this.grpcsharp_insecure_channel_create = PInvokeMethods.grpcsharp_insecure_channel_create;
+                this.grpcsharp_secure_channel_create = PInvokeMethods.grpcsharp_secure_channel_create;
+                this.grpcsharp_channel_create_call = PInvokeMethods.grpcsharp_channel_create_call;
+                this.grpcsharp_channel_check_connectivity_state = PInvokeMethods.grpcsharp_channel_check_connectivity_state;
+                this.grpcsharp_channel_watch_connectivity_state = PInvokeMethods.grpcsharp_channel_watch_connectivity_state;
+                this.grpcsharp_channel_get_target = PInvokeMethods.grpcsharp_channel_get_target;
+                this.grpcsharp_channel_destroy = PInvokeMethods.grpcsharp_channel_destroy;
+
+                this.grpcsharp_sizeof_grpc_event = PInvokeMethods.grpcsharp_sizeof_grpc_event;
+
+                this.grpcsharp_completion_queue_create = PInvokeMethods.grpcsharp_completion_queue_create;
+                this.grpcsharp_completion_queue_shutdown = PInvokeMethods.grpcsharp_completion_queue_shutdown;
+                this.grpcsharp_completion_queue_next = PInvokeMethods.grpcsharp_completion_queue_next;
+                this.grpcsharp_completion_queue_pluck = PInvokeMethods.grpcsharp_completion_queue_pluck;
+                this.grpcsharp_completion_queue_destroy = PInvokeMethods.grpcsharp_completion_queue_destroy;
+
+                this.gprsharp_free = PInvokeMethods.gprsharp_free;
+
+                this.grpcsharp_metadata_array_create = PInvokeMethods.grpcsharp_metadata_array_create;
+                this.grpcsharp_metadata_array_add = PInvokeMethods.grpcsharp_metadata_array_add;
+                this.grpcsharp_metadata_array_count = PInvokeMethods.grpcsharp_metadata_array_count;
+                this.grpcsharp_metadata_array_get_key = PInvokeMethods.grpcsharp_metadata_array_get_key;
+                this.grpcsharp_metadata_array_get_value = PInvokeMethods.grpcsharp_metadata_array_get_value;
+                this.grpcsharp_metadata_array_get_value_length = PInvokeMethods.grpcsharp_metadata_array_get_value_length;
+                this.grpcsharp_metadata_array_destroy_full = PInvokeMethods.grpcsharp_metadata_array_destroy_full;
+
+                this.grpcsharp_redirect_log = PInvokeMethods.grpcsharp_redirect_log;
+
+                this.grpcsharp_metadata_credentials_create_from_plugin = PInvokeMethods.grpcsharp_metadata_credentials_create_from_plugin;
+                this.grpcsharp_metadata_credentials_notify_from_plugin = PInvokeMethods.grpcsharp_metadata_credentials_notify_from_plugin;
+
+                this.grpcsharp_ssl_server_credentials_create = PInvokeMethods.grpcsharp_ssl_server_credentials_create;
+                this.grpcsharp_server_credentials_release = PInvokeMethods.grpcsharp_server_credentials_release;
+
+                this.grpcsharp_server_create = PInvokeMethods.grpcsharp_server_create;
+                this.grpcsharp_server_add_insecure_http2_port = PInvokeMethods.grpcsharp_server_add_insecure_http2_port;
+                this.grpcsharp_server_add_secure_http2_port = PInvokeMethods.grpcsharp_server_add_secure_http2_port;
+                this.grpcsharp_server_start = PInvokeMethods.grpcsharp_server_start;
+                this.grpcsharp_server_request_call = PInvokeMethods.grpcsharp_server_request_call;
+                this.grpcsharp_server_cancel_all_calls = PInvokeMethods.grpcsharp_server_cancel_all_calls;
+                this.grpcsharp_server_shutdown_and_notify_callback = PInvokeMethods.grpcsharp_server_shutdown_and_notify_callback;
+                this.grpcsharp_server_destroy = PInvokeMethods.grpcsharp_server_destroy;
+
+                this.gprsharp_now = PInvokeMethods.gprsharp_now;
+                this.gprsharp_inf_future = PInvokeMethods.gprsharp_inf_future;
+                this.gprsharp_inf_past = PInvokeMethods.gprsharp_inf_past;
+                this.gprsharp_convert_clock_type = PInvokeMethods.gprsharp_convert_clock_type;
+                this.gprsharp_sizeof_timespec = PInvokeMethods.gprsharp_sizeof_timespec;
+
+                this.grpcsharp_test_callback = PInvokeMethods.grpcsharp_test_callback;
+                this.grpcsharp_test_nop = PInvokeMethods.grpcsharp_test_nop;
+            }
+        }
+
+        /// <summary>
+        /// Gets singleton instance of this class.
+        /// </summary>
+        public static NativeMethods Get()
+        {
+            return NativeExtension.Get().NativeMethods;
+        }
+
+        static T GetMethodDelegate<T>(UnmanagedLibrary library)
+            where T : class
+        {
+            var methodName = RemoveStringSuffix(typeof(T).Name, "_delegate");
+            return library.GetNativeMethodDelegate<T>(methodName);
+        }
+
+        static string RemoveStringSuffix(string str, string toRemove)
+        {
+            if (!str.EndsWith(toRemove))
+            {
+                return str;
+            }
+            return str.Substring(0, str.Length - toRemove.Length);
+        }
+
+        /// <summary>
+        /// Delegate types for all published native methods. Declared under inner class to prevent scope pollution.
+        /// </summary>
+        public class Delegates
+        {
+            public delegate void grpcsharp_init_delegate();
+            public delegate void grpcsharp_shutdown_delegate();
+            public delegate IntPtr grpcsharp_version_string_delegate();  // returns not-owned const char*
+
+            public delegate BatchContextSafeHandle grpcsharp_batch_context_create_delegate();
+            public delegate IntPtr grpcsharp_batch_context_recv_initial_metadata_delegate(BatchContextSafeHandle ctx);
+            public delegate IntPtr grpcsharp_batch_context_recv_message_length_delegate(BatchContextSafeHandle ctx);
+            public delegate void grpcsharp_batch_context_recv_message_to_buffer_delegate(BatchContextSafeHandle ctx, byte[] buffer, UIntPtr bufferLen);
+            public delegate StatusCode grpcsharp_batch_context_recv_status_on_client_status_delegate(BatchContextSafeHandle ctx);
+            public delegate IntPtr grpcsharp_batch_context_recv_status_on_client_details_delegate(BatchContextSafeHandle ctx);  // returns const char*
+            public delegate IntPtr grpcsharp_batch_context_recv_status_on_client_trailing_metadata_delegate(BatchContextSafeHandle ctx);
+            public delegate CallSafeHandle grpcsharp_batch_context_server_rpc_new_call_delegate(BatchContextSafeHandle ctx);
+            public delegate IntPtr grpcsharp_batch_context_server_rpc_new_method_delegate(BatchContextSafeHandle ctx);  // returns const char*
+            public delegate IntPtr grpcsharp_batch_context_server_rpc_new_host_delegate(BatchContextSafeHandle ctx);  // returns const char*
+            public delegate Timespec grpcsharp_batch_context_server_rpc_new_deadline_delegate(BatchContextSafeHandle ctx);
+            public delegate IntPtr grpcsharp_batch_context_server_rpc_new_request_metadata_delegate(BatchContextSafeHandle ctx);
+            public delegate int grpcsharp_batch_context_recv_close_on_server_cancelled_delegate(BatchContextSafeHandle ctx);
+            public delegate void grpcsharp_batch_context_destroy_delegate(IntPtr ctx);
+
+            public delegate CallCredentialsSafeHandle grpcsharp_composite_call_credentials_create_delegate(CallCredentialsSafeHandle creds1, CallCredentialsSafeHandle creds2);
+            public delegate void grpcsharp_call_credentials_release_delegate(IntPtr credentials);
+
+            public delegate GRPCCallError grpcsharp_call_cancel_delegate(CallSafeHandle call);
+            public delegate GRPCCallError grpcsharp_call_cancel_with_status_delegate(CallSafeHandle call, StatusCode status, string description);
+            public delegate GRPCCallError grpcsharp_call_start_unary_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+            public delegate GRPCCallError grpcsharp_call_start_client_streaming_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+            public delegate GRPCCallError grpcsharp_call_start_server_streaming_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len,
+                MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+            public delegate GRPCCallError grpcsharp_call_start_duplex_streaming_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+            public delegate GRPCCallError grpcsharp_call_send_message_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
+            public delegate GRPCCallError grpcsharp_call_send_close_from_client_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+            public delegate GRPCCallError grpcsharp_call_send_status_from_server_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, StatusCode statusCode, string statusMessage, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata);
+            public delegate GRPCCallError grpcsharp_call_recv_message_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+            public delegate GRPCCallError grpcsharp_call_recv_initial_metadata_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+            public delegate GRPCCallError grpcsharp_call_start_serverside_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+            public delegate GRPCCallError grpcsharp_call_send_initial_metadata_delegate(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+            public delegate GRPCCallError grpcsharp_call_set_credentials_delegate(CallSafeHandle call, CallCredentialsSafeHandle credentials);
+            public delegate CStringSafeHandle grpcsharp_call_get_peer_delegate(CallSafeHandle call);
+            public delegate void grpcsharp_call_destroy_delegate(IntPtr call);
+
+            public delegate ChannelArgsSafeHandle grpcsharp_channel_args_create_delegate(UIntPtr numArgs);
+            public delegate void grpcsharp_channel_args_set_string_delegate(ChannelArgsSafeHandle args, UIntPtr index, string key, string value);
+            public delegate void grpcsharp_channel_args_set_integer_delegate(ChannelArgsSafeHandle args, UIntPtr index, string key, int value);
+            public delegate void grpcsharp_channel_args_destroy_delegate(IntPtr args);
+
+            public delegate void grpcsharp_override_default_ssl_roots(string pemRootCerts);
+            public delegate ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create_delegate(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
+            public delegate ChannelCredentialsSafeHandle grpcsharp_composite_channel_credentials_create_delegate(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds);
+            public delegate void grpcsharp_channel_credentials_release_delegate(IntPtr credentials);
+
+            public delegate ChannelSafeHandle grpcsharp_insecure_channel_create_delegate(string target, ChannelArgsSafeHandle channelArgs);
+            public delegate ChannelSafeHandle grpcsharp_secure_channel_create_delegate(ChannelCredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs);
+            public delegate CallSafeHandle grpcsharp_channel_create_call_delegate(ChannelSafeHandle channel, CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline);
+            public delegate ChannelState grpcsharp_channel_check_connectivity_state_delegate(ChannelSafeHandle channel, int tryToConnect);
+            public delegate void grpcsharp_channel_watch_connectivity_state_delegate(ChannelSafeHandle channel, ChannelState lastObservedState,
+                Timespec deadline, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+            public delegate CStringSafeHandle grpcsharp_channel_get_target_delegate(ChannelSafeHandle call);
+            public delegate void grpcsharp_channel_destroy_delegate(IntPtr channel);
+
+            public delegate int grpcsharp_sizeof_grpc_event_delegate();
+
+            public delegate CompletionQueueSafeHandle grpcsharp_completion_queue_create_delegate();
+            public delegate void grpcsharp_completion_queue_shutdown_delegate(CompletionQueueSafeHandle cq);
+            public delegate CompletionQueueEvent grpcsharp_completion_queue_next_delegate(CompletionQueueSafeHandle cq);
+            public delegate CompletionQueueEvent grpcsharp_completion_queue_pluck_delegate(CompletionQueueSafeHandle cq, IntPtr tag);
+            public delegate void grpcsharp_completion_queue_destroy_delegate(IntPtr cq);
+
+            public delegate void gprsharp_free_delegate(IntPtr ptr);
+
+            public delegate MetadataArraySafeHandle grpcsharp_metadata_array_create_delegate(UIntPtr capacity);
+            public delegate void grpcsharp_metadata_array_add_delegate(MetadataArraySafeHandle array, string key, byte[] value, UIntPtr valueLength);
+            public delegate UIntPtr grpcsharp_metadata_array_count_delegate(IntPtr metadataArray);
+            public delegate IntPtr grpcsharp_metadata_array_get_key_delegate(IntPtr metadataArray, UIntPtr index);
+            public delegate IntPtr grpcsharp_metadata_array_get_value_delegate(IntPtr metadataArray, UIntPtr index);
+            public delegate UIntPtr grpcsharp_metadata_array_get_value_length_delegate(IntPtr metadataArray, UIntPtr index);
+            public delegate void grpcsharp_metadata_array_destroy_full_delegate(IntPtr array);
+
+            public delegate void grpcsharp_redirect_log_delegate(GprLogDelegate callback);
+
+            public delegate CallCredentialsSafeHandle grpcsharp_metadata_credentials_create_from_plugin_delegate(NativeMetadataInterceptor interceptor);
+            public delegate void grpcsharp_metadata_credentials_notify_from_plugin_delegate(IntPtr callbackPtr, IntPtr userData, MetadataArraySafeHandle metadataArray, StatusCode statusCode, string errorDetails);
+
+            public delegate ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create_delegate(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs, bool forceClientAuth);
+            public delegate void grpcsharp_server_credentials_release_delegate(IntPtr credentials);
+
+            public delegate ServerSafeHandle grpcsharp_server_create_delegate(CompletionQueueSafeHandle cq, ChannelArgsSafeHandle args);
+            public delegate int grpcsharp_server_add_insecure_http2_port_delegate(ServerSafeHandle server, string addr);
+            public delegate int grpcsharp_server_add_secure_http2_port_delegate(ServerSafeHandle server, string addr, ServerCredentialsSafeHandle creds);
+            public delegate void grpcsharp_server_start_delegate(ServerSafeHandle server);
+            public delegate GRPCCallError grpcsharp_server_request_call_delegate(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+            public delegate void grpcsharp_server_cancel_all_calls_delegate(ServerSafeHandle server);
+            public delegate void grpcsharp_server_shutdown_and_notify_callback_delegate(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+            public delegate void grpcsharp_server_destroy_delegate(IntPtr server);
+
+            public delegate Timespec gprsharp_now_delegate(GPRClockType clockType);
+            public delegate Timespec gprsharp_inf_future_delegate(GPRClockType clockType);
+            public delegate Timespec gprsharp_inf_past_delegate(GPRClockType clockType);
+
+            public delegate Timespec gprsharp_convert_clock_type_delegate(Timespec t, GPRClockType targetClock);
+            public delegate int gprsharp_sizeof_timespec_delegate();
+
+            public delegate GRPCCallError grpcsharp_test_callback_delegate([MarshalAs(UnmanagedType.FunctionPtr)] OpCompletionDelegate callback);
+            public delegate IntPtr grpcsharp_test_nop_delegate(IntPtr ptr);
+        }
+
+        /// <summary>
+        /// Default PInvoke bindings for native methods that are used on Windows.
+        /// Alternatively, they can also be used as a fallback on Mono
+        /// (if libgrpc_csharp_ext is installed on your system, or is made accessible through e.g. LD_LIBRARY_PATH environment variable
+        /// or using Mono's dllMap feature).
+        /// </summary>
+        private class PInvokeMethods
+        {
+            // Environment
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_init();
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_shutdown();
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_version_string();  // returns not-owned const char*
+
+            // BatchContextSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern BatchContextSafeHandle grpcsharp_batch_context_create();
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_recv_initial_metadata(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_recv_message_length(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_batch_context_recv_message_to_buffer(BatchContextSafeHandle ctx, byte[] buffer, UIntPtr bufferLen);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern StatusCode grpcsharp_batch_context_recv_status_on_client_status(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_recv_status_on_client_details(BatchContextSafeHandle ctx);  // returns const char*
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_recv_status_on_client_trailing_metadata(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CallSafeHandle grpcsharp_batch_context_server_rpc_new_call(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_method(BatchContextSafeHandle ctx);  // returns const char*
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_host(BatchContextSafeHandle ctx);  // returns const char*
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern Timespec grpcsharp_batch_context_server_rpc_new_deadline(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_batch_context_server_rpc_new_request_metadata(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern int grpcsharp_batch_context_recv_close_on_server_cancelled(BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_batch_context_destroy(IntPtr ctx);
+
+            // CallCredentialsSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CallCredentialsSafeHandle grpcsharp_composite_call_credentials_create(CallCredentialsSafeHandle creds1, CallCredentialsSafeHandle creds2);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_call_credentials_release(IntPtr credentials);
+
+            // CallSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_cancel(CallSafeHandle call);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_cancel_with_status(CallSafeHandle call, StatusCode status, string description);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_start_unary(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len, MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_start_client_streaming(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_start_server_streaming(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len,
+                MetadataArraySafeHandle metadataArray, WriteFlags writeFlags);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_start_duplex_streaming(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_send_message(CallSafeHandle call,
+                BatchContextSafeHandle ctx, byte[] send_buffer, UIntPtr send_buffer_len, WriteFlags writeFlags, bool sendEmptyInitialMetadata);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_send_close_from_client(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_send_status_from_server(CallSafeHandle call,
+                BatchContextSafeHandle ctx, StatusCode statusCode, string statusMessage, MetadataArraySafeHandle metadataArray, bool sendEmptyInitialMetadata);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_recv_message(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_recv_initial_metadata(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_start_serverside(CallSafeHandle call,
+                BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_send_initial_metadata(CallSafeHandle call,
+                BatchContextSafeHandle ctx, MetadataArraySafeHandle metadataArray);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_call_set_credentials(CallSafeHandle call, CallCredentialsSafeHandle credentials);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CStringSafeHandle grpcsharp_call_get_peer(CallSafeHandle call);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_call_destroy(IntPtr call);
+
+            // ChannelArgsSafeHandle 
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ChannelArgsSafeHandle grpcsharp_channel_args_create(UIntPtr numArgs);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_channel_args_set_string(ChannelArgsSafeHandle args, UIntPtr index, string key, string value);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_channel_args_set_integer(ChannelArgsSafeHandle args, UIntPtr index, string key, int value);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_channel_args_destroy(IntPtr args);
+
+            // ChannelCredentialsSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_override_default_ssl_roots(string pemRootCerts);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern ChannelCredentialsSafeHandle grpcsharp_ssl_credentials_create(string pemRootCerts, string keyCertPairCertChain, string keyCertPairPrivateKey);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ChannelCredentialsSafeHandle grpcsharp_composite_channel_credentials_create(ChannelCredentialsSafeHandle channelCreds, CallCredentialsSafeHandle callCreds);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_channel_credentials_release(IntPtr credentials);
+
+            // ChannelSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ChannelSafeHandle grpcsharp_insecure_channel_create(string target, ChannelArgsSafeHandle channelArgs);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ChannelSafeHandle grpcsharp_secure_channel_create(ChannelCredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CallSafeHandle grpcsharp_channel_create_call(ChannelSafeHandle channel, CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ChannelState grpcsharp_channel_check_connectivity_state(ChannelSafeHandle channel, int tryToConnect);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_channel_watch_connectivity_state(ChannelSafeHandle channel, ChannelState lastObservedState,
+                Timespec deadline, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CStringSafeHandle grpcsharp_channel_get_target(ChannelSafeHandle call);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_channel_destroy(IntPtr channel);
+
+            // CompletionQueueEvent
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern int grpcsharp_sizeof_grpc_event();
+
+            // CompletionQueueSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CompletionQueueSafeHandle grpcsharp_completion_queue_create();
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_completion_queue_shutdown(CompletionQueueSafeHandle cq);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CompletionQueueEvent grpcsharp_completion_queue_next(CompletionQueueSafeHandle cq);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CompletionQueueEvent grpcsharp_completion_queue_pluck(CompletionQueueSafeHandle cq, IntPtr tag);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_completion_queue_destroy(IntPtr cq);
+
+            // CStringSafeHandle 
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void gprsharp_free(IntPtr ptr);
+
+            // MetadataArraySafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern MetadataArraySafeHandle grpcsharp_metadata_array_create(UIntPtr capacity);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_metadata_array_add(MetadataArraySafeHandle array, string key, byte[] value, UIntPtr valueLength);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern UIntPtr grpcsharp_metadata_array_count(IntPtr metadataArray);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_metadata_array_get_key(IntPtr metadataArray, UIntPtr index);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_metadata_array_get_value(IntPtr metadataArray, UIntPtr index);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern UIntPtr grpcsharp_metadata_array_get_value_length(IntPtr metadataArray, UIntPtr index);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_metadata_array_destroy_full(IntPtr array);
+
+            // NativeLogRedirector
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_redirect_log(GprLogDelegate callback);
+
+            // NativeMetadataCredentialsPlugin
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern CallCredentialsSafeHandle grpcsharp_metadata_credentials_create_from_plugin(NativeMetadataInterceptor interceptor);
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern void grpcsharp_metadata_credentials_notify_from_plugin(IntPtr callbackPtr, IntPtr userData, MetadataArraySafeHandle metadataArray, StatusCode statusCode, string errorDetails);
+
+            // ServerCredentialsSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll", CharSet = CharSet.Ansi)]
+            public static extern ServerCredentialsSafeHandle grpcsharp_ssl_server_credentials_create(string pemRootCerts, string[] keyCertPairCertChainArray, string[] keyCertPairPrivateKeyArray, UIntPtr numKeyCertPairs, bool forceClientAuth);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_server_credentials_release(IntPtr credentials);
+
+            // ServerSafeHandle
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern ServerSafeHandle grpcsharp_server_create(CompletionQueueSafeHandle cq, ChannelArgsSafeHandle args);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern int grpcsharp_server_add_insecure_http2_port(ServerSafeHandle server, string addr);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern int grpcsharp_server_add_secure_http2_port(ServerSafeHandle server, string addr, ServerCredentialsSafeHandle creds);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_server_start(ServerSafeHandle server);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_server_request_call(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_server_cancel_all_calls(ServerSafeHandle server);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_server_shutdown_and_notify_callback(ServerSafeHandle server, CompletionQueueSafeHandle cq, BatchContextSafeHandle ctx);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern void grpcsharp_server_destroy(IntPtr server);
+
+            // Timespec
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern Timespec gprsharp_now(GPRClockType clockType);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern Timespec gprsharp_inf_future(GPRClockType clockType);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern Timespec gprsharp_inf_past(GPRClockType clockType);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern Timespec gprsharp_convert_clock_type(Timespec t, GPRClockType targetClock);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern int gprsharp_sizeof_timespec();
+
+            // Testing
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern GRPCCallError grpcsharp_test_callback([MarshalAs(UnmanagedType.FunctionPtr)] OpCompletionDelegate callback);
+
+            [DllImport("grpc_csharp_ext.dll")]
+            public static extern IntPtr grpcsharp_test_nop(IntPtr ptr);
+        }
+    }
+}