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

#region Copyright notice and license

// Copyright 2015, 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
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#endregion

using System;
using System.Runtime.InteropServices;
using Grpc.Core;

namespace Grpc.Core.Internal
{
    /// <summary>
    /// grpcsharp_request_call_context
    /// </summary>
    internal class RequestCallContextSafeHandle : SafeHandleZeroIsInvalid
    {
        static readonly NativeMethods Native = NativeMethods.Get();

        private RequestCallContextSafeHandle()
        {
        }

        public static RequestCallContextSafeHandle Create()
        {
            return Native.grpcsharp_request_call_context_create();
        }

        public IntPtr Handle
        {
            get
            {
                return handle;
            }
        }

        // Gets data of server_rpc_new completion.
        public ServerRpcNew GetServerRpcNew(Server server)
        {
            var call = Native.grpcsharp_request_call_context_call(this);

            var method = Marshal.PtrToStringAnsi(Native.grpcsharp_request_call_context_method(this));
            var host = Marshal.PtrToStringAnsi(Native.grpcsharp_request_call_context_host(this));
            var deadline = Native.grpcsharp_request_call_context_deadline(this);

            IntPtr metadataArrayPtr = Native.grpcsharp_request_call_context_request_metadata(this);
            var metadata = MetadataArraySafeHandle.ReadMetadataFromPtrUnsafe(metadataArrayPtr);

            return new ServerRpcNew(server, call, method, host, deadline, metadata);
        }

        protected override bool ReleaseHandle()
        {
            Native.grpcsharp_request_call_context_destroy(handle);
            return true;
        }
    }
}