ChannelSafeHandle.cs

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#endregion
using System;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;

namespace Grpc.Core.Internal
{
    /// <summary>
    /// grpc_channel from <grpc/grpc.h>
    /// </summary>
    internal class ChannelSafeHandle : SafeHandleZeroIsInvalid
    {
        [DllImport("grpc_csharp_ext.dll")]
        static extern ChannelSafeHandle grpcsharp_channel_create(string target, ChannelArgsSafeHandle channelArgs);

        [DllImport("grpc_csharp_ext.dll")]
        static extern ChannelSafeHandle grpcsharp_secure_channel_create(CredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs);

        [DllImport("grpc_csharp_ext.dll")]
        static extern void grpcsharp_channel_destroy(IntPtr channel);

        private ChannelSafeHandle()
        {
        }

        public static ChannelSafeHandle Create(string target, ChannelArgsSafeHandle channelArgs)
        {
            return grpcsharp_channel_create(target, channelArgs);
        }

        public static ChannelSafeHandle CreateSecure(CredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs)
        {
            return grpcsharp_secure_channel_create(credentials, target, channelArgs);
        }

        protected override bool ReleaseHandle()
        {
            grpcsharp_channel_destroy(handle);
            return true;
        }
    }
}