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#region Copyright notice and license
// Copyright 2015 gRPC authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#endregion
using System;
using System.Runtime.InteropServices;
using System.Threading;
using System.Threading.Tasks;
using Grpc.Core.Profiling;
namespace Grpc.Core.Internal
{
/// <summary>
/// grpc_channel from <c>grpc/grpc.h</c>
/// </summary>
internal class ChannelSafeHandle : SafeHandleZeroIsInvalid
{
static readonly NativeMethods Native = NativeMethods.Get();
private ChannelSafeHandle()
{
}
public static ChannelSafeHandle CreateInsecure(string target, ChannelArgsSafeHandle channelArgs)
{
// Increment reference count for the native gRPC environment to make sure we don't do grpc_shutdown() before destroying the server handle.
// Doing so would make object finalizer crash if we end up abandoning the handle.
GrpcEnvironment.GrpcNativeInit();
return Native.grpcsharp_insecure_channel_create(target, channelArgs);
}
public static ChannelSafeHandle CreateSecure(ChannelCredentialsSafeHandle credentials, string target, ChannelArgsSafeHandle channelArgs)
{
// Increment reference count for the native gRPC environment to make sure we don't do grpc_shutdown() before destroying the server handle.
// Doing so would make object finalizer crash if we end up abandoning the handle.
GrpcEnvironment.GrpcNativeInit();
return Native.grpcsharp_secure_channel_create(credentials, target, channelArgs);
}
public CallSafeHandle CreateCall(CallSafeHandle parentCall, ContextPropagationFlags propagationMask, CompletionQueueSafeHandle cq, string method, string host, Timespec deadline, CallCredentialsSafeHandle credentials)
{
var result = Native.grpcsharp_channel_create_call(this, parentCall, propagationMask, cq, method, host, deadline);
if (credentials != null)
{
result.SetCredentials(credentials);
}
result.Initialize(cq);
return result;
}
public ChannelState CheckConnectivityState(bool tryToConnect)
{
return Native.grpcsharp_channel_check_connectivity_state(this, tryToConnect ? 1 : 0);
}
public void WatchConnectivityState(ChannelState lastObservedState, Timespec deadline, CompletionQueueSafeHandle cq, BatchCompletionDelegate callback)
{
var ctx = BatchContextSafeHandle.Create();
cq.CompletionRegistry.RegisterBatchCompletion(ctx, callback);
Native.grpcsharp_channel_watch_connectivity_state(this, lastObservedState, deadline, cq, ctx);
}
public string GetTarget()
{
using (var cstring = Native.grpcsharp_channel_get_target(this))
{
return cstring.GetValue();
}
}
protected override bool ReleaseHandle()
{
Native.grpcsharp_channel_destroy(handle);
GrpcEnvironment.GrpcNativeShutdown();
return true;
}
}
}
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