1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
#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
// 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.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)
{
using (Profilers.ForCurrentThread().NewScope("ChannelSafeHandle.CreateCall"))
{
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;
}
}
}
|
