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
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
#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.Tasks;
using Grpc.Core.Internal;
using Grpc.Core.Logging;
using Grpc.Core.Utils;
namespace Grpc.Core
{
/// <summary>
/// Encapsulates initialization and shutdown of gRPC library.
/// </summary>
public class GrpcEnvironment
{
const int THREAD_POOL_SIZE = 4;
[DllImport("grpc_csharp_ext.dll")]
static extern void grpcsharp_init();
[DllImport("grpc_csharp_ext.dll")]
static extern void grpcsharp_shutdown();
[DllImport("grpc_csharp_ext.dll")]
static extern IntPtr grpcsharp_version_string(); // returns not-owned const char*
static object staticLock = new object();
static GrpcEnvironment instance;
static ILogger logger = new ConsoleLogger();
readonly GrpcThreadPool threadPool;
readonly CompletionRegistry completionRegistry;
readonly DebugStats debugStats = new DebugStats();
bool isClosed;
/// <summary>
/// Returns an instance of initialized gRPC environment.
/// Subsequent invocations return the same instance unless Shutdown has been called first.
/// </summary>
internal static GrpcEnvironment GetInstance()
{
lock (staticLock)
{
if (instance == null)
{
instance = new GrpcEnvironment();
}
return instance;
}
}
/// <summary>
/// Shuts down the gRPC environment if it was initialized before.
/// Blocks until the environment has been fully shutdown.
/// </summary>
public static void Shutdown()
{
lock (staticLock)
{
if (instance != null)
{
instance.Close();
instance = null;
}
}
}
/// <summary>
/// Gets application-wide logger used by gRPC.
/// </summary>
/// <value>The logger.</value>
public static ILogger Logger
{
get
{
return logger;
}
}
/// <summary>
/// Sets the application-wide logger that should be used by gRPC.
/// </summary>
public static void SetLogger(ILogger customLogger)
{
Preconditions.CheckNotNull(customLogger);
logger = customLogger;
}
/// <summary>
/// Creates gRPC environment.
/// </summary>
private GrpcEnvironment()
{
NativeLogRedirector.Redirect();
grpcsharp_init();
completionRegistry = new CompletionRegistry(this);
threadPool = new GrpcThreadPool(this, THREAD_POOL_SIZE);
threadPool.Start();
// TODO: use proper logging here
Logger.Info("gRPC initialized.");
}
/// <summary>
/// Gets the completion registry used by this gRPC environment.
/// </summary>
internal CompletionRegistry CompletionRegistry
{
get
{
return this.completionRegistry;
}
}
/// <summary>
/// Gets the completion queue used by this gRPC environment.
/// </summary>
internal CompletionQueueSafeHandle CompletionQueue
{
get
{
return this.threadPool.CompletionQueue;
}
}
/// <summary>
/// Gets the completion queue used by this gRPC environment.
/// </summary>
internal DebugStats DebugStats
{
get
{
return this.debugStats;
}
}
/// <summary>
/// Gets version of gRPC C core.
/// </summary>
internal static string GetCoreVersionString()
{
var ptr = grpcsharp_version_string(); // the pointer is not owned
return Marshal.PtrToStringAnsi(ptr);
}
/// <summary>
/// Shuts down this environment.
/// </summary>
private void Close()
{
if (isClosed)
{
throw new InvalidOperationException("Close has already been called");
}
threadPool.Stop();
grpcsharp_shutdown();
isClosed = true;
debugStats.CheckOK();
Logger.Info("gRPC shutdown.");
}
/// <summary>
/// Shuts down this environment asynchronously.
/// </summary>
private Task CloseAsync()
{
return Task.Run(() =>
{
try
{
Close();
}
catch (Exception e)
{
Logger.Error(e, "Error occured while shutting down GrpcEnvironment.");
}
});
}
}
}
|
