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
|
#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 Google.GRPC.Core.Internal;
using System.Runtime.InteropServices;
namespace Google.GRPC.Core
{
/// <summary>
/// Encapsulates initialization and shutdown of GRPC C core library.
/// You should not need to initialize it manually, as static constructors
/// should load the library when needed.
/// </summary>
public static class GrpcEnvironment
{
const int THREAD_POOL_SIZE = 1;
[DllImport("grpc_csharp_ext.dll")]
static extern void grpcsharp_init();
[DllImport("grpc_csharp_ext.dll")]
static extern void grpcsharp_shutdown();
static object staticLock = new object();
static bool initCalled = false;
static bool shutdownCalled = false;
static GrpcThreadPool threadPool = new GrpcThreadPool(THREAD_POOL_SIZE);
/// <summary>
/// Makes sure GRPC environment is initialized.
/// </summary>
public static void EnsureInitialized() {
lock(staticLock)
{
if (!initCalled)
{
initCalled = true;
GrpcInit();
}
}
}
/// <summary>
/// Shuts down the GRPC environment if it was initialized before.
/// Repeated invocations have no effect.
/// </summary>
public static void Shutdown()
{
lock(staticLock)
{
if (initCalled && !shutdownCalled)
{
shutdownCalled = true;
GrpcShutdown();
}
}
}
/// <summary>
/// Initializes GRPC C Core library.
/// </summary>
private static void GrpcInit()
{
grpcsharp_init();
threadPool.Start();
// TODO: use proper logging here
Console.WriteLine("GRPC initialized.");
}
/// <summary>
/// Shutdown GRPC C Core library.
/// </summary>
private static void GrpcShutdown()
{
threadPool.Stop();
grpcsharp_shutdown();
// TODO: use proper logging here
Console.WriteLine("GRPC shutdown.");
}
internal static GrpcThreadPool ThreadPool
{
get
{
return threadPool;
}
}
}
}
|
