This repository was archived by the owner on Jul 22, 2023. It is now read-only.
forked from pythonnet/pythonnet
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathLibraryLoader.cs
More file actions
208 lines (172 loc) · 6.4 KB
/
LibraryLoader.cs
File metadata and controls
208 lines (172 loc) · 6.4 KB
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
using System;
using System.ComponentModel;
using System.Runtime.InteropServices;
namespace Python.Runtime.Platform
{
interface ILibraryLoader
{
IntPtr Load(string dllToLoad);
IntPtr GetFunction(IntPtr hModule, string procedureName);
void Free(IntPtr hModule);
}
static class LibraryLoader
{
public static ILibraryLoader Get(OperatingSystemType os)
{
switch (os)
{
case OperatingSystemType.Windows:
return new WindowsLoader();
case OperatingSystemType.Darwin:
return new DarwinLoader();
case OperatingSystemType.Linux:
return new LinuxLoader();
default:
throw new PlatformNotSupportedException($"This operating system ({os}) is not supported");
}
}
}
class LinuxLoader : ILibraryLoader
{
private static int RTLD_NOW = 0x2;
private static int RTLD_GLOBAL = 0x100;
private static IntPtr RTLD_DEFAULT = IntPtr.Zero;
private const string NativeDll = "libdl.so";
public IntPtr Load(string dllToLoad)
{
var filename = $"lib{dllToLoad}.so";
ClearError();
var res = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (res == IntPtr.Zero)
{
var err = GetError();
throw new DllNotFoundException($"Could not load {filename} with flags RTLD_NOW | RTLD_GLOBAL: {err}");
}
return res;
}
public void Free(IntPtr handle)
{
dlclose(handle);
}
public IntPtr GetFunction(IntPtr dllHandle, string name)
{
// look in the exe if dllHandle is NULL
if (dllHandle == IntPtr.Zero)
{
dllHandle = RTLD_DEFAULT;
}
ClearError();
IntPtr res = dlsym(dllHandle, name);
if (res == IntPtr.Zero)
{
var err = GetError();
throw new MissingMethodException($"Failed to load symbol {name}: {err}");
}
return res;
}
void ClearError()
{
dlerror();
}
string GetError()
{
var res = dlerror();
if (res != IntPtr.Zero)
return Marshal.PtrToStringAnsi(res);
else
return null;
}
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
public static extern IntPtr dlopen(string fileName, int flags);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
private static extern IntPtr dlsym(IntPtr handle, string symbol);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
private static extern int dlclose(IntPtr handle);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr dlerror();
}
class DarwinLoader : ILibraryLoader
{
private static int RTLD_NOW = 0x2;
private static int RTLD_GLOBAL = 0x8;
private const string NativeDll = "/usr/lib/libSystem.dylib";
private static IntPtr RTLD_DEFAULT = new IntPtr(-2);
public IntPtr Load(string dllToLoad)
{
var filename = $"lib{dllToLoad}.dylib";
ClearError();
var res = dlopen(filename, RTLD_NOW | RTLD_GLOBAL);
if (res == IntPtr.Zero)
{
var err = GetError();
throw new DllNotFoundException($"Could not load {filename} with flags RTLD_NOW | RTLD_GLOBAL: {err}");
}
return res;
}
public void Free(IntPtr handle)
{
dlclose(handle);
}
public IntPtr GetFunction(IntPtr dllHandle, string name)
{
// look in the exe if dllHandle is NULL
if (dllHandle == IntPtr.Zero)
{
dllHandle = RTLD_DEFAULT;
}
ClearError();
IntPtr res = dlsym(dllHandle, name);
if (res == IntPtr.Zero)
{
var err = GetError();
throw new MissingMethodException($"Failed to load symbol {name}: {err}");
}
return res;
}
void ClearError()
{
dlerror();
}
string GetError()
{
var res = dlerror();
if (res != IntPtr.Zero)
return Marshal.PtrToStringAnsi(res);
else
return null;
}
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
public static extern IntPtr dlopen(String fileName, int flags);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
private static extern IntPtr dlsym(IntPtr handle, String symbol);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
private static extern int dlclose(IntPtr handle);
[DllImport(NativeDll, CallingConvention = CallingConvention.Cdecl)]
private static extern IntPtr dlerror();
}
class WindowsLoader : ILibraryLoader
{
private const string NativeDll = "kernel32.dll";
public IntPtr Load(string dllToLoad)
{
var res = WindowsLoader.LoadLibrary(dllToLoad);
if (res == IntPtr.Zero)
throw new DllNotFoundException($"Could not load {dllToLoad}", new Win32Exception());
return res;
}
public IntPtr GetFunction(IntPtr hModule, string procedureName)
{
var res = WindowsLoader.GetProcAddress(hModule, procedureName);
if (res == IntPtr.Zero)
throw new MissingMethodException($"Failed to load symbol {procedureName}", new Win32Exception());
return res;
}
public void Free(IntPtr hModule) => WindowsLoader.FreeLibrary(hModule);
[DllImport(NativeDll, SetLastError = true)]
static extern IntPtr LoadLibrary(string dllToLoad);
[DllImport(NativeDll, SetLastError = true)]
static extern IntPtr GetProcAddress(IntPtr hModule, string procedureName);
[DllImport(NativeDll)]
static extern bool FreeLibrary(IntPtr hModule);
}
}