diff options
Diffstat (limited to 'ThirdParty/SmartThreadPool/CallerThreadContext.cs')
-rw-r--r-- | ThirdParty/SmartThreadPool/CallerThreadContext.cs | 138 |
1 files changed, 138 insertions, 0 deletions
diff --git a/ThirdParty/SmartThreadPool/CallerThreadContext.cs b/ThirdParty/SmartThreadPool/CallerThreadContext.cs new file mode 100644 index 0000000..925c39b --- /dev/null +++ b/ThirdParty/SmartThreadPool/CallerThreadContext.cs | |||
@@ -0,0 +1,138 @@ | |||
1 | |||
2 | #if !(_WINDOWS_CE) && !(_SILVERLIGHT) && !(WINDOWS_PHONE) | ||
3 | |||
4 | using System; | ||
5 | using System.Diagnostics; | ||
6 | using System.Threading; | ||
7 | using System.Reflection; | ||
8 | using System.Web; | ||
9 | using System.Runtime.Remoting.Messaging; | ||
10 | |||
11 | |||
12 | namespace Amib.Threading.Internal | ||
13 | { | ||
14 | #region CallerThreadContext class | ||
15 | |||
16 | /// <summary> | ||
17 | /// This class stores the caller call context in order to restore | ||
18 | /// it when the work item is executed in the thread pool environment. | ||
19 | /// </summary> | ||
20 | internal class CallerThreadContext | ||
21 | { | ||
22 | #region Prepare reflection information | ||
23 | |||
24 | // Cached type information. | ||
25 | private static readonly MethodInfo getLogicalCallContextMethodInfo = | ||
26 | typeof(Thread).GetMethod("GetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic); | ||
27 | |||
28 | private static readonly MethodInfo setLogicalCallContextMethodInfo = | ||
29 | typeof(Thread).GetMethod("SetLogicalCallContext", BindingFlags.Instance | BindingFlags.NonPublic); | ||
30 | |||
31 | private static string HttpContextSlotName = GetHttpContextSlotName(); | ||
32 | |||
33 | private static string GetHttpContextSlotName() | ||
34 | { | ||
35 | FieldInfo fi = typeof(HttpContext).GetField("CallContextSlotName", BindingFlags.Static | BindingFlags.NonPublic); | ||
36 | |||
37 | if (fi != null) | ||
38 | { | ||
39 | return (string) fi.GetValue(null); | ||
40 | } | ||
41 | |||
42 | return "HttpContext"; | ||
43 | } | ||
44 | |||
45 | #endregion | ||
46 | |||
47 | #region Private fields | ||
48 | |||
49 | private HttpContext _httpContext; | ||
50 | private LogicalCallContext _callContext; | ||
51 | |||
52 | #endregion | ||
53 | |||
54 | /// <summary> | ||
55 | /// Constructor | ||
56 | /// </summary> | ||
57 | private CallerThreadContext() | ||
58 | { | ||
59 | } | ||
60 | |||
61 | public bool CapturedCallContext | ||
62 | { | ||
63 | get | ||
64 | { | ||
65 | return (null != _callContext); | ||
66 | } | ||
67 | } | ||
68 | |||
69 | public bool CapturedHttpContext | ||
70 | { | ||
71 | get | ||
72 | { | ||
73 | return (null != _httpContext); | ||
74 | } | ||
75 | } | ||
76 | |||
77 | /// <summary> | ||
78 | /// Captures the current thread context | ||
79 | /// </summary> | ||
80 | /// <returns></returns> | ||
81 | public static CallerThreadContext Capture( | ||
82 | bool captureCallContext, | ||
83 | bool captureHttpContext) | ||
84 | { | ||
85 | Debug.Assert(captureCallContext || captureHttpContext); | ||
86 | |||
87 | CallerThreadContext callerThreadContext = new CallerThreadContext(); | ||
88 | |||
89 | // TODO: In NET 2.0, redo using the new feature of ExecutionContext class - Capture() | ||
90 | // Capture Call Context | ||
91 | if(captureCallContext && (getLogicalCallContextMethodInfo != null)) | ||
92 | { | ||
93 | callerThreadContext._callContext = (LogicalCallContext)getLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, null); | ||
94 | if (callerThreadContext._callContext != null) | ||
95 | { | ||
96 | callerThreadContext._callContext = (LogicalCallContext)callerThreadContext._callContext.Clone(); | ||
97 | } | ||
98 | } | ||
99 | |||
100 | // Capture httpContext | ||
101 | if (captureHttpContext && (null != HttpContext.Current)) | ||
102 | { | ||
103 | callerThreadContext._httpContext = HttpContext.Current; | ||
104 | } | ||
105 | |||
106 | return callerThreadContext; | ||
107 | } | ||
108 | |||
109 | /// <summary> | ||
110 | /// Applies the thread context stored earlier | ||
111 | /// </summary> | ||
112 | /// <param name="callerThreadContext"></param> | ||
113 | public static void Apply(CallerThreadContext callerThreadContext) | ||
114 | { | ||
115 | if (null == callerThreadContext) | ||
116 | { | ||
117 | throw new ArgumentNullException("callerThreadContext"); | ||
118 | } | ||
119 | |||
120 | // Todo: In NET 2.0, redo using the new feature of ExecutionContext class - Run() | ||
121 | // Restore call context | ||
122 | if ((callerThreadContext._callContext != null) && (setLogicalCallContextMethodInfo != null)) | ||
123 | { | ||
124 | setLogicalCallContextMethodInfo.Invoke(Thread.CurrentThread, new object[] { callerThreadContext._callContext }); | ||
125 | } | ||
126 | |||
127 | // Restore HttpContext | ||
128 | if (callerThreadContext._httpContext != null) | ||
129 | { | ||
130 | HttpContext.Current = callerThreadContext._httpContext; | ||
131 | //CallContext.SetData(HttpContextSlotName, callerThreadContext._httpContext); | ||
132 | } | ||
133 | } | ||
134 | } | ||
135 | |||
136 | #endregion | ||
137 | } | ||
138 | #endif | ||