[599] | 1 | 'Classes/System/Threading/ThreadPool.ab
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| 2 |
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| 3 | Namespace System
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| 4 | Namespace Threading
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| 5 | Namespace Detail
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| 6 |
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| 7 | TypeDef PQueueUserWorkItem = *Function(fn As LPTHREAD_START_ROUTINE, context As VoidPtr, flags As DWord) As BOOL
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| 8 |
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| 9 | TypeDef PRegisterWaitForSingleObject = *Function(ByRef hNewWaitObject As HANDLE, hObject As HANDLE, Callback As WAITORTIMERCALLBACK, Context As VoidPtr, dwMilliseconds As DWord, dwFlags As DWord) As BOOL
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| 10 |
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| 11 | Const WM_QueueUserWorkItem = WM_APP + 100
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| 12 | Const WM_RegisterWaitForSingleObject = WM_APP + 101
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| 13 |
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| 14 | Class QueueContextData<T>
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| 15 | Public
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| 16 | Callback As T
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| 17 | State As Object
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| 18 |
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| 19 | Sub QueueContextData(c As T, s As Object)
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| 20 | Callback = c
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| 21 | State = s
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| 22 | End Sub
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| 23 | End Class
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| 24 |
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| 25 | Class WaitData
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| 26 | Public
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| 27 | WaitObject As WaitHandle
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| 28 | Callback As WaitOrTimerCallback
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| 29 | State As Object
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| 30 |
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| 31 | Sub WaitData(w As WaitHandle, c As WaitOrTimerCallback, s As Object)
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| 32 | WaitObject = w
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| 33 | Callback = c
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| 34 | State = s
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| 35 | End Sub
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| 36 | End Class
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| 37 |
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| 38 | End Namespace
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| 39 |
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| 40 | Delegate Sub WaitCallback(state As Object)
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| 41 | Delegate Sub WaitOrTimerCallback(state As Object, timedOut As Boolean)
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| 42 |
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| 43 | Class ThreadPool
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| 44 | Public
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| 45 | Static Function QueueUserWorkItem(callback As WaitCallback, state = Nothing As Object) As Boolean
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| 46 | startThread()
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| 47 | Dim qcd = New Detail.QueueContextData<WaitCallback>(callback, state)
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| 48 | Dim h = ActiveBasic.AllocObjectHandle(qcd)
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| 49 | PostThreadMessage(thread.ThreadId, Detail.WM_QueueUserWorkItem, 0, h)
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| 50 | End Function
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| 51 |
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| 52 | 'とりあえずタイムアウト非対応
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| 53 | Static Function RegisterWaitForSingleObject(waitObject As WaitHandle, callback As WaitOrTimerCallback, state As Object) As RegisteredWaitHandle
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| 54 | startThread()
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| 55 | Dim wd = New Detail.WaitData(waitObject, callback, state)
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| 56 | Dim h = ActiveBasic.AllocObjectHandle(wd)
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| 57 | PostThreadMessage(thread.ThreadId, Detail.WM_RegisterWaitForSingleObject, 0, h)
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| 58 | End Function
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| 59 | /*
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| 60 | Static Function RegisterWaitForSingleObject(waitObject As WaitHandle, callback As WaitOrTimerCallback, state As Object, millisecondsTimeOutInterval As DWord, executeOnlyOnce As Boolean) As RegisteredWaitHandle
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| 61 | End Function
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| 62 | */
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| 63 | Private
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| 64 | Static Function waitCallback(param As VoidPtr) As DWord
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| 65 | Try
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| 66 | Diagnostics.Debug.Assert(param <> 0)
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| 67 | Dim qcd = ActiveBasic.ReleaseObjectHandle(param As LONG_PTR) As Detail.QueueContextData<WaitCallback>
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| 68 | With qcd
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| 69 | Diagnostics.Debug.Assert(.Callback <> 0)
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| 70 | Dim c = .Callback
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| 71 | c(.State)
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| 72 | End With
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| 73 | Catch e As Object
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| 74 | End Try
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| 75 | End Function
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| 76 |
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| 77 | Static Sub waitOrTimerCallback(param As VoidPtr, TimerOrWaitFired As BOOLEAN)
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| 78 | Try
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| 79 | Diagnostics.Debug.Assert(param <> 0)
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| 80 | Dim qcd = ActiveBasic.ReleaseObjectHandle(param As LONG_PTR) As Detail.QueueContextData<WaitOrTimerCallback>
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| 81 | With qcd
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| 82 | Diagnostics.Debug.Assert(.Callback <> 0)
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| 83 | Dim c = .Callback
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| 84 | c(.State, TimerOrWaitFired)
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| 85 | End With
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| 86 | Catch e As Object
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| 87 | End Try
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| 88 | End Sub
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| 89 |
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| 90 | Static Sub startThread()
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| 91 | If ActiveBasic.IsNothing(thread) Then
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| 92 | Dim lock = New ActiveBasic.Windows.CriticalSectionLock(_System_CriticalSection)
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| 93 | thread = New Thread(AddressOf(poolThread), 0)
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| 94 | thread.Name = "ThreadPool"
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| 95 | thread.Start()
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| 96 | While isMessageQueueCreated = False
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| 97 | Sleep(1)
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| 98 | Wend
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| 99 | lock.Dispose()
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| 100 | End If
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| 101 | End Sub
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| 102 |
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| 103 | Static Function poolThread(pv As VoidPtr) As DWord
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| 104 | Try
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| 105 | Dim msg As MSG
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[624] | 106 | PeekMessage(msg, 0, WM_USER, WM_USER, PM_NOREMOVE) 'メッセージキューの作成
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[599] | 107 | isMessageQueueCreated = True
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| 108 | Dim waitList = New Collections.Generic.List<Detail.WaitData>
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| 109 | Dim handles = waitListToArrayOfHANDLE(waitList)
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| 110 | Do
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| 111 | While PeekMessage(msg, 0, 0, 0, PM_REMOVE)
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| 112 | Select Case msg.message
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| 113 | Case WM_QUIT
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| 114 | Exit Do
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| 115 | Case Detail.WM_QueueUserWorkItem
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| 116 | waitCallback(msg.lParam As VoidPtr)
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| 117 | Case Detail.WM_RegisterWaitForSingleObject
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| 118 | Diagnostics.Debug.Assert(msg.lParam <> 0)
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| 119 | Dim wd = ActiveBasic.ReleaseObjectHandle(msg.lParam) As Detail.WaitData
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| 120 | waitList.Add(wd)
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| 121 | handles = waitListToArrayOfHANDLE(waitList)
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| 122 | End Select
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| 123 | Wend
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| 124 | Dim retWait = MsgWaitForMultipleObjects(waitList.Count As DWord, handles, FALSE, INFINITE, QS_ALLINPUT)
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| 125 | If retWait = &hffffffff Then
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| 126 | poolThread = retWait
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| 127 | Exit Do
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| 128 | ElseIf WAIT_OBJECT_0 <= retWait And retWait < WAIT_OBJECT_0 + waitList.Count Then
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| 129 | Dim i = retWait - WAIT_OBJECT_0
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| 130 | Dim wd = waitList[i]
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| 131 | With wd
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| 132 | Dim c = wd.Callback
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| 133 | c(wd.State, False)
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| 134 | End With
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| 135 | waitList.RemoveAt(i)
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[624] | 136 | handles = waitListToArrayOfHANDLE(waitList)
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[599] | 137 | End If
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| 138 | Loop
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| 139 | Catch e As Object
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| 140 | Diagnostics.Trace.WriteLine("ThreadPool thread catches an exception:")
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| 141 | Diagnostics.Trace.WriteLine(e.ToString)
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| 142 | End Try
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| 143 | End Function
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| 144 |
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| 145 | Static Function waitListToArrayOfHANDLE(waitList As Collections.Generic.List<Detail.WaitData>) As *HANDLE
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| 146 | Diagnostics.Debug.Assert(Not ActiveBasic.IsNothing(waitList))
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| 147 | waitListToArrayOfHANDLE = GC_malloc(waitList.Count * SizeOf(HANDLE))
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| 148 | Dim count = waitList.Count
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| 149 | Dim i As Long
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| 150 | For i = 0 To ELM(count)
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| 151 | waitListToArrayOfHANDLE[i] = waitList.Item[i].WaitObject.Handle
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| 152 | Next
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| 153 | End Function
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| 154 |
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| 155 | Static thread = Nothing As Thread
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| 156 | Static isMessageQueueCreated = False As Boolean
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| 157 | End Class
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| 158 |
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| 159 | Class RegisteredWaitHandle
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| 160 | End Class
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| 161 | #ifdef __UNDEFINED__
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| 162 | Class ThreadPool
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| 163 | Public
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| 164 | Static Function QueueUserWorkItem(callback As WaitCallback, state = Nothing As Object) As Boolean
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| 165 | Dim pfn = GetProcAddress(GetModuleHandle("kernel32"), ToMBStr("QueueUserWorkItem")) As Detail.PQueueUserWorkItem
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| 166 | If pfn = 0 Then
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| 167 | 'ToDo: 自前実装
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| 168 | Throw New NotSupportedException("RegisterWaitForSingleObject requires Windows 2000")
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| 169 | End If
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| 170 | Dim qcd = New Detail.QueueContextData<WaitCallback>(callback, state)
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| 171 | Dim h = ActiveBasic.AllocObjectHandle(qcd)
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| 172 | pfn(AddressOf (waitCallback), h As VoidPtr, WT_EXECUTELONGFUNCTION)
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| 173 | End Function
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| 174 |
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| 175 | Static Function RegisterWaitForSingleObject(waitObject As WaitHandle, callback As WaitOrTimerCallback, state As Object, millisecondsTimeOutInterval As DWord, executeOnlyOnce As Boolean) As RegisteredWaitHandle
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| 176 | Dim pfn = GetProcAddress(GetModuleHandle("kernel32"), ToMBStr("RegisterWaitForSingleObject")) As Detail.PRegisterWaitForSingleObject
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| 177 | If pfn = 0 Then
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| 178 | 'ToDo: 自前実装
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| 179 | Throw New NotSupportedException("RegisterWaitForSingleObject requires Windows 2000")
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| 180 | End If
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| 181 | Dim qcd = New Detail.QueueContextData<WaitOrTimerCallback>(callback, state)
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| 182 | Dim h = ActiveBasic.AllocObjectHandle(qcd)
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| 183 | Dim wo As HANDLE
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| 184 | pfn(wo, waitObject.Handle, 0, 0 As VoidPtr, 0, WT_EXECUTELONGFUNCTION)
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| 185 | ' pfn(wo, waitObject.Handle, AddressOf (waitOrTimerCallback), h As VoidPtr, millisecondsTimeOutInterval, WT_EXECUTELONGFUNCTION)
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| 186 | End Function
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| 187 |
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| 188 | Private
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| 189 | Static Function waitCallback(param As VoidPtr) As DWord
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| 190 | Try
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| 191 | Diagnostics.Debug.Assert(param <> 0)
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| 192 | Dim qcd = ActiveBasic.ReleaseObjectHandle(param As LONG_PTR) As Detail.QueueContextData<WaitCallback>
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| 193 | With qcd
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| 194 | Diagnostics.Debug.Assert(.Callback <> 0)
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| 195 | Dim c = .Callback
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| 196 | c(.State)
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| 197 | End With
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| 198 | Catch e As Object
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| 199 | End Try
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| 200 | End Function
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| 201 |
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| 202 | Static Sub waitOrTimerCallback(param As VoidPtr, TimerOrWaitFired As BOOLEAN)
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| 203 | Try
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| 204 | Diagnostics.Debug.Assert(param <> 0)
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| 205 | Dim qcd = ActiveBasic.ReleaseObjectHandle(param As LONG_PTR) As Detail.QueueContextData<WaitOrTimerCallback>
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| 206 | With qcd
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| 207 | Diagnostics.Debug.Assert(.Callback <> 0)
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| 208 | Dim c = .Callback
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| 209 | c(.State, TimerOrWaitFired)
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| 210 | End With
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| 211 | Catch e As Object
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| 212 | End Try
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| 213 | End Sub
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| 214 | End Class
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| 215 |
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| 216 | Class RegisteredWaitHandle
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| 217 | End Class
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| 218 |
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| 219 | #endif
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| 220 |
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| 221 | End Namespace
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| 222 | End Namespace
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