1 | ' Classes/System/Threading/WaitHandle.ab
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2 |
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3 | #ifndef __SYSTEM_THREADING_WAITHANDLE_AB__
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4 | #define __SYSTEM_THREADING_WAITHANDLE_AB__
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5 |
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6 | #require <Classes/System/misc.ab>
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7 |
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8 | Namespace System
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9 | Namespace Threading
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10 |
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11 | Namespace Detail
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12 | TypeDef PFNSignalObjectAndWait = *Function(hObjectToSignal As HANDLE, hObjectToWaitOn As HANDLE, dwMilliseconds As DWord, bAlertable As DWord) As DWord
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13 | End Namespace
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14 |
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15 | Class WaitHandle
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16 | Implements System.IDisposable
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17 | Public
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18 | ' Properties
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19 | ' Const Function SafeWaitHandle() As SafeWaitHandle
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20 | ' Sub SafeWaitHandle(h As SafeWaitHandle)
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21 |
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22 | Const Virtual Function Handle() As HANDLE
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23 | Return h
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24 | End Function
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25 |
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26 | Virtual Sub Handle(newHandle As HANDLE)
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27 | h = newHandle
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28 | End Sub
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29 |
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30 | ' Methods
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31 |
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32 | Virtual Sub ~WaitHandle()
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33 | Dispose()
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34 | End Sub
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35 |
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36 | Virtual Sub Close()
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37 | Dispose()
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38 | End Sub
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39 |
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40 | Override Sub Dispose()
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41 | Dim hDisposing = InterlockedExchangePointer(h, 0)
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42 | If hDisposing <> 0 Then
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43 | CloseHandle(hDisposing)
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44 | End If
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45 | End Sub
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46 |
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47 | Function WaitOne() As Boolean
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48 | Return WaitOne(INFINITE, FALSE)
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49 | End Function
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50 |
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51 | Function WaitOne(millisecondsTimeout As Long, exitContext As BOOL) As Boolean
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52 | Return WaitHandle.AfterWait(WaitForSingleObject(h, millisecondsTimeout As DWord), 1)
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53 | End Function
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54 |
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55 | ' Function WaitOne(timeout As TimeSpan, exitContext As BOOL) As BOOL
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56 | /*
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57 | Static Function WaitAll(count As DWord, handles As *HANDLE) As BOOL
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58 | Return WaitAll(count, handles, INFINITE, FALSE)
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59 | End Function
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60 |
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61 | Static Function WaitAll(count As DWord, handles As *HANDLE, millisecondsTimeout As Long, exitContext As BOOL) As BOOL
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62 | Return WaitHandle.AfterWait(WaitForMultipleObjects(count, handles, TRUE, millisecondsTimeout), count)
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63 | End Function
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64 |
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65 | ' Static Function WaitAll(timeout As TimeSpan, handles As *HANDLE, millisecondsTimeout As Long, exitContext As BOOL) As BOOL
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66 |
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67 | Static Function WaitAny(count As DWord, handles As *HANDLE) As BOOL
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68 | Return WaitAny(count, handles, INFINITE, FALSE)
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69 | End Function
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70 |
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71 | Static Function WaitAny(count As DWord, handles As *HANDLE, millisecondsTimeout As Long, exitContext As BOOL) As BOOL
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72 | Return WaitHandle.AfterWait(WaitForMultipleObjects(count, handles, FALSE, millisecondsTimeout), count)
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73 | End Function
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74 |
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75 | ' Static Function WaitAny(timeout As TimeSpan, handles As *HANDLE, millisecondsTimeout As Long, exitContext As BOOL) As BOOL
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76 | */
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77 | Static Function SignalAndWait(toSignal As WaitHandle, toWaitOn As WaitHandle) As Boolean
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78 | Return SignalAndWait(toSignal, toWaitOn, INFINITE, FALSE)
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79 | End Function
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80 |
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81 | Public
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82 | Static Function SignalAndWait(toSignal As WaitHandle, toWaitOn As WaitHandle, millisecondsTimeout As Long, exitContext As BOOL) As Boolean
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83 | Dim pSignalObjectAndWait = GetProcAddress(GetModuleHandle("Kernel32.dll"), "SignalObjectAndWait") As Detail.PFNSignalObjectAndWait
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84 | If pSignalObjectAndWait = 0 Then
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85 | ' PlatformNotSupportedException
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86 | Debug
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87 | ExitThread(-1)
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88 | End If
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89 | Return WaitHandle.AfterWait(pSignalObjectAndWait(toSignal.Handle, toWaitOn.Handle, millisecondsTimeout As DWord, FALSE), 1)
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90 | End Function
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91 |
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92 | ' Static Function SignalAndWait(ByRef toSignal As WaitHandle, ByRef toWaitOn As WaitHandle, timeout As TimeSpan, exitContext As BOOL) As BOOL
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93 |
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94 | ' Protected
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95 | Sub WaitHandle()
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96 | End Sub
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97 |
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98 | Protected
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99 | Static Const InvalidHandle = INVALID_HANDLE_VALUE As HANDLE
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100 |
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101 | Private
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102 | h As HANDLE
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103 |
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104 | Static Function AfterWait(ret As DWord, n As DWord) As Boolean
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105 | Select Case ret
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106 | Case WAIT_TIMEOUT
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107 | Return False
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108 | Case WAIT_ABANDONED
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109 | ' Throw AbandonedMutexException
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110 | Debug
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111 | ExitThread(0)
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112 | 'Case WAIT_FAILED
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113 | Case Else
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114 | If WAIT_OBJECT_0 <= ret And ret < WAIT_OBJECT_0 + n Then
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115 | Return True
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116 | End If
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117 | ' ObjectDisposedException?
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118 | Debug
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119 | ExitThread(0)
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120 | End Select
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121 | End Function
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122 | End Class
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123 |
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124 | End Namespace 'Threading
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125 | End Namespace 'System
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126 |
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127 | #endif '__SYSTEM_THREADING_WAITHANDLE_AB__
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