83 lines
2.8 KiB
C#
83 lines
2.8 KiB
C#
|
using System.Threading;
|
||
|
|
|
||
|
|
#if (_WINDOWS_CE)
|
||
|
|
using System;
|
||
|
|
using System.Runtime.InteropServices;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
namespace Amib.Threading.Internal
|
||
|
|
{
|
||
|
|
/// <summary>
|
||
|
|
/// EventWaitHandleFactory class.
|
||
|
|
/// This is a static class that creates AutoResetEvent and ManualResetEvent objects.
|
||
|
|
/// In WindowCE the WaitForMultipleObjects API fails to use the Handle property
|
||
|
|
/// of XxxResetEvent. It can use only handles that were created by the CreateEvent API.
|
||
|
|
/// Consequently this class creates the needed XxxResetEvent and replaces the handle if
|
||
|
|
/// it's a WindowsCE OS.
|
||
|
|
/// </summary>
|
||
|
|
public static class EventWaitHandleFactory
|
||
|
|
{
|
||
|
|
/// <summary>
|
||
|
|
/// Create a new AutoResetEvent object
|
||
|
|
/// </summary>
|
||
|
|
/// <returns>Return a new AutoResetEvent object</returns>
|
||
|
|
public static AutoResetEvent CreateAutoResetEvent()
|
||
|
|
{
|
||
|
|
AutoResetEvent waitHandle = new AutoResetEvent(false);
|
||
|
|
|
||
|
|
#if (_WINDOWS_CE)
|
||
|
|
ReplaceEventHandle(waitHandle, false, false);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return waitHandle;
|
||
|
|
}
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Create a new ManualResetEvent object
|
||
|
|
/// </summary>
|
||
|
|
/// <returns>Return a new ManualResetEvent object</returns>
|
||
|
|
public static ManualResetEvent CreateManualResetEvent(bool initialState)
|
||
|
|
{
|
||
|
|
ManualResetEvent waitHandle = new ManualResetEvent(initialState);
|
||
|
|
|
||
|
|
#if (_WINDOWS_CE)
|
||
|
|
ReplaceEventHandle(waitHandle, true, initialState);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
return waitHandle;
|
||
|
|
}
|
||
|
|
|
||
|
|
#if (_WINDOWS_CE)
|
||
|
|
|
||
|
|
/// <summary>
|
||
|
|
/// Replace the event handle
|
||
|
|
/// </summary>
|
||
|
|
/// <param name="waitHandle">The WaitHandle object which its handle needs to be replaced.</param>
|
||
|
|
/// <param name="manualReset">Indicates if the event is a ManualResetEvent (true) or an AutoResetEvent (false)</param>
|
||
|
|
/// <param name="initialState">The initial state of the event</param>
|
||
|
|
private static void ReplaceEventHandle(WaitHandle waitHandle, bool manualReset, bool initialState)
|
||
|
|
{
|
||
|
|
// Store the old handle
|
||
|
|
IntPtr oldHandle = waitHandle.Handle;
|
||
|
|
|
||
|
|
// Create a new event
|
||
|
|
IntPtr newHandle = CreateEvent(IntPtr.Zero, manualReset, initialState, null);
|
||
|
|
|
||
|
|
// Replace the old event with the new event
|
||
|
|
waitHandle.Handle = newHandle;
|
||
|
|
|
||
|
|
// Close the old event
|
||
|
|
CloseHandle (oldHandle);
|
||
|
|
}
|
||
|
|
|
||
|
|
[DllImport("coredll.dll", SetLastError = true)]
|
||
|
|
public static extern IntPtr CreateEvent(IntPtr lpEventAttributes, bool bManualReset, bool bInitialState, string lpName);
|
||
|
|
|
||
|
|
//Handle
|
||
|
|
[DllImport("coredll.dll", SetLastError = true)]
|
||
|
|
public static extern bool CloseHandle(IntPtr hObject);
|
||
|
|
#endif
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|