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First changeset to make internal message loop non-global.

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soukoku
2014-05-24 18:39:07 -04:00
parent f69698f90a
commit 61b0e89313
11 changed files with 170 additions and 107 deletions
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136
NTwain/TwainSession.cs
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@@ -17,7 +17,7 @@ namespace NTwain
/// <summary>
/// Basic class for interfacing with TWAIN. You should only have one of this per application process.
/// </summary>
public class TwainSession : ITwainSessionInternal
public class TwainSession : ITwainSessionInternal, IWinMessageFilter
{
/// <summary>
/// Initializes a new instance of the <see cref="TwainSession"/> class.
@@ -42,13 +42,14 @@ namespace NTwain
((ITwainSessionInternal)this).ChangeState(1, false);
EnforceState = true;
MessageLoop.Instance.EnsureStarted(HandleWndProcMessage);
_selfMsgLoop = new MessageLoop();
}
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Performance", "CA1823:AvoidUnusedPrivateFields")]
object _callbackObj; // kept around so it doesn't get gc'ed
TWIdentity _appId;
TWUserInterface _twui;
static readonly Dictionary<string, TwainSource> __ownedSources = new Dictionary<string, TwainSource>();
@@ -62,8 +63,6 @@ namespace NTwain
return __ownedSources[key] = new TwainSource(session, sourceId);
}
/// <summary>
/// Gets or sets the optional synchronization context.
/// This allows events to be raised on the thread
@@ -77,6 +76,9 @@ namespace NTwain
#region ITwainSessionInternal Members
MessageLoop _selfMsgLoop;
MessageLoop ITwainSessionInternal.SelfMessageLoop { get { return _selfMsgLoop; } }
/// <summary>
/// Gets the app id used for the session.
/// </summary>
@@ -126,6 +128,46 @@ namespace NTwain
SafeSyncableRaiseOnEvent(OnTransferReady, TransferReady, e);
}
DGAudio _dgAudio;
DGAudio ITwainSessionInternal.DGAudio
{
get
{
if (_dgAudio == null) { _dgAudio = new DGAudio(this); }
return _dgAudio;
}
}
DGControl _dgControl;
DGControl ITwainSessionInternal.DGControl
{
get
{
if (_dgControl == null) { _dgControl = new DGControl(this); }
return _dgControl;
}
}
DGImage _dgImage;
DGImage ITwainSessionInternal.DGImage
{
get
{
if (_dgImage == null) { _dgImage = new DGImage(this); }
return _dgImage;
}
}
DGCustom _dgCustom;
DGCustom ITwainSessionInternal.DGCustom
{
get
{
if (_dgCustom == null) { _dgCustom = new DGCustom(this); }
return _dgCustom;
}
}
#endregion
#region ITwainSession Members
@@ -202,53 +244,6 @@ namespace NTwain
}
}
#endregion
#region ITwainOperation Members
DGAudio _dgAudio;
/// <summary>
/// Gets the triplet operations defined for audio data group.
/// </summary>
DGAudio ITwainSessionInternal.DGAudio
{
get
{
if (_dgAudio == null) { _dgAudio = new DGAudio(this); }
return _dgAudio;
}
}
DGControl _dgControl;
DGControl ITwainSessionInternal.DGControl
{
get
{
if (_dgControl == null) { _dgControl = new DGControl(this); }
return _dgControl;
}
}
DGImage _dgImage;
DGImage ITwainSessionInternal.DGImage
{
get
{
if (_dgImage == null) { _dgImage = new DGImage(this); }
return _dgImage;
}
}
DGCustom _dgCustom;
DGCustom ITwainSessionInternal.DGCustom
{
get
{
if (_dgCustom == null) { _dgCustom = new DGCustom(this); }
return _dgCustom;
}
}
/// <summary>
/// Opens the data source manager. This must be the first method used
/// before using other TWAIN functions. Calls to this must be followed by <see cref="Close"/> when done with a TWAIN session.
@@ -256,12 +251,13 @@ namespace NTwain
/// <returns></returns>
public ReturnCode Open()
{
_selfMsgLoop.Start(this);
var rc = ReturnCode.Failure;
MessageLoop.Instance.Invoke(() =>
_selfMsgLoop.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: OpenManager.", Thread.CurrentThread.ManagedThreadId));
rc = ((ITwainSessionInternal)this).DGControl.Parent.OpenDsm(MessageLoop.Instance.LoopHandle);
rc = ((ITwainSessionInternal)this).DGControl.Parent.OpenDsm(_selfMsgLoop.LoopHandle);
if (rc == ReturnCode.Success)
{
// if twain2 then get memory management functions
@@ -291,14 +287,15 @@ namespace NTwain
public ReturnCode Close()
{
var rc = ReturnCode.Failure;
MessageLoop.Instance.Invoke(() =>
_selfMsgLoop.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: CloseManager.", Thread.CurrentThread.ManagedThreadId));
rc = ((ITwainSessionInternal)this).DGControl.Parent.CloseDsm(MessageLoop.Instance.LoopHandle);
rc = ((ITwainSessionInternal)this).DGControl.Parent.CloseDsm(_selfMsgLoop.LoopHandle);
if (rc == ReturnCode.Success)
{
Platform.MemoryManager = null;
_selfMsgLoop.Stop();
}
});
return rc;
@@ -399,7 +396,7 @@ namespace NTwain
{
var rc = ReturnCode.Failure;
MessageLoop.Instance.Invoke(() =>
_selfMsgLoop.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: EnableSource.", Thread.CurrentThread.ManagedThreadId));
@@ -454,7 +451,7 @@ namespace NTwain
{
var rc = ReturnCode.Failure;
MessageLoop.Instance.Invoke(() =>
_selfMsgLoop.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: DisableSource.", Thread.CurrentThread.ManagedThreadId));
@@ -495,7 +492,7 @@ namespace NTwain
// success, the return status from DG_CONTROL / DAT_PENDINGXFERS / MSG_ENDXFER may
// be ignored.
MessageLoop.Instance.Invoke(() =>
_selfMsgLoop.Invoke(() =>
{
if (targetState < 7)
{
@@ -668,8 +665,22 @@ namespace NTwain
#region handle twain ds message
void HandleWndProcMessage(ref WindowsHook.MESSAGE winMsg, ref bool handled)
#region IWinMessageFilter Members
/// <summary>
/// Checks and handle the message if it's a TWAIN message.
/// </summary>
/// <param name="hwnd">The window handle.</param>
/// <param name="msg">The message.</param>
/// <param name="wParam">The w parameter.</param>
/// <param name="lParam">The l parameter.</param>
/// <returns>
/// true if handled internally.
/// </returns>
public bool IsTwainMessage(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam)
{
bool handled = false;
// this handles the message from a typical WndProc message loop and check if it's from the TWAIN source.
if (_state >= 5)
{
@@ -677,6 +688,8 @@ namespace NTwain
IntPtr msgPtr = IntPtr.Zero;
try
{
var winMsg = new NTwain.Internals.MESSAGE(hwnd, msg, wParam, lParam);
// no need to do another lock call when using marshal alloc
msgPtr = Marshal.AllocHGlobal(Marshal.SizeOf(winMsg));
Marshal.StructureToPtr(winMsg, msgPtr, false);
@@ -695,8 +708,11 @@ namespace NTwain
if (msgPtr != IntPtr.Zero) { Marshal.FreeHGlobal(msgPtr); }
}
}
return handled;
}
#endregion
ReturnCode HandleCallback(TWIdentity origin, TWIdentity destination, DataGroups dg, DataArgumentType dat, Message msg, IntPtr data)
{
if (origin != null && CurrentSource != null && origin.Id == CurrentSource.Identity.Id && _state >= 5)
@@ -705,7 +721,7 @@ namespace NTwain
// spec says we must handle this on the thread that enabled the DS.
// by using the internal dispatcher this will be the case.
MessageLoop.Instance.BeginInvoke(() =>
_selfMsgLoop.BeginInvoke(() =>
{
HandleSourceMsg(msg);
});