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Changeset 2 for swappable message loop hook implementations.

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soukoku
2014-05-25 08:45:52 -04:00
parent 61b0e89313
commit 764c75a7a0
12 changed files with 285 additions and 63 deletions
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54
NTwain/TwainSession.cs
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@@ -41,15 +41,13 @@ namespace NTwain
_appId = appId;
((ITwainSessionInternal)this).ChangeState(1, false);
EnforceState = true;
_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>();
@@ -64,9 +62,8 @@ namespace NTwain
}
/// <summary>
/// Gets or sets the optional synchronization context.
/// This allows events to be raised on the thread
/// associated with the context.
/// Gets or sets the optional synchronization context when not specifying a <see cref="MessageLoopHook"/> on <see cref="Open"/>.
/// This allows events to be raised on the thread associated with the context. This is experimental is not recommended for use.
/// </summary>
/// <value>
/// The synchronization context.
@@ -76,8 +73,8 @@ namespace NTwain
#region ITwainSessionInternal Members
MessageLoop _selfMsgLoop;
MessageLoop ITwainSessionInternal.SelfMessageLoop { get { return _selfMsgLoop; } }
MessageLoopHook _msgLoopHook;
MessageLoopHook ITwainSessionInternal.MessageLoopHook { get { return _msgLoopHook; } }
/// <summary>
/// Gets the app id used for the session.
@@ -246,18 +243,35 @@ namespace NTwain
/// <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.
/// before using other TWAIN functions. Calls to this must be followed by
/// <see cref="Close" /> when done with a TWAIN session.
/// </summary>
/// <returns></returns>
/// <returns></returns
public ReturnCode Open()
{
_selfMsgLoop.Start(this);
return Open(new InternalMessageLoopHook());
}
/// <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.
/// </summary>
/// <param name="messageLoopHook">The message loop hook.</param>
/// <returns></returns>
/// <exception cref="System.ArgumentNullException">messageLoopHook</exception>
public ReturnCode Open(MessageLoopHook messageLoopHook)
{
if (messageLoopHook == null) { throw new ArgumentNullException("messageLoopHook"); }
_msgLoopHook = messageLoopHook;
_msgLoopHook.Start(this);
var rc = ReturnCode.Failure;
_selfMsgLoop.Invoke(() =>
_msgLoopHook.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: OpenManager.", Thread.CurrentThread.ManagedThreadId));
rc = ((ITwainSessionInternal)this).DGControl.Parent.OpenDsm(_selfMsgLoop.LoopHandle);
rc = ((ITwainSessionInternal)this).DGControl.Parent.OpenDsm(_msgLoopHook.Handle);
if (rc == ReturnCode.Success)
{
// if twain2 then get memory management functions
@@ -287,15 +301,15 @@ namespace NTwain
public ReturnCode Close()
{
var rc = ReturnCode.Failure;
_selfMsgLoop.Invoke(() =>
_msgLoopHook.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: CloseManager.", Thread.CurrentThread.ManagedThreadId));
rc = ((ITwainSessionInternal)this).DGControl.Parent.CloseDsm(_selfMsgLoop.LoopHandle);
rc = ((ITwainSessionInternal)this).DGControl.Parent.CloseDsm(_msgLoopHook.Handle);
if (rc == ReturnCode.Success)
{
Platform.MemoryManager = null;
_selfMsgLoop.Stop();
_msgLoopHook.Stop();
}
});
return rc;
@@ -396,7 +410,7 @@ namespace NTwain
{
var rc = ReturnCode.Failure;
_selfMsgLoop.Invoke(() =>
_msgLoopHook.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: EnableSource.", Thread.CurrentThread.ManagedThreadId));
@@ -451,7 +465,7 @@ namespace NTwain
{
var rc = ReturnCode.Failure;
_selfMsgLoop.Invoke(() =>
_msgLoopHook.Invoke(() =>
{
Debug.WriteLine(string.Format(CultureInfo.InvariantCulture, "Thread {0}: DisableSource.", Thread.CurrentThread.ManagedThreadId));
@@ -492,7 +506,7 @@ namespace NTwain
// success, the return status from DG_CONTROL / DAT_PENDINGXFERS / MSG_ENDXFER may
// be ignored.
_selfMsgLoop.Invoke(() =>
_msgLoopHook.Invoke(() =>
{
if (targetState < 7)
{
@@ -721,7 +735,7 @@ 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.
_selfMsgLoop.BeginInvoke(() =>
_msgLoopHook.BeginInvoke(() =>
{
HandleSourceMsg(msg);
});