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0031785: [REGRESSION] Application Framework - application crashes on reading XBF document in background thread

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Class CDF_Session is removed.

Integrated previously but not described:

0029195: OCAF - ensure thread safety for different documents.

Static local variables are eliminated in PCDM package.
Global documents metadata look-up table and directory of opened documents are removed.
Look-up table is maintained now as field in instances of the CDM_Application class.
Methods providing iteration by components are removed from class CDF_Store; signature of methods returned Standard_ExtString is changed to return Handle(TCollection_HExtendedString).
Support of different "Presentations" of documents is eliminated.
This commit is contained in:
abv
2020-09-22 15:24:54 +03:00
committed by bugmaster
parent 0e57793fc6
commit 8a39adb7d8
33 changed files with 230 additions and 479 deletions
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dox/dev_guides/upgrade/upgrade.md
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@@ -2120,6 +2120,26 @@ Old three Message_Printer::Send() methods remain defined virtual with unused las
Redundant class Prs3d_Root has been marked as deprecated - Prs3d_Presentation::NewGroup() should be called directly.
@subsection upgrade_750_cdf_session Support of multiple OCAF application instances
Class *CDF_Session* has been removed.
That class was used to store global instance of OCAF application (object of class *CDM_Application* or descendant, typically *TDataStd_Application*).
Global directory of all opened OCAF documents has been removed as well; such directory is maintained now by each instance of the *CDM_Application* class.
This allows creating programs that work with different OCAF documents concurrently in paralel threads,
provided that each thread deals with its own instance of *TDataStd_Application* and documents managed by this instance.
Note that neither *TDataStd_Application* nor *TDocStd_Document* is protected from concurrent access from several threads.
Such protection, if necessary, shall be implemented on the application level.
For an example, access to labels and attributes could be protected by mutex if there is a probability that different threads access the same labels / attributes:
~~~~~
{
Standard_Mutex::Sentry aSentry (myMainLabelAccess);
TDF_Label aChildLab = aDocument->Main().NewChild();
TDataStd_Integer::Set(aChildLab, 0);
}
~~~~~
@subsection upgrade_750_draw_hotkeys Draw Harness hotkeys
Draw Harness hotkeys **W** (Wireframe) and **S** (Shaded) have been re-mapped to **Ctrl+W** and **Ctrl+S**.