kerneltest/e32test/dll/t_nestedload.cpp
changeset 300 1d28c8722707
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/kerneltest/e32test/dll/t_nestedload.cpp	Tue Nov 02 15:29:23 2010 +0000
@@ -0,0 +1,113 @@
+// Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of the License "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// e32test\dll\t_nestedload.cpp
+// Overview:
+// Test that nested loading of DLLs does not cause incorrect constructor calls
+// API Information:
+// n/a
+// Details:
+// Platforms/Drives/Compatibility:
+// All.
+// Assumptions/Requirement/Pre-requisites:
+// Failures and causes:
+// Base Port information:
+// 
+//
+
+/*
+
+This EXE links to and dynamically loads seven DLLs, t_nestdll1-7.dll.
+The diagram below shows the structure of the linkage. Regular arrows
+are normal static linkage, arrows marked with DY are dynamic loads with
+RLibrary::Load.
+
+ +-----+      +---+      +---+
+ | EXE |----->| 1 |--DY->| 3 |
+ +-----+      +---+      +---+\
+    | \                        \  EXE and 3 both link to 2
+    D  \                        \    +---+
+    Y   +------------------------+-->| 2 |
+    |                                +---+
+    v
+  +---+
+  | 5 |
+  +---+\
+    |   \
+    D    \
+    Y     \
+    |      \
+    v       \
+  +---+      \
+  | 6 |       \
+  +---+        \
+    |           \
+    D            \
+    Y             \
+    |              \
+    v               \   5 and 7 both link to 4
+  +---+              \    +---+
+  | 7 |---------------+-->| 4 |
+  +---+                   +---+
+
+The result should be that the constructors are called in order from 1 to 7,
+with no constructor being called more than once or omitted.
+
+*/
+
+#define __E32TEST_EXTENSION__
+
+#include <e32test.h>
+#include <e32svr.h>
+
+IMPORT_C TInt DataForDLL1();
+IMPORT_C TInt DataForDLL2();
+
+TInt E32Main()
+	{
+	RTest test(_L("T_NESTEDLOAD"));
+	test.Title();
+
+	test.Start(_L("Test nested loading"));
+
+	test.Next(_L("Dummy calls to static dependencies"));
+	DataForDLL1();
+	DataForDLL2();
+
+	test.Next(_L("Load library triggering nested load"));
+	RLibrary lib;
+	test_KErrNone(lib.Load(_L("t_nestdll5.dll")));
+
+	test.Next(_L("Retrieve load order array"));
+	TInt* loadOrder = (TInt*)UserSvr::DllTls(0);
+	test_NotNull(loadOrder);
+
+	test.Next(_L("Load order:"));
+	TInt i;
+	for (i = 0; i < 100; ++i)
+		{
+		if (loadOrder[i] == 0)
+			break;
+		test.Printf(_L("%d "), loadOrder[i]);
+		}
+	test.Printf(_L("\n"));
+
+	// We expect DLLs 1-7 to be loaded in numerical order, with no repeats.
+	for (i = 0; i < 7; ++i)
+		test_Equal(i+1, loadOrder[i]);
+	test_Equal(0, loadOrder[7]);
+
+	test.End();
+	return(KErrNone);
+	}
+