Merge branch 4.7 into qt-master-from-4.7

2 files changed, 89 insertions, 1 deletions

diff --git a/src/s60main/newallocator_hook.cpp b/src/s60main/newallocator_hook.cpp
index 9cc6afb728..9ea2ef0962 100644
--- a/src/s60main/newallocator_hook.cpp
+++ b/src/s60main/newallocator_hook.cpp
@@ -41,6 +41,11 @@
 #include <e32std.h>
 #include <qglobal.h>
 
+#ifdef QT_EXPORTS_NOT_FROZEN
+// If exports in Qt DLLs are not frozen in this build, then we have to pick up the
+// allocator creation function by import link. We know the function will be present
+// in the DLLs we test with, as we have to use the DLLs we have built.
+
 struct SStdEpocThreadCreateInfo;
 
 Q_CORE_EXPORT TInt qt_symbian_SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo);
@@ -51,8 +56,88 @@ Q_CORE_EXPORT TInt qt_symbian_SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCre
  * Uses link-time symbol preemption to capture a call from the application
  * startup. On return, there is some kind of heap allocator installed on the
  * thread.
-*/ 
+*/
 TInt UserHeap::SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo)
 {
     return qt_symbian_SetupThreadHeap(aNotFirst, aInfo);
 }
+
+#else // QT_EXPORTS_NOT_FROZEN
+// If we are using an export frozen build, it should be compatible with all 4.7.x Qt releases.
+// We want to use the allocator creation function introduced in qtcore.dll after 4.7.1. But we
+// can't import link to it, as it may not be present in whatever 4.7.x DLLs we are running with.
+// So the function is found and called dynamically, by library lookup. If it is not found, we
+// use the OS allocator creation functions instead.
+
+struct SThreadCreateInfo
+    {
+    TAny* iHandle;
+    TInt iType;
+    TThreadFunction iFunction;
+    TAny* iPtr;
+    TAny* iSupervisorStack;
+    TInt iSupervisorStackSize;
+    TAny* iUserStack;
+    TInt iUserStackSize;
+    TInt iInitialThreadPriority;
+    TPtrC iName;
+    TInt iTotalSize;    // Size including any extras (must be a multiple of 8 bytes)
+    };
+
+struct SStdEpocThreadCreateInfo : public SThreadCreateInfo
+    {
+    RAllocator* iAllocator;
+    TInt iHeapInitialSize;
+    TInt iHeapMaxSize;
+    TInt iPadding;      // Make structure size a multiple of 8 bytes
+    };
+
+
+/* \internal
+ *
+ * Uses link-time symbol preemption to capture a call from the application
+ * startup. On return, there is some kind of heap allocator installed on the
+ * thread.
+*/
+TInt UserHeap::SetupThreadHeap(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo)
+{
+    TInt r = KErrNone;
+
+#ifndef __WINS__
+    // attempt to create the fast allocator through a known export ordinal in qtcore.dll
+    RLibrary qtcore;
+    if (qtcore.Load(_L("qtcore.dll")) == KErrNone)
+    {
+        const int qt_symbian_SetupThreadHeap_eabi_ordinal = 3713;
+        TLibraryFunction libFunc = qtcore.Lookup(qt_symbian_SetupThreadHeap_eabi_ordinal);
+        if (libFunc)
+        {
+            typedef int (*TSetupThreadHeapFunc)(TBool aNotFirst, SStdEpocThreadCreateInfo& aInfo);
+            TSetupThreadHeapFunc p_qt_symbian_SetupThreadHeap = TSetupThreadHeapFunc(libFunc);
+            r = (*p_qt_symbian_SetupThreadHeap)(aNotFirst, aInfo);
+        }
+        qtcore.Close();
+        if (libFunc)
+            return r;
+    }
+#endif
+
+    // no fast allocator support - use default allocator creation
+    if (!aInfo.iAllocator && aInfo.iHeapInitialSize>0)
+        {
+        // new heap required
+        RHeap* pH = NULL;
+        r = UserHeap::CreateThreadHeap(aInfo, pH);
+        }
+    else if (aInfo.iAllocator)
+        {
+        // sharing a heap
+        RAllocator* pA = aInfo.iAllocator;
+        pA->Open();
+        User::SwitchAllocator(pA);
+        r = KErrNone;
+        }
+    return r;
+}
+
+#endif // QT_EXPORTS_NOT_FROZEN
diff --git a/src/s60main/s60main.pro b/src/s60main/s60main.pro
index 664f155f7d..8ab3bd381d 100644
--- a/src/s60main/s60main.pro
+++ b/src/s60main/s60main.pro
@@ -31,6 +31,9 @@ symbian {
     # against GCCE apps, so remove it
     MMP_RULES -= $$MMP_RULES_DONT_EXPORT_ALL_CLASS_IMPEDIMENTA
     linux-armcc:QMAKE_CXXFLAGS *= --export_all_vtbl
+
+    # Flag if exports are not frozen to avoid lookup of qtcore allocator creation function by ordinal
+    contains(CONFIG, def_files_disabled): DEFINES += QT_EXPORTS_NOT_FROZEN
 } else {
     error("$$_FILE_ is intended only for Symbian!")
 }