Add getter and setter for qt_qhash_seed

In some cases it's not possible to use QT_HASH_SEED, specially when
we need to set the environment variable from inside the application,
as dynamically loaded libraries or plugins may create static QHash
instances. That would set qt_qhash_seed to a value different from
-1 and skip the env var value.

For those cases, and when we still want to set qt_qhash_seed, we
provide a way to enforce its value.

Auto-tests accessing qt_qhash_seed directly have been updated
accordingly. Usage in qdoc, uic and rcc has been left as is
for the time being.

Change-Id: I3b35b4fa0223c83b1348a6508641905a2a63266f
Reviewed-by: Lars Knoll <lars.knoll@theqtcompany.com>

1 files changed, 1 insertions, 5 deletions

diff --git a/tests/auto/other/lancelot/tst_lancelot.cpp b/tests/auto/other/lancelot/tst_lancelot.cpp
index 6da3d06ba8..3022114403 100644
--- a/tests/auto/other/lancelot/tst_lancelot.cpp
+++ b/tests/auto/other/lancelot/tst_lancelot.cpp
@@ -259,13 +259,9 @@ void tst_Lancelot::paint(QPaintDevice *device, GraphicsEngine engine, const QStr
 QTEST_MAIN(tst_Lancelot)
 #undef main
 
-QT_BEGIN_NAMESPACE
-extern Q_DECL_IMPORT QBasicAtomicInt qt_qhash_seed; // from qhash.cpp
-QT_END_NAMESPACE
-
 int main(int argc, char *argv[])
 {
-    qt_qhash_seed.store(0);   // Avoid rendering variations caused by QHash randomization
+    qSetGlobalQHashSeed(0);   // Avoid rendering variations caused by QHash randomization
 
     QBaselineTest::handleCmdLineArgs(&argc, &argv);
     return _realmain(argc, argv);