QFutureInterfaceBasePrivate: pack to remove padding

This structure was 216 bytes with 3 padding regions: 3 bytes between
continuationState and refCount, 4 bytes between m_progressValue and
m_progress, and 1 byte at the end after the booleans. The total of 8
bytes can be neatly reduced.

And since it's now a multiple of 16, we should get an effective 16 byte
reduction in malloc()ed size.

Change-Id: I69ecc04064514f939896fffd172e46d1d68cb28b
Reviewed-by: Marc Mutz <marc.mutz@qt.io>

1 files changed, 3 insertions, 3 deletions

diff --git a/src/corelib/thread/qfutureinterface_p.h b/src/corelib/thread/qfutureinterface_p.h
index 6258e61de7..92a1072591 100644
--- a/src/corelib/thread/qfutureinterface_p.h
+++ b/src/corelib/thread/qfutureinterface_p.h
@@ -143,9 +143,6 @@ public:
     std::function<void(const QFutureInterfaceBase &)> continuation;
     QFutureInterfaceBasePrivate *continuationData = nullptr;
 
-    enum ContinuationState : quint8 { Default, Canceled, Cleaned };
-    std::atomic<ContinuationState> continuationState { Default };
-
     RefCount refCount = 1;
     QAtomicInt state; // reads and writes can happen unprotected, both must be atomic
 
@@ -163,6 +160,9 @@ public:
     bool isValid = false;
     bool hasException = false;
 
+    enum ContinuationState : quint8 { Default, Canceled, Cleaned };
+    std::atomic<ContinuationState> continuationState { Default };
+
     inline QThreadPool *pool() const
     { return m_pool ? m_pool : QThreadPool::globalInstance(); }