RIP QBasicMutexLocker

This was used as a work-around for Q5MutexLocker's UB downcasting
QBasicMutex to QMutex, and for some unspecified performance
improvements.

Now that Q6MutexLocker is a template, the two are almost
token-by-token identical, so we can remove this work-around and use
QMutexLocker directly.

Partially reverts aea500d5d76864bb1a3918e338ca6806e1766e41.

Pick-to: 6.6 6.5 6.2
Change-Id: I57ef5c53999869aa3454fbbaad884c1d18591b2a
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

1 files changed, 0 insertions, 31 deletions

diff --git a/src/corelib/thread/qorderedmutexlocker_p.h b/src/corelib/thread/qorderedmutexlocker_p.h
index ec4630e034..43985a3faa 100644
--- a/src/corelib/thread/qorderedmutexlocker_p.h
+++ b/src/corelib/thread/qorderedmutexlocker_p.h
@@ -118,35 +118,6 @@ private:
     bool locked;
 };
 
-class QBasicMutexLocker
-{
-public:
-    inline explicit QBasicMutexLocker(QBasicMutex *m) QT_MUTEX_LOCK_NOEXCEPT
-        : m(m), isLocked(true)
-    {
-        m->lock();
-    }
-    inline ~QBasicMutexLocker() { if (isLocked) unlock(); }
-
-    inline void unlock() noexcept
-    {
-        isLocked = false;
-        m->unlock();
-    }
-
-    inline void relock() QT_MUTEX_LOCK_NOEXCEPT
-    {
-        isLocked = true;
-        m->lock();
-    }
-
-private:
-    Q_DISABLE_COPY(QBasicMutexLocker)
-
-    QBasicMutex *m;
-    bool isLocked;
-};
-
 #else
 
 class [[nodiscard]] QOrderedMutexLocker
@@ -167,8 +138,6 @@ public:
     static bool relock(QBasicMutex *, QBasicMutex *) { return false; }
 };
 
-using QBasicMutexLocker = QMutexLocker<QBasicMutex>;
-
 #endif