From 3bc10fb9bb930c4e1baf52f9d0ba97616e8e77f6 Mon Sep 17 00:00:00 2001
From: Marc Mutz <marc.mutz@kdab.com>
Date: Sat, 8 Jun 2019 12:00:05 +0200
Subject: QEvdev: Replace manual memory management with unique_ptr

Make create() return, and m_mice/m_keyboards/etc store, handlers by unique_ptr.
In most cases, we can't use qt_make_unique(), since the ctor we're calling is
marked as private.

Since QHash can't hold move-only types, use a std::vector<{QString, unique_ptr}>
instead. As this pattern repeats in all four QEvdev*Manager classes, create a
small class template.

Saves almost 6KiB on optimized Linux AMD64 GCC 9.1 builds across all .so's that
link to QtInputSupport.a.

Change-Id: I8f62b6b629d6e1855314c0a4fb4fc069db9ae0ce
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
---
 .../input/evdevtablet/qevdevtabletmanager.cpp                | 12 ++++--------
 1 file changed, 4 insertions(+), 8 deletions(-)

(limited to 'src/platformsupport/input/evdevtablet/qevdevtabletmanager.cpp')

diff --git a/src/platformsupport/input/evdevtablet/qevdevtabletmanager.cpp b/src/platformsupport/input/evdevtablet/qevdevtabletmanager.cpp
index eedde9a96e..d503476aad 100644
--- a/src/platformsupport/input/evdevtablet/qevdevtabletmanager.cpp
+++ b/src/platformsupport/input/evdevtablet/qevdevtabletmanager.cpp
@@ -46,6 +46,7 @@
 #include <QtDeviceDiscoverySupport/private/qdevicediscovery_p.h>
 #include <private/qguiapplication_p.h>
 #include <private/qinputdevicemanager_p_p.h>
+#include <private/qmemory_p.h>
 
 QT_BEGIN_NAMESPACE
 
@@ -99,16 +100,14 @@ QEvdevTabletManager::QEvdevTabletManager(const QString &key, const QString &spec
 
 QEvdevTabletManager::~QEvdevTabletManager()
 {
-    qDeleteAll(m_activeDevices);
 }
 
 void QEvdevTabletManager::addDevice(const QString &deviceNode)
 {
     qCDebug(qLcEvdevTablet, "Adding device at %ls", qUtf16Printable(deviceNode));
-    QEvdevTabletHandlerThread *handler;
-    handler = new QEvdevTabletHandlerThread(deviceNode, m_spec);
+    auto handler = qt_make_unique<QEvdevTabletHandlerThread>(deviceNode, m_spec);
     if (handler) {
-        m_activeDevices.insert(deviceNode, handler);
+        m_activeDevices.add(deviceNode, std::move(handler));
         updateDeviceCount();
     } else {
         qWarning("evdevtablet: Failed to open tablet device %ls", qUtf16Printable(deviceNode));
@@ -117,12 +116,9 @@ void QEvdevTabletManager::addDevice(const QString &deviceNode)
 
 void QEvdevTabletManager::removeDevice(const QString &deviceNode)
 {
-    if (m_activeDevices.contains(deviceNode)) {
+    if (m_activeDevices.remove(deviceNode)) {
         qCDebug(qLcEvdevTablet, "Removing device at %ls", qUtf16Printable(deviceNode));
-        QEvdevTabletHandlerThread *handler = m_activeDevices.value(deviceNode);
-        m_activeDevices.remove(deviceNode);
         updateDeviceCount();
-        delete handler;
     }
 }
 
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