3 files changed, 17 insertions, 17 deletions

diff --git a/src/corelib/codecs/qlatincodec.cpp b/src/corelib/codecs/qlatincodec.cpp
index 1b53d26ef4..463c5a56ae 100644
--- a/src/corelib/codecs/qlatincodec.cpp
+++ b/src/corelib/codecs/qlatincodec.cpp
@@ -48,7 +48,7 @@ QLatin1Codec::~QLatin1Codec()
 
 QString QLatin1Codec::convertToUnicode(const char *chars, int len, ConverterState *) const
 {
-    if (chars == 0)
+    if (chars == nullptr)
         return QString();
 
     return QString::fromLatin1(chars, len);
@@ -104,7 +104,7 @@ QLatin15Codec::~QLatin15Codec()
 
 QString QLatin15Codec::convertToUnicode(const char* chars, int len, ConverterState *) const
 {
-    if (chars == 0)
+    if (chars == nullptr)
         return QString();
 
     QString str = QString::fromLatin1(chars, len);
diff --git a/src/corelib/codecs/qsimplecodec.cpp b/src/corelib/codecs/qsimplecodec.cpp
index 9ab545d783..16a9b8a7c3 100644
--- a/src/corelib/codecs/qsimplecodec.cpp
+++ b/src/corelib/codecs/qsimplecodec.cpp
@@ -610,7 +610,7 @@ QSimpleTextCodec::QSimpleTextCodec(int i) : forwardIndex(i), reverseMap(0)
 
 QSimpleTextCodec::~QSimpleTextCodec()
 {
-    delete reverseMap.load();
+    delete reverseMap.loadAcquire();
 }
 
 static QByteArray *buildReverseMap(int forwardIndex)
@@ -662,12 +662,12 @@ QByteArray QSimpleTextCodec::convertFromUnicode(const QChar *in, int length, Con
     const char replacement = (state && state->flags & ConvertInvalidToNull) ? 0 : '?';
     int invalid = 0;
 
-    QByteArray *rmap = reverseMap.load();
+    QByteArray *rmap = reverseMap.loadAcquire();
     if (!rmap){
         rmap = buildReverseMap(this->forwardIndex);
         if (!reverseMap.testAndSetRelease(0, rmap)) {
             delete rmap;
-            rmap = reverseMap.load();
+            rmap = reverseMap.loadAcquire();
         }
     }
 
diff --git a/src/corelib/codecs/qtextcodec.cpp b/src/corelib/codecs/qtextcodec.cpp
index a86db142f9..85cfcdbf48 100644
--- a/src/corelib/codecs/qtextcodec.cpp
+++ b/src/corelib/codecs/qtextcodec.cpp
@@ -159,7 +159,7 @@ static QTextCodec *setupLocaleMapper()
 {
     QCoreGlobalData *globalData = QCoreGlobalData::instance();
 
-    QTextCodec *locale = 0;
+    QTextCodec *locale = nullptr;
 
     {
         QMutexLocker locker(textCodecsMutex());
@@ -208,7 +208,7 @@ static QTextCodec *setupLocaleMapper()
         // First part is getting that locale name.  First try setlocale() which
         // definitely knows it, but since we cannot fully trust it, get ready
         // to fall back to environment variables.
-        const QByteArray ctype = setlocale(LC_CTYPE, 0);
+        const QByteArray ctype = setlocale(LC_CTYPE, nullptr);
 
         // Get the first nonempty value from $LC_ALL, $LC_CTYPE, and $LANG
         // environment variables.
@@ -532,13 +532,13 @@ QTextCodec::~QTextCodec()
 QTextCodec *QTextCodec::codecForName(const QByteArray &name)
 {
     if (name.isEmpty())
-        return 0;
+        return nullptr;
 
     QMutexLocker locker(textCodecsMutex());
 
     QCoreGlobalData *globalData = QCoreGlobalData::instance();
     if (!globalData)
-        return 0;
+        return nullptr;
     setup();
 
 #if !QT_CONFIG(icu)
@@ -567,7 +567,7 @@ QTextCodec *QTextCodec::codecForName(const QByteArray &name)
         }
     }
 
-    return 0;
+    return nullptr;
 #else
     return QIcuCodec::codecForNameUnlocked(name);
 #endif
@@ -585,7 +585,7 @@ QTextCodec* QTextCodec::codecForMib(int mib)
 
     QCoreGlobalData *globalData = QCoreGlobalData::instance();
     if (!globalData)
-        return 0;
+        return nullptr;
     if (globalData->allCodecs.isEmpty())
         setup();
 
@@ -611,7 +611,7 @@ QTextCodec* QTextCodec::codecForMib(int mib)
 #if QT_CONFIG(icu)
     return QIcuCodec::codecForMibUnlocked(mib);
 #else
-    return 0;
+    return nullptr;
 #endif
 }
 
@@ -704,7 +704,7 @@ QTextCodec* QTextCodec::codecForLocale()
 {
     QCoreGlobalData *globalData = QCoreGlobalData::instance();
     if (!globalData)
-        return 0;
+        return nullptr;
 
     QTextCodec *codec = globalData->codecForLocale.loadAcquire();
     if (!codec) {
@@ -830,7 +830,7 @@ QTextEncoder* QTextCodec::makeEncoder(QTextCodec::ConversionFlags flags) const
 */
 QByteArray QTextCodec::fromUnicode(const QString& str) const
 {
-    return convertFromUnicode(str.constData(), str.length(), 0);
+    return convertFromUnicode(str.constData(), str.length(), nullptr);
 }
 #endif
 
@@ -863,7 +863,7 @@ QByteArray QTextCodec::fromUnicode(QStringView str) const
 */
 QString QTextCodec::toUnicode(const QByteArray& a) const
 {
-    return convertToUnicode(a.constData(), a.length(), 0);
+    return convertToUnicode(a.constData(), a.length(), nullptr);
 }
 
 /*!
@@ -915,7 +915,7 @@ bool QTextCodec::canEncode(QStringView s) const
 QString QTextCodec::toUnicode(const char *chars) const
 {
     int len = qstrlen(chars);
-    return convertToUnicode(chars, len, 0);
+    return convertToUnicode(chars, len, nullptr);
 }
 
 
@@ -1110,7 +1110,7 @@ QString QTextDecoder::toUnicode(const QByteArray &ba)
 QTextCodec *QTextCodec::codecForHtml(const QByteArray &ba, QTextCodec *defaultCodec)
 {
     // determine charset
-    QTextCodec *c = QTextCodec::codecForUtfText(ba, 0);
+    QTextCodec *c = QTextCodec::codecForUtfText(ba, nullptr);
     if (!c) {
         static Q_RELAXED_CONSTEXPR auto matcher = qMakeStaticByteArrayMatcher("meta ");
         QByteArray header = ba.left(1024).toLower();