Remove QTextCodec dependency from QCoreGobalData

As we want to move text codecs out of Qt Core, disentangle the
dependency, but moving the global codec data into qtextcodec.*.

Change-Id: Id7498423c7c4f9f42fd00c450947305d2af8c4be
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Reviewed-by: Alex Blasche <alexander.blasche@qt.io>

src/corelib/codecs/qicucodec.cpp

@@ -43,7 +43,6 @@
 #include "qutfcodec_p.h"
 #include "qlatincodec_p.h"
 #include "qsimplecodec_p.h"
-#include "private/qcoreglobaldata_p.h"
 #include "qdebug.h"
 
 #include "unicode/ucnv.h"
@@ -436,7 +435,7 @@ QList<int> QIcuCodec::availableMibs()
 
 QTextCodec *QIcuCodec::defaultCodecUnlocked()
 {
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (!globalData)
         return nullptr;
     QTextCodec *c = globalData->codecForLocale.loadAcquire();
@@ -491,7 +490,7 @@ QTextCodec *QIcuCodec::codecForNameUnlocked(const char *name)
             standardName = "windows-949";
     }
 
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     QTextCodecCache *cache = &globalData->codecCache;
 
     QTextCodec *codec;

src/corelib/codecs/qtextcodec.cpp

@@ -53,7 +53,6 @@
 #if !defined(QT_BOOTSTRAPPED)
 #include <private/qcoreapplication_p.h>
 #endif
-#include "private/qcoreglobaldata_p.h"
 
 #include "qutfcodec_p.h"
 #include "qlatincodec_p.h"
@@ -103,6 +102,28 @@ typedef QList<QByteArray>::ConstIterator ByteArrayListConstIt;
 
 Q_GLOBAL_STATIC(QRecursiveMutex, textCodecsMutex);
 
+Q_GLOBAL_STATIC(QTextCodecData, textCodecData)
+
+QTextCodecData::QTextCodecData()
+    : codecForLocale(nullptr)
+{
+}
+
+QTextCodecData::~QTextCodecData()
+{
+    codecForLocale = nullptr;
+    QList<QTextCodec *> tmp = allCodecs;
+    allCodecs.clear();
+    codecCache.clear();
+    for (QList<QTextCodec *>::const_iterator it = tmp.constBegin(); it != tmp.constEnd(); ++it)
+        delete *it;
+}
+
+QTextCodecData *QTextCodecData::instance()
+{
+    return textCodecData();
+}
+
 class TextCodecsMutexLocker
 {
     using Lock = decltype(qt_unique_lock(std::declval<QRecursiveMutex&>()));
@@ -166,7 +187,7 @@ static void setup();
 // setCodecForLocale(0) is called at the same time.
 static QTextCodec *setupLocaleMapper()
 {
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
 
     QTextCodec *locale = nullptr;
 
@@ -477,7 +498,7 @@ QTextCodec::QTextCodec()
 {
     const TextCodecsMutexLocker locker;
 
-    QCoreGlobalData *globalInstance = QCoreGlobalData::instance();
+    QTextCodecData *globalInstance = QTextCodecData::instance();
     if (globalInstance->allCodecs.isEmpty())
         setup();
 
@@ -493,7 +514,7 @@ QTextCodec::QTextCodec()
 */
 QTextCodec::~QTextCodec()
 {
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (!globalData)
         return;
 
@@ -534,7 +555,7 @@ QTextCodec *QTextCodec::codecForName(const QByteArray &name)
 
     const TextCodecsMutexLocker locker;
 
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (!globalData)
         return nullptr;
     setup();
@@ -578,7 +599,7 @@ QTextCodec* QTextCodec::codecForMib(int mib)
 {
     const TextCodecsMutexLocker locker;
 
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (!globalData)
         return nullptr;
     if (globalData->allCodecs.isEmpty())
@@ -624,7 +645,7 @@ QList<QByteArray> QTextCodec::availableCodecs()
 {
     const TextCodecsMutexLocker locker;
 
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (globalData->allCodecs.isEmpty())
         setup();
 
@@ -656,7 +677,7 @@ QList<int> QTextCodec::availableMibs()
 #else
     const TextCodecsMutexLocker locker;
 
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (globalData->allCodecs.isEmpty())
         setup();
 
@@ -683,7 +704,7 @@ QList<int> QTextCodec::availableMibs()
 */
 void QTextCodec::setCodecForLocale(QTextCodec *c)
 {
-    QCoreGlobalData::instance()->codecForLocale.storeRelease(c);
+    QTextCodecData::instance()->codecForLocale.storeRelease(c);
 }
 
 /*!
@@ -697,7 +718,7 @@ void QTextCodec::setCodecForLocale(QTextCodec *c)
 
 QTextCodec* QTextCodec::codecForLocale()
 {
-    QCoreGlobalData *globalData = QCoreGlobalData::instance();
+    QTextCodecData *globalData = QTextCodecData::instance();
     if (!globalData)
         return nullptr;
 

src/corelib/codecs/qtextcodec.h

@@ -117,7 +117,7 @@ protected:
     virtual ~QTextCodec();
 
 private:
-    friend struct QCoreGlobalData;
+    friend struct QTextCodecData;
 };
 
 class Q_CORE_EXPORT QTextEncoder {

src/corelib/codecs/qtextcodec_p.h

@@ -53,19 +53,35 @@
 
 #include <QtCore/private/qglobal_p.h>
 #include <string.h>
+#include <qhash.h>
+#if QT_CONFIG(textcodec)
+#include "qtextcodec.h"
+#endif
 
 QT_BEGIN_NAMESPACE
 
 #if QT_CONFIG(textcodec)
 
-#include "qtextcodec.h"
-
 #if defined(Q_OS_MAC) || defined(Q_OS_ANDROID) || defined(Q_OS_QNX) || defined(Q_OS_WASM)
 #define QT_LOCALE_IS_UTF8
 #endif
 
 typedef void (*QTextCodecStateFreeFunction)(QTextCodec::ConverterState*);
 
+typedef QHash<QByteArray, QTextCodec *> QTextCodecCache;
+
+struct QTextCodecData
+{
+    QTextCodecData();
+    ~QTextCodecData();
+
+    QList<QTextCodec*> allCodecs;
+    QAtomicPointer<QTextCodec> codecForLocale;
+    QTextCodecCache codecCache;
+
+    static QTextCodecData *instance();
+};
+
 bool qTextCodecNameMatch(const char *a, const char *b);
 
 #else // without textcodec:

src/corelib/kernel/qcoreglobaldata.cpp

@@ -38,31 +38,17 @@
 ****************************************************************************/
 
 #include "qcoreglobaldata_p.h"
-#if QT_CONFIG(textcodec)
-#include "qtextcodec.h"
-#endif
 
 QT_BEGIN_NAMESPACE
 
 Q_GLOBAL_STATIC(QCoreGlobalData, globalInstance)
 
 QCoreGlobalData::QCoreGlobalData()
-#if QT_CONFIG(textcodec)
-    : codecForLocale(nullptr)
-#endif
 {
 }
 
 QCoreGlobalData::~QCoreGlobalData()
 {
-#if QT_CONFIG(textcodec)
-    codecForLocale = nullptr;
-    QList<QTextCodec *> tmp = allCodecs;
-    allCodecs.clear();
-    codecCache.clear();
-    for (QList<QTextCodec *>::const_iterator it = tmp.constBegin(); it != tmp.constEnd(); ++it)
-        delete *it;
-#endif
 }
 
 QCoreGlobalData *QCoreGlobalData::instance()

src/corelib/kernel/qcoreglobaldata_p.h

@@ -57,15 +57,10 @@
 #include "QtCore/qreadwritelock.h"
 #include "QtCore/qhash.h"
 #include "QtCore/qbytearray.h"
-#if QT_CONFIG(textcodec)
-#include "QtCore/qtextcodec.h"
-#endif
 #include "QtCore/qmutex.h"
 
 QT_BEGIN_NAMESPACE
 
-typedef QHash<QByteArray, QTextCodec *> QTextCodecCache;
-
 struct QCoreGlobalData {
     QCoreGlobalData();
     ~QCoreGlobalData();
@@ -73,12 +68,6 @@ struct QCoreGlobalData {
     QMap<QString, QStringList> dirSearchPaths;
     QReadWriteLock dirSearchPathsLock;
 
-#if QT_CONFIG(textcodec)
-    QList<QTextCodec*> allCodecs;
-    QAtomicPointer<QTextCodec> codecForLocale;
-    QTextCodecCache codecCache;
-#endif
-
     static QCoreGlobalData *instance();
 };