1 files changed, 86 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4identifierhashdata_p.h b/src/qml/jsruntime/qv4identifierhashdata_p.h
new file mode 100644
index 0000000000..664e8e803d
--- /dev/null
+++ b/src/qml/jsruntime/qv4identifierhashdata_p.h
@@ -0,0 +1,86 @@
+// Copyright (C) 2020 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+#ifndef QV4IDENTIFIERHASHDATA_H
+#define QV4IDENTIFIERHASHDATA_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include <private/qv4global_p.h>
+#include <private/qv4propertykey_p.h>
+#include <private/qv4identifiertable_p.h>
+#include <QtCore/qatomic.h>
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+struct IdentifierHashEntry {
+    PropertyKey identifier;
+    int value;
+};
+
+struct IdentifierHashData
+{
+    IdentifierHashData(IdentifierTable *table, int numBits)
+        : size(0)
+        , numBits(numBits)
+        , identifierTable(table)
+    {
+        refCount.storeRelaxed(1);
+        alloc = qPrimeForNumBits(numBits);
+        entries = (IdentifierHashEntry *)malloc(alloc*sizeof(IdentifierHashEntry));
+        memset(entries, 0, alloc*sizeof(IdentifierHashEntry));
+        identifierTable->addIdentifierHash(this);
+    }
+
+    explicit IdentifierHashData(IdentifierHashData *other)
+        : size(other->size)
+        , numBits(other->numBits)
+        , identifierTable(other->identifierTable)
+    {
+        refCount.storeRelaxed(1);
+        alloc = other->alloc;
+        entries = (IdentifierHashEntry *)malloc(alloc*sizeof(IdentifierHashEntry));
+        memcpy(entries, other->entries, alloc*sizeof(IdentifierHashEntry));
+        identifierTable->addIdentifierHash(this);
+    }
+
+    ~IdentifierHashData() {
+        free(entries);
+        if (identifierTable)
+            identifierTable->removeIdentifierHash(this);
+    }
+
+    void markObjects(MarkStack *markStack) const
+    {
+        IdentifierHashEntry *e = entries;
+        IdentifierHashEntry *end = e + alloc;
+        while (e < end) {
+            if (Heap::Base *o = e->identifier.asStringOrSymbol())
+                o->mark(markStack);
+            ++e;
+        }
+    }
+
+    QBasicAtomicInt refCount;
+    int alloc;
+    int size;
+    int numBits;
+    IdentifierTable *identifierTable;
+    IdentifierHashEntry *entries;
+};
+
+} // namespace QV4
+
+QT_END_NAMESPACE
+
+#endif // QV4IDENTIFIERHASHDATA_P_H