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authorkali <kali@leap.se>2021-02-03 22:46:45 +0100
committerkali kaneko (leap communications) <kali@leap.se>2021-02-08 23:32:18 +0100
commita7dcea9a6e6e5b4b2eccc2ed0d6803c8408ffd0e (patch)
tree0ed16478bcad33f86a4e4266a92b4b1f4ce8c09d /gui/qjsonmodel.cpp
parentf5e7a5d2cab5fc3cfca8c5f75e57090cda27c4e1 (diff)
[bug] add mutex to critical region
This fixes the segfault. mRootItem has to be deallocated to avoid memory leaks, but doing it concurrently with the dump of the json was a terrible idea. - Closes: #360
Diffstat (limited to 'gui/qjsonmodel.cpp')
-rw-r--r--gui/qjsonmodel.cpp56
1 files changed, 31 insertions, 25 deletions
diff --git a/gui/qjsonmodel.cpp b/gui/qjsonmodel.cpp
index 4e36eb8..43260a0 100644
--- a/gui/qjsonmodel.cpp
+++ b/gui/qjsonmodel.cpp
@@ -23,13 +23,16 @@
* SOFTWARE.
*/
-#include <QFile>
+#include <mutex>
#include <QDebug>
+#include <QFile>
#include <QFont>
#include "qjsonmodel.h"
+std::mutex mtx;
+
QJsonTreeItem::QJsonTreeItem(QJsonTreeItem *parent)
{
mParent = parent;
@@ -105,7 +108,6 @@ QJsonTreeItem* QJsonTreeItem::load(const QJsonValue& value, QJsonTreeItem* paren
if ( value.isObject())
{
-
//Get all QJsonValue childs
for (QString key : value.toObject().keys()){
QJsonValue v = value.toObject().value(key);
@@ -115,7 +117,6 @@ QJsonTreeItem* QJsonTreeItem::load(const QJsonValue& value, QJsonTreeItem* paren
rootItem->appendChild(child);
}
-
}
else if ( value.isArray())
@@ -123,7 +124,6 @@ QJsonTreeItem* QJsonTreeItem::load(const QJsonValue& value, QJsonTreeItem* paren
//Get all QJsonValue childs
int index = 0;
for (QJsonValue v : value.toArray()){
-
QJsonTreeItem * child = load(v,rootItem);
child->setKey(QString::number(index));
child->setType(v.type());
@@ -202,13 +202,16 @@ bool QJsonModel::load(QIODevice *device)
bool QJsonModel::loadJson(const QByteArray &json)
{
+ mtx.lock();
+
auto const& jdoc = QJsonDocument::fromJson(json);
+ bool ok = false;
+
if (!jdoc.isNull())
{
beginResetModel();
-
- delete mRootItem;
+ delete mRootItem;
if (jdoc.isArray()) {
mRootItem = QJsonTreeItem::load(QJsonValue(jdoc.array()));
@@ -219,43 +222,42 @@ bool QJsonModel::loadJson(const QByteArray &json)
}
endResetModel();
- // ???
emit dataChanged(QModelIndex(), QModelIndex(), {});
- return true;
+ ok = true;
}
- qDebug()<<Q_FUNC_INFO<<"cannot load json";
- return false;
+ if (!ok)
+ {
+ qDebug()<<Q_FUNC_INFO<<"ERROR: cannot load json";
+ }
+
+ mtx.unlock();
+ return ok;
}
QVariant QJsonModel::data(const QModelIndex &index, int role) const
{
-
if (!index.isValid())
return QVariant();
QJsonTreeItem *item = static_cast<QJsonTreeItem*>(index.internalPointer());
-
switch (role) {
case Roles::KeyRole:
return item->key();
case Roles::ValueRole:
return item->value();
- case Qt::DisplayRole:
- {
- if (index.column() == 0)
- return QString("%1").arg(item->key());
- else if (index.column() == 1)
- return QString("%1").arg(item->value());
- else
- return QString("");
-
+ case Qt::DisplayRole: {
+ if (index.column() == 0)
+ return QString("%1").arg(item->key());
+ else if (index.column() == 1)
+ return QString("%1").arg(item->value());
+ else
+ return QString("");
}
- case Qt::EditRole:
- {
+ case Qt::EditRole: {
if (index.column() == 1)
return QString("%1").arg(item->value());
else
@@ -366,8 +368,10 @@ Qt::ItemFlags QJsonModel::flags(const QModelIndex &index) const
QJsonDocument QJsonModel::json() const
{
+ mtx.lock();
auto v = genJson(mRootItem);
+
QJsonDocument doc;
if (v.isObject()) {
@@ -376,14 +380,16 @@ QJsonDocument QJsonModel::json() const
doc = QJsonDocument(v.toArray());
}
+ mtx.unlock();
return doc;
}
-QJsonValue QJsonModel::genJson(QJsonTreeItem * item) const
+QJsonValue QJsonModel::genJson(QJsonTreeItem * item) const
{
auto type = item->type();
int nchild = item->childCount();
+
if (QJsonValue::Object == type) {
QJsonObject jo;
for (int i = 0; i < nchild; ++i) {
@@ -391,7 +397,7 @@ QJsonValue QJsonModel::genJson(QJsonTreeItem * item) const
auto key = ch->key();
jo.insert(key, genJson(ch));
}
- return jo;
+ return jo;
} else if (QJsonValue::Array == type) {
QJsonArray arr;
for (int i = 0; i < nchild; ++i) {