Implemented GlobalReceiverV2.

A new implementation of GlobalRecever that optmize the signal
connection.

Fixes bug #928.

Reviewer: Marcelo Lira <marcelo.lira@openbossa.org>
          Luciano Wolf <luciano.wolf@openbossa.org>

1 files changed, 308 insertions, 0 deletions

diff --git a/libpyside/globalreceiverv2.cpp b/libpyside/globalreceiverv2.cpp
new file mode 100644
index 000000000..c31a9d2f6
--- /dev/null
+++ b/libpyside/globalreceiverv2.cpp
@@ -0,0 +1,308 @@
+/*
+* This file is part of the PySide project.
+*
+* Copyright (C) 2009-2010 Nokia Corporation and/or its subsidiary(-ies).
+*
+* Contact: PySide team <contact@pyside.org>
+*
+* This library is free software; you can redistribute it and/or
+* modify it under the terms of the GNU Lesser General Public
+* License as published by the Free Software Foundation; either
+* version 2.1 of the License, or (at your option) any later version.
+*
+* This library is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+* Lesser General Public License for more details.
+*
+* You should have received a copy of the GNU Lesser General Public
+* License along with this library; if not, write to the Free Software
+* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+*/
+
+#include "globalreceiverv2.h"
+#include "dynamicqmetaobject_p.h"
+#include "pysideweakref.h"
+
+#include <QMetaMethod>
+#include <QDebug>
+#include <QEvent>
+#include <QLinkedList>
+#include <autodecref.h>
+#include <gilstate.h>
+
+#include "typeresolver.h"
+#include "signalmanager.h"
+
+#define RECEIVER_DESTROYED_SLOT_NAME "__receiverDestroyed__(QObject*)"
+
+namespace
+{
+    static int DESTROY_SIGNAL_ID = 0;
+    static int DESTROY_SLOT_ID = 0;
+}
+
+namespace PySide
+{
+class DynamicSlotDataV2
+{
+    public:
+        DynamicSlotDataV2(PyObject* callback, GlobalReceiverV2* parent);
+        ~DynamicSlotDataV2();
+
+        int addSlot(const char* signature);
+        int id(const char* signature) const;
+        PyObject* call(PyObject* args);
+        QByteArray hash() const;
+        void notify();
+
+        static void onCallbackDestroyed(void* data);
+        static QByteArray hash(PyObject *callback);
+
+
+    private:
+        bool m_isMethod;
+        PyObject* m_callback;
+        PyObject* m_pythonSelf;
+        PyObject* m_pyClass;
+        PyObject* m_weakRef;
+        QMap<QByteArray, int> m_signatures;
+        GlobalReceiverV2* m_parent;
+        QByteArray m_hash;
+};
+
+}
+
+using namespace PySide;
+
+DynamicSlotDataV2::DynamicSlotDataV2(PyObject* callback, GlobalReceiverV2* parent)
+    : m_pythonSelf(0), m_pyClass(0), m_weakRef(0), m_parent(parent)
+{
+    m_isMethod = PyMethod_Check(callback);
+    if (m_isMethod) {
+        //Can not store calback pointe because this will be destroyed at the end of the scope
+        //To avoid increment intance reference keep the callback information
+        m_callback = PyMethod_GET_FUNCTION(callback);
+        m_pyClass = PyMethod_GET_CLASS(callback);
+        m_pythonSelf = PyMethod_GET_SELF(callback);
+
+        //monitor class from method lifetime
+        m_weakRef = WeakRef::create(m_pythonSelf, DynamicSlotDataV2::onCallbackDestroyed, this);
+
+        m_hash = QByteArray::number((qlonglong)PyObject_Hash(m_callback))
+                 + QByteArray::number((qlonglong)PyObject_Hash(m_pythonSelf));
+
+    } else {
+        m_callback = callback;
+        Py_INCREF(m_callback);
+
+        m_hash = QByteArray::number((qlonglong)PyObject_Hash(m_callback));
+    }
+}
+
+QByteArray DynamicSlotDataV2::hash() const
+{
+    return m_hash;
+}
+
+QByteArray DynamicSlotDataV2::hash(PyObject* callback)
+{
+    Shiboken::GilState gil;
+    if (PyMethod_Check(callback))
+        return  QByteArray::number((qlonglong)PyObject_Hash(PyMethod_GET_FUNCTION(callback))) 
+              + QByteArray::number((qlonglong)PyObject_Hash(PyMethod_GET_SELF(callback)));
+    else
+        return QByteArray::number((qlonglong)PyObject_Hash(callback));
+}
+
+PyObject* DynamicSlotDataV2::call(PyObject* args)
+{
+    PyObject* callback = m_callback;
+
+    //create a callback based on method data
+    if (m_isMethod)
+        callback = PyMethod_New(m_callback, m_pythonSelf, m_pyClass);
+
+    PyObject* result =  PyObject_CallObject(callback, args);
+
+    if (m_isMethod)
+        Py_DECREF(callback);
+
+    return result;
+}
+
+int DynamicSlotDataV2::id(const char* signature) const
+{
+    if (m_signatures.contains(signature))
+        return m_signatures[signature];
+    return -1;
+}
+
+int DynamicSlotDataV2::addSlot(const char* signature)
+{
+    int index = id(signature);
+    if (index == -1) {
+        DynamicQMetaObject *dmo = const_cast<DynamicQMetaObject*>(reinterpret_cast<const DynamicQMetaObject*>(m_parent->metaObject()));
+        index = m_signatures[signature] = dmo->addSlot(signature);
+    }
+    return index;
+}
+
+void DynamicSlotDataV2::onCallbackDestroyed(void *data)
+{
+    DynamicSlotDataV2* self = reinterpret_cast<DynamicSlotDataV2*>(data);
+    self->m_weakRef = 0;
+    delete self->m_parent;
+}
+
+DynamicSlotDataV2::~DynamicSlotDataV2()
+{
+    Shiboken::GilState gil;
+
+    Py_XDECREF(m_weakRef);
+    m_weakRef = 0;
+
+    if (!m_isMethod)
+       Py_DECREF(m_callback);
+}
+
+GlobalReceiverV2::GlobalReceiverV2(PyObject *callback, SharedMap map)
+    : QObject(0), m_metaObject(GLOBAL_RECEIVER_CLASS_NAME, &QObject::staticMetaObject), m_sharedMap(map)
+{
+    m_data = new DynamicSlotDataV2(callback, this);
+    m_metaObject.addSlot(RECEIVER_DESTROYED_SLOT_NAME);
+    m_metaObject.update();
+    m_refs.append(NULL);
+
+
+    if (DESTROY_SIGNAL_ID == 0)
+        DESTROY_SIGNAL_ID = QObject::staticMetaObject.indexOfSignal("destroyed(QObject*)");
+
+    if (DESTROY_SLOT_ID == 0)
+        DESTROY_SLOT_ID = m_metaObject.indexOfSlot(RECEIVER_DESTROYED_SLOT_NAME);
+
+
+}
+
+GlobalReceiverV2::~GlobalReceiverV2()
+{
+    m_refs.clear();
+    //Remove itself from map
+    m_sharedMap->remove(m_data->hash());
+    delete m_data;
+}
+
+int GlobalReceiverV2::addSlot(const char* signature)
+{
+    return m_data->addSlot(signature);
+}
+
+void GlobalReceiverV2::incRef(const QObject* link)
+{
+    if (link) {
+        if (!m_refs.contains(link)) {
+            if (QMetaObject::connect(link, DESTROY_SIGNAL_ID, this, DESTROY_SLOT_ID))
+                m_refs.append(link);
+            else
+                Q_ASSERT(false);
+        } else {
+            m_refs.append(link);
+        }
+    } else {
+        m_refs.append(NULL);
+    }
+}
+
+void GlobalReceiverV2::decRef(const QObject* link)
+{
+    if (m_refs.size() <= 0)
+        return;
+
+
+    m_refs.removeOne(link);
+    if (link) {
+        if (!m_refs.contains(link)) {
+            bool result = QMetaObject::disconnect(link, DESTROY_SIGNAL_ID, this, DESTROY_SLOT_ID);
+            Q_ASSERT(result);
+            if (!result)
+                return;
+        }
+    }
+
+    if (m_refs.size() == 0)
+        delete this;
+
+}
+
+int GlobalReceiverV2::refCount(const QObject* link) const
+{
+    if (link)
+        return m_refs.count(link);
+
+    return m_refs.size();
+}
+
+void GlobalReceiverV2::notify()
+{
+    QSet<const QObject*> objs = QSet<const QObject*>::fromList(m_refs);
+    foreach(const QObject* o, objs) {
+        QMetaObject::disconnect(o, DESTROY_SIGNAL_ID, this, DESTROY_SLOT_ID);
+        QMetaObject::connect(o, DESTROY_SIGNAL_ID, this, DESTROY_SLOT_ID);
+    }
+}
+
+QByteArray GlobalReceiverV2::hash() const
+{
+    return m_data->hash();
+}
+
+QByteArray GlobalReceiverV2::hash(PyObject* callback)
+{
+    return DynamicSlotDataV2::hash(callback);
+}
+
+const QMetaObject* GlobalReceiverV2::metaObject() const
+{
+    return m_metaObject.update();
+}
+
+int GlobalReceiverV2::qt_metacall(QMetaObject::Call call, int id, void** args)
+{
+    Q_ASSERT(call == QMetaObject::InvokeMetaMethod);
+    Q_ASSERT(id >= QObject::staticMetaObject.methodCount());
+
+    QMetaMethod slot = metaObject()->method(id);
+    Q_ASSERT(slot.methodType() == QMetaMethod::Slot);
+
+    if (id == DESTROY_SLOT_ID) {
+        if (m_refs.size() == 0)
+            return -1;
+        QObject *obj = *(QObject**)args[1];
+        incRef(); //keep the object live (safe ref)
+        m_refs.removeAll(obj); // remove all refs to this object
+        decRef(); //remove the safe ref
+    } else {
+        Shiboken::GilState gil;
+        PyObject* retval = 0;
+
+        bool isShortCurt = (strstr(slot.signature(), "(") == 0);
+        if (isShortCurt) {
+            retval = m_data->call(reinterpret_cast<PyObject*>(args[1]));
+        } else {
+            QList<QByteArray> paramTypes = slot.parameterTypes();
+            Shiboken::AutoDecRef preparedArgs(PyTuple_New(paramTypes.count()));
+            for (int i = 0, max = paramTypes.count(); i < max; ++i) {
+                PyObject* arg = Shiboken::TypeResolver::get(paramTypes[i].constData())->toPython(args[i+1]); // Do not increment the reference
+                PyTuple_SET_ITEM(preparedArgs.object(), i, arg);
+            }
+            retval = m_data->call(preparedArgs);
+        }
+
+        if (!retval)
+            PyErr_Print();
+        else
+            Py_DECREF(retval);
+    }
+
+    return -1;
+}