[telepathy-qt4/master] Added SharedData/SharedPtr/WeakPtr classes.
Andre Moreira Magalhaes (andrunko)
andre.magalhaes at collabora.co.uk
Mon Mar 30 13:05:48 PDT 2009
---
TelepathyQt4/Makefile.am | 2 +
TelepathyQt4/SharedPtr | 13 +++
TelepathyQt4/shared-ptr.h | 229 +++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 244 insertions(+), 0 deletions(-)
create mode 100644 TelepathyQt4/SharedPtr
create mode 100644 TelepathyQt4/shared-ptr.h
diff --git a/TelepathyQt4/Makefile.am b/TelepathyQt4/Makefile.am
index 8af8617..d80686c 100644
--- a/TelepathyQt4/Makefile.am
+++ b/TelepathyQt4/Makefile.am
@@ -128,11 +128,13 @@ tpqt4include_HEADERS = \
Debug \
KeyFile \
ManagerFile \
+ SharedPtr \
Types \
constants.h \
debug.h \
key-file.h \
manager-file.h \
+ shared-ptr.h \
types.h
tpqt4clientinclude_HEADERS = \
diff --git a/TelepathyQt4/SharedPtr b/TelepathyQt4/SharedPtr
new file mode 100644
index 0000000..0ff96a4
--- /dev/null
+++ b/TelepathyQt4/SharedPtr
@@ -0,0 +1,13 @@
+#ifndef _TelepathyQt4_SharedPtr_HEADER_GUARD_
+#define _TelepathyQt4_SharedPtr_HEADER_GUARD_
+
+#ifndef IN_TELEPATHY_QT4_HEADER
+#define IN_TELEPATHY_QT4_HEADER
+#endif
+
+#include <TelepathyQt4/shared-ptr.h>
+
+#undef IN_TELEPATHY_QT4_HEADER
+
+#endif
+// vim:set ft=cpp:
diff --git a/TelepathyQt4/shared-ptr.h b/TelepathyQt4/shared-ptr.h
new file mode 100644
index 0000000..9038032
--- /dev/null
+++ b/TelepathyQt4/shared-ptr.h
@@ -0,0 +1,229 @@
+/*
+ * This file is part of TelepathyQt4
+ *
+ * Copyright (C) 2009 Collabora Ltd. <http://www.collabora.co.uk/>
+ * Copyright (C) 2009 Nokia Corporation
+ *
+ * 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 St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#ifndef _TelepathyQt4_shared_ptr_h_HEADER_GUARD_
+#define _TelepathyQt4_shared_ptr_h_HEADER_GUARD_
+
+#ifndef IN_TELEPATHY_QT4_HEADER
+#error IN_TELEPATHY_QT4_HEADER
+#endif
+
+#include <QObject>
+
+namespace Telepathy
+{
+
+class SharedData;
+class WeakData;
+template <class T> class SharedPtr;
+template <class T> class WeakPtr;
+
+class WeakData
+{
+ Q_DISABLE_COPY(WeakData)
+
+public:
+ WeakData(SharedData *d) : d(d), weakref(0) { }
+
+ SharedData *d;
+ mutable QAtomicInt weakref;
+};
+
+class SharedData
+{
+ Q_DISABLE_COPY(SharedData)
+
+public:
+ inline SharedData() : strongref(0), wd(0) { }
+ inline ~SharedData() { if (wd) { wd->d = 0; } }
+
+ inline void ref() { strongref.ref(); }
+ inline bool deref() { return strongref.deref(); }
+
+ mutable QAtomicInt strongref;
+ WeakData *wd;
+};
+
+template <class T>
+class SharedPtr
+{
+public:
+ inline SharedPtr() : d(0) { }
+ inline SharedPtr(T *d) : d(d) { if (d) { d->ref(); } }
+ inline SharedPtr(const SharedPtr<T> &o) : d(o.d) { if (d) { d->ref(); } }
+ template<class X>
+ inline SharedPtr(const SharedPtr<X> &o) : d(static_cast<T *>(o.data())) { if (d) { d->ref(); } }
+ inline SharedPtr(const WeakPtr<T> &o)
+ {
+ if (o.wd && o.wd->d) {
+ d = static_cast<T*>(o.wd->d);
+ d->ref();
+ } else {
+ d = 0;
+ }
+ }
+ inline ~SharedPtr()
+ {
+ if (d && !d->deref()) {
+ delete d;
+ }
+ }
+
+ inline void reset()
+ {
+ if (d && !d->deref()) {
+ delete d;
+ }
+ d = 0;
+ }
+
+ inline T *data() const { return d; }
+ inline const T *constData() const { return d; }
+ inline T *operator->() { return d; }
+ inline T *operator->() const { return d; }
+
+ inline bool isNull() const { return !d; }
+ inline operator bool() const { return !isNull(); }
+ inline bool operator!() const { return isNull(); }
+
+ inline bool operator==(const SharedPtr<T> &o) const { return d == o.d; }
+ inline bool operator!=(const SharedPtr<T> &o) const { return d != o.d; }
+ inline bool operator==(const T *ptr) const { return d == ptr; }
+ inline bool operator!=(const T *ptr) const { return d != ptr; }
+
+ inline SharedPtr<T> &operator=(const SharedPtr<T> &o)
+ {
+ if (o.d != d) {
+ if (o.d) {
+ o.d->ref();
+ }
+ if (d && !d->deref()) {
+ delete d;
+ }
+ d = o.d;
+ }
+ return *this;
+ }
+
+ inline SharedPtr<T> &operator=(const WeakPtr<T> &o)
+ {
+ if (o.wd) {
+ if (o.wd->d != d) {
+ if (d && !d->deref()) {
+ delete d;
+ }
+ if (o.wd->d) {
+ o.wd->d->ref();
+ }
+ d = static_cast<T*>(o.wd->d);
+ }
+ } else {
+ d = 0;
+ }
+ return *this;
+ }
+
+
+private:
+ friend class WeakPtr<T>;
+
+ T *d;
+};
+
+template <class T>
+class WeakPtr
+{
+public:
+ inline WeakPtr(const WeakPtr<T> &o) : wd(o.wd) { if (wd) { wd->weakref.ref(); } }
+ inline WeakPtr(const SharedPtr<T> &o)
+ {
+ if (o.d) {
+ if (!o.d->wd) {
+ o.d->wd = new WeakData(o.d);
+ }
+ wd = o.d->wd;
+ wd->weakref.ref();
+ } else {
+ wd = 0;
+ }
+ }
+ inline ~WeakPtr()
+ {
+ if (wd && !wd->weakref.deref()) {
+ if (wd->d) {
+ wd->d->wd = 0;
+ delete wd;
+ }
+ }
+ }
+
+ inline bool isNull() const { return !wd || !wd->d || wd->d->strongref == 0; }
+ inline operator bool() const { return !isNull(); }
+ inline bool operator!() const { return isNull(); }
+
+ inline WeakPtr<T> &operator=(const WeakPtr<T> &o)
+ {
+ if (o.wd != wd) {
+ if (o.wd) {
+ o.wd->weakref.ref();
+ }
+ if (wd && !wd->weakref.deref()) {
+ if (wd->d) {
+ wd->d->wd = 0;
+ delete wd;
+ }
+ }
+ wd = o.wd;
+ }
+ return *this;
+ }
+
+ inline WeakPtr<T> &operator=(const SharedPtr<T> &o)
+ {
+ if (o.d) {
+ if (o.d->wd != wd) {
+ if (!o.d->wd) {
+ o.d->wd = new WeakData(o.d);
+ }
+ o.d->wd->weakref.ref();
+ if (wd && !wd->weakref.deref()) {
+ if (wd->d) {
+ wd->d->wd = 0;
+ delete wd;
+ }
+ }
+ wd = o.d->wd;
+ }
+ } else {
+ wd = 0;
+ }
+ return *this;
+ }
+
+private:
+ friend class SharedPtr<T>;
+
+ WeakData *wd;
+};
+
+} // Telepathy
+
+#endif
--
1.5.6.5
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