/* Copyright (C) 2015 Srivats P. This file is part of "Ostinato" This is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see */ #ifndef _SHARED_PROTOBUF_MESSAGE_H #define _SHARED_PROTOBUF_MESSAGE_H #include #include // TODO: Use QSharedPointer instead once the minimum Qt version becomes >= 4.5 template class SharedPointer { public: SharedPointer(T *ptr = 0) : ptr_(ptr) { mutex_ = new QMutex(); refCnt_ = new unsigned int; *refCnt_ = 1; qDebug("sharedptr %p(constr) refcnt %p(%u)", this, refCnt_, *refCnt_); } ~SharedPointer() { mutex_->lock(); (*refCnt_)--; if (*refCnt_ == 0) { delete ptr_; delete refCnt_; mutex_->unlock(); delete mutex_; qDebug("sharedptr %p destroyed", this); return; } qDebug("sharedptr %p(destr) refcnt %p(%u)", this, refCnt_, *refCnt_); mutex_->unlock(); } SharedPointer(const SharedPointer &other) { ptr_ = other.ptr_; refCnt_ = other.refCnt_; mutex_ = other.mutex_; mutex_->lock(); (*refCnt_)++; qDebug("sharedptr %p(copy) refcnt %p(%u)", this, refCnt_,*refCnt_); mutex_->unlock(); } T* operator->() const { return ptr_; } protected: T *ptr_; // use uint+mutex to simulate a QAtomicInt unsigned int *refCnt_; QMutex *mutex_; }; typedef class SharedPointer< ::google::protobuf::Message> SharedProtobufMessage; #endif