81 lines
2.3 KiB
C++
81 lines
2.3 KiB
C++
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// -*- mode: C++; c-indent-level: 4; c-basic-offset: 4; tab-width: 8 -*-
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//
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// XPtr.cpp: Rcpp R/C++ interface class library -- external pointer unit tests
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//
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// Copyright (C) 2013 Dirk Eddelbuettel and Romain Francois
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//
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// This file is part of Rcpp.
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//
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// Rcpp is free software: you can redistribute it and/or modify it
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// under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 2 of the License, or
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// (at your option) any later version.
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//
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// Rcpp is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Rcpp. If not, see <http://www.gnu.org/licenses/>.
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#include <Rcpp.h>
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using namespace Rcpp ;
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// [[Rcpp::export]]
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XPtr< std::vector<int> > xptr_1(){
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/* creating a pointer to a vector<int> */
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std::vector<int>* v = new std::vector<int> ;
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v->push_back( 1 ) ;
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v->push_back( 2 ) ;
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/* wrap the pointer as an external pointer */
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/* this automatically protected the external pointer from R garbage
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collection until p goes out of scope. */
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XPtr< std::vector<int> > p(v) ;
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/* return it back to R, since p goes out of scope after the return
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the external pointer is no more protected by p, but it gets
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protected by being on the R side */
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return( p ) ;
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}
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// [[Rcpp::export]]
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int xptr_2( XPtr< std::vector<int> > p){
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/* just return the front of the vector as a SEXP */
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return p->front() ;
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}
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// [[Rcpp::export]]
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void xptr_self_tag( XPtr< std::vector<int> > p ){
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XPtr< std::vector<int> > self_tag(wrap(p), wrap(p), R_NilValue) ;
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}
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// [[Rcpp::export]]
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bool xptr_has_self_tag( XPtr< std::vector<int> > p ){
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return wrap(p) == R_ExternalPtrTag(p);
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}
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// [[Rcpp::export]]
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bool xptr_release( XPtr< std::vector<int> > p) {
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p.release();
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return !p;
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}
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// [[Rcpp::export]]
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bool xptr_access_released( XPtr< std::vector<int> > p) {
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// double-release should be a no-op
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p.release();
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// get should return NULL
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return p.get() == NULL;
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}
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// [[Rcpp::export]]
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int xptr_use_released( XPtr< std::vector<int> > p ) {
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return p->front();
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}
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