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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libstdc++-v3/] [testsuite/] [29_atomics/] [atomic/] [operators/] [51811.cc] - Rev 742
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// { dg-require-atomic-builtins "" } // { dg-options "-std=gnu++0x" } // Copyright (C) 2012 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library 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, 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 General Public License for more details. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. #include <atomic> #include <cstdlib> //std::abs #include <testsuite_hooks.h> // libstdc++/51811 // pointer arithimetic vs. atomic<_Tp*> specialization int main(void) { bool test __attribute__((unused)) = true; using namespace std; typedef int value_type; const size_t n = 2; value_type value = 42; atomic<value_type*> p, p2, p3; // operator++ { p = &value; p2 = p++; VERIFY (p != p2); value_type* vp(p); value_type* vp2(p2); ptrdiff_t dist = reinterpret_cast<char*>(vp) - reinterpret_cast<char*>(vp2); VERIFY ( std::abs(dist) == sizeof(value_type)); p = &value; p3 = ++p; VERIFY (p == p3); } // operator-- { p = &value; p2 = p--; VERIFY (p != p2); value_type* vp(p); value_type* vp2(p2); ptrdiff_t dist = reinterpret_cast<char*>(vp) - reinterpret_cast<char*>(vp2); VERIFY ( std::abs(dist) == sizeof(value_type)); p = &value; p3 = --p; VERIFY (p == p3); } // operator+= { p = &value; value_type* vp(p); p+=n; value_type* vp2(p); ptrdiff_t dist = reinterpret_cast<char*>(vp) - reinterpret_cast<char*>(vp2); VERIFY ( std::abs(dist) == sizeof(value_type) * n); } // operator-= { p = &value; value_type* vp(p); p-=n; value_type* vp2(p); ptrdiff_t dist = reinterpret_cast<char*>(vp) - reinterpret_cast<char*>(vp2); VERIFY ( std::abs(dist) == sizeof(value_type) * n); } return 0; }