1// 2004-10-10 Paolo Carlini <pcarlini@suse.de> 2 3// Copyright (C) 2004 Free Software Foundation, Inc. 4// 5// This file is part of the GNU ISO C++ Library. This library is free 6// software; you can redistribute it and/or modify it under the 7// terms of the GNU General Public License as published by the 8// Free Software Foundation; either version 2, or (at your option) 9// any later version. 10// 11// This library is distributed in the hope that it will be useful, 12// but WITHOUT ANY WARRANTY; without even the implied warranty of 13// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14// GNU General Public License for more details. 15// 16// You should have received a copy of the GNU General Public License along 17// with this library; see the file COPYING. If not, write to the Free 18// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 19// USA. 20 21// 20.4.1.1 allocator members 22 23#include <ext/pool_allocator.h> 24 25struct small 26{ 27 char c[16]; 28}; 29 30struct big 31{ 32 char c[64]; 33}; 34 35void* 36operator new(size_t n) throw(std::bad_alloc) 37{ 38 static bool first = true; 39 if (!first) 40 throw std::bad_alloc(); 41 first = false; 42 return std::malloc(n); 43} 44 45// http://gcc.gnu.org/ml/libstdc++/2004-10/msg00098.html 46void test01() 47{ 48 using __gnu_cxx::__pool_alloc; 49 50 __pool_alloc<big> alloc_big; 51 alloc_big.allocate(1); 52 53 // The constant 20 comes from __pool_alloc_base::_M_refill. See 54 // also __pool_alloc_base::_M_allocate_chunk. 55 __pool_alloc<small> alloc_small; 56 for (unsigned int i = 0; i < 20 * sizeof(big) / sizeof(small) + 1; ++i) 57 alloc_small.allocate(1); 58} 59 60int main() 61{ 62 test01(); 63} 64