6db4e1896a
Applies existing fix to array allocation, Adds a test case, Adds a fallback mechanism, so that if allocation fails we shrink the next chunk size. Refs #2696. [SVN r69236]
67 lines
1.8 KiB
C++
67 lines
1.8 KiB
C++
/* Copyright (C) 2011 John Maddock
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*
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* Use, modification and distribution is subject to the
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* Boost Software License, Version 1.0. (See accompanying
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* file LICENSE_1_0.txt or http://www.boost.org/LICENSE_1_0.txt)
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*/
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// Test of bug #1252 (https://svn.boost.org/trac/boost/ticket/1252)
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#include <boost/pool/pool.hpp>
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#include <boost/detail/lightweight_test.hpp>
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#include <boost/type_traits/alignment_of.hpp>
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#include <cstring>
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struct limited_allocator_new_delete
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{
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typedef std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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static char * malloc BOOST_PREVENT_MACRO_SUBSTITUTION(const size_type bytes)
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{
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if(bytes > 1510 * 32)
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return 0;
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return new (std::nothrow) char[bytes];
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}
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static void free BOOST_PREVENT_MACRO_SUBSTITUTION(char * const block)
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{
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delete [] block;
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}
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};
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template <class T>
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void test_alignment(T)
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{
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unsigned align = boost::alignment_of<T>::value;
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boost::pool<> p(sizeof(T));
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unsigned limit = 100000;
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for(unsigned i = 0; i < limit; ++i)
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{
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void* ptr = (p.malloc)();
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BOOST_TEST(reinterpret_cast<std::size_t>(ptr) % align == 0);
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// Trample over the memory just to be sure the allocated block is big enough,
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// if it's not, we'll trample over the next block as well (and our internal housekeeping).
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std::memset(ptr, 0xff, sizeof(T));
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}
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}
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int main()
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{
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boost::pool<limited_allocator_new_delete> po(1501);
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void* p = (po.malloc)();
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BOOST_TEST(p != 0);
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test_alignment(char(0));
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test_alignment(short(0));
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test_alignment(int(0));
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test_alignment(long(0));
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test_alignment(double(0));
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test_alignment(float(0));
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test_alignment((long double)(0));
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#ifndef BOOST_NO_LONG_LONG
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test_alignment((long long)(0));
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#endif
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return boost::report_errors();
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}
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