1 // { dg-options " -std=gnu++11 " } 2 3 // 2014-04-16 Rüdiger Sonderfeld <ruediger@c-plusplus.de> 4 5 // Copyright (C) 2014-2016 Free Software Foundation, Inc. 6 // 7 // This file is part of the GNU ISO C++ Library. This library is free 8 // software; you can redistribute it and/or modify it under the terms 9 // of the GNU General Public License as published by the Free Software 10 // Foundation; either version 3, or (at your option) any later 11 // version. 12 13 // This library is distributed in the hope that it will be useful, but 14 // WITHOUT ANY WARRANTY; without even the implied warranty of 15 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 // General Public License for more details. 17 18 // You should have received a copy of the GNU General Public License 19 // along with this library; see the file COPYING3. If not see 20 // <http://www.gnu.org/licenses/>. 21 22 // C++11 [ptr.align] (20.6.5): std::align 23 24 // { dg-require-cstdint "" } 25 26 #include <memory> 27 #include <cstdint> 28 #include <testsuite_hooks.h> 29 30 void test01()31test01() 32 { 33 bool test __attribute__((unused)) = true; 34 35 size_t space = 100; 36 void* ptr = new char[space]; 37 char* const orig_ptr = static_cast<char*>(ptr); 38 char* old_ptr = orig_ptr; 39 const size_t orig_space = space; 40 size_t old_space = space; 41 const size_t alignment = 16; 42 const size_t size = 10; 43 while( void* const r = std::align(alignment, size, ptr, space) ) 44 { 45 VERIFY( r == ptr ); 46 uintptr_t p = reinterpret_cast<uintptr_t>(ptr); 47 VERIFY( p % alignment == 0 ); 48 char* const x = static_cast<char*>(ptr); 49 VERIFY( x - old_ptr == old_space - space ); 50 VERIFY( (void*)x < (void*)(orig_ptr + orig_space) ); 51 VERIFY( (void*)(x + size) < (void*)(orig_ptr + orig_space) ); 52 ptr = x + size; 53 old_ptr = x; 54 old_space = space; 55 space -= size; 56 } 57 delete [] orig_ptr; 58 } 59 main()60int main() 61 { 62 test01(); 63 } 64