1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // #include <memory> 11 12 // void* align(size_t alignment, size_t size, void*& ptr, size_t& space); 13 14 #include <memory> 15 #include <cassert> 16 17 int main() 18 { 19 const unsigned N = 20; 20 char buf[N]; 21 void* r; 22 void* p = &buf[0]; 23 std::size_t s = N; 24 r = std::align(4, 10, p, s); 25 assert(p == &buf[0]); 26 assert(r == p); 27 assert(s == N); 28 29 p = &buf[1]; 30 s = N; 31 r = std::align(4, 10, p, s); 32 assert(p == &buf[4]); 33 assert(r == p); 34 assert(s == N-3); 35 36 p = &buf[2]; 37 s = N; 38 r = std::align(4, 10, p, s); 39 assert(p == &buf[4]); 40 assert(r == p); 41 assert(s == N-2); 42 43 p = &buf[3]; 44 s = N; 45 r = std::align(4, 10, p, s); 46 assert(p == &buf[4]); 47 assert(r == p); 48 assert(s == N-1); 49 50 p = &buf[4]; 51 s = N; 52 r = std::align(4, 10, p, s); 53 assert(p == &buf[4]); 54 assert(r == p); 55 assert(s == N); 56 57 p = &buf[0]; 58 s = N; 59 r = std::align(4, N, p, s); 60 assert(p == &buf[0]); 61 assert(r == p); 62 assert(s == N); 63 64 p = &buf[1]; 65 s = N-1; 66 r = std::align(4, N-4, p, s); 67 assert(p == &buf[4]); 68 assert(r == p); 69 assert(s == N-4); 70 71 p = &buf[1]; 72 s = N-1; 73 r = std::align(4, N-3, p, s); 74 assert(p == &buf[1]); 75 assert(r == nullptr); 76 assert(s == N-1); 77 78 p = &buf[0]; 79 s = N; 80 r = std::align(1, N+1, p, s); 81 assert(p == &buf[0]); 82 assert(r == nullptr); 83 assert(s == N); 84 } 85
