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Implement P0040r3: Extending memory management tools
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@276544 91177308-0d34-0410-b5e6-96231b3b80d8
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <memory>
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// template <class ForwardIt>
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// void uninitialized_default_construct(ForwardIt, ForwardIt);
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#include <memory>
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#include <cstdlib>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "test_throw.h"
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struct Counted {
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static int count;
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static int constructed;
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static void reset() { count = constructed = 0; }
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explicit Counted() { ++count; ++constructed; }
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Counted(Counted const&) { assert(false); }
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~Counted() { --count; }
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friend void operator&(Counted) = delete;
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};
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int Counted::count = 0;
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int Counted::constructed = 0;
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struct ThrowsCounted {
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static int count;
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static int constructed;
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static int throw_after;
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static void reset() { throw_after = count = constructed = 0; }
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explicit ThrowsCounted() {
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++constructed;
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if (throw_after > 0 && --throw_after == 0) {
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test_throw<int>();
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}
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++count;
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}
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ThrowsCounted(ThrowsCounted const&) { assert(false); }
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~ThrowsCounted() { --count; }
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friend void operator&(ThrowsCounted) = delete;
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};
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int ThrowsCounted::count = 0;
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int ThrowsCounted::constructed = 0;
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int ThrowsCounted::throw_after = 0;
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void test_ctor_throws()
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{
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#ifndef TEST_HAS_NO_EXCEPTIONS
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using It = forward_iterator<ThrowsCounted*>;
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const int N = 5;
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alignas(ThrowsCounted) char pool[sizeof(ThrowsCounted)*N] = {};
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ThrowsCounted* p = (ThrowsCounted*)pool;
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try {
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ThrowsCounted::throw_after = 4;
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std::uninitialized_default_construct(It(p), It(p+N));
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assert(false);
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} catch (...) {}
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assert(ThrowsCounted::count == 3);
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assert(ThrowsCounted::constructed == 4); // forth construction throws
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std::destroy(p, p+3);
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assert(ThrowsCounted::count == 0);
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#endif
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}
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void test_counted()
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{
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using It = forward_iterator<Counted*>;
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const int N = 5;
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alignas(Counted) char pool[sizeof(Counted)*N] = {};
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Counted* p = (Counted*)pool;
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std::uninitialized_default_construct(It(p), It(p+1));
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assert(Counted::count == 1);
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assert(Counted::constructed = 1);
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std::uninitialized_default_construct(It(p+1), It(p+N));
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assert(Counted::count == 5);
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assert(Counted::constructed == 5);
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std::destroy(p, p+N);
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assert(Counted::count == 0);
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}
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void test_value_initialized()
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{
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using It = forward_iterator<int*>;
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const int N = 5;
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int pool[N] = {-1, -1, -1, -1, -1};
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int* p = pool;
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std::uninitialized_default_construct(It(p), It(p+1));
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assert(pool[0] == -1);
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assert(pool[1] == -1);
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std::uninitialized_default_construct(It(p+1), It(p+N));
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assert(pool[1] == -1);
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assert(pool[2] == -1);
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assert(pool[3] == -1);
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assert(pool[4] == -1);
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}
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int main()
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{
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test_counted();
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test_value_initialized();
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test_ctor_throws();
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}
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@@ -0,0 +1,119 @@
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//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11, c++14
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// <memory>
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// template <class ForwardIt>
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// void uninitialized_default_construct(ForwardIt, ForwardIt);
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#include <memory>
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#include <cstdlib>
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#include <cassert>
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "test_throw.h"
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struct Counted {
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static int count;
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static int constructed;
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static void reset() { count = constructed = 0; }
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explicit Counted() { ++count; ++constructed; }
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Counted(Counted const&) { assert(false); }
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~Counted() { --count; }
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friend void operator&(Counted) = delete;
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};
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int Counted::count = 0;
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int Counted::constructed = 0;
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struct ThrowsCounted {
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static int count;
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static int constructed;
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static int throw_after;
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static void reset() { throw_after = count = constructed = 0; }
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explicit ThrowsCounted() {
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++constructed;
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if (throw_after > 0 && --throw_after == 0) {
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test_throw<int>();
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}
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++count;
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}
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ThrowsCounted(ThrowsCounted const&) { assert(false); }
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~ThrowsCounted() { --count; }
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friend void operator&(ThrowsCounted) = delete;
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};
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int ThrowsCounted::count = 0;
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int ThrowsCounted::constructed = 0;
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int ThrowsCounted::throw_after = 0;
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void test_ctor_throws()
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{
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#ifndef TEST_HAS_NO_EXCEPTIONS
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using It = forward_iterator<ThrowsCounted*>;
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const int N = 5;
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alignas(ThrowsCounted) char pool[sizeof(ThrowsCounted)*N] = {};
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ThrowsCounted* p = (ThrowsCounted*)pool;
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try {
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ThrowsCounted::throw_after = 4;
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std::uninitialized_default_construct_n(It(p), N);
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assert(false);
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} catch (...) {}
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assert(ThrowsCounted::count == 3);
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assert(ThrowsCounted::constructed == 4); // forth construction throws
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std::destroy(p, p+3);
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assert(ThrowsCounted::count == 0);
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#endif
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}
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void test_counted()
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{
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using It = forward_iterator<Counted*>;
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const int N = 5;
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alignas(Counted) char pool[sizeof(Counted)*N] = {};
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Counted* p = (Counted*)pool;
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It e = std::uninitialized_default_construct_n(It(p), 1);
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assert(e == It(p+1));
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assert(Counted::count == 1);
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assert(Counted::constructed = 1);
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e = std::uninitialized_default_construct_n(It(p+1), 4);
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assert(e == It(p+N));
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assert(Counted::count == 5);
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assert(Counted::constructed == 5);
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std::destroy(p, p+N);
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assert(Counted::count == 0);
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}
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void test_value_initialized()
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{
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using It = forward_iterator<int*>;
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const int N = 5;
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int pool[N] = {-1, -1, -1, -1, -1};
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int* p = pool;
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auto e = std::uninitialized_default_construct_n(It(p), 1);
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assert(e == It(p+1));
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assert(pool[0] == -1);
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assert(pool[1] == -1);
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e = std::uninitialized_default_construct_n(It(p+1), 4);
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assert(e == It(p+N));
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assert(pool[1] == -1);
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assert(pool[2] == -1);
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assert(pool[3] == -1);
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assert(pool[4] == -1);
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}
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int main()
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{
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test_counted();
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test_value_initialized();
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test_ctor_throws();
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}
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