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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <memory>
// shared_ptr
// template<class T, class A, class... Args>
// shared_ptr<T> allocate_shared(const A& a, Args&&... args); // T is not an array
#include <memory>
#include <new>
#include <cstdlib>
#include <cassert>
#include "min_allocator.h"
#include "operator_hijacker.h"
#include "test_allocator.h"
#include "test_macros.h"
int new_count = 0;
struct A
{
static int count;
A(int i, char c) : int_(i), char_(c) {++count;}
A(const A& a)
: int_(a.int_), char_(a.char_)
{++count;}
~A() {--count;}
int get_int() const {return int_;}
char get_char() const {return char_;}
A* operator& () = delete;
private:
int int_;
char char_;
};
int A::count = 0;
struct Zero
{
static int count;
Zero() {++count;}
Zero(Zero const &) {++count;}
~Zero() {--count;}
};
int Zero::count = 0;
struct One
{
static int count;
int value;
explicit One(int v) : value(v) {++count;}
One(One const & o) : value(o.value) {++count;}
~One() {--count;}
};
int One::count = 0;
struct Two
{
static int count;
int value;
Two(int v, int) : value(v) {++count;}
Two(Two const & o) : value(o.value) {++count;}
~Two() {--count;}
};
int Two::count = 0;
struct Three
{
static int count;
int value;
Three(int v, int, int) : value(v) {++count;}
Three(Three const & o) : value(o.value) {++count;}
~Three() {--count;}
};
int Three::count = 0;
template<class T>
struct AllocNoConstruct : std::allocator<T>
{
AllocNoConstruct() = default;
template <class T1>
AllocNoConstruct(AllocNoConstruct<T1>) {}
template <class T1>
struct rebind {
typedef AllocNoConstruct<T1> other;
};
void construct(void*) { assert(false); }
};
template <class Alloc>
void test()
{
int const bad = -1;
{
std::shared_ptr<Zero> p = std::allocate_shared<Zero>(Alloc());
assert(Zero::count == 1);
}
assert(Zero::count == 0);
{
int const i = 42;
std::shared_ptr<One> p = std::allocate_shared<One>(Alloc(), i);
assert(One::count == 1);
assert(p->value == i);
}
assert(One::count == 0);
{
int const i = 42;
std::shared_ptr<Two> p = std::allocate_shared<Two>(Alloc(), i, bad);
assert(Two::count == 1);
assert(p->value == i);
}
assert(Two::count == 0);
{
int const i = 42;
std::shared_ptr<Three> p = std::allocate_shared<Three>(Alloc(), i, bad, bad);
assert(Three::count == 1);
assert(p->value == i);
}
assert(Three::count == 0);
}
int main(int, char**)
{
test<bare_allocator<void> >();
test<test_allocator<void> >();
test_allocator_statistics alloc_stats;
{
int i = 67;
char c = 'e';
std::shared_ptr<A> p = std::allocate_shared<A>(test_allocator<A>(54, &alloc_stats), i, c);
assert(alloc_stats.alloc_count == 1);
assert(A::count == 1);
assert(p->get_int() == 67);
assert(p->get_char() == 'e');
}
assert(A::count == 0);
assert(alloc_stats.alloc_count == 0);
{
int i = 67;
char c = 'e';
std::shared_ptr<A> p = std::allocate_shared<A>(min_allocator<void>(), i, c);
assert(A::count == 1);
assert(p->get_int() == 67);
assert(p->get_char() == 'e');
}
assert(A::count == 0);
{
int i = 68;
char c = 'f';
std::shared_ptr<A> p = std::allocate_shared<A>(bare_allocator<void>(), i, c);
assert(A::count == 1);
assert(p->get_int() == 68);
assert(p->get_char() == 'f');
}
assert(A::count == 0);
// Make sure std::allocate_shared handles badly-behaved types properly
{
std::shared_ptr<operator_hijacker> p1 = std::allocate_shared<operator_hijacker>(min_allocator<operator_hijacker>());
std::shared_ptr<operator_hijacker> p2 = std::allocate_shared<operator_hijacker>(min_allocator<operator_hijacker>(), operator_hijacker());
assert(p1 != nullptr);
assert(p2 != nullptr);
}
// Test that we don't call construct before C++20.
#if TEST_STD_VER < 20
{
(void)std::allocate_shared<int>(AllocNoConstruct<int>());
}
#endif // TEST_STD_VER < 20
return 0;
}
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