darling-libcxx/test/support/min_allocator.h
Eric Fiselier 6e9a694dce Add Filesystem TS -- Complete
Add the completed std::experimental::filesystem implementation and tests.
The implementation supports C++11 or newer.

The TS is built as part of 'libc++experimental.a'. Users of the TS need to
manually link this library. Building and testing the TS can be disabled using
the CMake option '-DLIBCXX_ENABLE_FILESYSTEM=OFF'.

Currently 'libc++experimental.a' is not installed by default. To turn on the
installation of the library use '-DLIBCXX_INSTALL_EXPERIMENTAL_LIBRARY=ON'.


git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@273034 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-17 19:46:40 +00:00

346 lines
9.4 KiB
C++

//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef MIN_ALLOCATOR_H
#define MIN_ALLOCATOR_H
#include <cstddef>
#include <cstdlib>
#include <cstddef>
#include <cassert>
#include "test_macros.h"
template <class T>
class bare_allocator
{
public:
typedef T value_type;
bare_allocator() TEST_NOEXCEPT {}
template <class U>
bare_allocator(bare_allocator<U>) TEST_NOEXCEPT {}
T* allocate(std::size_t n)
{
return static_cast<T*>(::operator new(n*sizeof(T)));
}
void deallocate(T* p, std::size_t)
{
return ::operator delete(static_cast<void*>(p));
}
friend bool operator==(bare_allocator, bare_allocator) {return true;}
friend bool operator!=(bare_allocator x, bare_allocator y) {return !(x == y);}
};
struct malloc_allocator_base {
static size_t alloc_count;
static size_t dealloc_count;
static bool disable_default_constructor;
static size_t outstanding_alloc() {
assert(alloc_count >= dealloc_count);
return (alloc_count - dealloc_count);
}
static void reset() {
assert(outstanding_alloc() == 0);
disable_default_constructor = false;
alloc_count = 0;
dealloc_count = 0;
}
};
size_t malloc_allocator_base::alloc_count = 0;
size_t malloc_allocator_base::dealloc_count = 0;
bool malloc_allocator_base::disable_default_constructor = false;
template <class T>
class malloc_allocator : public malloc_allocator_base
{
public:
typedef T value_type;
malloc_allocator() TEST_NOEXCEPT { assert(!disable_default_constructor); }
template <class U>
malloc_allocator(malloc_allocator<U>) TEST_NOEXCEPT {}
T* allocate(std::size_t n)
{
++alloc_count;
return static_cast<T*>(std::malloc(n*sizeof(T)));
}
void deallocate(T* p, std::size_t)
{
++dealloc_count;
std::free(static_cast<void*>(p));
}
friend bool operator==(malloc_allocator, malloc_allocator) {return true;}
friend bool operator!=(malloc_allocator x, malloc_allocator y) {return !(x == y);}
};
#if TEST_STD_VER >= 11
#include <memory>
template <class T> class min_pointer;
template <class T> class min_pointer<const T>;
template <> class min_pointer<void>;
template <> class min_pointer<const void>;
template <class T> class min_allocator;
template <>
class min_pointer<const void>
{
const void* ptr_;
public:
min_pointer() TEST_NOEXCEPT = default;
min_pointer(std::nullptr_t) TEST_NOEXCEPT : ptr_(nullptr) {}
template <class T>
min_pointer(min_pointer<T> p) TEST_NOEXCEPT : ptr_(p.ptr_) {}
explicit operator bool() const {return ptr_ != nullptr;}
friend bool operator==(min_pointer x, min_pointer y) {return x.ptr_ == y.ptr_;}
friend bool operator!=(min_pointer x, min_pointer y) {return !(x == y);}
template <class U> friend class min_pointer;
};
template <>
class min_pointer<void>
{
void* ptr_;
public:
min_pointer() TEST_NOEXCEPT = default;
min_pointer(std::nullptr_t) TEST_NOEXCEPT : ptr_(nullptr) {}
template <class T,
class = typename std::enable_if
<
!std::is_const<T>::value
>::type
>
min_pointer(min_pointer<T> p) TEST_NOEXCEPT : ptr_(p.ptr_) {}
explicit operator bool() const {return ptr_ != nullptr;}
friend bool operator==(min_pointer x, min_pointer y) {return x.ptr_ == y.ptr_;}
friend bool operator!=(min_pointer x, min_pointer y) {return !(x == y);}
template <class U> friend class min_pointer;
};
template <class T>
class min_pointer
{
T* ptr_;
explicit min_pointer(T* p) TEST_NOEXCEPT : ptr_(p) {}
public:
min_pointer() TEST_NOEXCEPT = default;
min_pointer(std::nullptr_t) TEST_NOEXCEPT : ptr_(nullptr) {}
explicit min_pointer(min_pointer<void> p) TEST_NOEXCEPT : ptr_(static_cast<T*>(p.ptr_)) {}
explicit operator bool() const {return ptr_ != nullptr;}
typedef std::ptrdiff_t difference_type;
typedef T& reference;
typedef T* pointer;
typedef T value_type;
typedef std::random_access_iterator_tag iterator_category;
reference operator*() const {return *ptr_;}
pointer operator->() const {return ptr_;}
min_pointer& operator++() {++ptr_; return *this;}
min_pointer operator++(int) {min_pointer tmp(*this); ++ptr_; return tmp;}
min_pointer& operator--() {--ptr_; return *this;}
min_pointer operator--(int) {min_pointer tmp(*this); --ptr_; return tmp;}
min_pointer& operator+=(difference_type n) {ptr_ += n; return *this;}
min_pointer& operator-=(difference_type n) {ptr_ -= n; return *this;}
min_pointer operator+(difference_type n) const
{
min_pointer tmp(*this);
tmp += n;
return tmp;
}
friend min_pointer operator+(difference_type n, min_pointer x)
{
return x + n;
}
min_pointer operator-(difference_type n) const
{
min_pointer tmp(*this);
tmp -= n;
return tmp;
}
friend difference_type operator-(min_pointer x, min_pointer y)
{
return x.ptr_ - y.ptr_;
}
reference operator[](difference_type n) const {return ptr_[n];}
friend bool operator< (min_pointer x, min_pointer y) {return x.ptr_ < y.ptr_;}
friend bool operator> (min_pointer x, min_pointer y) {return y < x;}
friend bool operator<=(min_pointer x, min_pointer y) {return !(y < x);}
friend bool operator>=(min_pointer x, min_pointer y) {return !(x < y);}
static min_pointer pointer_to(T& t) {return min_pointer(std::addressof(t));}
friend bool operator==(min_pointer x, min_pointer y) {return x.ptr_ == y.ptr_;}
friend bool operator!=(min_pointer x, min_pointer y) {return !(x == y);}
template <class U> friend class min_pointer;
template <class U> friend class min_allocator;
};
template <class T>
class min_pointer<const T>
{
const T* ptr_;
explicit min_pointer(const T* p) : ptr_(p) {}
public:
min_pointer() TEST_NOEXCEPT = default;
min_pointer(std::nullptr_t) : ptr_(nullptr) {}
min_pointer(min_pointer<T> p) : ptr_(p.ptr_) {}
explicit min_pointer(min_pointer<const void> p) : ptr_(static_cast<const T*>(p.ptr_)) {}
explicit operator bool() const {return ptr_ != nullptr;}
typedef std::ptrdiff_t difference_type;
typedef const T& reference;
typedef const T* pointer;
typedef const T value_type;
typedef std::random_access_iterator_tag iterator_category;
reference operator*() const {return *ptr_;}
pointer operator->() const {return ptr_;}
min_pointer& operator++() {++ptr_; return *this;}
min_pointer operator++(int) {min_pointer tmp(*this); ++ptr_; return tmp;}
min_pointer& operator--() {--ptr_; return *this;}
min_pointer operator--(int) {min_pointer tmp(*this); --ptr_; return tmp;}
min_pointer& operator+=(difference_type n) {ptr_ += n; return *this;}
min_pointer& operator-=(difference_type n) {ptr_ -= n; return *this;}
min_pointer operator+(difference_type n) const
{
min_pointer tmp(*this);
tmp += n;
return tmp;
}
friend min_pointer operator+(difference_type n, min_pointer x)
{
return x + n;
}
min_pointer operator-(difference_type n) const
{
min_pointer tmp(*this);
tmp -= n;
return tmp;
}
friend difference_type operator-(min_pointer x, min_pointer y)
{
return x.ptr_ - y.ptr_;
}
reference operator[](difference_type n) const {return ptr_[n];}
friend bool operator< (min_pointer x, min_pointer y) {return x.ptr_ < y.ptr_;}
friend bool operator> (min_pointer x, min_pointer y) {return y < x;}
friend bool operator<=(min_pointer x, min_pointer y) {return !(y < x);}
friend bool operator>=(min_pointer x, min_pointer y) {return !(x < y);}
static min_pointer pointer_to(const T& t) {return min_pointer(std::addressof(t));}
friend bool operator==(min_pointer x, min_pointer y) {return x.ptr_ == y.ptr_;}
friend bool operator!=(min_pointer x, min_pointer y) {return !(x == y);}
template <class U> friend class min_pointer;
};
template <class T>
inline
bool
operator==(min_pointer<T> x, std::nullptr_t)
{
return !static_cast<bool>(x);
}
template <class T>
inline
bool
operator==(std::nullptr_t, min_pointer<T> x)
{
return !static_cast<bool>(x);
}
template <class T>
inline
bool
operator!=(min_pointer<T> x, std::nullptr_t)
{
return static_cast<bool>(x);
}
template <class T>
inline
bool
operator!=(std::nullptr_t, min_pointer<T> x)
{
return static_cast<bool>(x);
}
template <class T>
class min_allocator
{
public:
typedef T value_type;
typedef min_pointer<T> pointer;
min_allocator() = default;
template <class U>
min_allocator(min_allocator<U>) {}
pointer allocate(std::ptrdiff_t n)
{
return pointer(static_cast<T*>(::operator new(n*sizeof(T))));
}
void deallocate(pointer p, std::ptrdiff_t)
{
return ::operator delete(p.ptr_);
}
friend bool operator==(min_allocator, min_allocator) {return true;}
friend bool operator!=(min_allocator x, min_allocator y) {return !(x == y);}
};
#endif // TEST_STD_VER >= 11
#endif // MIN_ALLOCATOR_H