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/*
* Copyright (C) 2010 Google Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Google Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "wtf/Assertions.h"
#include "wtf/ContainerAnnotations.h"
#include "wtf/PassRefPtr.h"
#include "wtf/RefCounted.h"
#include "wtf/RefPtr.h"
#include "wtf/ThreadRestrictionVerifier.h"
#include "wtf/Vector.h"
#include "wtf/text/AtomicString.h"
#include "wtf/text/WTFString.h"
#include <memory>
namespace WTF {
#if DCHECK_IS_ON() || ENABLE(SECURITY_ASSERT)
// The debug/assertion version may get bigger.
struct SameSizeAsRefCounted {
int a;
#if ENABLE(SECURITY_ASSERT)
bool b;
#endif
#if DCHECK_IS_ON()
bool c;
ThreadRestrictionVerifier d;
#endif
};
#else
struct SameSizeAsRefCounted {
int a;
// Don't add anything here because this should stay small.
};
#endif
template <typename T, unsigned inlineCapacity = 0>
struct SameSizeAsVectorWithInlineCapacity;
template <typename T>
struct SameSizeAsVectorWithInlineCapacity<T, 0> {
void* bufferPointer;
unsigned capacity;
unsigned size;
};
template <typename T, unsigned inlineCapacity>
struct SameSizeAsVectorWithInlineCapacity {
SameSizeAsVectorWithInlineCapacity<T, 0> baseCapacity;
#if !defined(ANNOTATE_CONTIGUOUS_CONTAINER)
AlignedBuffer<inlineCapacity * sizeof(T), WTF_ALIGN_OF(T)> inlineBuffer;
#endif
};
static_assert(sizeof(std::unique_ptr<int>) == sizeof(int*),
"std::unique_ptr should stay small");
static_assert(sizeof(PassRefPtr<RefCounted<int>>) == sizeof(int*),
"PassRefPtr should stay small");
static_assert(sizeof(RefCounted<int>) == sizeof(SameSizeAsRefCounted),
"RefCounted should stay small");
static_assert(sizeof(RefPtr<RefCounted<int>>) == sizeof(int*),
"RefPtr should stay small");
static_assert(sizeof(String) == sizeof(int*), "String should stay small");
static_assert(sizeof(AtomicString) == sizeof(String),
"AtomicString should stay small");
static_assert(sizeof(Vector<int>) ==
sizeof(SameSizeAsVectorWithInlineCapacity<int>),
"Vector should stay small");
static_assert(sizeof(Vector<int, 1>) ==
sizeof(SameSizeAsVectorWithInlineCapacity<int, 1>),
"Vector should stay small");
static_assert(sizeof(Vector<int, 2>) ==
sizeof(SameSizeAsVectorWithInlineCapacity<int, 2>),
"Vector should stay small");
static_assert(sizeof(Vector<int, 3>) ==
sizeof(SameSizeAsVectorWithInlineCapacity<int, 3>),
"Vector should stay small");
} // namespace WTF
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