chromium/third_party/angle/src/common/hash_utils.h

//
// Copyright 2018 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// hash_utils.h: Hashing based helper functions.

#ifndef COMMON_HASHUTILS_H_
#define COMMON_HASHUTILS_H_

#include "common/debug.h"
#include "xxhash.h"

namespace angle
{
// Computes a hash of "key". Any data passed to this function must be multiples of
// 4 bytes, since the PMurHash32 method can only operate increments of 4-byte words.
inline size_t ComputeGenericHash(const void *key, size_t keySize)
{ … }

template <typename T>
size_t ComputeGenericHash(const T &key)
{ … }

inline void HashCombine(size_t &seed) { … }

template <typename T, typename... Rest>
inline void HashCombine(std::size_t &seed, const T &hashableObject, Rest... rest)
{ … }

template <typename T, typename... Rest>
inline size_t HashMultiple(const T &hashableObject, Rest... rest)
{ … }

}  // namespace angle

#endif  // COMMON_HASHUTILS_H_