Endgame-Analyzer/include/parallel_hashmap/phmap_dump.h
Maximilian Keßler f0a496a8f0
Use parallel_hashmap library for better performance
This drastically reduces memory usage and also gains some performance.
Since this is a drop-in replacement, there is essentially no downside in
using this.
2024-02-07 19:52:02 +01:00

312 lines
11 KiB
C++

#if !defined(phmap_dump_h_guard_)
#define phmap_dump_h_guard_
// ---------------------------------------------------------------------------
// Copyright (c) 2019, Gregory Popovitch - greg7mdp@gmail.com
//
// providing dump/load/mmap_load
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ---------------------------------------------------------------------------
#include <iostream>
#include <fstream>
#include <sstream>
#include "phmap.h"
namespace phmap
{
namespace type_traits_internal {
#if defined(__GLIBCXX__) && __GLIBCXX__ < 20150801
template<typename T> struct IsTriviallyCopyable : public std::integral_constant<bool, __has_trivial_copy(T)> {};
#else
template<typename T> struct IsTriviallyCopyable : public std::is_trivially_copyable<T> {};
#endif
template <class T1, class T2>
struct IsTriviallyCopyable<std::pair<T1, T2>> {
static constexpr bool value = IsTriviallyCopyable<T1>::value && IsTriviallyCopyable<T2>::value;
};
}
namespace priv {
#if !defined(PHMAP_NON_DETERMINISTIC) && !defined(PHMAP_DISABLE_DUMP)
static constexpr size_t s_version_base = std::numeric_limits<size_t>::max() - 10;
static constexpr size_t s_version = s_version_base;
// ------------------------------------------------------------------------
// dump/load for raw_hash_set
// ------------------------------------------------------------------------
template <class Policy, class Hash, class Eq, class Alloc>
template<typename OutputArchive>
bool raw_hash_set<Policy, Hash, Eq, Alloc>::phmap_dump(OutputArchive& ar) const {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
ar.saveBinary(&s_version, sizeof(size_t));
ar.saveBinary(&size_, sizeof(size_t));
ar.saveBinary(&capacity_, sizeof(size_t));
if (size_ == 0)
return true;
ar.saveBinary(ctrl_, sizeof(ctrl_t) * (capacity_ + Group::kWidth + 1));
ar.saveBinary(slots_, sizeof(slot_type) * capacity_);
ar.saveBinary(&growth_left(), sizeof(size_t));
return true;
}
template <class Policy, class Hash, class Eq, class Alloc>
template<typename InputArchive>
bool raw_hash_set<Policy, Hash, Eq, Alloc>::phmap_load(InputArchive& ar) {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
raw_hash_set<Policy, Hash, Eq, Alloc>().swap(*this); // clear any existing content
size_t version = 0;
ar.loadBinary(&version, sizeof(size_t));
if (version < s_version_base) {
// we didn't store the version, version actually contains the size
size_ = version;
} else {
ar.loadBinary(&size_, sizeof(size_t));
}
ar.loadBinary(&capacity_, sizeof(size_t));
if (capacity_) {
// allocate memory for ctrl_ and slots_
initialize_slots(capacity_);
}
if (size_ == 0)
return true;
ar.loadBinary(ctrl_, sizeof(ctrl_t) * (capacity_ + Group::kWidth + 1));
ar.loadBinary(slots_, sizeof(slot_type) * capacity_);
if (version >= s_version_base) {
// growth_left should be restored after calling initialize_slots() which resets it.
ar.loadBinary(&growth_left(), sizeof(size_t));
}
return true;
}
// ------------------------------------------------------------------------
// dump/load for parallel_hash_set
// ------------------------------------------------------------------------
template <size_t N,
template <class, class, class, class> class RefSet,
class Mtx_,
class Policy, class Hash, class Eq, class Alloc>
template<typename OutputArchive>
bool parallel_hash_set<N, RefSet, Mtx_, Policy, Hash, Eq, Alloc>::phmap_dump(OutputArchive& ar) const {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
size_t submap_count = subcnt();
ar.saveBinary(&submap_count, sizeof(size_t));
for (size_t i = 0; i < sets_.size(); ++i) {
auto& inner = sets_[i];
typename Lockable::UniqueLock m(const_cast<Inner&>(inner));
if (!inner.set_.phmap_dump(ar)) {
std::cerr << "Failed to dump submap " << i << std::endl;
return false;
}
}
return true;
}
template <size_t N,
template <class, class, class, class> class RefSet,
class Mtx_,
class Policy, class Hash, class Eq, class Alloc>
template<typename InputArchive>
bool parallel_hash_set<N, RefSet, Mtx_, Policy, Hash, Eq, Alloc>::phmap_load(InputArchive& ar) {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
size_t submap_count = 0;
ar.loadBinary(&submap_count, sizeof(size_t));
if (submap_count != subcnt()) {
std::cerr << "submap count(" << submap_count << ") != N(" << N << ")" << std::endl;
return false;
}
for (size_t i = 0; i < submap_count; ++i) {
auto& inner = sets_[i];
typename Lockable::UniqueLock m(const_cast<Inner&>(inner));
if (!inner.set_.phmap_load(ar)) {
std::cerr << "Failed to load submap " << i << std::endl;
return false;
}
}
return true;
}
#endif // !defined(PHMAP_NON_DETERMINISTIC) && !defined(PHMAP_DISABLE_DUMP)
} // namespace priv
// ------------------------------------------------------------------------
// BinaryArchive
// File is closed when archive object is destroyed
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
class BinaryOutputArchive {
public:
BinaryOutputArchive(const char *file_path) {
ofs_.open(file_path, std::ofstream::out | std::ofstream::trunc | std::ofstream::binary);
}
~BinaryOutputArchive() = default;
BinaryOutputArchive(const BinaryOutputArchive&) = delete;
BinaryOutputArchive& operator=(const BinaryOutputArchive&) = delete;
bool saveBinary(const void *p, size_t sz) {
ofs_.write(reinterpret_cast<const char*>(p), (std::streamsize)sz);
return true;
}
template<typename V>
typename std::enable_if<type_traits_internal::IsTriviallyCopyable<V>::value, bool>::type
saveBinary(const V& v) {
ofs_.write(reinterpret_cast<const char *>(&v), sizeof(V));
return true;
}
template<typename Map>
auto saveBinary(const Map& v) -> decltype(v.phmap_dump(*this), bool())
{
return v.phmap_dump(*this);
}
private:
std::ofstream ofs_;
};
class BinaryInputArchive {
public:
BinaryInputArchive(const char * file_path) {
ifs_.open(file_path, std::ofstream::in | std::ofstream::binary);
}
~BinaryInputArchive() = default;
BinaryInputArchive(const BinaryInputArchive&) = delete;
BinaryInputArchive& operator=(const BinaryInputArchive&) = delete;
bool loadBinary(void* p, size_t sz) {
ifs_.read(reinterpret_cast<char*>(p), (std::streamsize)sz);
return true;
}
template<typename V>
typename std::enable_if<type_traits_internal::IsTriviallyCopyable<V>::value, bool>::type
loadBinary(V* v) {
ifs_.read(reinterpret_cast<char *>(v), sizeof(V));
return true;
}
template<typename Map>
auto loadBinary(Map* v) -> decltype(v->phmap_load(*this), bool())
{
return v->phmap_load(*this);
}
private:
std::ifstream ifs_;
};
} // namespace phmap
#ifdef CEREAL_SIZE_TYPE
template <class T>
using PhmapTrivCopyable = typename phmap::type_traits_internal::IsTriviallyCopyable<T>;
namespace cereal
{
// Overload Cereal serialization code for phmap::flat_hash_map
// -----------------------------------------------------------
template <class K, class V, class Hash, class Eq, class A>
void save(typename std::enable_if<PhmapTrivCopyable<K>::value && PhmapTrivCopyable<V>::value, typename cereal::BinaryOutputArchive>::type &ar,
phmap::flat_hash_map<K, V, Hash, Eq, A> const &hmap)
{
hmap.phmap_dump(ar);
}
template <class K, class V, class Hash, class Eq, class A>
void load(typename std::enable_if<PhmapTrivCopyable<K>::value && PhmapTrivCopyable<V>::value, typename cereal::BinaryInputArchive>::type &ar,
phmap::flat_hash_map<K, V, Hash, Eq, A> &hmap)
{
hmap.phmap_load(ar);
}
// Overload Cereal serialization code for phmap::parallel_flat_hash_map
// --------------------------------------------------------------------
template <class K, class V, class Hash, class Eq, class A, size_t N, class Mtx_>
void save(typename std::enable_if<PhmapTrivCopyable<K>::value && PhmapTrivCopyable<V>::value, typename cereal::BinaryOutputArchive>::type &ar,
phmap::parallel_flat_hash_map<K, V, Hash, Eq, A, N, Mtx_> const &hmap)
{
hmap.phmap_dump(ar);
}
template <class K, class V, class Hash, class Eq, class A, size_t N, class Mtx_>
void load(typename std::enable_if<PhmapTrivCopyable<K>::value && PhmapTrivCopyable<V>::value, typename cereal::BinaryInputArchive>::type &ar,
phmap::parallel_flat_hash_map<K, V, Hash, Eq, A, N, Mtx_> &hmap)
{
hmap.phmap_load(ar);
}
// Overload Cereal serialization code for phmap::flat_hash_set
// -----------------------------------------------------------
template <class K, class Hash, class Eq, class A>
void save(typename std::enable_if<PhmapTrivCopyable<K>::value, typename cereal::BinaryOutputArchive>::type &ar,
phmap::flat_hash_set<K, Hash, Eq, A> const &hset)
{
hset.phmap_dump(ar);
}
template <class K, class Hash, class Eq, class A>
void load(typename std::enable_if<PhmapTrivCopyable<K>::value, typename cereal::BinaryInputArchive>::type &ar,
phmap::flat_hash_set<K, Hash, Eq, A> &hset)
{
hset.phmap_load(ar);
}
// Overload Cereal serialization code for phmap::parallel_flat_hash_set
// --------------------------------------------------------------------
template <class K, class Hash, class Eq, class A, size_t N, class Mtx_>
void save(typename std::enable_if<PhmapTrivCopyable<K>::value, typename cereal::BinaryOutputArchive>::type &ar,
phmap::parallel_flat_hash_set<K, Hash, Eq, A, N, Mtx_> const &hset)
{
hset.phmap_dump(ar);
}
template <class K, class Hash, class Eq, class A, size_t N, class Mtx_>
void load(typename std::enable_if<PhmapTrivCopyable<K>::value, typename cereal::BinaryInputArchive>::type &ar,
phmap::parallel_flat_hash_set<K, Hash, Eq, A, N, Mtx_> &hset)
{
hset.phmap_load(ar);
}
}
#endif
#endif // phmap_dump_h_guard_