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#if !defined(phmap_dump_h_guard_)
#define phmap_dump_h_guard_
// ---------------------------------------------------------------------------
// Copyright (c) 2019, Gregory Popovitch - [email protected]
//
// 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 {
// ------------------------------------------------------------------------
// 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>::dump(OutputArchive& ar) const {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
if (!ar.dump(size_)) {
std::cerr << "Failed to dump size_" << std::endl;
return false;
}
if (size_ == 0) {
return true;
}
if (!ar.dump(capacity_)) {
std::cerr << "Failed to dump capacity_" << std::endl;
return false;
}
if (!ar.dump(reinterpret_cast<char*>(ctrl_),
sizeof(ctrl_t) * (capacity_ + Group::kWidth + 1))) {
std::cerr << "Failed to dump ctrl_" << std::endl;
return false;
}
if (!ar.dump(reinterpret_cast<char*>(slots_),
sizeof(slot_type) * capacity_)) {
std::cerr << "Failed to dump slot_" << std::endl;
return false;
}
return true;
}
template <class Policy, class Hash, class Eq, class Alloc>
template<typename InputArchive>
bool raw_hash_set<Policy, Hash, Eq, Alloc>::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
if (!ar.load(&size_)) {
std::cerr << "Failed to load size_" << std::endl;
return false;
}
if (size_ == 0) {
return true;
}
if (!ar.load(&capacity_)) {
std::cerr << "Failed to load capacity_" << std::endl;
return false;
}
// allocate memory for ctrl_ and slots_
initialize_slots();
if (!ar.load(reinterpret_cast<char*>(ctrl_),
sizeof(ctrl_t) * (capacity_ + Group::kWidth + 1))) {
std::cerr << "Failed to load ctrl" << std::endl;
return false;
}
if (!ar.load(reinterpret_cast<char*>(slots_),
sizeof(slot_type) * capacity_)) {
std::cerr << "Failed to load slot" << std::endl;
return false;
}
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>::dump(OutputArchive& ar) const {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
if (! ar.dump(subcnt())) {
std::cerr << "Failed to dump meta!" << std::endl;
return false;
}
for (size_t i = 0; i < sets_.size(); ++i) {
auto& inner = sets_[i];
typename Lockable::UniqueLock m(const_cast<Inner&>(inner));
if (!inner.set_.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>::load(InputArchive& ar) {
static_assert(type_traits_internal::IsTriviallyCopyable<value_type>::value,
"value_type should be trivially copyable");
size_t submap_count = 0;
if (!ar.load(&submap_count)) {
std::cerr << "Failed to load submap count!" << std::endl;
return false;
}
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_.load(ar)) {
std::cerr << "Failed to load submap " << i << std::endl;
return false;
}
}
return true;
}
} // namespace priv
// ------------------------------------------------------------------------
// BinaryArchive
// File is closed when archive object is destroyed
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
// ------------------------------------------------------------------------
class BinaryOutputArchive {
public:
BinaryOutputArchive(const char *file_path) {
ofs_.open(file_path, std::ios_base::binary);
}
bool dump(const char *p, size_t sz) {
ofs_.write(p, sz);
return true;
}
template<typename V>
typename std::enable_if<type_traits_internal::IsTriviallyCopyable<V>::value, bool>::type
dump(const V& v) {
ofs_.write(reinterpret_cast<const char *>(&v), sizeof(V));
return true;
}
private:
std::ofstream ofs_;
};
class BinaryInputArchive {
public:
BinaryInputArchive(const char * file_path) {
ifs_.open(file_path, std::ios_base::binary);
}
bool load(char* p, size_t sz) {
ifs_.read(p, sz);
return true;
}
template<typename V>
typename std::enable_if<type_traits_internal::IsTriviallyCopyable<V>::value, bool>::type
load(V* v) {
ifs_.read(reinterpret_cast<char *>(v), sizeof(V));
return true;
}
private:
std::ifstream ifs_;
};
} // namespace phmap
#endif // phmap_dump_h_guard_
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