/*
- * Copyright 2015 Facebook, Inc.
+ * Copyright 2012-present Facebook, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
// AtomicHashMap constructor -- Atomic wrapper that allows growth
// This class has a lot of overhead (184 Bytes) so only use for big maps
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
-AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
- Allocator, ProbeFcn, KeyConvertFcn>::
-AtomicHashMap(size_t finalSizeEst, const Config& config)
- : kGrowthFrac_(config.growthFactor < 0 ?
- 1.0 - config.maxLoadFactor : config.growthFactor) {
- CHECK(config.maxLoadFactor > 0.0 && config.maxLoadFactor < 1.0);
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
+AtomicHashMap<
+ KeyT,
+ ValueT,
+ HashFcn,
+ EqualFcn,
+ Allocator,
+ ProbeFcn,
+ KeyConvertFcn>::AtomicHashMap(size_t finalSizeEst, const Config& config)
+ : kGrowthFrac_(
+ config.growthFactor < 0 ? 1.0f - config.maxLoadFactor
+ : config.growthFactor) {
+ CHECK(config.maxLoadFactor > 0.0f && config.maxLoadFactor < 1.0f);
subMaps_[0].store(SubMap::create(finalSizeEst, config).release(),
std::memory_order_relaxed);
auto subMapCount = kNumSubMaps_;
}
// emplace --
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
-template <typename LookupKeyT,
- typename LookupHashFcn,
- typename LookupEqualFcn,
- typename LookupKeyToKeyFcn,
- typename... ArgTs>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
+template <
+ typename LookupKeyT,
+ typename LookupHashFcn,
+ typename LookupEqualFcn,
+ typename LookupKeyToKeyFcn,
+ typename... ArgTs>
std::pair<typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn, Allocator,
ProbeFcn, KeyConvertFcn>::iterator, bool>
AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
}
// insertInternal -- Allocates new sub maps as existing ones fill up.
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
-template <typename LookupKeyT,
- typename LookupHashFcn,
- typename LookupEqualFcn,
- typename LookupKeyToKeyFcn,
- typename... ArgTs>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
+template <
+ typename LookupKeyT,
+ typename LookupHashFcn,
+ typename LookupEqualFcn,
+ typename LookupKeyToKeyFcn,
+ typename... ArgTs>
typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
SimpleRetT
size_t numCellsAllocated = (size_t)
(primarySubMap->capacity_ *
std::pow(1.0 + kGrowthFrac_, nextMapIdx - 1));
- size_t newSize = (int) (numCellsAllocated * kGrowthFrac_);
+ size_t newSize = size_t(numCellsAllocated * kGrowthFrac_);
DCHECK(subMaps_[nextMapIdx].load(std::memory_order_relaxed) ==
(SubMap*)kLockedPtr_);
// create a new map using the settings stored in the first map
}
// find --
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
template <class LookupKeyT, class LookupHashFcn, class LookupEqualFcn>
typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
return iterator(this, ret.i, subMap->makeIter(ret.j));
}
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
template <class LookupKeyT, class LookupHashFcn, class LookupEqualFcn>
typename AtomicHashMap<KeyT, ValueT,
HashFcn, EqualFcn, Allocator, ProbeFcn, KeyConvertFcn>::const_iterator
}
// findInternal --
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
template <class LookupKeyT, class LookupHashFcn, class LookupEqualFcn>
typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
if (LIKELY(ret.idx != primaryMap->capacity_)) {
return SimpleRetT(0, ret.idx, ret.success);
}
- int const numMaps = numMapsAllocated_.load(std::memory_order_acquire);
+ const unsigned int numMaps =
+ numMapsAllocated_.load(std::memory_order_acquire);
FOR_EACH_RANGE(i, 1, numMaps) {
// Check each map successively. If one succeeds, we're done!
SubMap* thisMap = subMaps_[i].load(std::memory_order_relaxed);
}
// findAtInternal -- see encodeIndex() for details.
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
SimpleRetT
}
// erase --
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
typename AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
size_type
}
// capacity -- summation of capacities of all submaps
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
size_t AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
capacity() const {
// spaceRemaining --
// number of new insertions until current submaps are all at max load
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
size_t AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
spaceRemaining() const {
// clear -- Wipes all keys and values from primary map and destroys
// all secondary maps. Not thread safe.
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
void AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
clear() {
}
// size --
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
size_t AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
size() const {
// 31 1
// 27-30 which subMap
// 0-26 subMap offset (index_ret input)
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
inline uint32_t
AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
encodeIndex(uint32_t subMap, uint32_t offset) {
DCHECK_EQ(offset & kSecondaryMapBit_, 0); // offset can't be too big
- if (subMap == 0) return offset;
+ if (subMap == 0) {
+ return offset;
+ }
// Make sure subMap isn't too big
DCHECK_EQ(subMap >> kNumSubMapBits_, 0);
// Make sure subMap bits of offset are clear
// Iterator implementation
-template <typename KeyT,
- typename ValueT,
- typename HashFcn,
- typename EqualFcn,
- typename Allocator,
- typename ProbeFcn,
- typename KeyConvertFcn>
+template <
+ typename KeyT,
+ typename ValueT,
+ typename HashFcn,
+ typename EqualFcn,
+ typename Allocator,
+ typename ProbeFcn,
+ typename KeyConvertFcn>
template <class ContT, class IterVal, class SubIt>
struct AtomicHashMap<KeyT, ValueT, HashFcn, EqualFcn,
Allocator, ProbeFcn, KeyConvertFcn>::
ahm_iterator : boost::iterator_facade<ahm_iterator<ContT, IterVal, SubIt>,
IterVal,
boost::forward_traversal_tag> {
- explicit ahm_iterator() : ahm_(0) {}
+ explicit ahm_iterator() : ahm_(nullptr) {}
// Conversion ctor for interoperability between const_iterator and
// iterator. The enable_if<> magic keeps us well-behaved for
// is_convertible<> (v. the iterator_facade documentation).
- template<class OtherContT, class OtherVal, class OtherSubIt>
- ahm_iterator(const ahm_iterator<OtherContT,OtherVal,OtherSubIt>& o,
- typename std::enable_if<
- std::is_convertible<OtherSubIt,SubIt>::value >::type* = 0)
- : ahm_(o.ahm_)
- , subMap_(o.subMap_)
- , subIt_(o.subIt_)
- {}
+ template <class OtherContT, class OtherVal, class OtherSubIt>
+ ahm_iterator(
+ const ahm_iterator<OtherContT, OtherVal, OtherSubIt>& o,
+ typename std::enable_if<
+ std::is_convertible<OtherSubIt, SubIt>::value>::type* = nullptr)
+ : ahm_(o.ahm_), subMap_(o.subMap_), subIt_(o.subIt_) {}
/*
* Returns the unique index that can be used for access directly