767e374dce
Since Embree v3.13.0 supports AARCH64, switch back to the official repo instead of using Embree-aarch64. `thirdparty/embree/patches/godot-changes.patch` should now contain an accurate diff of the changes done to the library.
86 lines
2.5 KiB
C++
86 lines
2.5 KiB
C++
// Copyright 2009-2021 Intel Corporation
|
|
// SPDX-License-Identifier: Apache-2.0
|
|
|
|
#pragma once
|
|
|
|
#include "parallel_sort.h"
|
|
|
|
namespace embree
|
|
{
|
|
/*! implementation of a key/value map with parallel construction */
|
|
template<typename Key, typename Val>
|
|
class parallel_map
|
|
{
|
|
/* key/value pair to build the map */
|
|
struct KeyValue
|
|
{
|
|
__forceinline KeyValue () {}
|
|
|
|
__forceinline KeyValue (const Key key, const Val val)
|
|
: key(key), val(val) {}
|
|
|
|
__forceinline operator Key() const {
|
|
return key;
|
|
}
|
|
|
|
public:
|
|
Key key;
|
|
Val val;
|
|
};
|
|
|
|
public:
|
|
|
|
/*! parallel map constructors */
|
|
parallel_map () {}
|
|
|
|
/*! construction from pair of vectors */
|
|
template<typename KeyVector, typename ValVector>
|
|
parallel_map (const KeyVector& keys, const ValVector& values) { init(keys,values); }
|
|
|
|
/*! initialized the parallel map from a vector with keys and values */
|
|
template<typename KeyVector, typename ValVector>
|
|
void init(const KeyVector& keys, const ValVector& values)
|
|
{
|
|
/* reserve sufficient space for all data */
|
|
assert(keys.size() == values.size());
|
|
vec.resize(keys.size());
|
|
|
|
/* generate key/value pairs */
|
|
parallel_for( size_t(0), keys.size(), size_t(4*4096), [&](const range<size_t>& r) {
|
|
for (size_t i=r.begin(); i<r.end(); i++)
|
|
vec[i] = KeyValue((Key)keys[i],values[i]);
|
|
});
|
|
|
|
/* perform parallel radix sort of the key/value pairs */
|
|
std::vector<KeyValue> temp(keys.size());
|
|
radix_sort<KeyValue,Key>(vec.data(),temp.data(),keys.size());
|
|
}
|
|
|
|
/*! Returns a pointer to the value associated with the specified key. The pointer will be nullptr of the key is not contained in the map. */
|
|
__forceinline const Val* lookup(const Key& key) const
|
|
{
|
|
typename std::vector<KeyValue>::const_iterator i = std::lower_bound(vec.begin(), vec.end(), key);
|
|
if (i == vec.end()) return nullptr;
|
|
if (i->key != key) return nullptr;
|
|
return &i->val;
|
|
}
|
|
|
|
/*! If the key is in the map, the function returns the value associated with the key, otherwise it returns the default value. */
|
|
__forceinline Val lookup(const Key& key, const Val& def) const
|
|
{
|
|
typename std::vector<KeyValue>::const_iterator i = std::lower_bound(vec.begin(), vec.end(), key);
|
|
if (i == vec.end()) return def;
|
|
if (i->key != key) return def;
|
|
return i->val;
|
|
}
|
|
|
|
/*! clears all state */
|
|
void clear() {
|
|
vec.clear();
|
|
}
|
|
|
|
private:
|
|
std::vector<KeyValue> vec; //!< vector containing sorted elements
|
|
};
|
|
}
|