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#pragma once
#include <util/string/builder.h>
#include <util/system/mutex.h>
#include <util/generic/strbuf.h>
#include <util/generic/vector.h>
#include <util/generic/hash.h>
#include <util/generic/singleton.h>
#include <util/generic/serialized_enum.h>
class TLocalProcessKeyStateIndexLimiter {
public:
static constexpr ui32 GetMaxKeysCount() {
return 10000;
}
};
template <class T>
class TLocalProcessKeyStateIndexConstructor {
public:
};
template <typename T>
class TLocalProcessKeyState {
template <typename U, const char* Name>
friend class TLocalProcessKey;
template <typename U, class TClass, ui32 KeyLengthLimit>
friend class TLocalProcessExtKey;
template <typename U, typename EnumT>
friend class TEnumProcessKey;
public:
static TLocalProcessKeyState& GetInstance() {
return *Singleton<TLocalProcessKeyState<T>>();
}
ui32 GetCount() const {
return MaxKeysCount;
}
TStringBuf GetNameByIndex(size_t index) const {
Y_VERIFY(index < Names.size());
return Names[index];
}
size_t GetIndexByName(TStringBuf name) const {
TGuard<TMutex> g(Mutex);
auto it = Map.find(name);
Y_ENSURE(it != Map.end());
return it->second;
}
TLocalProcessKeyState() {
Names.resize(MaxKeysCount);
}
size_t Register(TStringBuf name) {
TGuard<TMutex> g(Mutex);
auto it = Map.find(name);
if (it != Map.end()) {
return it->second;
}
const ui32 index = TLocalProcessKeyStateIndexConstructor<T>::BuildCurrentIndex(name, Names.size());
auto x = Map.emplace(name, index);
if (x.second) {
Y_VERIFY(index < Names.size(), "a lot of actors or tags for memory monitoring");
Names[index] = name;
}
return x.first->second;
}
private:
static constexpr ui32 MaxKeysCount = TLocalProcessKeyStateIndexLimiter::GetMaxKeysCount();
private:
TVector<TString> Names;
THashMap<TString, size_t> Map;
TMutex Mutex;
};
template <typename T, const char* Name>
class TLocalProcessKey {
public:
static TStringBuf GetName() {
return Name;
}
static size_t GetIndex() {
return Index;
}
private:
inline static size_t Index = TLocalProcessKeyState<T>::GetInstance().Register(Name);
};
template <typename T, class TClass, ui32 KeyLengthLimit = 0>
class TLocalProcessExtKey {
public:
static TStringBuf GetName() {
return Name;
}
static size_t GetIndex() {
return Index;
}
private:
static TString TypeNameRobust() {
const TString className = TypeName<TClass>();
if (KeyLengthLimit && className.size() > KeyLengthLimit) {
return className.substr(0, KeyLengthLimit - 3) + "...";
} else {
return className;
}
}
static const inline TString Name = TypeName<TClass>();
inline static size_t Index = TLocalProcessKeyState<T>::GetInstance().Register(TypeNameRobust());
};
template <typename T, typename EnumT>
class TEnumProcessKey {
public:
static TStringBuf GetName(const EnumT key) {
return TLocalProcessKeyState<T>::GetInstance().GetNameByIndex(GetIndex(key));
}
static size_t GetIndex(const EnumT key) {
ui32 index = static_cast<ui32>(key);
Y_VERIFY(index < Enum2Index.size());
return Enum2Index[index];
}
private:
inline static TVector<size_t> RegisterAll() {
static_assert(std::is_enum<EnumT>::value, "Enum is required");
TVector<size_t> enum2Index;
auto names = GetEnumNames<EnumT>();
ui32 maxId = 0;
for (const auto& [k, v] : names) {
maxId = Max(maxId, static_cast<ui32>(k));
}
enum2Index.resize(maxId + 1);
for (const auto& [k, v] : names) {
ui32 enumId = static_cast<ui32>(k);
enum2Index[enumId] = TLocalProcessKeyState<T>::GetInstance().Register(v);
}
return enum2Index;
}
inline static TVector<size_t> Enum2Index = RegisterAll();
};
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