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Improved DynamicEnum caching

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Ell 2021-09-05 16:18:26 +02:00
parent 6537ff00c1
commit 54e3c98029
2 changed files with 76 additions and 41 deletions
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CHANGELOG.md
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@ -48,6 +48,7 @@ Additions
Improvements
- Improved RawContentManager's reader loading and added better exception handling
- Improved CopyExtensions construction speed
- Improved DynamicEnum caching
## 5.0.0
### MLEM

116
MLEM.Data/DynamicEnum.cs
View file

@ -12,6 +12,9 @@ namespace MLEM.Data {
/// A dynamic enum uses <see cref="BigInteger"/> as its underlying type, allowing for an arbitrary number of enum values to be created, even when a <see cref="FlagsAttribute"/>-like structure is used that would only allow for up to 64 values in a regular enum.
/// All enum operations including <see cref="And{T}"/>, <see cref="Or{T}"/>, <see cref="Xor{T}"/> and <see cref="Neg{T}"/> are supported and can be implemented in derived classes using operator overloads.
/// To create a custom dynamic enum, simply create a class that extends <see cref="DynamicEnum"/>. New values can then be added using <see cref="Add{T}"/>, <see cref="AddValue{T}"/> or <see cref="AddFlag{T}"/>.
///
/// This class, and its entire concept, are extremely terrible. If you intend on using this, there's probably at least one better solution available.
/// Though if, for some weird reason, you need a way to have more than 64 distinct flags, this is a pretty good solution.
/// </summary>
/// <remarks>
/// To include enum-like operator overloads in a dynamic enum named MyEnum, the following code can be used:
@ -27,10 +30,7 @@ namespace MLEM.Data {
[JsonConverter(typeof(DynamicEnumConverter))]
public abstract class DynamicEnum {
private static readonly Dictionary<Type, Dictionary<BigInteger, DynamicEnum>> Values = new Dictionary<Type, Dictionary<BigInteger, DynamicEnum>>();
private static readonly Dictionary<Type, Dictionary<BigInteger, DynamicEnum>> FlagCache = new Dictionary<Type, Dictionary<BigInteger, DynamicEnum>>();
private static readonly Dictionary<Type, Dictionary<string, DynamicEnum>> ParseCache = new Dictionary<Type, Dictionary<string, DynamicEnum>>();
private static readonly Dictionary<Type, Storage> Storages = new Dictionary<Type, Storage>();
private readonly BigInteger value;
private Dictionary<DynamicEnum, bool> allFlagsCache;
@ -59,8 +59,7 @@ namespace MLEM.Data {
if (this.allFlagsCache == null)
this.allFlagsCache = new Dictionary<DynamicEnum, bool>();
if (!this.allFlagsCache.TryGetValue(flags, out var ret)) {
// & is very memory-intensive, so we cache the return value
ret = (GetValue(this) & GetValue(flags)) == GetValue(flags);
ret = And(this, flags) == flags;
this.allFlagsCache.Add(flags, ret);
}
return ret;
@ -76,8 +75,7 @@ namespace MLEM.Data {
if (this.anyFlagsCache == null)
this.anyFlagsCache = new Dictionary<DynamicEnum, bool>();
if (!this.anyFlagsCache.TryGetValue(flags, out var ret)) {
// & is very memory-intensive, so we cache the return value
ret = (GetValue(this) & GetValue(flags)) != 0;
ret = GetValue(And(this, flags)) != 0;
this.anyFlagsCache.Add(flags, ret);
}
return ret;
@ -107,24 +105,20 @@ namespace MLEM.Data {
/// <returns>The newly created enum value</returns>
/// <exception cref="ArgumentException">Thrown if the name or value passed are already present</exception>
public static T Add<T>(string name, BigInteger value) where T : DynamicEnum {
if (!Values.TryGetValue(typeof(T), out var dict)) {
dict = new Dictionary<BigInteger, DynamicEnum>();
Values.Add(typeof(T), dict);
}
var storage = GetStorage(typeof(T));
// cached parsed values and names might be incomplete with new values
FlagCache.Remove(typeof(T));
ParseCache.Remove(typeof(T));
storage.ClearCaches();
if (dict.ContainsKey(value))
if (storage.Values.ContainsKey(value))
throw new ArgumentException($"Duplicate value {value}", nameof(value));
foreach (var v in dict.Values) {
foreach (var v in storage.Values.Values) {
if (v.name == name)
throw new ArgumentException($"Duplicate name {name}", nameof(name));
}
var ret = Construct(typeof(T), name, value);
dict.Add(value, ret);
storage.Values.Add(value, ret);
return (T) ret;
}
@ -138,10 +132,8 @@ namespace MLEM.Data {
/// <returns>The newly created enum value</returns>
public static T AddValue<T>(string name) where T : DynamicEnum {
BigInteger value = 0;
if (Values.TryGetValue(typeof(T), out var defined)) {
while (defined.ContainsKey(value))
value++;
}
while (GetStorage(typeof(T)).Values.ContainsKey(value))
value++;
return Add<T>(name, value);
}
@ -155,10 +147,8 @@ namespace MLEM.Data {
/// <returns>The newly created enum value</returns>
public static T AddFlag<T>(string name) where T : DynamicEnum {
BigInteger value = 0;
if (Values.TryGetValue(typeof(T), out var defined)) {
while (defined.ContainsKey(value))
value <<= 1;
}
while (GetStorage(typeof(T)).Values.ContainsKey(value))
value <<= 1;
return Add<T>(name, value);
}
@ -179,7 +169,7 @@ namespace MLEM.Data {
/// <param name="type">The type whose values to get</param>
/// <returns>The defined values for the given type</returns>
public static IEnumerable<DynamicEnum> GetValues(Type type) {
return Values.TryGetValue(type, out var ret) ? ret.Values : Enumerable.Empty<DynamicEnum>();
return GetStorage(type).Values.Values;
}
/// <summary>
@ -190,7 +180,12 @@ namespace MLEM.Data {
/// <typeparam name="T">The type of the values</typeparam>
/// <returns>The bitwise OR (|) combination</returns>
public static T Or<T>(T left, T right) where T : DynamicEnum {
return GetEnumValue<T>(GetValue(left) | GetValue(right));
var cache = GetStorage(typeof(T)).OrCache;
if (!cache.TryGetValue((left, right), out var ret)) {
ret = GetEnumValue<T>(GetValue(left) | GetValue(right));
cache.Add((left, right), ret);
}
return (T) ret;
}
/// <summary>
@ -201,7 +196,12 @@ namespace MLEM.Data {
/// <typeparam name="T">The type of the values</typeparam>
/// <returns>The bitwise AND (&amp;) combination</returns>
public static T And<T>(T left, T right) where T : DynamicEnum {
return GetEnumValue<T>(GetValue(left) & GetValue(right));
var cache = GetStorage(typeof(T)).AndCache;
if (!cache.TryGetValue((left, right), out var ret)) {
ret = GetEnumValue<T>(GetValue(left) & GetValue(right));
cache.Add((left, right), ret);
}
return (T) ret;
}
/// <summary>
@ -212,7 +212,12 @@ namespace MLEM.Data {
/// <typeparam name="T">The type of the values</typeparam>
/// <returns>The bitwise XOR (^) combination</returns>
public static T Xor<T>(T left, T right) where T : DynamicEnum {
return GetEnumValue<T>(GetValue(left) ^ GetValue(right));
var cache = GetStorage(typeof(T)).XorCache;
if (!cache.TryGetValue((left, right), out var ret)) {
ret = GetEnumValue<T>(GetValue(left) ^ GetValue(right));
cache.Add((left, right), ret);
}
return (T) ret;
}
/// <summary>
@ -222,7 +227,12 @@ namespace MLEM.Data {
/// <typeparam name="T">The type of the values</typeparam>
/// <returns>The bitwise NEG (~) value</returns>
public static T Neg<T>(T value) where T : DynamicEnum {
return GetEnumValue<T>(~GetValue(value));
var cache = GetStorage(typeof(T)).NegCache;
if (!cache.TryGetValue(value, out var ret)) {
ret = GetEnumValue<T>(~GetValue(value));
cache.Add(value, ret);
}
return (T) ret;
}
/// <summary>
@ -251,18 +261,16 @@ namespace MLEM.Data {
/// <param name="value">The value whose dynamic enum value to get</param>
/// <returns>The defined or combined dynamic enum value</returns>
public static DynamicEnum GetEnumValue(Type type, BigInteger value) {
var storage = GetStorage(type);
// get the defined value if it exists
if (Values.TryGetValue(type, out var values) && values.TryGetValue(value, out var defined))
if (storage.Values.TryGetValue(value, out var defined))
return defined;
// otherwise, cache the combined value
if (!FlagCache.TryGetValue(type, out var cache)) {
cache = new Dictionary<BigInteger, DynamicEnum>();
FlagCache.Add(type, cache);
}
if (!cache.TryGetValue(value, out var combined)) {
if (!storage.FlagCache.TryGetValue(value, out var combined)) {
combined = Construct(type, null, value);
cache.Add(value, combined);
storage.FlagCache.Add(value, combined);
}
return combined;
}
@ -287,10 +295,7 @@ namespace MLEM.Data {
/// <param name="strg">The string to parse into a dynamic enum value</param>
/// <returns>The parsed enum value, or null if parsing fails</returns>
public static DynamicEnum Parse(Type type, string strg) {
if (!ParseCache.TryGetValue(type, out var cache)) {
cache = new Dictionary<string, DynamicEnum>();
ParseCache.Add(type, cache);
}
var cache = GetStorage(type).ParseCache;
if (!cache.TryGetValue(strg, out var cached)) {
BigInteger? accum = null;
foreach (var val in strg.Split('|')) {
@ -308,10 +313,39 @@ namespace MLEM.Data {
return cached;
}
private static Storage GetStorage(Type type) {
if (!Storages.TryGetValue(type, out var storage)) {
storage = new Storage();
Storages.Add(type, storage);
}
return storage;
}
private static DynamicEnum Construct(Type type, string name, BigInteger value) {
var constructor = type.GetConstructor(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic, null, new[] {typeof(string), typeof(BigInteger)}, null);
return (DynamicEnum) constructor.Invoke(new object[] {name, value});
}
private class Storage {
public readonly Dictionary<BigInteger, DynamicEnum> Values = new Dictionary<BigInteger, DynamicEnum>();
public readonly Dictionary<BigInteger, DynamicEnum> FlagCache = new Dictionary<BigInteger, DynamicEnum>();
public readonly Dictionary<string, DynamicEnum> ParseCache = new Dictionary<string, DynamicEnum>();
public readonly Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum> OrCache = new Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum>();
public readonly Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum> AndCache = new Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum>();
public readonly Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum> XorCache = new Dictionary<(DynamicEnum, DynamicEnum), DynamicEnum>();
public readonly Dictionary<DynamicEnum, DynamicEnum> NegCache = new Dictionary<DynamicEnum, DynamicEnum>();
public void ClearCaches() {
this.FlagCache.Clear();
this.ParseCache.Clear();
this.OrCache.Clear();
this.AndCache.Clear();
this.XorCache.Clear();
this.NegCache.Clear();
}
}
}
}