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Update SafeMemory.cs

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make this a bit faster
This commit is contained in:
pohky 2021-01-20 00:57:34 +01:00
parent 3fe6e45b68
commit 393fe25e79
1 changed files with 31 additions and 25 deletions
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56
Dalamud/SafeMemory.cs
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@ -55,7 +55,7 @@ namespace Dalamud
/// <param name="result">The resulting object.</param>
/// <returns>Whether or not the read succeeded.</returns>
public static bool Read<T>(IntPtr address, out T result) where T : struct {
if (!ReadBytes(address, SizeOf<T>(), out var buffer)) {
if (!ReadBytes(address, SizeCache<T>.Size, out var buffer)) {
result = default;
return false;
}
@ -78,19 +78,14 @@ namespace Dalamud
public static T[] Read<T>(IntPtr address, int count) where T : struct
{
var size = SizeOf<T>();
if (!ReadBytes(address, count * size, out var buffer))
return null;
var result = new T[count];
var readSucceeded = true;
for (var i = 0; i < count; i++) {
var success = Read<T>(address + i * size, out var res);
if (!success)
readSucceeded = false;
result[i] = res;
}
return !readSucceeded ? null : result;
using var mem = new LocalMemory(buffer.Length);
mem.Write(buffer);
for (var i = 0; i < result.Length; i++)
result[i] = mem.Read<T>(i * size);
return result;
}
/// <summary>
@ -102,7 +97,7 @@ namespace Dalamud
/// <returns>Whether or not the write succeeded.</returns>
public static bool Write<T>(IntPtr address, T obj) where T : struct
{
using var mem = new LocalMemory(SizeOf<T>());
using var mem = new LocalMemory(SizeCache<T>.Size);
mem.Write(obj);
return WriteBytes(address, mem.Read());
}
@ -118,11 +113,11 @@ namespace Dalamud
{
if (objArray == null || objArray.Length == 0)
return true;
var size = SizeOf<T>();
var size = SizeCache<T>.Size;
using var mem = new LocalMemory(objArray.Length * size);
for (var i = 0; i < objArray.Length; i++)
if (!Write(address + i * size, objArray[i]))
return false;
return true;
mem.Write(objArray[i], i * size);
return WriteBytes(address, mem.Read());
}
/// <summary>
@ -204,12 +199,23 @@ namespace Dalamud
/// </summary>
/// <typeparam name="T">The type to inspect.</typeparam>
/// <returns>The size of the passed type.</returns>
public static int SizeOf<T>()
public static int SizeOf<T>() where T: struct
{
var type = typeof(T);
if (type.IsEnum)
type = type.GetEnumUnderlyingType();
return Type.GetTypeCode(type) == TypeCode.Boolean ? 1 : Marshal.SizeOf(type);
return SizeCache<T>.Size;
}
private static class SizeCache<T>
{
// ReSharper disable once StaticMemberInGenericType
public static readonly int Size;
static SizeCache()
{
var type = typeof(T);
if (type.IsEnum)
type = type.GetEnumUnderlyingType();
Size = Type.GetTypeCode(type) == TypeCode.Boolean ? 1 : Marshal.SizeOf(type);
}
}
private static class Imports
@ -242,9 +248,9 @@ namespace Dalamud
return bytes;
}
public T Read<T>() => (T)Marshal.PtrToStructure(this.hGlobal, typeof(T));
public T Read<T>(int offset = 0) => (T)Marshal.PtrToStructure(this.hGlobal + offset, typeof(T));
public void Write(byte[] data, int index = 0) => Marshal.Copy(data, index, this.hGlobal, this.size);
public void Write<T>(T data) => Marshal.StructureToPtr(data, this.hGlobal, false);
public void Write<T>(T data, int offset = 0) => Marshal.StructureToPtr(data, this.hGlobal + offset, false);
~LocalMemory() => Dispose();
public void Dispose()