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Add MemoryCompare, MemoryClear and MemoryCopy for direct memory access in C#

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This commit is contained in:
Wojtek Figat
2021-05-30 14:11:25 +02:00
parent 1bd109395a
commit 9c66ac4656
6 changed files with 56 additions and 26 deletions
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39
Source/Engine/Utilities/Utils.cs
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@@ -17,14 +17,45 @@ namespace FlaxEngine
/// <summary>
/// Copies data from one memory location to another using an unmanaged memory pointers.
/// </summary>
/// <remarks>
/// Uses low-level memcpy call.
/// </remarks>
/// <remarks>Uses low-level platform impl.</remarks>
/// <param name="source">The source location.</param>
/// <param name="destination">The destination location.</param>
/// <param name="length">The length (amount of bytes to copy).</param>
[Obsolete("Use MemoryCopy with long length and source/destination swapped to match C++ API.")]
public static void MemoryCopy(IntPtr source, IntPtr destination, int length)
{
// [Deprecated on 30.05.2021, expires on 30.05.2022]
MemoryCopy(destination, source, (ulong)length);
}
/// <summary>
/// Copies data from one memory location to another using an unmanaged memory pointers.
/// </summary>
/// <remarks>Uses low-level platform impl.</remarks>
/// <param name="source">The source location.</param>
/// <param name="destination">The destination location.</param>
/// <param name="length">The length (amount of bytes to copy).</param>
[MethodImpl(MethodImplOptions.InternalCall)]
public static extern void MemoryCopy(IntPtr source, IntPtr destination, int length);
public static extern void MemoryCopy(IntPtr destination, IntPtr source, ulong length);
/// <summary>
/// Clears the memory region with zeros.
/// </summary>
/// <remarks>Uses low-level platform impl.</remarks>
/// <param name="dst">Destination memory address</param>
/// <param name="size">Size of the memory to clear in bytes</param>
[MethodImpl(MethodImplOptions.InternalCall)]
public static extern void MemoryClear(IntPtr dst, ulong size);
/// <summary>
/// Compares two blocks of the memory.
/// </summary>
/// <remarks>Uses low-level platform impl.</remarks>
/// <param name="buf1">The first buffer address.</param>
/// <param name="buf2">The second buffer address.</param>
/// <param name="size">Size of the memory to compare in bytes.</param>
[MethodImpl(MethodImplOptions.InternalCall)]
public static extern int MemoryCompare(IntPtr buf1, IntPtr buf2, ulong size);
/// <summary>
/// Rounds the floating point value up to 1 decimal place.