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using System;
using System.Runtime;
using System.Runtime.InteropServices;
namespace System.Windows.Media.Imaging
{
internal static class NativeMethods
{
[TargetedPatchingOptOut("Internal method only, inlined across NGen boundaries for performance reasons")]
internal static unsafe void CopyUnmanagedMemory(byte* srcPtr, int srcOffset, byte* dstPtr, int dstOffset, int count)
{
srcPtr += srcOffset;
dstPtr += dstOffset;
memcpy(dstPtr, srcPtr, count);
}
[TargetedPatchingOptOut("Internal method only, inlined across NGen boundaries for performance reasons")]
internal static void SetUnmanagedMemory(IntPtr dst, int filler, int count)
{
memset(dst, filler, count);
}
// Win32 memory copy function
//[DllImport("ntdll.dll")]
[DllImport("msvcrt.dll", EntryPoint = "memcpy", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]
private static extern unsafe byte* memcpy(
byte* dst,
byte* src,
int count);
// Win32 memory set function
//[DllImport("ntdll.dll")]
//[DllImport("coredll.dll", EntryPoint = "memset", SetLastError = false)]
[DllImport("msvcrt.dll", EntryPoint = "memset", CallingConvention = CallingConvention.Cdecl, SetLastError = false)]
private static extern void memset(
IntPtr dst,
int filler,
int count);
}
}
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