Silverlight 5 中 UnsafeAddrOfPinnedArrayElement 的等效项

发布于 2024-12-23 08:41:31 字数 597 浏览 3 评论 0原文

我正在尝试将一些 pInvoke 方法调用转换为 Silverlight 5，但遇到了问题。我将如何执行与在 Silverlight 5 中调用 UnsafeAddrOfPinnedArrayElement 等效的操作？

 public int Read(byte[] buffer, int index, int length)
    {
        var gch = GCHandle.Alloc(buffer);
        try
        {
             //Desktop .NET Framework code:              
             //var ptr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, index);

             //WHAT IS THE SL 5 Equivalent here?

             //TODO Call some pinvoke code that requires 'ptr'

        }
        finally
        {
            gch.Free();
        }
    }

原文

I'm trying to convert some pInvoke method calls to Silverlight 5 but have come up against a problem.How would I do the equivalent of calling UnsafeAddrOfPinnedArrayElement in Silverlight 5?

 public int Read(byte[] buffer, int index, int length)
    {
        var gch = GCHandle.Alloc(buffer);
        try
        {
             //Desktop .NET Framework code:              
             //var ptr = Marshal.UnsafeAddrOfPinnedArrayElement(buffer, index);

             //WHAT IS THE SL 5 Equivalent here?

             //TODO Call some pinvoke code that requires 'ptr'

        }
        finally
        {
            gch.Free();
        }
    }

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战皆罪 2024-12-30 08:41:31

从我读到的内容来看，UnsafeAddrOfPinnedArrayElement 只是获取数组中元素的内存地址，为什么不自己实现呢？您还可以避免再次分配整个缓冲区......

public int Read(byte[] buffer, int index, int length)
{
    unsafe
    {
        fixed(byte *ptr = buffer)
        {
            byte *ptr = ptr + index;
        }
    }
}

From what I'm reading UnsafeAddrOfPinnedArrayElement is just getting the memory address of an element in an array, why not just implement it yourself? You'll also avoid having to allocate the entire buffer a second time...

public int Read(byte[] buffer, int index, int length)
{
    unsafe
    {
        fixed(byte *ptr = buffer)
        {
            byte *ptr = ptr + index;
        }
    }
}

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