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dotnet: fix problems with FullContext and GCHandle

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This commit is contained in:
Bill Zissimopoulos
2017-05-07 15:13:22 -07:00
parent 8c5d9bda20
commit bf64bcf9ba
3 changed files with 67 additions and 67 deletions
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86
src/dotnet/Interop.cs
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@ -721,61 +721,61 @@ namespace Fsp.Interop
IntPtr NativePtr,
Object Obj)
{
if (null != Obj)
Debug.Assert(IntPtr.Zero == *(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)));
GCHandle Handle = GCHandle.Alloc(Obj, GCHandleType.Weak);
*(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)) = (IntPtr)Handle;
}
internal unsafe static void DisposeUserContext(
IntPtr NativePtr)
{
IntPtr UserContext = *(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr));
Debug.Assert(IntPtr.Zero != UserContext);
if (IntPtr.Zero != UserContext)
{
Debug.Assert(IntPtr.Zero == *(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)));
GCHandle Handle = GCHandle.Alloc(Obj, GCHandleType.Weak);
*(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)) = (IntPtr)Handle;
}
else
{
IntPtr UserContext = *(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr));
if (IntPtr.Zero != UserContext)
{
GCHandle.FromIntPtr(UserContext).Free();
*(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)) = IntPtr.Zero;
}
GCHandle.FromIntPtr(UserContext).Free();
*(IntPtr *)((Byte *)NativePtr + sizeof(IntPtr)) = IntPtr.Zero;
}
}
private class FullContextHolder
{
public Object FileNode;
public Object FileDesc;
}
internal static void GetFullContext(ref FullContext FullContext,
out Object FileNode, out Object FileDesc)
{
FileNode = 0 != FullContext.UserContext ?
GCHandle.FromIntPtr((IntPtr)FullContext.UserContext).Target : null;
FileDesc = 0 != FullContext.UserContext2 ?
GCHandle.FromIntPtr((IntPtr)FullContext.UserContext2).Target : null;
FullContextHolder Holder = 0 != FullContext.UserContext2 ?
(FullContextHolder)GCHandle.FromIntPtr((IntPtr)FullContext.UserContext2).Target :
null;
if (null != Holder)
{
FileNode = Holder.FileNode;
FileDesc = Holder.FileDesc;
}
else
{
FileNode = null;
FileDesc = null;
}
}
internal static void SetFullContext(ref FullContext FullContext,
Object FileNode, Object FileDesc)
{
if (null != FileNode)
Debug.Assert(0 == FullContext.UserContext && 0 == FullContext.UserContext2);
FullContextHolder Holder = new FullContextHolder();
Holder.FileNode = FileNode;
Holder.FileDesc = FileDesc;
GCHandle Handle = GCHandle.Alloc(Holder, GCHandleType.Normal);
FullContext.UserContext2 = (UInt64)(IntPtr)Handle;
}
internal static void DisposeFullContext(ref FullContext FullContext)
{
Debug.Assert(0 == FullContext.UserContext && 0 != FullContext.UserContext2);
if (0 != FullContext.UserContext2)
{
Debug.Assert(0 == FullContext.UserContext);
GCHandle Handle = GCHandle.Alloc(FileNode, GCHandleType.Normal);
FullContext.UserContext = (UInt64)(IntPtr)Handle;
}
else
{
if (0 != FullContext.UserContext)
{
GCHandle.FromIntPtr((IntPtr)FullContext.UserContext).Free();
FullContext.UserContext = 0;
}
}
if (null != FileDesc)
{
Debug.Assert(0 == FullContext.UserContext2);
GCHandle Handle = GCHandle.Alloc(FileDesc, GCHandleType.Normal);
FullContext.UserContext2 = (UInt64)(IntPtr)Handle;
}
else
{
if (0 != FullContext.UserContext2)
{
GCHandle.FromIntPtr((IntPtr)FullContext.UserContext2).Free();
FullContext.UserContext2 = 0;
}
GCHandle.FromIntPtr((IntPtr)FullContext.UserContext2).Free();
FullContext.UserContext2 = 0;
}
}