// This function walks all watched files, collects changes, and updates state
private FileChangeList ComputeChangesAndUpdateState()
{
_version++;
var changes = new FileChangeList();
WIN32_FIND_DATAW fileData = new WIN32_FIND_DATAW();
unsafe
{
WIN32_FIND_DATAW *pFileData = &fileData;
for (int index = 0; index < _directories.Count; index++)
{
var directory = _directories[index];
var handle = DllImports.FindFirstFileExW(directory, FINDEX_INFO_LEVELS.FindExInfoBasic, pFileData, FINDEX_SEARCH_OPS.FindExSearchNameMatch, IntPtr.Zero, DllImports.FIND_FIRST_EX_LARGE_FETCH);
if (handle == DllImports.INVALID_HANDLE_VALUE) // directory got deleted
{
if (Tracing.Switch.ShouldTrace(TraceEventType.Information))
{
Tracing.TraceEvent(TraceEventType.Warning, 2, "Directory could not be opened {0}", directory);
}
_directories.Remove(directory);
continue;
}
try
{
do
{
if (IsSpecial(fileData.cFileName))
{
continue;
}
if (!IsWatched(fileData.cFileName))
{
continue;
}
UpdateState(directory, ref changes, ref fileData, fileData.cFileName);
}while (DllImports.FindNextFileW(handle, pFileData));
}
finally
{
DllImports.FindClose(handle);
}
}
}
foreach (var value in _state)
{
if (value._version != _version)
{
changes.AddRemoved(value.Directory, value.Path);
_state.Remove(value.Directory, value.Path);
}
}
return(changes);
}
public static extern int FindNextFileW([NativeTypeName("HANDLE")] IntPtr hFindFile, [NativeTypeName("LPWIN32_FIND_DATAW")] WIN32_FIND_DATAW *lpFindFileData);
public static extern IntPtr FindFirstFileW([NativeTypeName("LPCWSTR")] ushort *lpFileName, [NativeTypeName("LPWIN32_FIND_DATAW")] WIN32_FIND_DATAW *lpFindFileData);
public HRESULT GetPath([NativeTypeName("LPWSTR")] ushort *pszFile, int cch, WIN32_FIND_DATAW *pfd, [NativeTypeName("DWORD")] uint fFlags)
{
return(((delegate * unmanaged <IShellLinkW *, ushort *, int, WIN32_FIND_DATAW *, uint, int>)(lpVtbl[3]))((IShellLinkW *)Unsafe.AsPointer(ref this), pszFile, cch, pfd, fFlags));
}
public static extern BOOL FindNextFileW(HANDLE hFindFile, [NativeTypeName("LPWIN32_FIND_DATAW")] WIN32_FIND_DATAW *lpFindFileData);
public HRESULT GetFindData(WIN32_FIND_DATAW *pfd)
{
return(((delegate * unmanaged <IFileSystemBindData *, WIN32_FIND_DATAW *, int>)(lpVtbl[4]))((IFileSystemBindData *)Unsafe.AsPointer(ref this), pfd));
}
public HRESULT SetFindData([NativeTypeName("const WIN32_FIND_DATAW *")] WIN32_FIND_DATAW *pfd)
{
return(((delegate * unmanaged <IFileSystemBindData *, WIN32_FIND_DATAW *, int>)(lpVtbl[3]))((IFileSystemBindData *)Unsafe.AsPointer(ref this), pfd));
}