internal static unsafe SafeFileHandle Open(string fullPath, FileMode mode, FileAccess access, FileShare share, FileOptions options, long preallocationSize)
{
using (DisableMediaInsertionPrompt.Create())
{
// we don't use NtCreateFile as there is no public and reliable way
// of converting DOS to NT file paths (RtlDosPathNameToRelativeNtPathName_U_WithStatus is not documented)
SafeFileHandle fileHandle = CreateFile(fullPath, mode, access, share, options);
if (FileStreamHelpers.ShouldPreallocate(preallocationSize, access, mode, fileHandle))
{
Preallocate(fullPath, preallocationSize, fileHandle);
}
if ((options & FileOptions.Asynchronous) != 0)
{
// the handle has not been exposed yet, so we don't need to aquire a lock
fileHandle.InitThreadPoolBinding();
}
return(fileHandle);
}
}
