ReadAtOffsetAsync()

static ValueTask< int > System.IO.RandomAccess.ReadAtOffsetAsync ( SafeFileHandle handle, Memory< byte > buffer, long fileOffset, CancellationToken cancellationToken, OSFileStreamStrategy strategy = null )

inlinestaticpackage

Definition at line 374 of file RandomAccess.cs.

    {
        if (handle.IsAsync)
        {
            var (overlappedValueTaskSource, num) = QueueAsyncReadFile(handle, buffer, fileOffset, cancellationToken, strategy);
            if (overlappedValueTaskSource != null)
            {
                return new ValueTask<int>(overlappedValueTaskSource, overlappedValueTaskSource.Version);
            }
            if (num == 0)
            {
                return ValueTask.FromResult(0);
            }
            return ValueTask.FromException<int>(Win32Marshal.GetExceptionForWin32Error(num, handle.Path));
        }
        return ScheduleSyncReadAtOffsetAsync(handle, buffer, fileOffset, cancellationToken, strategy);
    }

References System.IO.RandomAccess.buffer, System.IO.RandomAccess.cancellationToken, System.IO.RandomAccess.fileOffset, System.Threading.Tasks.ValueTask< TResult >.FromException(), System.IO.Win32Marshal.GetExceptionForWin32Error(), System.handle, System.IO.RandomAccess.ScheduleSyncReadAtOffsetAsync(), and System.IO.RandomAccess.strategy.

Referenced by System.IO.Strategies.OSFileStreamStrategy.ReadAsync(), System.IO.RandomAccess.ReadAsync(), and System.IO.RandomAccess.ReadScatterAtOffsetMultipleSyscallsAsync().