#define SILC_PTR_TO_64 ...

    Type casts a pointer's value into a 64-bit integer.  Use this to
    avoid compiler warnings when type casting pointers to integers
    of different size.

    #if SILC_SIZEOF_VOID_P < 8
    #define SILC_PTR_TO_64(_ptr__) ((SilcUInt64)((SilcUInt32)(_ptr__)))
    #else
    #define SILC_PTR_TO_64(_ptr__) ((SilcUInt64)((SilcUInt64)(_ptr__)))
    #endif