system.py

system.py

# If ctypes is available, use it to find system routines for UUID generation.
_uuid_generate_random = _uuid_generate_time = _UuidCreate = None
try:
    import ctypes, ctypes.util

    # The uuid_generate_* routines are provided by libuuid on at least
    # Linux and FreeBSD, and provided by libc on Mac OS X.
    for libname in ['uuid', 'c']:
        try:
            lib = ctypes.CDLL(ctypes.util.find_library(libname))
        except:
            continue
        if hasattr(lib, 'uuid_generate_random'):
            _uuid_generate_random = lib.uuid_generate_random
        if hasattr(lib, 'uuid_generate_time'):
            _uuid_generate_time = lib.uuid_generate_time
            if _uuid_generate_random is not None:
                break  # found everything we were looking for