"""
"""

from packaging import version

from ...config import Config


try:

    import torch

except ImportError:

    _patch = lambda *args, **kwargs: None
    _unpatch = lambda *args, **kwargs: None
    _pack = lambda *args, **kwargs: 0
    _init = lambda *args, **kwargs: None
    _size = lambda *args, **kwargs: 0
    _move = lambda *args, **kwargs: None
    _is_in_bad_fork = lambda *args, **kwargs: False

else:

    # Make OMP_NUM_THREADS impact both inter-op and intra-op
    if version.parse(torch.__version__) >= version.parse('2.4'):
        num_threads = torch.get_num_threads()
        try:
            torch.set_num_interop_threads(num_threads)
        except RuntimeError: # Already set
            pass

    if Config.zero_gpu_v2:
        from . import patching as _patching
    else: # pragma: no cover
        from . import patching_legacy as _patching

    _patch = _patching.patch
    _unpatch = _patching.unpatch
    _pack = _patching.pack
    _init = _patching.init
    _size = _patching.size
    _move = _patching.move
    _is_in_bad_fork = _patching.is_in_bad_fork


patch = _patch
unpatch = _unpatch
pack = _pack
init = _init
size = _size
move = _move
is_in_bad_fork = _is_in_bad_fork