ColossalAI/colossalai/kernel/__init__.py

from .cuda_native import FusedScaleMaskSoftmax, LayerNorm, MultiHeadAttention

try:
    from colossalai._C import fused_optim
except:
    from colossalai.kernel.op_builder.fused_optim import FusedOptimBuilder
    fused_optim = FusedOptimBuilder().load()

try:
    from colossalai._C import cpu_optim
except ImportError:
    from colossalai.kernel.op_builder import CPUAdamBuilder
    cpu_optim = CPUAdamBuilder().load()

try:
    from colossalai._C import multihead_attention
except ImportError:
    from colossalai.kernel.op_builder import MultiHeadAttnBuilder
    multihead_attention = MultiHeadAttnBuilder().load()

__all__ = [
    "fused_optim", "cpu_optim", "multihead_attention", "LayerNorm", "FusedScaleMaskSoftmax", "MultiHeadAttention"
]