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import ctypes as ct
import os
from warnings import warn
from bitsandbytes.cuda_setup import evaluate_cuda_setup
class CUDALibrary_Singleton(object):
_instance = None
def __init__(self):
raise RuntimeError('Call get_instance() instead')
def initialize(self):
self.context = {}
binary_name = evaluate_cuda_setup()
if not os.path.exists(os.path.dirname(__file__) + f'/{binary_name}'):
print(f'TODO: compile library for specific version: {binary_name}')
print('defaulting to libbitsandbytes.so')
self.lib = ct.cdll.LoadLibrary(os.path.dirname(__file__) + '/libbitsandbytes.so')
else:
self.lib = ct.cdll.LoadLibrary(os.path.dirname(__file__) + f'/{binary_name}')
@classmethod
def get_instance(cls):
if cls._instance is None:
cls._instance = cls.__new__(cls)
cls._instance.initialize()
return cls._instance
lib = CUDALibrary_Singleton.get_instance().lib
try:
lib.cadam32bit_g32
lib.get_context.restype = ct.c_void_p
lib.get_cusparse.restype = ct.c_void_p
COMPILED_WITH_CUDA = True
except AttributeError:
warn("The installed version of bitsandbytes was compiled without GPU support. "
"8-bit optimizers and GPU quantization are unavailable.")
COMPILED_WITH_CUDA = False
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