o ߗiV@sNUddlZddlZddlmZmZmZddlZddlmZgZ ee e d<de defddZ e ejd se ejd r.fnr )rrr r r _dummy_fn s r_gds_register_buffer_gds_deregister_buffer_gds_register_handle_gds_deregister_handle_gds_load_storage_gds_save_storagescCtj|dSzLRegisters a buffer. Args: s (Storage): Buffer to register. N)torch_Crrr r rr"cCrr)rrrrr r rr+rc@speZdZdZdedefddZddd Zdd d Zdd d Z dde deddfddZ dde deddfddZ dS)_GdsFileaWrapper around cuFile. cuFile is a file-like interface to the GPUDirect Storage (GDS) API. Args: filename (str): Name of the file to open. flags (int): Flags to pass to ``os.open`` when opening the file. ``os.O_DIRECT`` will be added automatically. .. _CUDA GPUDirect Storage Documentation: https://docs.nvidia.com/gpudirect-storage/api-reference-guide/index.html#cufile-io-api filenameflagscCsDtjdkr td||_||_t||tjB|_d|_ | dS)Nwin32z*GdsFile is not supported on this platform.) sysplatformr rr osopenO_DIRECTfdhandleregister_handle)selfrr r r r__init__Bs  z_GdsFile.__init__rNcCs"|jdur |t|jdS)N)r(deregister_handler$closer'r*r r r__del__Ks z_GdsFile.__del__cCs&|jdus Jdtj|j|_dS)zpRegisters file descriptor to cuFile Driver. This is a wrapper around ``cuFileHandleRegister``. Nz4Cannot register a handle that is already registered.)r(rrrr'r.r r rr)Ps z_GdsFile.register_handlecCs*|jdus Jdtj|jd|_dS)zvDeregisters file descriptor from cuFile Driver. This is a wrapper around ``cuFileHandleDeregister``. Nz2Cannot deregister a handle that is not registered.)r(rrrr.r r rr,Zs  z_GdsFile.deregister_handlerstorageoffsetcC(|jdus Jdtj|j||dS)amLoads data from the file into the storage. This is a wrapper around ``cuFileRead``. ``storage.nbytes()`` of data will be loaded from the file at ``offset`` into the storage. Args: storage (Storage): Storage to load data into. offset (int, optional): Offset into the file to start loading from. (Default: 0) Nz4Cannot load data from a file that is not registered.)r(rrrr*r0r1r r r load_storagee z_GdsFile.load_storagecCr2)aUSaves data from the storage into the file. This is a wrapper around ``cuFileWrite``. All bytes of the storage will be written to the file at ``offset``. Args: storage (Storage): Storage to save data from. offset (int, optional): Offset into the file to start saving to. (Default: 0) Nz2Cannot save data to a file that is not registered.)r(rrrr3r r r save_storagetr5z_GdsFile.save_storage)rN)r) __name__ __module__ __qualname____doc__strintr+r/r)r,rr4r6r r r rr4s   r)r$r"typingrrrr torch.typesrrr;__annotations__rhasattrr__dict__rrrr r r rs,