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#######################################################
# Copyright (c) 2015, ArrayFire
# All rights reserved.
#
# This file is distributed under 3-clause BSD license.
# The complete license agreement can be obtained at:
# http://arrayfire.com/licenses/BSD-3-Clause
########################################################
"""
Functions specific to CUDA backend.
This module provides interoperability with other CUDA libraries.
"""
def get_stream(idx):
"""
Get the CUDA stream used for the device `idx` by ArrayFire.
Parameters
----------
idx : int.
Specifies the index of the device.
Returns
-----------
stream : integer denoting the stream id.
"""
import ctypes as ct
from .util import safe_call as safe_call
from .library import backend as backend
if (backend.name() != "cuda"):
raise RuntimeError("Invalid backend loaded")
stream = ct.c_void_p(0)
safe_call(backend.get().afcu_get_stream(ct.pointer(stream), idx))
return stream.value
def get_native_id(idx):
"""
Get native (unsorted) CUDA device ID
Parameters
----------
idx : int.
Specifies the (sorted) index of the device.
Returns
-----------
native_idx : integer denoting the native cuda id.
"""
import ctypes as ct
from .util import safe_call as safe_call
from .library import backend as backend
if (backend.name() != "cuda"):
raise RuntimeError("Invalid backend loaded")
native = ct.c_int(0)
safe_call(backend.get().afcu_get_native_id(ct.pointer(native), idx))
return native.value
def set_native_id(idx):
"""
Set native (unsorted) CUDA device ID
Parameters
----------
idx : int.
Specifies the (unsorted) native index of the device.
"""
import ctypes as ct
from .util import safe_call as safe_call
from .library import backend as backend
if (backend.name() != "cuda"):
raise RuntimeError("Invalid backend loaded")
safe_call(backend.get().afcu_set_native_id(idx))
return
|
