activate_compute_deviceT_activate_compute_deviceActivateComputeDeviceActivateComputeDevice (Operator)

Name

activate_compute_deviceT_activate_compute_deviceActivateComputeDeviceActivateComputeDevice — Activate a compute device.

Signature

activate_compute_device( : : DeviceHandle : )

Description

activate_compute_deviceactivate_compute_deviceActivateComputeDeviceActivateComputeDeviceActivateComputeDevice activates the compute device DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle for the current HALCON thread. All subsequent HALCON operators called in this thread are executed on DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle if they provide an implementation (see get_operator_infoget_operator_infoGetOperatorInfoGetOperatorInfoGetOperatorInfo) for this device. Use deactivate_compute_devicedeactivate_compute_deviceDeactivateComputeDeviceDeactivateComputeDeviceDeactivateComputeDevice to deactivate DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle.

Currently, only one compute device can be active for a HALCON thread. If a different device is active before activate_compute_deviceactivate_compute_deviceActivateComputeDeviceActivateComputeDeviceActivateComputeDevice is called, this device is deactivated automatically.

Execution Information

Multithreading type: reentrant (runs in parallel with non-exclusive operators).
Multithreading scope: local (may only be called from the same thread in which the window, model, or tool instance was created).
Processed without parallelization.

Parameters

DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle (input_control) compute_device → (handle)

Compute device handle.

Example (HDevelop)

open_compute_device (DeviceIdentifier, DeviceHandle)
read_image (Image, 'rings_and_nuts')
*
* Gaussian convolution on a compute device
activate_compute_device (DeviceHandle)
derivate_gauss (Image, DerivGauss, 5, 'none')
*
* Gaussian convolution on the CPU
deactivate_compute_device (DeviceHandle)
derivate_gauss (Image, DerivGauss, 5, 'none')

Result

activate_compute_deviceactivate_compute_deviceActivateComputeDeviceActivateComputeDeviceActivateComputeDevice returns the value 2 (H_MSG_TRUE) if DeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle is valid. Otherwise an exception will be raised.

Possible Predecessors

open_compute_deviceopen_compute_deviceOpenComputeDeviceOpenComputeDeviceOpenComputeDevice

Module

Foundation

Operators