activate_compute_deviceactivate_compute_deviceActivateComputeDeviceactivate_compute_deviceActivateComputeDeviceActivateComputeDevice (Operator)

Name

activate_compute_deviceactivate_compute_deviceActivateComputeDeviceactivate_compute_deviceActivateComputeDeviceActivateComputeDevice — Activate a compute device.

Signature

Description

activate_compute_deviceactivate_compute_deviceActivateComputeDeviceactivate_compute_deviceActivateComputeDeviceActivateComputeDevice activates the compute device DeviceHandleDeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle for the current HALCON thread. All subsequent HALCON operators called in this thread are executed on DeviceHandleDeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle if they provide an implementation (see get_operator_infoget_operator_infoGetOperatorInfoget_operator_infoGetOperatorInfoGetOperatorInfo) for this device. Use deactivate_compute_devicedeactivate_compute_deviceDeactivateComputeDevicedeactivate_compute_deviceDeactivateComputeDeviceDeactivateComputeDevice to deactivate DeviceHandleDeviceHandleDeviceHandleDeviceHandleDeviceHandledeviceHandle.

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

Parallelization

• 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

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

Possible Predecessors

open_compute_deviceopen_compute_deviceOpenComputeDeviceopen_compute_deviceOpenComputeDeviceOpenComputeDevice

See also

deactivate_compute_devicedeactivate_compute_deviceDeactivateComputeDevicedeactivate_compute_deviceDeactivateComputeDeviceDeactivateComputeDevice, deactivate_all_compute_devicesdeactivate_all_compute_devicesDeactivateAllComputeDevicesdeactivate_all_compute_devicesDeactivateAllComputeDevicesDeactivateAllComputeDevices

Module

Foundation