C Specification

To wait for completion of commands on a device, call the function

// Provided by CL_VERSION_1_0
cl_int clFinish(
    cl_command_queue command_queue);

Parameters

  • command_queue is the command-queue to wait for.

Description

All previously queued OpenCL commands in command_queue are issued to the associated device, and the function blocks until all previously queued commands have completed. clFinish does not return until all previously queued commands in command_queue have been processed and completed. clFinish is also a synchronization point.

clFinish returns CL_SUCCESS if the function call was executed successfully. Otherwise, it returns one of the following errors:

  • CL_INVALID_COMMAND_QUEUE if command_queue is not a valid host command-queue.

  • CL_OUT_OF_RESOURCES if there is a failure to allocate resources required by the OpenCL implementation on the device.

  • CL_OUT_OF_HOST_MEMORY if there is a failure to allocate resources required by the OpenCL implementation on the host.

See Also

CL_VERSION_1_0, cl_command_queue

Document Notes

For more information, see the OpenCL Specification

This page is extracted from the OpenCL Specification. Fixes and changes should be made to the Specification, not directly.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0