Work-Item Built-In Functions

Click an item in the table below for details about that function.

get_work_dim Number of dimensions in use
get_global_size Number of global work items
get_global_id Global work item ID value
get_local_size Number of local work items
get_local_id Local work item ID
get_num_groups Number of work groups
get_group_id Work group ID


Built-in work-item functions can be used to query the number of dimensions, the global and local work size specified to clEnqueueNDRangeKernel, and the global and local identifier of each work-item when this kernel is being executed on a device. The number of dimensions, the global and local work size when executing a kernel using the function clEnqueueTask is one.


OpenCL Specification

Also see

clEnqueueNDRangeKernel, clEnqueueTask

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