clGetKernelInfo

Returns information about the kernel object.

`cl_int clGetKernelInfo (`	cl_kernel `kernel` ,
	cl_kernel_info `param_name` ,
	size_t `param_value_size` ,
	void `*param_value` ,
	size_t `*param_value_size_ret` `)`

Parameters

kernel

Specifies the kernel object being queried.

param_name

Specifies the information to query. The list of supported param_name types and the information returned in param_value by clGetKernelInfo is described in the table below.

param_value

A pointer to memory where the appropriate result being queried is returned. If param_value is NULL, it is ignored.

param_value_size

Used to specify the size in bytes of memory pointed to by param_value. This size must be ≥ size of return type as described in the table below.

cl_kernel_info	Return Type	Info. returned in `param_value`
`CL_KERNEL_FUNCTION_NAME`	char[]	Return the kernel function name.
`CL_KERNEL_NUM_ARGS`	cl_uint	Return the number of arguments to `kernel`.
`CL_KERNEL_REFERENCE_COUNT`	cl_uint	Return the `kernel` reference count. The reference count returned should be considered immediately stale. It is unsuitable for general use in applications. This feature is provided for identifying memory leaks.
`CL_KERNEL_CONTEXT`	cl_context	Return the context associated with `kernel`.
`CL_KERNEL_PROGRAM`	cl_program	Return the program object associated with `kernel`.
`CL_KERNEL_ATTRIBUTES`	char[]	Returns any attributes specified using the __attribute__ qualifier with the kernel function declaration in the program source. These attributes include those on the __attribute__ page and other attributes supported by an implementation. Attributes are returned as they were declared inside __attribute__((...)), with any surrounding whitespace and embedded newlines removed. When multiple attributes are present, they are returned as a single, space delimited string.

param_value_size_ret

the actual size in bytes of data copied to param_value. If param_value_size_ret is NULL, it is ignored.

Errors

Returns CL_SUCCESS if the function is executed successfully. Otherwise, it returns one of the following errors:

CL_INVALID_VALUE if param_name is not valid, or if size in bytes specified by param_value_size is < size of return type as described in the table above and param_value is not NULL.
CL_INVALID_KERNEL if kernel is not a valid kernel object.
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.

Specification

OpenCL Specification

Also see

clCreateKernel, clCreateKernelsInProgram, clGetKernelArgInfo, clRetainKernel, clReleaseKernel, clSetKernelArg, clGetKernelWorkGroupInfo

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