clGetMemObjectInfo

Used to get information that is common to all memory objects (buffer and image objects).

`cl_int clGetMemObjectInfo (`	cl_mem `memobj`,
	cl_mem_info `param_name`,
	size_t `param_value_size`,
	void `*param_value`,
	size_t `*param_value_size_ret)`

Parameters

memobj

Specifies the memory 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 clGetMemObjectInfo is described in the table below.

cl_mem_info	Return Type	Info. returned in `param_value`
`CL_MEM_TYPE`	cl_mem_object_type	Returns `CL_MEM_OBJECT_BUFFER` if `memobj` is created with clCreateBuffer, `CL_MEM_OBJECT_IMAGE2D` if `memobj` is created with clCreateImage2D or `CL_MEM_OBJECT_IMAGE3D` if `memobj` is created with clCreateImage3D.
`CL_MEM_FLAGS`	cl_mem_flags	Return the `flags` argument value specified when `memobj` is created with clCreateBuffer, clCreateImage2D, or clCreateImage3D.
`CL_MEM_SIZE`	size_t	Return actual size of `memobj` in bytes.
`CL_MEM_HOST_PTR`	void *	Return the `host_ptr` argument value specified when `memobj` is created.
`CL_MEM_MAP_COUNT`	cl_uint	Map count. The map count returned should be considered immediately stale. It is unsuitable for general use in applications. This feature is provided for debugging.
`CL_MEM_REFERENCE_COUNT`	cl_uint	Return `memobj` 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_MEM_CONTEXT`	cl_context	Return context specified when memory object is created.

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 greater than or equal to size of return type as described in the table above.

param_value_size_ret

Returns the actual size in bytes of data being queried by param_value. If param_value_size_ret is NULL, it is ignored.

Errors

clGetMemObjectInfo returns CL_SUCCESS if the function is executed successfully, returns CL_INVALID_VALUE if param_name is not valid, or if size in bytes specified by param_value_size is less than the size of return type as described in the table above and param_value is not NULL, and returns CL_INVALID_MEM_OBJECT if memobj is a not a valid image object.

Specification

OpenCL Specification

Also see

clGetImageInfo

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