Provided by: opencl-1.2-man-doc_1.0~svn22836-1.1_all 
NAME
clGetKernelArgInfo - Returns information about the arguments of a kernel.
cl_int clGetKernelArgInfo(cl_kernel kernel, cl_uint arg_indx,
cl_kernel_arg_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.
arg_indx
The argument index. Arguments to the kernel are referred by indices that go from 0 for
the leftmost argument to n - 1, where n is the total number of arguments declared by a
kernel.
param_name
Specifies the argument information to query. The list of supported param_name types
and the information returned in param_value by clGetKernelArgInfo 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_arg_info │ Return Type │ Info. returned in │
│ │ │ param_value │
├────────────────────────────────┼───────────────────┼────────────────────────────────────────────────┤
│CL_KERNEL_ARG_ADDRESS_QUALIFIER │ cl_kernel_arg_- │ Returns the address │
│ │ address_qualifier │ qualifier specified for │
│ │ │ the argument given by │
│ │ │ arg_indx. This can be │
│ │ │ one of the following │
│ │ │ values: │
│ │ │ │
│ │ │ CL_KERNEL_ARG_ADDRESS_GLOBAL │
│ │ │ CL_KERNEL_ARG_ADDRESS_LOCAL │
│ │ │ CL_KERNEL_ARG_ADDRESS_CONSTANT │
│ │ │ CL_KERNEL_ARG_ADDRESS_PRIVATE │
│ │ │ │
│ │ │ │
│ │ │ If no address │
│ │ │ qualifier is │
│ │ │ specified, │
│ │ │ the default │
│ │ │ address │
│ │ │ qualifier │
│ │ │ which is │
│ │ │ CL_KERNEL_ARG_ADDRESS_PRIVATE │
│ │ │ is returned. │
├────────────────────────────────┼───────────────────┼────────────────────────────────────────────────┤
│CL_KERNEL_ARG_ACCESS_QUALIFIER │ cl_kernel_arg_- │ Returns the access qualifier specified for │
│ │ access_qualifier │ the argument given by arg_indx. This can be │
│ │ │ one of the following values: │
│ │ │ │
│ │ │ CL_KERNEL_ARG_ACCESS_READ_ONLY │
│ │ │ CL_KERNEL_ARG_ACCESS_WRITE_ONLY │
│ │ │ CL_KERNEL_ARG_ACCESS_READ_WRITE │
│ │ │ CL_KERNEL_ARG_ACCESS_NONE │
│ │ │ │
│ │ │ │
│ │ │ If argument is not an image type, │
│ │ │ CL_KERNEL_ARG_ACCESS_NONE is │
│ │ │ returned. If argument is an image │
│ │ │ type, the access qualifier │
│ │ │ specified or the default access │
│ │ │ qualifier is returned. │
├────────────────────────────────┼───────────────────┼────────────────────────────────────────────────┤
│CL_KERNEL_ARG_TYPE_NAME │ char[] │ Returns the type name specified for the │
│ │ │ argument given by arg_indx. The type name │
│ │ │ returned will be the argument type name as it │
│ │ │ was declared with any whitespace removed. If │
│ │ │ argument type name is an unsigned scalar type │
│ │ │ (i.e. unsigned char, unsigned short, unsigned │
│ │ │ int, unsigned long), uchar, ushort, uint and │
│ │ │ ulong will be returned. The argument type name │
│ │ │ returned does not include any type qualifiers. │
├────────────────────────────────┼───────────────────┼────────────────────────────────────────────────┤
│CL_KERNEL_ARG_TYPE_QUALIFIER │ cl_kernel_arg- │ Returns the type qualifier specified for the │
│ │ type_qualifier │ argument given by arg_indx. The returned value │
│ │ │ can be: CL_KERNEL_ARG_TYPE_CONST, │
│ │ │ CL_KERNEL_ARG_TYPE_RESTRICT, │
│ │ │ CL_KERNEL_ARG_TYPE_VOLATILE, a combination of │
│ │ │ the above enums or CL_KERNEL_ARG_TYPE_NONE. │
│ │ │ │
│ │ │ │
│ │ │ │
│ │ │ NOTE: CL_KERNEL_ARG_TYPE_VOLATILE is returned │
│ │ │ if the argument is a pointer and the pointer │
│ │ │ is declared with the volatile qualifier. │
├────────────────────────────────┼───────────────────┼────────────────────────────────────────────────┤
│CL_KERNEL_ARG_NAME │ char[] │ Returns the name specified for the argument │
│ │ │ given by arg_indx. │
└────────────────────────────────┴───────────────────┴────────────────────────────────────────────────┘
param_value_size_ret
Returns the actual size in bytes of data copied to param_value. If
param_value_size_ret is NULL, it is ignored.
NOTES
Kernel argument information is only available if the program object associated with kernel
is created with clCreateProgramWithSource(3clc) and the program executable is built with
the -cl-kernel-arg-info option specified in options argument to clBuildProgram(3clc) or
clCompileProgram(3clc).
ERRORS
Returns CL_SUCCESS if the function is executed successfully. Otherwise, it returns one of
the following errors:
· CL_INVALID_ARG_INDEX if arg_indx is not a valid argument index.
· 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_KERNEL_ARG_INFO_NOT_AVAILABLE if the argument information is not available for
kernel.
· CL_INVALID_KERNEL if kernel is not a valid kernel object.
SPECIFICATION
OpenCL Specification[1]
SEE ALSO
clCreateKernel(3clc), clGetKernelInfo(3clc), clCreateKernelsInProgram(3clc),
clRetainKernel(3clc), clReleaseKernel(3clc), clSetKernelArg(3clc),
clGetKernelWorkGroupInfo(3clc)
AUTHORS
The Khronos Group
COPYRIGHT
Copyright © 2007-2011 The Khronos Group Inc.
Permission is hereby granted, free of charge, to any person obtaining a copy of this
software and/or associated documentation files (the "Materials"), to deal in the Materials
without restriction, including without limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of the Materials, and to permit
persons to whom the Materials are furnished to do so, subject to the condition that this
copyright notice and permission notice shall be included in all copies or substantial
portions of the Materials.
NOTES
1. OpenCL Specification
page 166, section 5.7.3 - Kernel Object Queries (updated for 1.2 rev 14)