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clCreateKernel - Creates a kernel object. cl_kernel clCreateKernel(cl_program program, const char *kernel_name, cl_int *errcode_ret);
program A program object with a successfully built executable. kernel_name A function name in the program declared with the __kernel qualifier errcode_ret Returns an appropriate error code. If errcode_ret is NULL, no error code is returned.
A kernel is a function declared in a program. A kernel is identified by the functionQualifiers(3clc) qualifier applied to any function in a program. A kernel object encapsulates the specific __kernel function declared in a program and the argument values to be used when executing this __kernel function.
clCreateKernel returns a valid non-zero kernel object and errcode_ret is set to CL_SUCCESS if the kernel object is created successfully. Otherwise, it returns a NULL value with one of the following error values returned in errcode_ret: · CL_INVALID_PROGRAM if program is not a valid program object. · CL_INVALID_PROGRAM_EXECUTABLE if there is no successfully built executable for program. · CL_INVALID_KERNEL_NAME if kernel_name is not found in program. · CL_INVALID_KERNEL_DEFINITION if the function definition for __kernel function given by kernel_name such as the number of arguments, the argument types are not the same for all devices for which the program executable has been built. · CL_INVALID_VALUE if kernel_name is NULL. · 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.
clCreateKernelsInProgram(3clc), clRetainKernel(3clc), clReleaseKernel(3clc), clSetKernelArg(3clc), clGetKernelInfo(3clc), clGetKernelWorkGroupInfo(3clc), classDiagram(3clc)
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1. OpenCL Specification page 157, section 5.7.1 - Creating Kernel Objects