►Open  CL
►1 C API Reference
▼1.2 The Open  CL Platform Layer
On this page:
cl  Create  Context
cl  Create  Context  From  Type
cl  Retain  Context
cl  Release  Context
cl  Get  Context  Info
cl  Get  Context  Info:  length
cl  Get  Context  Info:  _  cl_  uint
cl  Get  Context  Info:  _  cl_  device_  id*
cl  Get  Context  Info:  _  cl_  context_  properties*
cl  Get  Context  Info/  c
cl  Get  Context  Info:  generic
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1.2.3 Contexts🔗ℹ

 (require opencl/c/4-3) package: opencl

procedure

(clCreateContext properties devices) → _cl_context/c

  properties : (or/c #f (vectorof _cl_context_properties/c))
  devices : (vectorof _cl_device_id/c)

procedure

(clCreateContextFromType properties    
  device_type) → _cl_context/c
  properties : (or/c #f (vectorof _cl_context_properties/c))
  device_type : _cl_device_type/c

procedure

(clRetainContext ctxt) → void

  ctxt : _cl_context/c

procedure

(clReleaseContext ctxt) → void

  ctxt : _cl_context/c

value

clGetContextInfo : procedure?

A dummy Racket function that refers callers to the other clGetContextInfo-based functions which access the true C function.

procedure

(clGetContextInfo:length context    
  param_name) → _size_t/c
  context : _cl_context/c
  param_name : _cl_context_info/c
Returns the size of param_name field of the argument(s). Calls clGetContextInfo with values for param_value_size and param_value such that param_value_size_ret is queried.

procedure

(clGetContextInfo:_cl_uint context    
  param_name) → _cl_uint/c
  context : _cl_context/c
  param_name : _cl_context_info/c
Returns the value associated with param_name for the argument(s). Implemented by clGetContextInfo with param_value_size set to (ctype-sizeof _cl_uint) so that the value is queried. Valid param_names are '(CL_CONTEXT_REFERENCE_COUNT).

procedure

(clGetContextInfo:_cl_device_id* context 
  param_name 
  param_value_size) 
 → _cl_device_id_vector/c
  context : _cl_context/c
  param_name : _cl_context_info/c
  param_value_size : _size_t/c
Returns the value associated with param_name for the argument(s). Implemented by clGetContextInfo with param_value_size passed explicitly. Valid param_names are '(CL_CONTEXT_DEVICES).

procedure

(clGetContextInfo:_cl_context_properties* context 
  param_name 
  param_value_size) 
 → _cl_context_properties_vector/c
  context : _cl_context/c
  param_name : _cl_context_info/c
  param_value_size : _size_t/c
Returns the value associated with param_name for the argument(s). Implemented by clGetContextInfo with param_value_size passed explicitly. Valid param_names are '(CL_CONTEXT_PROPERTIES).

value

clGetContextInfo/c : contract?

A contract for the return values of clGetContextInfo:generic. Its definition is: (or/c _cl_uint/c _cl_device_id_vector/c _cl_context_properties_vector/c).

procedure

(clGetContextInfo:generic context    
  param_name) → clGetContextInfo/c
  context : _cl_context/c
  param_name : _cl_context_info/c
Returns the value associated with param_name for the argument(s). Selects the appropriate clGetContextInfo-based function to extract the appropriate value, automatically providing the right length for variable length functions.

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