Blocks until all previously queued OpenCL commands in a command-queue are issued to the associated device and have completed.
| 
                    cl_int
 clFinish
                ( | cl_command_queue command_queue ) | 
          Blocks until all previously queued OpenCL commands in command_queue
          are issued to the associated device and have completed.
        
          clFinish does not return until all previously queued
          commands in command_queue have been processed and
          completed. clFinish is also a synchronization point.
        
Returns CL_SUCCESS if the function call was executed successfully. Otherwise, it returns one of the following errors:
command_queue
              is not a valid host command-queue.
             Copyright © 2007-2013 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.
Copyright © 2007-2013 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.