topic OpenCL callback function in OpenCL* for CPU

OpenCL callback function

Shweta_Shree — Mon, 12 Sep 2011 10:47:16 GMT

void CL_CALLBACK myCallback( cl_event event,cl_int cmd_exec_status, void *user_data)

is giving an error on compilation.

Also, clSetEventCallback() statement is giving an error 'clSetEventCallback' identifier not found.
Does this mean that Intel SDK does not support callback functions?

OpenCL callback function

Evgeny_F_Intel — Mon, 12 Sep 2011 13:32:49 GMT

Hi,

Intel SDK does support callback functions.

Can you provide more details on the problem?

Which development environment are you using?
Problematic code sample?

Thanks,
Evgeny

OpenCL callback function

Shweta_Shree — Thu, 15 Sep 2011 10:23:49 GMT

Thank you Evgeny.
Sorry for the delayed reply.

Environment:
OS: Windows
CPU: Intel Core 2 Duo

Sample Code:

#include

#include "cl.h"

void CL_CALLBACK myCallback(cl_event evnt,cl_int cmd_sts,void *user_data);

int main(int argc, char** argv)

{

/* Find platform and devices
Create Context, Command queue, program andkernel.
Set arguments to the kernel
*/

ret = clEnqueueNDRangeKernel(cqCommandQueue, ckKernel, 1, NULL, &global_item_size, &local_item_size, 0, NULL, &event1);

ret = clSetEventCallback(event1, CL_COMPLETE, &myCallback, NULL);

/* Read result from buffer
Release resources.
*/

}

void myCallback(cl_event evnt,cl_int cmd_sts,void *user_data)

{

/* Do something */

}

OpenCL callback function

Evgeny_F_Intel — Thu, 15 Sep 2011 13:01:51 GMT

The code looks fine.

Please check location of the cl.h.

Is it coming from Intel SDK?

OpenCL callback function

IDZ_A_Intel — Thu, 15 Sep 2011 13:16:22 GMT

Oh thanks!

I just noticed that I had 2 cl.h files.
I did not check if they were different because i assumed, no matter what the .h files would be the same.

Thanks once again.