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clCreateUserEvent.adoc

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clCreateUserEvent

Creates a user event object.

cl_event clCreateUserEvent(cl_context context,
                           cl_int *errcode_ret)

Parameters

context

A valid OpenCL context.

errcode_ret

Returns an appropriate error code. If errcode_ret is NULL, no error code is returned.

Notes

User events allow applications to enqueue commands that wait on a user event to finish before the command is executed by the device.

The execution status of the user event object created is set to CL_SUBMITTED.

Errors

Returns a valid non-zero event object and errcode_ret is set to CL_SUCCESS if the user event object is created successfully. Otherwise, it returns a NULL value with one of the following error values returned in errcode_ret:

  • CL_INVALID_CONTEXT if context is not a valid context.

  • 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.