C Specification

To create a user event object, call the function

cl_event clCreateUserEvent(
    cl_context context,
    cl_int* errcode_ret);
clCreateUserEvent is missing before version 1.1.

Parameters

  • context must be a valid OpenCL context.

  • errcode_ret will return an appropriate error code. If errcode_ret is NULL, no error code is returned.

Description

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

clCreateUserEvent 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.

The initial execution status for the user event object is CL_SUBMITTED.

See Also

Document Notes

For more information, see the OpenCL Specification

This page is extracted from the OpenCL Specification. Fixes and changes should be made to the Specification, not directly.

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