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CLWAITFOREVENTS(3clc) OpenCL Manual CLWAITFOREVENTS(3clc)

NAME

clWaitForEvents - Waits on the host thread for commands identified by event objects to complete.

cl_int clWaitForEvents(cl_uint num_events, const cl_event *event_list);

PARAMETERS

event_list

The events specified in event_list act as synchronization points.

NOTES

Waits on the host thread for commands identified by event objects in event_list to complete. A command is considered complete if its execution status is CL_COMPLETE or a negative value. The events specified in event_list act as synchronization points.

If the cl_khr_gl_event(3clc) extension is enabled, event objects can also be used to reflect the status of an OpenGL sync object. The sync object in turn refers to a fence command executing in an OpenGL command stream. This provides another method of coordinating sharing of buffers and images between OpenGL and OpenCL.

ERRORS

Returns CL_SUCCESS if the execution status of all events in event_list is CL_COMPLETE. Otherwise, it returns one of the following errors:

•CL_INVALID_VALUE if num_events is zero or event_list is NULL..

•CL_INVALID_CONTEXT if events specified in event_list do not belong to the same context.

•CL_INVALID_EVENT if event objects specified in event_list are not valid event objects.

•CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST if the execution status of any of the events in event_list is a negative integer value.

•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.

SPECIFICATION

OpenCL Specification[1]

SEE ALSO

clGetEventInfo(3clc), clReleaseEvent(3clc), clRetainEvent(3clc), cl_khr_gl_event(3clc)

AUTHORS

The Khronos Group

COPYRIGHT

Copyright © 2007-2011 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.

NOTES

1.
OpenCL Specification
page 179, section 5.9 - Event Objects
11/18/2024 The Khronos Group