clFlush3clc

cl_int clFlush(cl_command_queue command_queue);

Notes

Issues all previously queued OpenCL commands in command_queue to the device associated with command_queue.

clFlush only guarantees that all queued commands to command_queue will eventually be submitted to the appropriate device There is no guarantee that they will be complete after clFlush returns.

Any blocking commands queued in a command-queue and clReleaseCommandQueue(3clc) perform an implicit flush of the command-queue. These blocking commands are clEnqueueReadBuffer(3clc), clEnqueueReadBufferRect(3clc), or clEnqueueReadImage(3clc) with blocking_read set to CL_TRUE; clEnqueueWriteBuffer(3clc), clEnqueueWriteBufferRect(3clc), or clEnqueueWriteImage(3clc) with blocking_write set to CL_TRUE; clEnqueueMapBuffer(3clc) or clEnqueueMapImage(3clc) with blocking_map set to CL_TRUE; or clWaitForEvents(3clc).

To use event objects that refer to commands enqueued in a command-queue as event objects to wait on by commands enqueued in a different command-queue, the application must call a clFlush or any blocking commands that perform an implicit flush of the command-queue where the commands that refer to these event objects are enqueued.

Errors

Returns CL_SUCCESS if the function call was executed successfully. Otherwise, it returns one of the following:

Specification

OpenCL Specification[1]

Notes

1.

OpenCL Specification

page 193, section 5.13 - Flush and Finish