Decrements the command_queue reference count.

cl_int clReleaseCommandQueue( cl_command_queue command_queue)



Specifies the command-queue to release.


After the command_queue reference count becomes zero and all commands queued to command_queue have finished (e.g., kernel executions, memory object updates, etc.), the command-queue is deleted.

clReleaseCommandQueue performs an implicit flush to issue any previously queued OpenCL commands in command_queue. Using this function to release a reference that was not obtained by creating the object or by calling clRetainCommandQueue causes undefined behavior.


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

  • CL_INVALID_COMMAND_QUEUE if command_queue is not a valid command queue.
  • 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.


OpenCL Specification

Also see

clCreateCommandQueueWithProperties, clGetCommandQueueInfo, clRetainCommandQueue

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