C Specification

To release a memory object, call the function

// Provided by CL_VERSION_1_0
cl_int clReleaseMemObject(
    cl_mem memobj);

Parameters

  • memobj specifies the memory object to be released.

Description

The memobj reference count is decremented.

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

  • CL_INVALID_MEM_OBJECT if memobj is not a valid memory object.

  • 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.

After the memobj reference count becomes zero and commands queued for execution on a command-queue(s) that use memobj have finished, the memory object is deleted. If memobj is a buffer object, memobj cannot be deleted until all sub-buffer objects associated with memobj are deleted. Using this function to release a reference that was not obtained by creating the object or by calling clRetainMemObject causes undefined behavior.

See Also

CL_VERSION_1_0, cl_mem

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.

Copyright

Copyright 2014-2025 The Khronos Group Inc.

SPDX-License-Identifier: CC-BY-4.0