---
name: "clRetainMemObject"
section: "3clc"
platform: "linux"
package: "opencl-1.2-man-doc"
version: "1.0~svn33624-5.1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/clRetainMemObject"
---

# clRetainMemObject(3clc)

Increments the memory object reference count.

## NAME

clRetainMemObject - Increments the memory object reference count.

##

**cl\_int clRetainMemObject(cl\_mem** *memobj***);**

## PARAMETERS

*memobj*

A valid memory object.

## NOTES

[**clCreateBuffer**(3clc)](/clCreateBuffer/3clc.md), [**clCreateSubBuffer**(3clc)](/clCreateSubBuffer/3clc.md), and [**clCreateImage**(3clc)](/clCreateImage/3clc.md), and perform an implicit retain.

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.

## ERRORS

Returns CL\_SUCCESS if the function is executed successfully. Otherwise, it returns one of the following errors:

• CL\_INVALID\_MEM\_OBJECT if *memobj* is a not a valid memory object (buffer or image 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.

## SPECIFICATION

**OpenCL Specification**\[1\]

## SEE ALSO

[**clCreateBuffer**(3clc)](/clCreateBuffer/3clc.md), [**clEnqueueCopyBuffer**(3clc)](/clEnqueueCopyBuffer/3clc.md), [**clEnqueueReadBuffer**(3clc)](/clEnqueueReadBuffer/3clc.md), [**clEnqueueWriteBuffer**(3clc)](/clEnqueueWriteBuffer/3clc.md), [**clReleaseMemObject**(3clc)](/clReleaseMemObject/3clc.md)

## 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 118, section 5.4.1 - Retaining and Releasing Memory Objects