Does Mac OS have a way to create anonymous file associations?

Question

In the UNIX world, the standard way to create a file mapping object supported by RAM or a page file, rather than a disk file, is to call shm_open. This creates a memory mapping with the name and returns a file descriptor that you can pass to mmap.

The problem is that it creates a name. It would be nice if I could create an anonymous memory mapping. This would solve two problems:

• This will avoid problems when two instances of the same program can stomp each other in the mapped files.
• If a program crashes or otherwise abruptly terminates, it will not leave a shared memory object. Calling shm_unlinkimmediately after shm_openis one of the possibilities, but it leaves a small window in which a sudden termination will leave the object around until the next reboot.

Linux exists memfd_createto solve this problem. Similarly, Windows allows you to pass a null name CreateFileMappingWto create an anonymous mapping.

Is there an equivalent for Mac OS?