Apple Inc.
PURGEABLE MEMORY MAPPED FILES

Abstract:

A device implementing purgeable memory mapped files includes at least one processor configured to receive a first request to store a first data object in volatile memory in association with a copy of the first data object stored in non-volatile memory, the first request indicating to lock the copy in the non-volatile memory. The processor is further configured to provide for storing the first data object in the volatile memory, and lock the copy stored in the non-volatile memory. The processor is further configured to receive a second request associated with clearing a portion of the non-volatile memory, provide an indication that a second data object is available for deletion from the non-volatile memory when the first data object is locked, and provide an indication that the first data object is available for deletion from the non-volatile memory when the first data object has been unlocked.