@deprecated This method is only for compatibility purpose. You should remove all the calls after migration to MMKV. MMKV doesn't rely on apply() to sa

Save all mmap memory to file asynchronously. No need to call this unless you worry about the device running out of battery.

backup one MMKV instance to dstDir @param mmapID the MMKV ID to backup @param dstDir the backup destination directory

check existence of the MMKV file @param mmapID The unique ID of the MMKV instance.

assuming m_file is valid

@deprecated This method is only for compatibility purpose. You should remove all the calls after migration to MMKV. MMKV doesn't rely on commit() to s

copy to a temp file then rename it this is the best we can do on Win32

do it by sendfile()