Memory availability warning levels.
Note that because new values might be added, it is recommended that applications check #GMemoryMonitorWarningLevel as ranges, for example: |[ if (warning_level > G_MEMORY_MONITOR_WARNING_LEVEL_LOW) drop_caches (); ]|
Memory on the device is low, processes should free up unneeded resources (for example, in-memory caches) so they can be used elsewhere.
Same as @G_MEMORY_MONITOR_WARNING_LEVEL_LOW but the device has even less free memory, so processes should try harder to free up unneeded resources. If your process does not need to stay running, it is a good time for it to quit.
The system will soon start terminating processes to reclaim memory, including background processes.
.g_type : UInt64
Returns the type id (GType) registered in GLib type system.