HasFreeMemory

SuggestionsForDiscarding

Attributes

BytesNeededToRecoverFromLowMemory DisplayedTotalFreeBytes LowOnMemory OutOfMemory PercentUsed TotalFreeBytes TotalFreeKBytes TotalSize

Fields

Define Class HasFreeMemory;
    mixes in with Object;

    attribute TotalFreeBytes: Unsigned, readOnly, noGetter;
    attribute TotalSize: Unsigned, readOnly, noGetter;

    attribute DisplayedTotalFreeBytes: Unsigned, readOnly, noGetter;
        // returns TotalFreeBytes, except if low or out of memory, in which case returns zero
    attribute TotalFreeKBytes: Unsigned, readOnly, noGetter;
        // returns DisplayedTotalFreeBytes / 1024
    attribute PercentUsed: Fixed, readOnly, noGetter;
        // returns DisplayedTotalFreeBytes as % of TotalSize
    attribute BytesNeededToRecoverFromLowMemory: Unsigned, readOnly, noGetter;
        // used by the low on memory display, while the DisplayedTotalFreeBytes is pinned to
        // zero to show how much more the user needs to throw away to recover from low on memory

    // add heap statistics interface here

    attribute LowOnMemory: Boolean, noGetter, noSetter;
        // in low memory state, trying to recover
        // inheritor provides boolean field, setter and getter
    attribute OutOfMemory: Boolean, noGetter, noSetter;
        // in out of memory state, trying to recover
        // inheritor provides boolean field, setter and getter
    operation SuggestionsForDiscarding(), noMethod;
        // enter the purging scene and create suggestions for discarding from objects on
        // <self>.
end class;