DME Boot Process

[pzaino]

The whole thing is composed by a number of pieces each of which may have different needs at initialisation time.

For instance, Launchpad may (or may not) need to scan ResourceFS (this depends if the user has decided to use RISC OS old ResourceFS based Apps approach or not). LaunchPad will always need to read its ObjectDB file (if present) and for each entry in the ObjDB, it will need to read the !Boot info and verify that that entry still exists.

So, I am trying to implement a fully multi-tasking initialisation of each component that may result in something like:

gantt
    section DME Components Boot
    axisFormat taskTime
    Total boot   :done,    des1, 0s,6s
    DeskRes      :active,  des2, 0s, 2s
    DeskCfg      :         des3, after des2, 1s
    PowerFiler   :         des4, after des3, 1s
    LaunchPad   :         des5, after des3, 3s
    Notifications:         des6, after des4, 2s

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Obviously RISC OS may not have a performance boost from this, but it may help to get to a usable Desktop in less time than by using single task initialisation for each component.

Timing is indicative only right now, 'cause it will depends on each component when completed, the amount of data required to initialise, the platform and the FileSystem performance for each different media type.