Methods and apparatus for performing heap management and protecting data structure integrity in non-volatile memory
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United States of America Patent
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Apr 29, 1997
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N/A
app pub date -
Apr 26, 1995
filing date -
Apr 26, 1995
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Abstract
Methods and apparatus for performing heap management in programmable recording instruments used to record process data; and protecting the integrity of data structures stored in non-volatile memory included such instruments should a power failure or power shut down occur while heap management operations are in progress. Furthermore, according to the invention, methods and apparatus are provided for (a) validating the integrity of the aforementioned data structures quickly on power up of the recording instrument; (b) finishing certain predetermined processes that were in progress when a power failure occurred, at the time when the recording instrument is powered back up; (c) locating any memory allocated to a user prior to a power failure or shut down; and (d) assuring the user, whenever power is restored to the system, that only pointers to previously allocated data blocks containing valid data are provided in response to users requests for such pointers.
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