Time Stamping
All time stamps on files are stamped and propagated to other SFTs when the
file is closed or committed (flushed). If a file is opened at time 1,
written to at time 2, and closed at time 3, the last write time will be
time 3. Subdirectories only have creation time stamps.
The sfi_tstamp field of the file instance structure sffsi contains six
flags :
Name Value Description
----------------------------------------------------------------
ST_SCREAT 1 stamp creation time
----------------------------------------------------------------
ST_PCREAT 2 propagate creation time
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ST_SWRITE 4 stamp last write time
----------------------------------------------------------------
ST_PWRITE 8 propagate last write time
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ST_SREAD 16 stamp last read time
----------------------------------------------------------------
ST_PREAD 32 propagate last read time
These flags are cleared when an SFT is created, and some of them may
eventually be set by a file system worker routine. They are examined when
the file is closed or flushed.
For each time stamp, there are three meaningful actions:
ST_Sxxx ST_Pxxx Action
--------------------------------------------------------------
clear clear don't do anything
--------------------------------------------------------------
set set stamp and propagate (to other SFTs and
disk)
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clear set don't stamp, but propagate existing
value
Created using Inf-PHP v.2 (c) 2003 Yuri Prokushev
Created using Inf-HTML v.0.9b (c) 1995 Peter Childs