1DBM::Deep::Storage(3) User Contributed Perl DocumentationDBM::Deep::Storage(3)
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6 DBM::Deep::Storage - abstract base class for storage
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8 flush()
9 This flushes the filehandle. This takes no parameters and returns
10 nothing.
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12 is_writable()
13 This takes no parameters. It returns a boolean saying if this
14 filehandle is writable.
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16 Taken from <http://www.perlmonks.org/?node_id=691054/>.
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19 This is where the actual locking of the storage medium is performed.
20 Nested locking is supported.
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22 NOTE: It is unclear what will happen if a read lock is taken, then a
23 write lock is taken as a nested lock, then the write lock is released.
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25 Currently, the only locking method supported is flock(1). This is a
26 whole-file lock. In the future, more granular locking may be supported.
27 The API for that is unclear right now.
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29 The following methods manage the locking status. In all cases, they
30 take a DBM::Deep object and returns nothing.
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32 · lock_exclusive( $obj )
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34 Take a lock usable for writing.
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36 · lock_shared( $obj )
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38 Take a lock usable for reading.
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40 · unlock( $obj )
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42 Releases the last lock taken. If this is the outermost lock, then
43 the object is actually unlocked.
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47perl v5.30.1 2020-01-29 DBM::Deep::Storage(3)