Difference between revisions of "SET PCLOCKING"
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==Purpose== | ==Purpose== | ||
Determine whether multiple locks may be applied | Determine whether multiple locks may be applied | ||
| Line 15: | Line 8: | ||
==See Also== | ==See Also== | ||
| − | [[ | + | [[ACCESS()]], [[APPEND]], [[CHANGE]], [[DB_FOXPLUSBUGS]], [[DB_FOXPROKEYS]], [[DB_SAMBA]], [[EDIT]], [[EDITFIELD()]], [[FILETYPE()]], [[FLOCK()]], [[INDEXEXT()]], [[LOCK()]], [[LOCKF]], [[LOCKR]], [[RLOCK()]], [[SET CLIPPER]], [[SET CLIPPER5]], [[SET COMPATIBLE]], [[SET EDITFIELD]], [[SET EXCLUSIVE]], [[SET FILECASE]], [[SET FILETYPE]], [[SET FORMAT]], [[SET INDEXEXT]], [[SET LOCKWAIT]], [[SET MEMOEXT]], [[SET PCEDIT]], [[SET PCEXACT]], [[SET PCFILTER]], [[SET PCGRAPHICS]], [[SET PCKEYS]], [[SET PCPICTURE]], [[SET PCSAYS]], [[SET PCUNIQUE]], [[UNLOCK]], [[USE]] |
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==Description== | ==Description== | ||
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==Example== | ==Example== | ||
| − | < | + | <code lang="recital"> |
set pclocking on | set pclocking on | ||
do while not rlock() | do while not rlock() | ||
| − | set message to "Record in use." | + | set message to "Record in use." |
| − | sleep 2 | + | sleep 2 |
| − | enddo</ | + | enddo |
| + | </code> | ||
==Products== | ==Products== | ||
| − | Recital | + | Recital Server, Recital |
[[Category:Documentation]] | [[Category:Documentation]] | ||
[[Category:Commands]] | [[Category:Commands]] | ||
[[Category:Set_Commands|PCLOCKING]] | [[Category:Set_Commands|PCLOCKING]] | ||
Latest revision as of 16:59, 23 November 2009
Purpose
Determine whether multiple locks may be applied
Syntax
SET PCLOCKING ON | OFF | (<expL>)
See Also
ACCESS(), APPEND, CHANGE, DB_FOXPLUSBUGS, DB_FOXPROKEYS, DB_SAMBA, EDIT, EDITFIELD(), FILETYPE(), FLOCK(), INDEXEXT(), LOCK(), LOCKF, LOCKR, RLOCK(), SET CLIPPER, SET CLIPPER5, SET COMPATIBLE, SET EDITFIELD, SET EXCLUSIVE, SET FILECASE, SET FILETYPE, SET FORMAT, SET INDEXEXT, SET LOCKWAIT, SET MEMOEXT, SET PCEDIT, SET PCEXACT, SET PCFILTER, SET PCGRAPHICS, SET PCKEYS, SET PCPICTURE, SET PCSAYS, SET PCUNIQUE, UNLOCK, USE
Description
The SET PCLOCKING command determines whether multiple locks may be applied to records or the currently active table. If PCLOCKING is set ON, previous locks will be canceled as FLOCK() or RLOCK() functions attempt to lock records or files that are all ready locked. The previous lock will be removed regardless of the success or failure of the FLOCK() or RLOCK() function. When PCLOCKING is set OFF, multiple applications of the FLOCK() and RLOCK() functions are allowed. Please note that file and record locking is performed automatically. In most situations, the SET PCLOCKING command and the RLOCK() and FLOCK() functions are unnecessary, and are included for compatibility with programs written in other products.
This command allows the optional logical expression <expL> to be evaluated. If a value of .T. is returned, PCLOCKING is set ON. If a value of .F. is returned PCLOCKING is set OFF. Note that the <expL> should be enclosed in round brackets. By default, PCLOCKING is OFF.
Example
set pclocking on do while not rlock() set message to "Record in use." sleep 2 enddo
Products
Recital Server, Recital
