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< th colspan = "3" align = "center" > DB_MPOOLFILE-> set_flags()< / th >
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The DB_MPOOLFILE Handle
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< h2 class = "title" style = "clear: both" > < a id = "mempset_flags" > < / a > DB_MPOOLFILE-> set_flags()< / h2 >
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< pre class = "programlisting" > #include < db.h>
int
DB_MPOOLFILE-> set_flags(DB_MPOOLFILE *mpf, u_int32_t flags, int onoff) < / pre >
< p >
Configure a file in the cache.
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< p >
To set the flags for a particular database, call the
< code class = "methodname" > DB_MPOOLFILE-> set_flags()< / code > method using the
< a class = "link" href = "memp.html" title = "Chapter > DB_MPOOLFILE< / a > handle stored
in the < span class = "bold" > < strong > mpf< / strong > < / span > field of the
< a class = "link" href = "db.html" title = "Chapter > DB< / a > handle.
< / p >
< p >
The < code class = "methodname" > DB_MPOOLFILE-> set_flags()< / code > < span >
< span >
method returns a non-zero error value on failure and 0 on success.
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< h3 class = "title" > < a id = "id3739906" > < / a > Parameters< / h3 >
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< h4 class = "title" > < a id = "id3739895" > < / a > flags< / h4 >
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The < span class = "bold" > < strong > flags< / strong > < / span > parameter must be set by
bitwise inclusively < span class = "bold" > < strong > OR< / strong > < / span > 'ing together
one or more of the following values:
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< p > < a id = "mpool_set_flags_DB_MPOOL_NOFILE" > < / a >
< code class = "literal" > DB_MPOOL_NOFILE< / code >
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< p >
If set, no backing temporary file will be opened for the specified
in-memory database, even if it expands to fill the entire cache.
Attempts to create new database pages after the cache has been filled
will fail.
< / p >
< p >
The < code class = "literal" > DB_MPOOL_NOFILE< / code > flag configures a file in the cache, not
only operations performed using the specified
< a class = "link" href = "memp.html" title = "Chapter > DB_MPOOLFILE< / a > handle.
< / p >
< p >
The < code class = "literal" > DB_MPOOL_NOFILE< / code > flag may be used to configure Berkeley DB at any
time during the life of the application.
< / p >
< / li >
< li >
< p >
< code class = "literal" > DB_MPOOL_UNLINK< / code >
< / p >
< p >
If set, remove the file when the last reference to it is closed.
< / p >
< p >
The < code class = "literal" > DB_MPOOL_ULINK< / code > flag configures a file in the cache, not
only operations performed using the specified
< a class = "link" href = "memp.html" title = "Chapter > DB_MPOOLFILE< / a > handle.
< / p >
< p >
The < code class = "literal" > DB_MPOOL_ULINK< / code > flag may be used to configure Berkeley DB at any
time during the life of the application.
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< h4 class = "title" > < a id = "id3740061" > < / a > onoff< / h4 >
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If < span class = "bold" > < strong > onoff< / strong > < / span > is zero, the specified flags
are cleared; otherwise they are set.
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< a class = "link" href = "env.html" title = "Chapter > DB_ENV< / a > , < a class = "link" href = "memp.html" title = "Chapter > DB_MPOOLFILE< / a >
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< h3 class = "title" > < a id = "id3739913" > < / a > See Also< / h3 >
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< a class = "xref" href = "memp.html#memplist" title = "Memory Pools and Related Methods" > Memory Pools and Related Methods< / a >
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