DbMpoolFile::get
DbMpoolFile::get |
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#include <db_cxx.h>int DbMpoolFile::get(db_pgno_t *pgnoaddr, u_int32_t flags, void **pagep);
The DbMpoolFile::get method copies a pointer to the page with the page number specified by pgnoaddr, from the source file in the DbMpoolFile, into the memory location to which pagep refers. If the page does not exist or cannot be retrieved, DbMpoolFile::get will fail.
Page numbers begin at 0; that is, the first page in the file is page number 0, not page number 1.
The returned page is size_t type aligned.
The flags value must be set to 0 or by bitwise inclusively OR'ing together one or more of the following values:
The DB_MPOOL_CREATE, DB_MPOOL_LAST, and DB_MPOOL_NEW flags are mutually exclusive.
Fully or partially created pages have all their bytes set to 0, unless other behavior was specified when the file was opened.
All pages returned by DbMpoolFile::get will be retained (that is, pinned), in the pool until a subsequent call to DbMpoolFile::put.
The DbMpoolFile::get method either returns a non-zero error value or throws an exception that encapsulates a non-zero error value on failure, 0 on success, and returns DB_PAGE_NOTFOUND if the requested page does not exist and DB_MPOOL_CREATE was not set.
The DbMpoolFile::get method may fail and throw an exception or return a non-zero error for the following conditions:
The DB_MPOOL_NEW flag was set, and the source file was not opened for writing.
More than one of DB_MPOOL_CREATE, DB_MPOOL_LAST, and DB_MPOOL_NEW was set.
The DbMpoolFile::get method may fail and throw an exception or return a non-zero error for errors specified for other Berkeley DB and C library or system methods. If a catastrophic error has occurred, the DbMpoolFile::get method may fail and either return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail in the same way.
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Copyright Sleepycat Software
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1.1.1.1
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@Import: RPM 4.0.4
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Fully or partially created pages have all their bytes set to a nul byte,
unless the DbMpoolFile::set_clear_len method was called to specify other
behavior before the file was opened.
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DbEnv::memp_fcreate,
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DbMpoolFile::set_clear_len,
DbMpoolFile::set_fileid,
DbMpoolFile::set_ftype,
DbMpoolFile::set_lsn_offset,
DbMpoolFile::set_pgcookie,
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@Import: RPM 4.0.5
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If a catastrophic error has occurred, the DbMpoolFile::get method may fail and
either return DB_RUNRECOVERY or throw a
DbRunRecoveryException,
in which case all subsequent Berkeley DB calls will fail in the same way.
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DbEnv, DbMpoolFile
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a102 1
Memory Pools and Related Methods
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1.1.1.4
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@Import: RPM 4.1
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If a catastrophic error has occurred, the DbMpoolFile::get method may fail and either
return DB_RUNRECOVERY or throw an exception encapsulating
DB_RUNRECOVERY, in which case all subsequent Berkeley DB calls will fail
in the same way.
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DbEnv, DbMpoolFile
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DbEnv::set_cachesize,
DbEnv::set_mp_mmapsize,
DbEnv::memp_fcreate,
DbMpoolFile::close,
DbMpoolFile::get,
DbMpoolFile::open,
DbMpoolFile::put,
DbMpoolFile::set,
DbMpoolFile::sync,
DbEnv::memp_register,
DbMpoolFile::set_clear_len,
DbMpoolFile::set_fileid,
DbMpoolFile::set_ftype,
DbMpoolFile::set_lsn_offset,
DbMpoolFile::set_pgcookie,
DbEnv::memp_stat,
DbEnv::memp_sync,
and
DbEnv::memp_trickle.
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1.1.1.5
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@Import: RPM 4.1.1
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text
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a3 1
d77 4
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If a catastrophic error has occurred, the DbMpoolFile::get method may fail and
either return DB_RUNRECOVERY or throw a
DbRunRecoveryException,
in which case all subsequent Berkeley DB calls will fail in the same way.
d82 1
a82 1
DbEnv, DbMpoolFile
d84 19
a102 1
Memory Pools and Related Methods
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