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<! "@(#)sync.so 10.8 (Sleepycat) 9/29/98">
<!Copyright 1997, 1998 by Sleepycat Software, Inc. All rights reserved.>
<html>
<body bgcolor=white>
<head>
<title>Berkeley DB: DbMpoolFile::sync</title>
<meta name="description" content="Berkeley DB: An embedded database programmatic toolkit.">
<meta name="keywords" content="embedded,database,programmatic,toolkit,b+tree,btr
ee,hash,hashing,transaction,transactions,locking,logging,access method,access me
thods,java,C,C++">
</head>
<h1>DbMpoolFile::sync</h1>
<hr size=1 noshade>
<tt>
<h3>
<pre>
#include <db_cxx.h>
<p>
int
DbMpoolFile::sync();
</pre>
</h3>
<h1>Description</h1>
<p>
The DbMpoolFile::sync method writes all pages associated with the
<a href="../../api_cxx/DbMpoolFile/class.html">DbMpoolFile</a> object, that were marked as modified using
<a href="../../api_cxx/DbMpoolFile/put.html">DbMpoolFile::put</a> or <a href="../../api_cxx/DbMpoolFile/set.html">DbMpoolFile::set</a>, back to the source file.
If any of the modified pages are also <i>pinned</i> (i.e., currently
referenced by this or another process) DbMpoolFile::sync will ignore them.
<p>
The DbMpoolFile::sync
method either returns <b>errno</b> or throws an exception that
encapsulates an <b>errno</b> on failure, and 0 on success,
and DB_INCOMPLETE if there were pages which were modified but which
DbMpoolFile::sync was unable to write.
<p>
<h1>Errors</h1>
If a fatal error occurs in Berkeley DB, the DbMpoolFile::sync method may fail and either
return DB_RUNRECOVERY or throw an exception encapsulating DB_RUNRECOVERY,
at which point all subsequent database calls will also fail in the same
way. Methods marked as returning <b>errno</b> will, by default, throw
an exception that encapsulates the error information. The default error
behavior can be changed, see <a href="../../api_cxx/DbException/class.html">DbException</a>.
<p>
The DbMpoolFile::sync
method may fail and throw an exception
for any of the errors specified for the following Berkeley DB and C library
functions:
DBmemp->pgin(3),
DBmemp->pgout(3),
abort(3),
close(3),
dbenv->db_paniccall(3),
fcntl(3),
fflush(3),
fprintf(3),
free(3),
fsync(3),
getenv(3),
getpid(3),
getuid(3),
isdigit(3),
<a href="../../api_cxx/DbLog/compare.html">DbLog::compare</a>,
<a href="../../api_cxx/DbLog/flush.html">DbLog::flush</a>,
lseek(3),
malloc(3),
memcpy(3),
memset(3),
open(3),
pread(3),
pwrite(3),
qsort(3),
read(3),
realloc(3),
sigfillset(3),
sigprocmask(3),
stat(3),
strerror(3),
strlen(3),
unlink(3),
vfprintf(3),
vsnprintf(3),
and
write(3).
<p>
<h1>Class</h1>
<a href="../../api_cxx/DbMpoolFile/class.html">DbMpoolFile</a>
<p>
<h1>See Also</h1>
<a href="../../api_cxx/DbMpoolFile/close.html">DbMpoolFile::close</a>,
<a href="../../api_cxx/DbMpoolFile/get.html">DbMpoolFile::get</a>,
<a href="../../api_cxx/DbMpoolFile/open.html">DbMpoolFile::open</a>,
<a href="../../api_cxx/DbMpoolFile/put.html">DbMpoolFile::put</a>,
<a href="../../api_cxx/DbMpoolFile/set.html">DbMpoolFile::set</a>
and
DbMpoolFile::sync.
</tt>
</body>
</html>
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