The DbMpool::close method closes the memory pool.
Calling DbMpool::close does not imply a call to DbMpoolFile::sync, but does imply a call to DbMpoolFile::close for any remaining open files in the pool returned to this process by calls to DbMpoolFile::open.
In addition, if the dir argument to DbMpool::open was NULL and dbenv was not initialized using DbEnv::appinit, or the DB_MPOOL_PRIVATE flag was set, all files created for this shared region will be removed, as if the DbMpool::unlink method were called.
In multi-threaded applications, only a single thread may call the DbMpool::close method.
The DbMpool::close method either returns errno or throws an exception that encapsulates an errno on failure, and 0 on success.
The DbMpool::close method may fail and throw an exception for any of the errors specified for the following Berkeley DB and C library functions: abort(3), close(3), fcntl(3), fflush(3), fprintf(3), free(3), getpid(3), DbMpoolFile::close, memset(3), munmap(3), shmctl(3), shmdt(3), strlen(3), unlink(3), vfprintf(3), and vsnprintf(3).