org.apache.cassandra.utils

Class CLibrary

java.lang.Object

org.apache.cassandra.utils.CLibrary

public final class CLibrary
extends java.lang.Object

Method Summary

Modifier and Type	Method and Description
static int	getfd(java.nio.channels.FileChannel channel)
static int	getfd(java.io.FileDescriptor descriptor) Get system file descriptor from FileDescriptor object.
static boolean	jnaAvailable()
static boolean	jnaMemoryLockable()
static void	tryCloseFD(int fd)
static int	tryFcntl(int fd, int command, int flags)
static void	tryMlockall()
static int	tryOpenDirectory(java.lang.String path)
static void	trySkipCache(int fd, long offset, int len, java.lang.String path)
static void	trySkipCache(int fd, long offset, long len, java.lang.String path)
static void	trySkipCache(java.lang.String path, long offset, long len)
static void	trySync(int fd)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

jnaAvailable

public static boolean jnaAvailable()

jnaMemoryLockable

public static boolean jnaMemoryLockable()

tryMlockall

public static void tryMlockall()

trySkipCache

public static void trySkipCache(java.lang.String path,
                                long offset,
                                long len)

trySkipCache

public static void trySkipCache(int fd,
                                long offset,
                                long len,
                                java.lang.String path)

trySkipCache

public static void trySkipCache(int fd,
                                long offset,
                                int len,
                                java.lang.String path)

tryFcntl

public static int tryFcntl(int fd,
                           int command,
                           int flags)

tryOpenDirectory

public static int tryOpenDirectory(java.lang.String path)

trySync

public static void trySync(int fd)

tryCloseFD

public static void tryCloseFD(int fd)

getfd

public static int getfd(java.nio.channels.FileChannel channel)

getfd

public static int getfd(java.io.FileDescriptor descriptor)

Get system file descriptor from FileDescriptor object.

Parameters:

descriptor - - FileDescriptor objec to get fd from

Returns:

file descriptor, -1 or error