mirror of git://gcc.gnu.org/git/gcc.git
83 lines
2.8 KiB
Java
83 lines
2.8 KiB
Java
/* VMPipe.java -- Reference implementation for VM hooks used by PipeImpl
|
|
Copyright (C) 2004, 2010 Free Software Foundation, Inc.
|
|
|
|
This file is part of GNU Classpath.
|
|
|
|
GNU Classpath is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 2, or (at your option)
|
|
any later version.
|
|
|
|
GNU Classpath is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with GNU Classpath; see the file COPYING. If not, write to the
|
|
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|
02110-1301 USA.
|
|
|
|
Linking this library statically or dynamically with other modules is
|
|
making a combined work based on this library. Thus, the terms and
|
|
conditions of the GNU General Public License cover the whole
|
|
combination.
|
|
|
|
As a special exception, the copyright holders of this library give you
|
|
permission to link this library with independent modules to produce an
|
|
executable, regardless of the license terms of these independent
|
|
modules, and to copy and distribute the resulting executable under
|
|
terms of your choice, provided that you also meet, for each linked
|
|
independent module, the terms and conditions of the license of that
|
|
module. An independent module is a module which is not derived from
|
|
or based on this library. If you modify this library, you may extend
|
|
this exception to your version of the library, but you are not
|
|
obligated to do so. If you do not wish to do so, delete this
|
|
exception statement from your version. */
|
|
|
|
package gnu.java.nio;
|
|
|
|
import java.io.IOException;
|
|
import gnu.classpath.Configuration;
|
|
|
|
/**
|
|
* This class contains the native methods for gnu.java.nio.PipeImpl
|
|
* As such, it needs help from the VM.
|
|
*
|
|
* @author Patrik Reali
|
|
*/
|
|
final class VMPipe
|
|
{
|
|
|
|
static
|
|
{
|
|
// load the shared library needed for native methods.
|
|
if (Configuration.INIT_LOAD_LIBRARY)
|
|
{
|
|
System.loadLibrary ("javanio");
|
|
}
|
|
}
|
|
|
|
private VMPipe() {} // Prohibits instantiation.
|
|
|
|
/**
|
|
* Create a pipe, consisting of a readable VMChannel and a writable
|
|
* VMChannel. The readable channel is returned is the first element
|
|
* of the array, and the writable in the second.
|
|
*
|
|
* @return A pair of VMChannels; the first readable, the second
|
|
* writable.
|
|
* @throws IOException If the pipe cannot be created.
|
|
*/
|
|
static VMChannel[] pipe() throws IOException
|
|
{
|
|
VMChannel[] pipe = new VMChannel[2];
|
|
int[] fds = pipe0();
|
|
pipe[0] = new VMChannel(fds[0]);
|
|
pipe[1] = new VMChannel(fds[1]);
|
|
return pipe;
|
|
}
|
|
|
|
private static native int[] pipe0() throws IOException;
|
|
}
|