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/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
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* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
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* Copyright (C) 2008 JRuby project
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* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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package org.jruby.ext.ffi.io;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyIO;
import org.jruby.RubyModule;
import org.jruby.RubyNumeric;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.io.BadDescriptorException;
import org.jruby.util.io.ChannelDescriptor;
import org.jruby.util.io.ChannelStream;
import org.jruby.util.io.InvalidValueException;
import org.jruby.util.io.ModeFlags;
/**
* An IO implementation that reads/writes to a native file descriptor.
*/
@JRubyClass(name="FFI::" + FileDescriptorIO.CLASS_NAME, parent="IO")
public class FileDescriptorIO extends RubyIO {
public static final String CLASS_NAME = "FileDescriptorIO";
private static final class Allocator implements ObjectAllocator {
public final IRubyObject allocate(Ruby runtime, RubyClass klass) {
return new FileDescriptorIO(runtime, klass);
}
private static final ObjectAllocator INSTANCE = new Allocator();
}
public FileDescriptorIO(Ruby runtime, RubyClass klass) {
super(runtime, klass);
}
public FileDescriptorIO(Ruby runtime, IRubyObject fd) {
super(runtime, runtime.fastGetModule("FFI").fastGetClass(CLASS_NAME));
ModeFlags modes;
try {
modes = new ModeFlags(ModeFlags.RDWR);
openFile.setMainStream(ChannelStream.open(getRuntime(),
new ChannelDescriptor(new FileDescriptorByteChannel(getRuntime(), RubyNumeric.fix2int(fd)),
modes)));
openFile.setPipeStream(openFile.getMainStreamSafe());
openFile.setMode(modes.getOpenFileFlags());
openFile.getMainStreamSafe().setSync(true);
} catch (BadDescriptorException e) {
throw runtime.newErrnoEBADFError();
} catch (InvalidValueException ex) {
throw new RuntimeException(ex);
}
}
public static RubyClass createFileDescriptorIOClass(Ruby runtime, RubyModule module) {
RubyClass result = runtime.defineClassUnder(CLASS_NAME, runtime.fastGetClass("IO"),
Allocator.INSTANCE, module);
result.defineAnnotatedMethods(FileDescriptorIO.class);
result.defineAnnotatedConstants(FileDescriptorIO.class);
return result;
}
@JRubyMethod(name = "new", meta = true)
public static FileDescriptorIO newInstance(ThreadContext context, IRubyObject recv, IRubyObject fd) {
return new FileDescriptorIO(context.getRuntime(), fd);
}
@JRubyMethod(name = "wrap", required = 1, meta = true)
public static RubyIO wrap(ThreadContext context, IRubyObject recv, IRubyObject fd) {
return new FileDescriptorIO(context.getRuntime(), fd);
}
}
