/***** BEGIN LICENSE BLOCK *****
* Version: EPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Eclipse 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/epl-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.
*
* Copyright (C) 2006 Nick Sieger <nicksieger@gmail.com>
*
* 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"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
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* use your version of this file under the terms of the EPL, indicate your
* decision by deleting the provisions above and replace them with the notice
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* the provisions above, a recipient may use your version of this file under
* the terms of any one of the EPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****/
package org.jruby.ext.io.wait;
import org.jruby.Ruby;
import org.jruby.RubyClass;
import org.jruby.RubyIO;
import org.jruby.RubyNumeric;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.load.Library;
import org.jruby.util.io.OpenFile;
/**
* @author Nick Sieger
*/
public class IOWaitLibrary implements Library {
public void load(Ruby runtime, boolean wrap) {
RubyClass ioClass = runtime.getIO();
ioClass.defineAnnotatedMethods(IOWaitLibrary.class);
}
@JRubyMethod
public static IRubyObject nread(ThreadContext context, IRubyObject _io) {
Ruby runtime = context.runtime;
OpenFile fptr;
int len;
// ioctl_arg n;
RubyIO io = (RubyIO)_io;
fptr = io.getOpenFileChecked();
fptr.checkReadable(context);
len = fptr.readPending();
if (len > 0) return runtime.newFixnum(len);
// TODO: better effort to get available bytes from our channel
// if (!FIONREAD_POSSIBLE_P(fptr->fd)) return INT2FIX(0);
// if (ioctl(fptr->fd, FIONREAD, &n)) return INT2FIX(0);
// if (n > 0) return ioctl_arg2num(n);
return RubyNumeric.int2fix(runtime, 0);
}
/**
* returns non-nil if input available without blocking, false if EOF or not open/readable, otherwise nil.
*/
@JRubyMethod(name = "ready?")
public static IRubyObject ready(ThreadContext context, IRubyObject _io) {
Ruby runtime = context.runtime;
RubyIO io = (RubyIO)_io;
OpenFile fptr;
// ioctl_arg n;
fptr = io.getOpenFileChecked();
fptr.checkReadable(context);
if (fptr.readPending() != 0) return runtime.getTrue();
// TODO: better effort to get available bytes from our channel
// if (!FIONREAD_POSSIBLE_P(fptr->fd)) return Qnil;
// if (ioctl(fptr->fd, FIONREAD, &n)) return Qnil;
// if (n > 0) return Qtrue;
return runtime.getFalse();
}
@JRubyMethod(optional = 1)
public static IRubyObject wait_readable(ThreadContext context, IRubyObject _io, IRubyObject[] argv) {
RubyIO io = (RubyIO)_io;
Ruby runtime = context.runtime;
OpenFile fptr;
boolean i;
// ioctl_arg n;
IRubyObject timeout;
long tv;
// struct timeval timerec;
// struct timeval *tv;
fptr = io.getOpenFileChecked();
fptr.checkReadable(context);
switch (argv.length) {
case 1:
timeout = argv[0];
break;
default:
timeout = context.nil;
}
if (timeout.isNil()) {
tv = 0;
}
else {
tv = timeout.convertToInteger().getLongValue() * 1000;
}
if (fptr.readPending() != 0) return runtime.getTrue();
// TODO: better effort to get available bytes from our channel
// if (!FIONREAD_POSSIBLE_P(fptr->fd)) return Qfalse;
// TODO: actually use timeout
i = fptr.waitReadable(context, tv);
fptr.checkClosed();
// if (ioctl(fptr->fd, FIONREAD, &n)) rb_sys_fail(0);
// if (n > 0) return io;
if (i) return io;
return context.nil;
}
/**
* waits until input available or timed out and returns self, or nil when EOF reached.
*/
@JRubyMethod(optional = 1)
public static IRubyObject wait_writable(ThreadContext context, IRubyObject _io, IRubyObject[] argv) {
RubyIO io = (RubyIO)_io;
OpenFile fptr;
boolean i;
IRubyObject timeout;
long tv;
fptr = io.getOpenFileChecked();
fptr.checkWritable(context);
switch (argv.length) {
case 1:
timeout = argv[0];
break;
default:
timeout = context.nil;
}
if (timeout.isNil()) {
tv = 0;
}
else {
tv = timeout.convertToInteger().getLongValue() * 1000;
}
i = fptr.waitWritable(context, tv);
fptr.checkClosed();
if (i)
return io;
return context.nil;
}
}