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/* -*- c++ -*- */
/*
* Copyright 2005,2009 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio 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 3, or (at your option)
* any later version.
*
* GNU Radio 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 Radio; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gr_msg_queue.h>
#include <stdexcept>
gr_msg_queue_sptr
gr_make_msg_queue(unsigned int limit)
{
return gr_msg_queue_sptr (new gr_msg_queue(limit));
}
gr_msg_queue::gr_msg_queue(unsigned int limit)
: d_not_empty(), d_not_full(),
/*d_head(0), d_tail(0),*/ d_count(0), d_limit(limit)
{
}
gr_msg_queue::~gr_msg_queue()
{
flush ();
}
void
gr_msg_queue::insert_tail(gr_message_sptr msg)
{
if (msg->d_next)
throw std::invalid_argument("gr_msg_queue::insert_tail: msg already in queue");
gruel::scoped_lock guard(d_mutex);
while (full_p())
d_not_full.wait(guard);
if (d_tail == 0){
d_tail = d_head = msg;
//msg->d_next = 0;
msg->d_next.reset();
}
else {
d_tail->d_next = msg;
d_tail = msg;
//msg->d_next = 0;
msg->d_next.reset();
}
d_count++;
d_not_empty.notify_one();
}
gr_message_sptr
gr_msg_queue::delete_head()
{
gruel::scoped_lock guard(d_mutex);
gr_message_sptr m;
while ((m = d_head) == 0)
d_not_empty.wait(guard);
d_head = m->d_next;
if (d_head == 0){
//d_tail = 0;
d_tail.reset();
}
d_count--;
// m->d_next = 0;
m->d_next.reset();
d_not_full.notify_one();
return m;
}
gr_message_sptr
gr_msg_queue::delete_head_nowait()
{
gruel::scoped_lock guard(d_mutex);
gr_message_sptr m;
if ((m = d_head) == 0){
//return 0;
return gr_message_sptr();
}
d_head = m->d_next;
if (d_head == 0){
//d_tail = 0;
d_tail.reset();
}
d_count--;
//m->d_next = 0;
m->d_next.reset();
d_not_full.notify_one();
return m;
}
void
gr_msg_queue::flush()
{
gr_message_sptr m;
while ((m = delete_head_nowait ()) != 0)
;
}
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