/* -*- c++ -*- */

/*

 * Copyright 2007,2008 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 this program; if not, write to the Free Software Foundation, Inc.,

 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

#ifndef INCLUDED_GC_JD_QUEUE_DATA_H

#define INCLUDED_GC_JD_QUEUE_DATA_H

#include "gc_types.h"

#include "gc_job_desc.h"

__GC_BEGIN_DECLS

/*!

 * \brief (Lock free someday...) queue for job descriptors

 *

 * This is the main data structure shared between PPEs and SPEs.

 * It is used to enqueue work for SPEs.  SPEs or PPEs may enqueue

 * work.  SPE's dequeue from here.

 *

 * FIXME make it lock free ;)  For now, use a spin lock.

 *

 * (Fills a single cache line)

 */

typedef struct gc_jd_queue

{

  gc_eaddr_t        head  _AL16;

  gc_eaddr_t        tail  _AL16;

  uint32_t        mutex _AL16;                // libsync mutex (spin lock)

} _AL128 gc_jd_queue_t;

__GC_END_DECLS

#endif /* INCLUDED_GC_JD_QUEUE_DATA_H */