Imported Upstream version 3.2.2

[debian/gnuradio] / gcell / include / gcell / gc_jd_queue_data.h

diff --git a/gcell/include/gcell/gc_jd_queue_data.h b/gcell/include/gcell/gc_jd_queue_data.h
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+++ b/gcell/include/gcell/gc_jd_queue_data.h
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+/* -*- 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_GCELL_GC_JD_QUEUE_DATA_H
+#define INCLUDED_GCELL_GC_JD_QUEUE_DATA_H
+
+#include <gcell/gc_types.h>
+#include <gcell/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_GCELL_GC_JD_QUEUE_DATA_H */
+
+