Merged eb/gcell-wip -r8559:8571 into trunk. The shared queue

structure is slightly modified, and the spu dequeue has been
streamlined.  In addition, the spu Lost-Lock Line Reservation event is
now work correctly, though it is still disabled because it's slower
than the expontial backoff alternative.



git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@8618 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 40 insertions, 0 deletions

diff --git a/gcell/src/lib/runtime/spu/gc_random.c b/gcell/src/lib/runtime/spu/gc_random.c
new file mode 100644
index 000000000..618cc7eba
--- /dev/null
+++ b/gcell/src/lib/runtime/spu/gc_random.c
@@ -0,0 +1,40 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 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.
+ */
+#include <gc_random.h>
+
+static int last_val = 0;
+
+#define	M  714025	// values from Numerical Recipes in C, 1988
+#define A    4096
+#define C  150889
+
+void 
+gc_set_seed(int seed)
+{
+  last_val = ((unsigned int) seed) % M;
+}
+
+float
+gc_uniform_deviate(void)
+{
+  last_val = (last_val * A + C) % M;
+  return (float) last_val / (float) M;
+}