Merged gcell, the Cell SPE scheduler and RPC mechanism into the trunk.

(eb/trunk-with-gcell r8037:8085).  Expect additional tweaks, but
currently works and passes distcheck.


git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@8086 221aa14e-8319-0410-a670-987f0aec2ac5

1 files changed, 74 insertions, 0 deletions

diff --git a/gcell/src/ibm/sync/ppu_source/cond_signal.h b/gcell/src/ibm/sync/ppu_source/cond_signal.h
new file mode 100644
index 000000000..dd4874827
--- /dev/null
+++ b/gcell/src/ibm/sync/ppu_source/cond_signal.h
@@ -0,0 +1,74 @@
+/* --------------------------------------------------------------  */
+/* (C)Copyright 2001,2007,                                         */
+/* International Business Machines Corporation,                    */
+/* Sony Computer Entertainment, Incorporated,                      */
+/* Toshiba Corporation,                                            */
+/*                                                                 */
+/* All Rights Reserved.                                            */
+/*                                                                 */
+/* Redistribution and use in source and binary forms, with or      */
+/* without modification, are permitted provided that the           */
+/* following conditions are met:                                   */
+/*                                                                 */
+/* - Redistributions of source code must retain the above copyright*/
+/*   notice, this list of conditions and the following disclaimer. */
+/*                                                                 */
+/* - Redistributions in binary form must reproduce the above       */
+/*   copyright notice, this list of conditions and the following   */
+/*   disclaimer in the documentation and/or other materials        */
+/*   provided with the distribution.                               */
+/*                                                                 */
+/* - Neither the name of IBM Corporation nor the names of its      */
+/*   contributors may be used to endorse or promote products       */
+/*   derived from this software without specific prior written     */
+/*   permission.                                                   */
+/*                                                                 */
+/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND          */
+/* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,     */
+/* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF        */
+/* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE        */
+/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR            */
+/* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,    */
+/* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT    */
+/* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;    */
+/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)        */
+/* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN       */
+/* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR    */
+/* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,  */
+/* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.              */
+/* --------------------------------------------------------------  */
+/* PROLOG END TAG zYx                                              */
+#ifndef _PPU_COND_SIGNAL_H_
+#define _PPU_COND_SIGNAL_H_
+
+#include <ppu_intrinsics.h>
+#include "sync_utils.h"
+#include "cond.h"
+
+/*
+ * _cond_signal: signaling any of the waiting threads to wake up.
+ */ 
+static __inline void _cond_signal (cond_ea_t cond)
+{
+  unsigned int val, waiting, signaled;
+  void *p;
+
+  SYNC_ULL_TO_PTR(cond, p);
+  
+  do {
+    val = __lwarx(p);
+
+    waiting = val & 0xFFFF;
+    signaled = val >> 16;
+    
+    /* If no other party is waiting. Don't send a signal.
+     * Otherwise, increment the signaled halfword.
+     */
+    if (waiting == signaled) break;
+    val = ((val+1) << 16) | waiting;
+
+  } while (__stwcx(p, val) == 0);
+}
+
+
+#endif /* _PPU_COND_SIGNAL_H_ */