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diff --git a/gcbv/mirror/include/gcx.h b/gcbv/mirror/include/gcx.h
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+++ b/gcbv/mirror/include/gcx.h
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+/*
+ * This file is provided under a dual BSD/GPLv2 license.  When using or
+ * redistributing this file, you may do so under either license.
+ *
+ * GPL LICENSE SUMMARY
+ *
+ * Copyright(c) 2012,
+ * Texas Instruments, Inc. and Vivante Corporation.
+ *
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program 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 St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * The full GNU General Public License is included in this distribution in
+ * the file called "COPYING".
+ *
+ * BSD LICENSE
+ *
+ * Copyright(c) 2012,
+ * Texas Instruments, Inc. and Vivante 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 Vivante 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.
+ */
+
+#ifndef GCX_H
+#define GCX_H
+
+#include <pthread.h>
+#include "gcerror.h"
+#include "gcreg.h"
+#include "gcdbglog.h"
+
+#ifndef countof
+#define countof(a) \
+	(sizeof(a) / sizeof(a[0]))
+#endif
+
+#define GCLOCK_TYPE \
+	pthread_mutex_t
+
+#define GCDEFINE_LOCK(name) \
+	pthread_mutex_t name = PTHREAD_MUTEX_INITIALIZER
+
+#define GCLOCK_INIT(lock) \
+	if (pthread_mutex_init(lock, NULL)) { \
+		GCERR("failed to init mutex.\n"); \
+	}
+
+#define GCLOCK_DESTROY(lock) \
+	if (pthread_mutex_destroy(lock)) { \
+		GCERR("failed to destroy mutex.\n"); \
+	}
+
+#define GCLOCK(lock) \
+	if (pthread_mutex_lock(lock)) { \
+		GCERR("failed to lock mutex.\n"); \
+	}
+
+#define GCUNLOCK(lock) \
+	if (pthread_mutex_unlock(lock)) { \
+		GCERR("failed to unlock mutex.\n"); \
+	}
+
+#endif