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diff --git a/exec/quorum.h b/exec/quorum.h
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+/*
+ * Copyright (c) 2008-2012 Red Hat, Inc.
+ *
+ * All rights reserved.
+ *
+ * Author: Christine Caulfield (ccaulfie@redhat.com)
+ *
+ * This software licensed under BSD license, the text of which follows:
+ *
+ * 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 the Red Hat, Inc. 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 QUORUM_H_DEFINED
+#define QUORUM_H_DEFINED
+
+struct memb_ring_id;
+
+typedef void (*quorum_callback_fn_t) (int quorate, void *context);
+
+typedef void (*quorum_set_quorate_fn_t) (const unsigned int *view_list,
+                                         size_t view_list_entries,
+                                         int quorate, struct memb_ring_id *);
+
+struct quorum_callin_functions
+{
+	int (*quorate) (void);
+	int (*register_callback) (quorum_callback_fn_t, void*);
+	int (*unregister_callback) (quorum_callback_fn_t, void*);
+};
+
+extern int corosync_quorum_is_quorate (void);
+
+extern int corosync_quorum_register_callback (quorum_callback_fn_t fn, void *context);
+
+extern int corosync_quorum_unregister_callback (quorum_callback_fn_t fn, void *context);
+
+extern int corosync_quorum_initialize (struct quorum_callin_functions *fns);
+
+
+extern int quorum_none(void);
+
+
+#endif /* QUORUM_H_DEFINED */