+/*
+ * Written by Josh Dybnis and released to the public domain, as explained at
+ * http://creativecommons.org/licenses/publicdomain
+ *
+ * hazard pointers
+ *
+ * www.research.ibm.com/people/m/michael/ieeetpds-2004.pdf
+ *
+ */
+#ifndef HAZARD_H
+#define HAZARD_H
+
+#define STATIC_HAZ_PER_THREAD 2
+
+typedef void (*free_t) (void *);
+typedef void *haz_t;
+
+static inline void haz_set (haz_t *haz, void *x) { *haz = x; __asm__ __volatile__("mfence"); }
+
+haz_t *haz_get_static (int n);
+void haz_register_dynamic (haz_t *haz);
+void haz_unregister_dynamic (haz_t *haz);
+void haz_defer_free (void *p, free_t f);
+
+#endif