add hazard pointer implementation. buggy

[nbds] / include / hazard.h

diff --git a/include/hazard.h b/include/hazard.h
new file mode 100644 (file)
index 0000000..938a3bd
--- /dev/null
+++ b/include/hazard.h
@@ -0,0 +1,25 @@
+/* 
+ * 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