+
+#include <sys/types.h>
+#include <ust/config.h>
+#include <urcu/arch.h>
+
+#define likely(x) __builtin_expect(!!(x), 1)
+#define unlikely(x) __builtin_expect(!!(x), 0)
+
+/* ARRAYS */
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+
+/* ALIGNMENT SHORTCUTS */
+
+#include <unistd.h>
+
+#define ALIGN(x,a) __ALIGN_MASK(x,(typeof(x))(a)-1)
+#define __ALIGN_MASK(x,mask) (((x)+(mask))&~(mask))
+#define PAGE_ALIGN(addr) ALIGN(addr, PAGE_SIZE)
+#define PAGE_SIZE sysconf(_SC_PAGE_SIZE)
+#define PAGE_MASK (~(PAGE_SIZE-1))
+
+/* ERROR OPS */
+#define MAX_ERRNO 4095
+
+#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
+
+static inline void *ERR_PTR(long error)
+{
+ return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+ return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+ return IS_ERR_VALUE((unsigned long)ptr);
+}
+
+
+/* Min / Max */
+
+#define min_t(type, x, y) ({ \
+ type __min1 = (x); \
+ type __min2 = (y); \
+ __min1 < __min2 ? __min1: __min2; })
+
+#define max_t(type, x, y) ({ \
+ type __max1 = (x); \
+ type __max2 = (y); \
+ __max1 > __max2 ? __max1: __max2; })
+
+
+/* MUTEXES */
+
+#include <pthread.h>
+
+#define DEFINE_MUTEX(m) pthread_mutex_t (m) = PTHREAD_MUTEX_INITIALIZER;
+#define DECLARE_MUTEX(m) extern pthread_mutex_t (m);
+
+/* MALLOCATION */
+
+#include <stdlib.h>
+
+static inline
+void *zmalloc(size_t len)
+{
+ return calloc(1, len);
+}
+
+static inline
+void *malloc_align(size_t len)