in txn, use a "naked" value without an update record whenever possible

[nbds] / include / common.h

diff --git a/include/common.h b/include/common.h
index 205ea3402a3a937d03d1977c5828ca7616ae1c4e..faebe4c807160d7f093bb34a85acd0e584dcc305 100644 (file)
--- a/include/common.h
+++ b/include/common.h
@@ -31,10 +31,16 @@
 #define TRUE  1
 #define FALSE 0
 
-#define TAG          (1ULL << 63)
-#define TAG_VALUE(v) ((uint64_t)(v) |  TAG)
-#define IS_TAGGED(v) ((uint64_t)(v) &  TAG)
-#define STRIP_TAG(v) ((uint64_t)(v) & ~TAG)
+#define TAG1         (1ULL << 63)
+#define TAG2         (1ULL << 62)
+#define TAG_VALUE(v, tag) ((uint64_t)(v) |  tag)
+#define IS_TAGGED(v, tag) ((uint64_t)(v) &  tag)
+#define STRIP_TAG(v, tag) ((uint64_t)(v) & ~tag)
+
+#define DOES_NOT_EXIST 0
+#define ERROR_INVALID_OPTION (-1)
+#define ERROR_INVALID_ARGUMENT (-2)
+#define ERROR_UNSUPPORTED_FEATURE (-3)
 
 typedef unsigned long long uint64_t;
 typedef unsigned int       uint32_t;