refact

source/libs/tkv/CMakeLists.txt

 aux_source_directory(src TKV_SRC)
 add_library(tkv STATIC ${TKV_SRC})
+# target_include_directories(
+#     tkv
+#     PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/tkv"
+#     PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+# )
 target_include_directories(
     tkv
-    PUBLIC "${CMAKE_SOURCE_DIR}/include/libs/tkv"
-    PRIVATE "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+    PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/inc"
+    PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}/src/inc"
 )
 target_link_libraries(
     tkv

source/libs/tkv/inc/tkv.h

@@ -16,14 +16,21 @@
 #ifndef _TD_TKV_H_
 #define _TD_TKV_H_
 
+#include "os.h"
+
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+// Forward declaration
+typedef struct TDB     TDB;
+typedef struct TDB_ENV TDB_ENV;
+
 // SKey
-typedef struct SKey {
-  void *bdata;
-} SKey, SValue;
+typedef struct {
+  void *   bdata;
+  uint32_t size;
+} TDB_KEY, TDB_VALUE;
 
 #ifdef __cplusplus
 }