Merge branch 'feature/tdb' of https://github.com/taosdata/TDengine into feature/meta

include/common/tmsgdef.h

@@ -192,7 +192,6 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_VND_SUBSCRIBE, "vnode-subscribe", SMVSubscribeReq, SMVSubscribeRsp)
   TD_DEF_MSG_TYPE(TDMT_VND_CONSUME, "vnode-consume", SMqCVConsumeReq, SMqCVConsumeRsp)
   TD_DEF_MSG_TYPE(TDMT_VND_TASK_DEPLOY, "vnode-task-deploy", SStreamTaskDeployReq, SStreamTaskDeployRsp)
-  TD_DEF_MSG_TYPE(TDMT_VND_TASK_EXEC, "vnode-task-exec", SStreamTaskExecReq, SStreamTaskExecRsp)
   TD_DEF_MSG_TYPE(TDMT_VND_TASK_PIPE_EXEC, "vnode-task-pipe-exec", SStreamTaskExecReq, SStreamTaskExecRsp)
   TD_DEF_MSG_TYPE(TDMT_VND_TASK_MERGE_EXEC, "vnode-task-merge-exec", SStreamTaskExecReq, SStreamTaskExecRsp)
   TD_DEF_MSG_TYPE(TDMT_VND_TASK_WRITE_EXEC, "vnode-task-write-exec", SStreamTaskExecReq, SStreamTaskExecRsp)

include/libs/stream/tstream.h

@@ -82,8 +82,12 @@ typedef struct {
   SHashObj* pHash;  // groupId to tbuid
 } STaskSinkTb;
 
+typedef void FSmaHandle(void* vnode, int64_t smaId, const SArray* data);
+
 typedef struct {
-  int8_t reserved;
+  int64_t smaId;
+  // following are not applicable to encoder and decoder
+  FSmaHandle* smaHandle;
 } STaskSinkSma;
 
 typedef struct {
@@ -156,7 +160,8 @@ typedef struct {
     STaskDispatcherShuffle shuffleDispatcher;
   };
 
-  // state storage
+  // application storage
+  void* ahandle;
 
 } SStreamTask;
 

source/client/src/tmq.c

@@ -877,7 +877,7 @@ WRITE_QUEUE_FAIL:
 }
 
 bool tmqUpdateEp(tmq_t* tmq, int32_t epoch, SMqCMGetSubEpRsp* pRsp) {
-  printf("call update ep %d\n", epoch);
+  /*printf("call update ep %d\n", epoch);*/
   bool    set = false;
   int32_t sz = taosArrayGetSize(pRsp->topics);
   SArray* newTopics = taosArrayInit(sz, sizeof(SMqClientTopic));

source/dnode/mgmt/vnode/src/vmMsg.c

@@ -279,7 +279,6 @@ void vmInitMsgHandles(SMgmtWrapper *pWrapper) {
   dndSetMsgHandle(pWrapper, TDMT_VND_CONSUME, (NodeMsgFp)vmProcessFetchMsg, VND_VGID);
   dndSetMsgHandle(pWrapper, TDMT_VND_TASK_DEPLOY, (NodeMsgFp)vmProcessWriteMsg, VND_VGID);
   dndSetMsgHandle(pWrapper, TDMT_VND_QUERY_HEARTBEAT, (NodeMsgFp)vmProcessFetchMsg, VND_VGID);
-  dndSetMsgHandle(pWrapper, TDMT_VND_TASK_EXEC, (NodeMsgFp)vmProcessFetchMsg, VND_VGID);
   dndSetMsgHandle(pWrapper, TDMT_VND_TASK_PIPE_EXEC, (NodeMsgFp)vmProcessFetchMsg, VND_VGID);
   dndSetMsgHandle(pWrapper, TDMT_VND_TASK_MERGE_EXEC, (NodeMsgFp)vmProcessMergeMsg, VND_VGID);
   dndSetMsgHandle(pWrapper, TDMT_VND_STREAM_TRIGGER, (NodeMsgFp)vmProcessFetchMsg, VND_VGID);

source/dnode/mnode/impl/inc/mndScheduler.h

@@ -27,7 +27,7 @@ void    mndCleanupScheduler(SMnode* pMnode);
 
 int32_t mndSchedInitSubEp(SMnode* pMnode, const SMqTopicObj* pTopic, SMqSubscribeObj* pSub);
 
-int32_t mndScheduleStream(SMnode* pMnode, STrans* pTrans, SStreamObj* pStream);
+int32_t mndScheduleStream(SMnode* pMnode, STrans* pTrans, SStreamObj* pStream, int64_t smaId);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/inc/mndStream.h

@@ -31,7 +31,7 @@ void        mndReleaseStream(SMnode *pMnode, SStreamObj *pStream);
 SSdbRaw *mndStreamActionEncode(SStreamObj *pStream);
 SSdbRow *mndStreamActionDecode(SSdbRaw *pRaw);
 
-int32_t mndAddStreamToTrans(SMnode *pMnode, SStreamObj *pStream, const char *ast, STrans *pTrans);
+int32_t mndAddStreamToTrans(SMnode *pMnode, SStreamObj *pStream, const char *ast, STrans *pTrans, int64_t smaId);
 
 #ifdef __cplusplus
 }

source/dnode/mnode/impl/src/mndDef.c

@@ -36,11 +36,11 @@ int32_t tEncodeSStreamObj(SCoder *pEncoder, const SStreamObj *pObj) {
   if (tEncodeI32(pEncoder, sz) < 0) return -1;
 
   for (int32_t i = 0; i < sz; i++) {
-    SArray *pArray = taosArrayGet(pObj->tasks, i);
+    SArray *pArray = taosArrayGetP(pObj->tasks, i);
     int32_t innerSz = taosArrayGetSize(pArray);
     if (tEncodeI32(pEncoder, innerSz) < 0) return -1;
     for (int32_t j = 0; j < innerSz; j++) {
-      SStreamTask *pTask = taosArrayGet(pArray, j);
+      SStreamTask *pTask = taosArrayGetP(pArray, j);
       if (tEncodeSStreamTask(pEncoder, pTask) < 0) return -1;
     }
   }
@@ -76,17 +76,18 @@ int32_t tDecodeSStreamObj(SCoder *pDecoder, SStreamObj *pObj) {
   int32_t sz;
   if (tDecodeI32(pDecoder, &sz) < 0) return -1;
   if (sz != 0) {
-    pObj->tasks = taosArrayInit(sz, sizeof(SArray));
+    pObj->tasks = taosArrayInit(sz, sizeof(void *));
     for (int32_t i = 0; i < sz; i++) {
       int32_t innerSz;
       if (tDecodeI32(pDecoder, &innerSz) < 0) return -1;
-      SArray *pArray = taosArrayInit(innerSz, sizeof(SStreamTask));
+      SArray *pArray = taosArrayInit(innerSz, sizeof(void *));
       for (int32_t j = 0; j < innerSz; j++) {
-        SStreamTask task;
-        if (tDecodeSStreamTask(pDecoder, &task) < 0) return -1;
-        taosArrayPush(pArray, &task);
+        SStreamTask *pTask = taosMemoryCalloc(1, sizeof(SStreamTask));
+        if (pTask == NULL) return -1;
+        if (tDecodeSStreamTask(pDecoder, pTask) < 0) return -1;
+        taosArrayPush(pArray, &pTask);
       }
-      taosArrayPush(pObj->tasks, pArray);
+      taosArrayPush(pObj->tasks, &pArray);
     }
   }
 

source/dnode/mnode/impl/src/mndScheduler.c

@@ -119,7 +119,7 @@ SVgObj* mndSchedFetchOneVg(SMnode* pMnode, int64_t dbUid) {
   return pVgroup;
 }
 
-int32_t mndScheduleStream(SMnode* pMnode, STrans* pTrans, SStreamObj* pStream) {
+int32_t mndScheduleStream(SMnode* pMnode, STrans* pTrans, SStreamObj* pStream, int64_t smaId) {
   SSdb*       pSdb = pMnode->pSdb;
   SQueryPlan* pPlan = qStringToQueryPlan(pStream->physicalPlan);
   if (pPlan == NULL) {
@@ -164,6 +164,10 @@ int32_t mndScheduleStream(SMnode* pMnode, STrans* pTrans, SStreamObj* pStream) {
           // only for inplace
           pTask->sinkType = TASK_SINK__SHOW;
           pTask->showSink.reserved = 0;
+          if (smaId != -1) {
+            pTask->sinkType = TASK_SINK__SMA;
+            pTask->smaSink.smaId = smaId;
+          }
         } else {
           pTask->sinkType = TASK_SINK__NONE;
         }

source/dnode/mnode/impl/src/mndSma.c

@@ -69,7 +69,8 @@ void mndCleanupSma(SMnode *pMnode) {}
 static SSdbRaw *mndSmaActionEncode(SSmaObj *pSma) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
 
-  int32_t  size = sizeof(SSmaObj) + pSma->exprLen + pSma->tagsFilterLen + pSma->sqlLen + pSma->astLen + TSDB_SMA_RESERVE_SIZE;
+  int32_t size =
+      sizeof(SSmaObj) + pSma->exprLen + pSma->tagsFilterLen + pSma->sqlLen + pSma->astLen + TSDB_SMA_RESERVE_SIZE;
   SSdbRaw *pRaw = sdbAllocRaw(SDB_SMA, TSDB_SMA_VER_NUMBER, size);
   if (pRaw == NULL) goto _OVER;
 
@@ -427,7 +428,7 @@ static int32_t mndCreateSma(SMnode *pMnode, SNodeMsg *pReq, SMCreateSmaReq *pCre
   if (mndSetCreateSmaRedoLogs(pMnode, pTrans, &smaObj) != 0) goto _OVER;
   if (mndSetCreateSmaCommitLogs(pMnode, pTrans, &smaObj) != 0) goto _OVER;
   if (mndSetCreateSmaRedoActions(pMnode, pTrans, pDb, &smaObj) != 0) goto _OVER;
-  if (mndAddStreamToTrans(pMnode, &streamObj, pCreate->ast, pTrans) != 0) goto _OVER;
+  if (mndAddStreamToTrans(pMnode, &streamObj, pCreate->ast, pTrans, smaObj.uid) != 0) goto _OVER;
   if (mndTransPrepare(pMnode, pTrans) != 0) goto _OVER;
 
   code = 0;
@@ -491,7 +492,7 @@ static int32_t mndProcessMCreateSmaReq(SNodeMsg *pReq) {
     mError("sma:%s, failed to create since stb:%s not exist", createReq.name, createReq.stb);
     goto _OVER;
   }
-  
+
   pStream = mndAcquireStream(pMnode, createReq.name);
   if (pStream != NULL) {
     mError("sma:%s, failed to create since stream:%s already exist", createReq.name, createReq.name);

source/dnode/mnode/impl/src/mndStream.c

@@ -246,7 +246,7 @@ static int32_t mndStreamGetPlanString(const char *ast, char **pStr) {
   return code;
 }
 
-int32_t mndAddStreamToTrans(SMnode *pMnode, SStreamObj *pStream, const char *ast, STrans *pTrans) {
+int32_t mndAddStreamToTrans(SMnode *pMnode, SStreamObj *pStream, const char *ast, STrans *pTrans, int64_t smaId) {
   SNode *pAst = NULL;
 
   if (nodesStringToNode(ast, &pAst) < 0) {
@@ -271,7 +271,7 @@ int32_t mndAddStreamToTrans(SMnode *pMnode, SStreamObj *pStream, const char *ast
     return -1;
   }
 
-  if (mndScheduleStream(pMnode, pTrans, pStream) < 0) {
+  if (mndScheduleStream(pMnode, pTrans, pStream, smaId) < 0) {
     mError("stream:%ld, schedule stream since %s", pStream->uid, terrstr());
     return -1;
   }
@@ -310,7 +310,7 @@ static int32_t mndCreateStream(SMnode *pMnode, SNodeMsg *pReq, SCMCreateStreamRe
   }
   mDebug("trans:%d, used to create stream:%s", pTrans->id, pCreate->name);
 
-  if (mndAddStreamToTrans(pMnode, &streamObj, pCreate->ast, pTrans) != 0) {
+  if (mndAddStreamToTrans(pMnode, &streamObj, pCreate->ast, pTrans, -1) != 0) {
     mError("trans:%d, failed to add stream since %s", pTrans->id, terrstr());
     mndTransDrop(pTrans);
     return -1;

source/dnode/vnode/src/inc/vnd.h

@@ -198,10 +198,13 @@ int tqCommit(STQ*);
 int32_t tqProcessPollReq(STQ* pTq, SRpcMsg* pMsg);
 int32_t tqProcessSetConnReq(STQ* pTq, char* msg);
 int32_t tqProcessRebReq(STQ* pTq, char* msg);
-int32_t tqProcessTaskExec(STQ* pTq, SRpcMsg* msg);
+int32_t tqProcessTaskExec(STQ* pTq, char* msg, int32_t msgLen);
 int32_t tqProcessTaskDeploy(STQ* pTq, char* msg, int32_t msgLen);
 int32_t tqProcessStreamTrigger(STQ* pTq, void* data, int32_t dataLen);
 
+// sma
+void smaHandleRes(SVnode* pVnode, int64_t smaId, const SArray* data);
+
 #ifdef __cplusplus
 }
 #endif

source/dnode/vnode/src/tq/tq.c

@@ -476,6 +476,7 @@ int32_t tqProcessTaskDeploy(STQ* pTq, char* msg, int32_t msgLen) {
   if (tqExpandTask(pTq, pTask, 4) < 0) {
     ASSERT(0);
   }
+  pTask->ahandle = pTq->pVnode;
 
   taosHashPut(pTq->pStreamTasks, &pTask->taskId, sizeof(int32_t), pTask, sizeof(SStreamTask));
 
@@ -497,11 +498,9 @@ int32_t tqProcessStreamTrigger(STQ* pTq, void* data, int32_t dataLen) {
   return 0;
 }
 
-int32_t tqProcessTaskExec(STQ* pTq, SRpcMsg* msg) {
-  char* msgstr = POINTER_SHIFT(msg->pCont, sizeof(SMsgHead));
-
+int32_t tqProcessTaskExec(STQ* pTq, char* msg, int32_t msgLen) {
   SStreamTaskExecReq req;
-  tDecodeSStreamTaskExecReq(msgstr, &req);
+  tDecodeSStreamTaskExecReq(msg, &req);
 
   int32_t      taskId = req.taskId;
   SStreamTask* pTask = taosHashGet(pTq->pStreamTasks, &taskId, sizeof(int32_t));

source/dnode/vnode/src/vnd/vnodeQuery.c

@@ -43,6 +43,8 @@ int vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg) {
 
 int vnodeProcessFetchMsg(SVnode *pVnode, SRpcMsg *pMsg) {
   vTrace("message in fetch queue is processing");
+  char   *msgstr = POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead));
+  int32_t msgLen = pMsg->contLen - sizeof(SMsgHead);
   switch (pMsg->msgType) {
     case TDMT_VND_FETCH:
       return qWorkerProcessFetchMsg(pVnode, pVnode->pQuery, pMsg);
@@ -65,10 +67,9 @@ int vnodeProcessFetchMsg(SVnode *pVnode, SRpcMsg *pMsg) {
       return vnodeGetTableMeta(pVnode, pMsg);
     case TDMT_VND_CONSUME:
       return tqProcessPollReq(pVnode->pTq, pMsg);
-    case TDMT_VND_TASK_EXEC:
     case TDMT_VND_TASK_PIPE_EXEC:
     case TDMT_VND_TASK_MERGE_EXEC:
-      return tqProcessTaskExec(pVnode->pTq, pMsg);
+      return tqProcessTaskExec(pVnode->pTq, msgstr, msgLen);
     case TDMT_VND_STREAM_TRIGGER:
       return tqProcessStreamTrigger(pVnode->pTq, pMsg->pCont, pMsg->contLen);
     case TDMT_VND_QUERY_HEARTBEAT:

source/dnode/vnode/src/vnd/vnodeWrite.c

@@ -178,6 +178,11 @@ int vnodeApplyWMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
                               pMsg->contLen - sizeof(SMsgHead)) < 0) {
       }
     } break;
+    case TDMT_VND_TASK_WRITE_EXEC: {
+      if (tqProcessTaskExec(pVnode->pTq, POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead)),
+                            pMsg->contLen - sizeof(SMsgHead)) < 0) {
+      }
+    } break;
     case TDMT_VND_CREATE_SMA: {  // timeRangeSMA
 #if 0
       SSmaCfg vCreateSmaReq = {0};

source/libs/stream/src/tstream.c

@@ -72,6 +72,7 @@ int32_t streamExecTask(SStreamTask* pTask, SMsgCb* pMsgCb, const void* input, in
   if (pTask->sinkType == TASK_SINK__TABLE) {
     //
   } else if (pTask->sinkType == TASK_SINK__SMA) {
+    pTask->smaSink.smaHandle(pTask->ahandle, pTask->smaSink.smaId, pRes);
     //
   } else if (pTask->sinkType == TASK_SINK__FETCH) {
     //
@@ -205,9 +206,16 @@ int32_t tEncodeSStreamTask(SCoder* pEncoder, const SStreamTask* pTask) {
     if (tEncodeCStr(pEncoder, pTask->exec.qmsg) < 0) return -1;
   }
 
-  if (pTask->sinkType != TASK_SINK__NONE) {
-    // TODO: wrap
+  if (pTask->sinkType == TASK_SINK__TABLE) {
     if (tEncodeI8(pEncoder, pTask->tbSink.reserved) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__SMA) {
+    if (tEncodeI64(pEncoder, pTask->smaSink.smaId) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__FETCH) {
+    if (tEncodeI8(pEncoder, pTask->fetchSink.reserved) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__SHOW) {
+    if (tEncodeI8(pEncoder, pTask->showSink.reserved) < 0) return -1;
+  } else {
+    ASSERT(pTask->sinkType == TASK_SINK__NONE);
   }
 
   if (pTask->dispatchType == TASK_DISPATCH__INPLACE) {
@@ -244,8 +252,16 @@ int32_t tDecodeSStreamTask(SCoder* pDecoder, SStreamTask* pTask) {
     if (tDecodeCStrAlloc(pDecoder, &pTask->exec.qmsg) < 0) return -1;
   }
 
-  if (pTask->sinkType != TASK_SINK__NONE) {
+  if (pTask->sinkType == TASK_SINK__TABLE) {
     if (tDecodeI8(pDecoder, &pTask->tbSink.reserved) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__SMA) {
+    if (tDecodeI64(pDecoder, &pTask->smaSink.smaId) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__FETCH) {
+    if (tDecodeI8(pDecoder, &pTask->fetchSink.reserved) < 0) return -1;
+  } else if (pTask->sinkType == TASK_SINK__SHOW) {
+    if (tDecodeI8(pDecoder, &pTask->showSink.reserved) < 0) return -1;
+  } else {
+    ASSERT(pTask->sinkType == TASK_SINK__NONE);
   }
 
   if (pTask->dispatchType == TASK_DISPATCH__INPLACE) {

source/libs/tdb/src/db/tdbPCache.c

@@ -122,7 +122,7 @@ static void tdbPCacheClearLock(SPCache *pCache) { tdbMutexDestroy(&(pCache->mute
 
 static void tdbPCacheLock(SPCache *pCache) { tdbMutexLock(&(pCache->mutex)); }
 
-static void tdbPCacheUnlock(SPCache *pCache) { tdbMutexDestroy(&(pCache->mutex)); }
+static void tdbPCacheUnlock(SPCache *pCache) { tdbMutexUnlock(&(pCache->mutex)); }
 
 static bool tdbPCacheLocked(SPCache *pCache) {
   assert(0);

source/libs/tdb/src/db/tdbPager.c

@@ -80,7 +80,7 @@ int tdbPagerOpen(SPCache *pCache, const char *fileName, SPager **ppPager) {
   // pPager->pCache
   pPager->pCache = pCache;
 
-  pPager->fd = tdbOsOpen(pPager->dbFileName, O_RDWR | O_CREAT);
+  pPager->fd = tdbOsOpen(pPager->dbFileName, TDB_O_CREAT | TDB_O_RDWR, 0755);
   if (pPager->fd < 0) {
     return -1;
   }
@@ -168,7 +168,7 @@ int tdbPagerBegin(SPager *pPager) {
   }
 
   // Open the journal
-  pPager->jfd = tdbOsOpen(pPager->jFileName, O_RDWR | O_CREAT);
+  pPager->jfd = tdbOsOpen(pPager->jFileName, TDB_O_CREAT | TDB_O_RDWR, 0755);
   if (pPager->jfd < 0) {
     return -1;
   }

source/libs/tdb/src/inc/tdbOs.h

@@ -23,30 +23,27 @@ extern "C" {
 // TODO: use cmake to control the option
 #define TDB_FOR_TDENGINE
 
-// For memory -----------------
 #ifdef TDB_FOR_TDENGINE
 
+// For memory -----------------
 #define tdbOsMalloc  taosMemoryMalloc
 #define tdbOsCalloc  taosMemoryCalloc
 #define tdbOsRealloc taosMemoryRealloc
 #define tdbOsFree    taosMemoryFree
 
-#else
-
-#define tdbOsMalloc  malloc
-#define tdbOsCalloc  calloc
-#define tdbOsRealloc realloc
-#define tdbOsFree    free
-
-#endif
-
 // For file and directory -----------------
-#ifdef TDB_FOR_TDENGINE
-
 /* file */
 typedef TdFilePtr tdb_fd_t;
 
-#define tdbOsOpen      taosOpenFile
+#define TDB_O_CREAT  TD_FILE_CTEATE
+#define TDB_O_WRITE  TD_FILE_WRITE
+#define TDB_O_READ   TD_FILE_READ
+#define TDB_O_TRUNC  TD_FILE_TRUNC
+#define TDB_O_APPEND TD_FILE_APPEND
+#define TDB_O_RDWR   (TD_FILE_WRITE) | (TD_FILE_READ)
+
+#define tdbOsOpen(PATH, OPTION, MODE) taosOpenFile((PATH), (OPTION))
+
 #define tdbOsClose(FD) taosCloseFile(&(FD))
 #define tdbOsRead      taosReadFile
 #define tdbOsPRead     taosPReadFile
@@ -59,31 +56,7 @@ typedef TdFilePtr tdb_fd_t;
 #define tdbOsMkdir taosMkDir
 #define tdbOsRmdir taosRemoveDir
 
-#else
-
-/* file */
-typedef int tdb_fd_t;
-
-#define tdbOsOpen  open
-#define tdbOsClose close
-
-i64 tdbOsRead(tdb_fd_t fd, void *pData, i64 nBytes);
-i64 tdbOsPRead(tdb_fd_t fd, void *pData, i64 nBytes, i64 offset);
-i64 tdbOsWrite(tdb_fd_t fd, const void *pData, i64 nBytes);
-
-#define tdbOsFSync  fsync
-#define tdbOsLSeek  lseek
-#define tdbOsRemove remove
-
-/* directory */
-#define tdbOsMkdir  mkdir
-#define tdbOsRmdir  rmdir
-
-#endif
-
 // For threads and lock -----------------
-#ifdef TDB_FOR_TDENGINE
-
 /* spin lock */
 typedef TdThreadSpinlock tdb_spinlock_t;
 
@@ -103,6 +76,40 @@ typedef TdThreadMutex tdb_mutex_t;
 
 #else
 
+// For memory -----------------
+#define tdbOsMalloc  malloc
+#define tdbOsCalloc  calloc
+#define tdbOsRealloc realloc
+#define tdbOsFree    free
+
+// For file and directory -----------------
+/* file */
+typedef int tdb_fd_t;
+
+#define TDB_O_CREAT  O_CREAT
+#define TDB_O_WRITE  O_WRONLY
+#define TDB_O_READ   O_RDONLY
+#define TDB_O_TRUNC  O_TRUNC
+#define TDB_O_APPEND O_APPEND
+#define TDB_O_RDWR   O_RDWR
+
+#define tdbOsOpen(PATH, OPTION, MODE) open((PATH), (OPTION), (MODE))
+
+#define tdbOsClose close
+
+i64 tdbOsRead(tdb_fd_t fd, void *pData, i64 nBytes);
+i64 tdbOsPRead(tdb_fd_t fd, void *pData, i64 nBytes, i64 offset);
+i64 tdbOsWrite(tdb_fd_t fd, const void *pData, i64 nBytes);
+
+#define tdbOsFSync  fsync
+#define tdbOsLSeek  lseek
+#define tdbOsRemove remove
+
+/* directory */
+#define tdbOsMkdir  mkdir
+#define tdbOsRmdir  rmdir
+
+// For threads and lock -----------------
 /* spin lock */
 typedef pthread_spinlock_t tdb_spinlock_t;