TD-153: fix bugs

src/util/inc/exception.h

@@ -52,6 +52,22 @@ typedef struct SCleanupAction {
     } arg1, arg2;
 } SCleanupAction;
 
+
+/*
+ * exception hander registration
+ */
+typedef struct SExceptionNode {
+   struct SExceptionNode* prev;
+   jmp_buf jb;
+   int32_t code;
+   int32_t maxCleanupAction;
+   int32_t numCleanupAction;
+   SCleanupAction* cleanupActions;
+} SExceptionNode;
+
+////////////////////////////////////////////////////////////////////////////////
+// functions & macros for auto-cleanup
+
 void cleanupPush_void_ptr_ptr   ( bool failOnly, void* func, void* arg1, void* arg2 );
 void cleanupPush_void_ptr_bool  ( bool failOnly, void* func, void* arg1, bool arg2 );
 void cleanupPush_void_ptr       ( bool failOnly, void* func, void* arg );
@@ -59,7 +75,8 @@ void cleanupPush_int_int        ( bool failOnly, void* func, int arg );
 void cleanupPush_void           ( bool failOnly, void* func );
 
 int32_t cleanupGetActionCount();
-void cleanupExecute( int32_t anchor, bool failed );
+void cleanupExecuteTo( int32_t anchor, bool failed );
+void cleanupExecute( SExceptionNode* node, bool failed );
 
 #define CLEANUP_PUSH_VOID_PTR_PTR( failOnly, func, arg1, arg2 )  cleanupPush_void_ptr_ptr( (failOnly), (void*)(func), (void*)(arg1), (void*)(arg2) )
 #define CLEANUP_PUSH_VOID_PTR_BOOL( failOnly, func, arg1, arg2 ) cleanupPush_void_ptr_bool( (failOnly), (void*)(func), (void*)(arg1), (bool)(arg2) )
@@ -69,20 +86,12 @@ void cleanupExecute( int32_t anchor, bool failed );
 #define CLEANUP_PUSH_FREE( failOnly, arg )                       cleanupPush_void_ptr( (failOnly), free, (void*)(arg) )
 #define CLEANUP_PUSH_CLOSE( failOnly, arg )                      cleanupPush_int_int( (failOnly), close, (int)(arg) )
 
-#define CLEANUP_CREATE_ANCHOR()     int32_t cleanupAnchor = cleanupGetActionCount()
-#define CLEANUP_EXECUTE( failed )   cleanupExecute( cleanupAnchor, (failed) )
+#define CLEANUP_GET_ANCHOR()          cleanupGetActionCount()
+#define CLEANUP_EXECUTE_TO( anchor, failed )  cleanupExecuteTo( (anchor), (failed) )
 
-/*
- * exception hander registration
- */
-typedef struct SExceptionNode {
-   struct SExceptionNode* prev;
-   jmp_buf jb;
-   int32_t code;
-   int32_t maxCleanupAction;
-   int32_t numCleanupAction;
-   SCleanupAction* cleanupActions;
-} SExceptionNode;
+
+////////////////////////////////////////////////////////////////////////////////
+// functions & macros for exception handling
 
 void exceptionPushNode( SExceptionNode* node );
 int32_t exceptionPopNode();
@@ -90,23 +99,23 @@ void exceptionThrow( int code );
 
 #define TRY(maxCleanupActions) do { \
     SExceptionNode exceptionNode = { 0 }; \
-    SDeferedOperation cleanupActions[maxCleanupActions > 0 ? maxCleanupActions : 1]; \
-    exceptionNode.maxCleanupAction = maxCleanupActions > 0 ? maxDefered : 1; \
+    SCleanupAction cleanupActions[(maxCleanupActions) > 0 ? (maxCleanupActions) : 1]; \
+    exceptionNode.maxCleanupAction = (maxCleanupActions) > 0 ? (maxCleanupActions) : 1; \
     exceptionNode.cleanupActions = cleanupActions; \
-    int32_t cleanupAnchor = 0; \
     exceptionPushNode( &exceptionNode ); \
     int caughtException = setjmp( exceptionNode.jb ); \
     if( caughtException == 0 )
 
 #define CATCH( code ) int code = exceptionPopNode(); \
-    if( caughtEexception == 1 )
+    if( caughtException == 1 )
 
 #define FINALLY( code ) int code = exceptionPopNode();
 
 #define END_TRY } while( 0 );
 
 #define THROW( x )          exceptionThrow( (x) )
-#define CAUGHT_EXCEPTION()  ((bool)(caughtEexception == 1))
+#define CAUGHT_EXCEPTION()  ((bool)(caughtException == 1))
+#define CLEANUP_EXECUTE()   cleanupExecute( &exceptionNode, CAUGHT_EXCEPTION() )
 
 #ifdef __cplusplus
 }

src/util/inc/tbuffer.h

@@ -23,6 +23,58 @@
 extern "C" {
 #endif
 
+////////////////////////////////////////////////////////////////////////////////
+// usage example
+/*
+#include <stdio.h>
+#include "exception.h"
+
+int main( int argc, char** argv ) {
+  SBufferWriter bw = tbufInitWriter( NULL, false );
+
+  TRY( 1 ) {
+    //--------------------- write ------------------------
+    // reserve 1024 bytes for the buffer to improve performance
+    tbufEnsureCapacity( &bw, 1024 );
+
+    // reserve space for the interger count
+    size_t pos = tbufReserve( &bw, sizeof(int32_t) );
+    // write 5 integers to the buffer
+    for( int i = 0; i < 5; i++) {
+      tbufWriteInt32( &bw, i );
+    }
+    // write the integer count to buffer at reserved position
+    tbufWriteInt32At( &bw, pos, 5 );
+
+    // write a string to the buffer
+    tbufWriteString( &bw, "this is a string.\n" );
+    // acquire the result and close the write buffer
+    size_t size = tbufTell( &bw );
+    char*  data = tbufGetData( &bw, false );
+
+    //------------------------ read -----------------------
+    SBufferReader br = tbufInitReader( data, size, false );
+    // read & print out all integers
+    int32_t count = tbufReadInt32( &br );
+    for( int i = 0; i < count; i++ ) {
+      printf( "%d\n", tbufReadInt32(&br) );
+    }
+    // read & print out a string
+    puts( tbufReadString(&br, NULL) );
+    // try read another integer, this result in an error as there no this integer
+    tbufReadInt32( &br );
+    printf( "you should not see this message.\n" );
+  } CATCH( code ) {
+    printf( "exception code is: %d, you will see this message after print out 5 integers and a string.\n", code );
+    // throw it again and the exception will be caught in main
+    THROW( code );
+  } END_TRY
+
+  tbufCloseWriter( &bw );
+  return 0;
+}
+*/
+
 typedef struct {
   bool endian;
   const char* data;
@@ -51,7 +103,7 @@ typedef struct {
 
 size_t      tbufSkip( SBufferReader* buf, size_t size );
 
-char*       tbufRead( SBufferReader* buf, size_t size );
+const char* tbufRead( SBufferReader* buf, size_t size );
 void        tbufReadToBuffer( SBufferReader* buf, void* dst, size_t size );
 const char* tbufReadString( SBufferReader* buf, size_t* len );
 size_t      tbufReadToString( SBufferReader* buf, char* dst, size_t size );

src/util/src/exception.c

@@ -114,11 +114,19 @@ int32_t cleanupGetActionCount() {
 }
 
 
-void cleanupExecute( int32_t anchor, bool failed ) {
-    while( expList->numCleanupAction > anchor ) {
-        --expList->numCleanupAction;
-        SCleanupAction *ca = expList->cleanupActions + expList->numCleanupAction;
+static void doExecuteCleanup( SExceptionNode* node, int32_t anchor, bool failed ) {
+    while( node->numCleanupAction > anchor ) {
+        --node->numCleanupAction;
+        SCleanupAction *ca = node->cleanupActions + node->numCleanupAction;
         if( failed || !(ca->failOnly) )
             wrappers[ca->wrapper]( ca );
     }
 }
+
+void cleanupExecuteTo( int32_t anchor, bool failed ) {
+    doExecuteCleanup( expList, anchor, failed );
+}
+
+void cleanupExecute( SExceptionNode* node, bool failed ) {
+    doExecuteCleanup( node, 0, failed );
+}
\ No newline at end of file

src/util/src/tbuffer.c

@@ -33,8 +33,8 @@ size_t tbufSkip(SBufferReader* buf, size_t size) {
   return old;
 }
 
-char* tbufRead( SBufferReader* buf, size_t size ) {
-  char* ret = buf->data + buf->pos;
+const char* tbufRead( SBufferReader* buf, size_t size ) {
+  const char* ret = buf->data + buf->pos;
   tbufSkip( buf, size );
   return ret;
 }
@@ -55,7 +55,7 @@ static size_t tbufReadLength( SBufferReader* buf ) {
 
 const char* tbufReadString( SBufferReader* buf, size_t* len ) {
   size_t l = tbufReadLength( buf );
-  char* ret = buf->data + buf->pos;
+  const char* ret = buf->data + buf->pos;
   tbufSkip( buf, l + 1 );
   if( ret[l] != 0 ) {
     THROW( TSDB_CODE_MEMORY_CORRUPTED );
@@ -80,7 +80,7 @@ size_t tbufReadToString( SBufferReader* buf, char* dst, size_t size ) {
 
 const char* tbufReadBinary( SBufferReader* buf, size_t *len ) {
   size_t l = tbufReadLength( buf );
-  char* ret = buf->data + buf->pos;
+  const char* ret = buf->data + buf->pos;
   tbufSkip( buf, l );
   if( len != NULL ) {
     *len = l;