minor

modules/database/src/ioc/rsrv/camsgtask.c

@@ -114,7 +114,7 @@ void camsgtask ( void *pParm )
         client->recv.cnt += ( unsigned ) nchars;
 
         status = camessage ( client );
-        if (status == 0) {
+        if (status == RSRV_OK) {
             /*
              * if there is a partial message
              * align it with the start of the buffer

modules/database/src/ioc/rsrv/server.h

@@ -55,10 +55,19 @@ typedef struct caHdrLargeArray {
 enum messageBufferType { mbtUDP, mbtSmallTCP, mbtLargeTCP };
 struct message_buffer {
   char                      *buf;
-  /*! points to first filled byte in buffer */
+  /* Invariants: stk <= cnt <= maxstk
+   *
+   * buf : |-*****-----|
+   *         ^    ^    ^
+   *         |    |    \- maxstk
+   *         |    \------ cnt
+   *         \----------- stk
+   */
+  /* points to first filled byte in buffer */
   unsigned                  stk;
+  /* allocated capacity of buffer */
   unsigned                  maxstk;
-  /*! points to first unused byte in buffer (after filled bytes) */
+  /* points to first unused byte in buffer (after filled bytes) */
   unsigned                  cnt;
   enum messageBufferType    type;
 };