-DCE, nicer return values

src/exchange-tools/taler-exchange-dbinit.c

@@ -128,7 +128,7 @@ run (void *cls,
  *
  * @param argc number of arguments from the command line
  * @param argv command line arguments
- * @return 0 ok, 1 on error
+ * @return 0 ok, non-zero on error
  */
 int
 main (int argc,

src/exchangedb/plugin_exchangedb_postgres.c

@@ -130,12 +130,6 @@ struct PostgresClosure
    */
   const char *transaction_name;
 
-  /**
-   * Number of registered listerners. @e event_thread
-   * should terminate if this value reaches 0.
-   */
-  uint64_t listener_count;
-
   /**
    * Did we initialize the prepared statements
    * for this session?
@@ -151,7 +145,7 @@ struct PostgresClosure
  * @param cls the `struct PostgresClosure` with the plugin-specific state
  * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
  */
-static int
+static enum GNUNET_GenericReturnValue
 postgres_drop_tables (void *cls)
 {
   struct PostgresClosure *pg = cls;
@@ -175,7 +169,7 @@ postgres_drop_tables (void *cls)
  * @param cls the `struct PostgresClosure` with the plugin-specific state
  * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
  */
-static int
+static enum GNUNET_GenericReturnValue
 postgres_create_tables (void *cls)
 {
   struct PostgresClosure *pg = cls;
@@ -2613,7 +2607,7 @@ postgres_preflight (void *cls)
  *             must point to a constant
  * @return #GNUNET_OK on success
  */
-static int
+static enum GNUNET_GenericReturnValue
 postgres_start (void *cls,
                 const char *name)
 {
@@ -2651,7 +2645,7 @@ postgres_start (void *cls,
  *             must point to a constant
  * @return #GNUNET_OK on success
  */
-static int
+static enum GNUNET_GenericReturnValue
 postgres_start_read_committed (void *cls,
                                const char *name)
 {

src/include/taler_exchangedb_plugin.h

@@ -2059,7 +2059,7 @@ struct TALER_EXCHANGEDB_Plugin
    * @param cls the @e cls of this struct with the plugin-specific state
    * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
    */
-  int
+  enum GNUNET_GenericReturnValue
   (*drop_tables)(void *cls);
 
 
@@ -2069,7 +2069,7 @@ struct TALER_EXCHANGEDB_Plugin
    * @param cls the @e cls of this struct with the plugin-specific state
    * @return #GNUNET_OK upon success; #GNUNET_SYSERR upon failure
    */
-  int
+  enum GNUNET_GenericReturnValue
   (*create_tables)(void *cls);
 
 
@@ -2081,7 +2081,7 @@ struct TALER_EXCHANGEDB_Plugin
    *             must point to a constant
    * @return #GNUNET_OK on success
    */
-  int
+  enum GNUNET_GenericReturnValue
   (*start)(void *cls,
            const char *name);
 
@@ -2094,7 +2094,7 @@ struct TALER_EXCHANGEDB_Plugin
    *             must point to a constant
    * @return #GNUNET_OK on success
    */
-  int
+  enum GNUNET_GenericReturnValue
   (*start_read_committed)(void *cls,
                           const char *name);