From f9950799fc21c6847d13f93aaec2cd6a555d546a Mon Sep 17 00:00:00 2001
From: Christian Grothoff <christian@grothoff.org>
Date: Tue, 4 Jul 2017 23:28:03 +0200
Subject: eliminate dead macros

---
 src/exchangedb/plugin_exchangedb_postgres.c | 34 ++++++++++++++++++++++++++++-
 1 file changed, 33 insertions(+), 1 deletion(-)

(limited to 'src/exchangedb/plugin_exchangedb_postgres.c')

diff --git a/src/exchangedb/plugin_exchangedb_postgres.c b/src/exchangedb/plugin_exchangedb_postgres.c
index b6241c8f..de3c783e 100644
--- a/src/exchangedb/plugin_exchangedb_postgres.c
+++ b/src/exchangedb/plugin_exchangedb_postgres.c
@@ -1477,6 +1477,33 @@ db_conn_destroy (void *cls)
 }
 
 
+/**
+ * Reset the thread-local database-handle.  Disconnects from the DB.
+ * Needed after the database server restarts as we need to properly
+ * reconnect.
+ *
+ * @param cls the `struct PostgresClosure` with the plugin-specific state
+ * @return the database connection, or NULL on error
+ */
+static void
+postgres_reset_session (void *cls)
+{
+  struct PostgresClosure *pc = cls;
+  struct TALER_EXCHANGEDB_Session *session;
+
+  if (NULL != (session = pthread_getspecific (pc->db_conn_threadlocal)))
+    return;
+  if (0 != pthread_setspecific (pc->db_conn_threadlocal,
+                                NULL))
+  {
+    GNUNET_break (0);
+    return;
+  }
+  PQfinish (session->conn);
+  GNUNET_free (session);
+}
+
+
 /**
  * Get the thread-local database-handle.
  * Connect to the db if the connection does not exist yet.
@@ -1492,7 +1519,12 @@ postgres_get_session (void *cls)
   struct TALER_EXCHANGEDB_Session *session;
 
   if (NULL != (session = pthread_getspecific (pc->db_conn_threadlocal)))
-    return session;
+  {
+    if (CONNECTION_BAD == PQstatus (session->conn))
+      postgres_reset_session (pc);
+    else
+      return session;
+  }
   db_conn = GNUNET_PQ_connect (pc->connection_cfg_str);
   if (NULL == db_conn)
     return NULL;
-- 
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