6 files changed, 17 insertions, 3 deletions
diff --git a/libbrep/build-extra.sql b/libbrep/build-extra.sql
index 0c0f010..3134fbb 100644
--- a/libbrep/build-extra.sql
+++ b/libbrep/build-extra.sql
@@ -50,6 +50,7 @@ CREATE FOREIGN TABLE build_tenant (
   archived BOOLEAN NOT NULL,
   service_id TEXT NULL,
   service_type TEXT NULL,
+  service_ref_count BIGINT NULL,
   service_data TEXT NULL,
   unloaded_timestamp BIGINT NULL,
   unloaded_notify_interval BIGINT NULL,
diff --git a/libbrep/build.hxx b/libbrep/build.hxx
index b485636..5ebbb0c 100644
--- a/libbrep/build.hxx
+++ b/libbrep/build.hxx
@@ -28,7 +28,7 @@
 //
 #define LIBBREP_BUILD_SCHEMA_VERSION_BASE 28
 
-#pragma db model version(LIBBREP_BUILD_SCHEMA_VERSION_BASE, 28, closed)
+#pragma db model version(LIBBREP_BUILD_SCHEMA_VERSION_BASE, 29, closed)
 
 // We have to keep these mappings at the global scope instead of inside the
 // brep namespace because they need to be also effective in the bbot namespace
diff --git a/libbrep/build.xml b/libbrep/build.xml
index d58e5f4..284db49 100644
--- a/libbrep/build.xml
+++ b/libbrep/build.xml
@@ -1,4 +1,6 @@
 <changelog xmlns="http://www.codesynthesis.com/xmlns/odb/changelog" database="pgsql" schema-name="build" version="1">
+  <changeset version="29"/>
+
   <model version="28">
     <table name="build" kind="object">
       <column name="package_tenant" type="TEXT" null="false"/>
diff --git a/libbrep/common.hxx b/libbrep/common.hxx
index d2009f5..22302f3 100644
--- a/libbrep/common.hxx
+++ b/libbrep/common.hxx
@@ -543,17 +543,22 @@ namespace brep
   //
   // Note that the {id, type} pair must be unique.
   //
+  // The reference count is used to keep track of the number of attempts to
+  // create a duplicate tenant with this {id, type} (see ci_start::create()
+  // for details).
+  //
   #pragma db value
   struct tenant_service
   {
     string id;
     string type;
+    uint64_t ref_count;
     optional<string> data;
 
     tenant_service () = default;
 
     tenant_service (string i, string t, optional<string> d = nullopt)
-        : id (move (i)), type (move (t)), data (move (d)) {}
+        : id (move (i)), type (move (t)), ref_count (1), data (move (d)) {}
   };
 
   // Version comparison operators.
diff --git a/libbrep/package.hxx b/libbrep/package.hxx
index 79b2c68..2714d10 100644
--- a/libbrep/package.hxx
+++ b/libbrep/package.hxx
@@ -20,7 +20,7 @@
 //
 #define LIBBREP_PACKAGE_SCHEMA_VERSION_BASE 34
 
-#pragma db model version(LIBBREP_PACKAGE_SCHEMA_VERSION_BASE, 35, closed)
+#pragma db model version(LIBBREP_PACKAGE_SCHEMA_VERSION_BASE, 36, closed)
 
 namespace brep
 {
diff --git a/libbrep/package.xml b/libbrep/package.xml
index 8b6c706..ac48ec4 100644
--- a/libbrep/package.xml
+++ b/libbrep/package.xml
@@ -1,4 +1,10 @@
 <changelog xmlns="http://www.codesynthesis.com/xmlns/odb/changelog" database="pgsql" schema-name="package" version="1">
+  <changeset version="36">
+    <alter-table name="tenant">
+      <add-column name="service_ref_count" type="BIGINT" null="true"/>
+    </alter-table>
+  </changeset>
+
   <changeset version="35">
     <alter-table name="package">
       <add-column name="reviews_pass" type="BIGINT" null="true"/>