[evolution-data-server] Bug 793031 - Decrease memory usage by disabling backend-per-process by default

[Milan Crha <mcrha src gnome org>]

commit 2b058c94b083949c9376d9ce238e09478f66af5b
Author: Milan Crha <mcrha redhat com>
Date:   Fri Feb 23 12:24:07 2018 +0100

    Bug 793031 - Decrease memory usage by disabling backend-per-process by default

 CMakeLists.txt                   |    2 +-
 src/libebackend/e-data-factory.c |   29 ++++++++++++++++++++---------
 2 files changed, 21 insertions(+), 10 deletions(-)
---
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 0593719..59d4dbf 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -463,7 +463,7 @@ endif(ENABLE_UOA)
 # Check if backend per process should be enabled
 # **********************************************
 
-add_printable_option(ENABLE_BACKEND_PER_PROCESS "Enable backend per process support" ON)
+add_printable_option(ENABLE_BACKEND_PER_PROCESS "Enable backend per process support" OFF)
 
 # ***********************************
 # Check for libsecret and gcr-base
diff --git a/src/libebackend/e-data-factory.c b/src/libebackend/e-data-factory.c
index 26faa6a..0da6628 100644
--- a/src/libebackend/e-data-factory.c
+++ b/src/libebackend/e-data-factory.c
@@ -286,14 +286,9 @@ data_factory_subprocess_data_free (DataFactorySubprocessData *sd)
        }
 }
 
-static gchar *
-data_factory_dup_subprocess_helper_hash_key (gint override_backend_per_process,
-                                            const gchar *factory_name,
-                                            const gchar *extension_name,
-                                            const gchar *uid,
-                                            gboolean backend_factory_share_subprocess)
+static gboolean
+data_factory_use_backend_per_process (gint override_backend_per_process)
 {
-       gchar *helper_hash_key;
        gboolean backend_per_process;
 
        if (override_backend_per_process == 0 || override_backend_per_process == 1) {
@@ -306,7 +301,19 @@ data_factory_dup_subprocess_helper_hash_key (gint override_backend_per_process,
                #endif
        }
 
-       if (backend_per_process) {
+       return backend_per_process;
+}
+
+static gchar *
+data_factory_dup_subprocess_helper_hash_key (gint override_backend_per_process,
+                                            const gchar *factory_name,
+                                            const gchar *extension_name,
+                                            const gchar *uid,
+                                            gboolean backend_factory_share_subprocess)
+{
+       gchar *helper_hash_key;
+
+       if (data_factory_use_backend_per_process (override_backend_per_process)) {
                helper_hash_key = backend_factory_share_subprocess ?
                        g_strdup (factory_name) : g_strdup_printf ("%s:%s:%s", factory_name, extension_name, 
uid);
        } else {
@@ -1268,6 +1275,8 @@ data_factory_spawn_subprocess_backend (EDataFactory *data_factory,
        g_free (backend_name);
 
        if (backend_factory) {
+               gboolean backend_per_process;
+
                type_name = G_OBJECT_TYPE_NAME (backend_factory);
 
                class = E_DATA_FACTORY_GET_CLASS (data_factory);
@@ -1333,11 +1342,13 @@ data_factory_spawn_subprocess_backend (EDataFactory *data_factory,
                g_hash_table_insert (priv->subprocess_watched_ids, g_strdup (sd->bus_name), GUINT_TO_POINTER 
(watched_id));
                g_mutex_unlock (&priv->subprocess_watched_ids_lock);
 
+               backend_per_process = data_factory_use_backend_per_process 
(e_data_factory_get_backend_per_process (data_factory));
+
                subprocess = g_subprocess_new (
                        G_SUBPROCESS_FLAGS_NONE,
                        &error,
                        subprocess_path,
-                       "--factory", sd->factory_name,
+                       "--factory", backend_per_process ? sd->factory_name : "all",
                        "--bus-name", sd->bus_name,
                        "--own-path", sd->path,
                        NULL);