1 files changed, 80 insertions, 0 deletions
diff --git a/src/mm-port-probe-cache.c b/src/mm-port-probe-cache.c
new file mode 100644
index 00000000..113b5774
--- /dev/null
+++ b/src/mm-port-probe-cache.c
@@ -0,0 +1,80 @@
+/* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details:
+ *
+ * Copyright (C) 2011 Aleksander Morgado <aleksander@gnu.org>
+ */
+
+#include <glib.h>
+
+#include "mm-port-probe.h"
+#include "mm-port-probe-cache.h"
+
+/* Cache of port probing objects */
+static GHashTable *cache;
+
+static gchar *
+get_key (GUdevDevice *port)
+{
+    return g_strdup_printf ("%s%s",
+                            g_udev_device_get_subsystem (port),
+                            g_udev_device_get_name (port));
+}
+
+MMPortProbe *
+mm_port_probe_cache_get (GUdevDevice *port,
+                         const gchar *physdev_path,
+                         const gchar *driver)
+{
+    MMPortProbe *probe = NULL;
+    gchar *key;
+
+    key = get_key (port);
+
+    if (G_UNLIKELY (!cache)) {
+        cache = g_hash_table_new_full (g_str_hash,
+                                       g_str_equal,
+                                       g_free,
+                                       g_object_unref);
+    } else {
+        probe = g_hash_table_lookup (cache, key);
+    }
+
+    if (!probe) {
+        probe = mm_port_probe_new (port, physdev_path, driver);
+        g_hash_table_insert (cache, key, probe);
+        key = NULL;
+    }
+
+    g_free (key);
+    return g_object_ref (probe);
+}
+
+void
+mm_port_probe_cache_remove (GUdevDevice *port)
+{
+    MMPortProbe *probe = NULL;
+    gchar *key;
+
+    if (G_UNLIKELY (!cache))
+        return;
+
+    key = get_key (port);
+    probe = g_hash_table_lookup (cache, key);
+    if (probe) {
+        mm_port_probe_run_cancel (probe);
+        g_object_unref (probe);
+    }
+    g_hash_table_remove (cache, key);
+    g_free (key);
+}
+
+