+#define BUSY_WAITING_USEC (1000000 / 10 / 2) /* 0.05 sec */
+#define BUSY_WAITING_MAX 40 /* wait for max 2 sec */
+static int __db_busy_handler(void *data, int count)
+{
+ if (count < BUSY_WAITING_MAX) {
+ usleep(BUSY_WAITING_USEC);
+ return 1;
+ } else {
+ /* sqlite3_prepare_v2 will return SQLITE_BUSY */
+ return 0;
+ }
+}
+
+int __open_db(const char *path, sqlite3 **db, int flags)
+{
+ int ret;
+
+ ret = sqlite3_open_v2(path, db, flags, NULL);
+ if (ret != SQLITE_OK)
+ return ret;
+
+ ret = sqlite3_busy_handler(*db, __db_busy_handler, NULL);
+ if (ret != SQLITE_OK) {
+ _LOGE("failed to register busy handler: %s",
+ sqlite3_errmsg(*db));
+ sqlite3_close_v2(*db);
+ return ret;
+ }
+
+ return ret;
+}
+
+struct type_map {
+ const char *manifest;
+ const char *type;
+};
+
+struct type_map type_map[] = {
+ { "res/wgt/config.xml", "wgt" },
+ { "config.xml", "wgt" },
+ { "tizen-manifest.xml", "tpk" },
+ { NULL, NULL}
+};
+
+char *__get_type_from_path(const char *pkg_path)
+{
+ const char *type = NULL;
+ unzFile uf;
+ int i;
+
+ uf = unzOpen(pkg_path);
+ if (uf == NULL) {
+ _LOGE("failed to open zip file %s", pkg_path);
+ return NULL;
+ }
+
+ for (i = 0; type_map[i].manifest != NULL; i++) {
+ if (unzLocateFile(uf, type_map[i].manifest, 0) == UNZ_OK) {
+ _LOGD("pkgtype of %s: [%s]", pkg_path,
+ type_map[i].type);
+ type = type_map[i].type;
+ break;
+ }
+ }
+ unzClose(uf);
+
+ if (type == NULL) {
+ _LOGE("cannot get pkg type of file %s", pkg_path);
+ return NULL;
+ }
+
+ return strdup(type);
+}
+
+static const char *__get_library_path(const char *pkg_type)
+{
+ char buf[64];
+ const char *path;
+
+ snprintf(buf, sizeof(buf), "package-manager/backendlib/lib%s.so",
+ pkg_type);
+ path = tzplatform_mkpath(TZ_SYS_RO_ETC, buf);
+
+ return path;
+}
+
+pkg_plugin_set *__load_library(const char *pkg_type)
+{
+ void *library_handle;
+ pkg_plugin_set *plugin_set;
+ bool (*on_load)(pkg_plugin_set *plugin);
+ const char *library_path;
+
+ library_path = __get_library_path(pkg_type);
+ if (library_path == NULL) {
+ _LOGE("cannot get library path for %s", pkg_type);
+ return NULL;
+ }
+
+ if (plugin_set_list == NULL) {
+ plugin_set_list = g_hash_table_new_full(g_str_hash,
+ g_str_equal, free, free);
+ if (plugin_set_list == NULL) {
+ _LOGE("out of memory");
+ return NULL;
+ }
+ }
+
+ plugin_set = (pkg_plugin_set *)g_hash_table_lookup(plugin_set_list,
+ (gconstpointer)pkg_type);
+ if (plugin_set) {
+ _LOGD("already loaded [%s]", library_path);
+ return plugin_set;
+ }
+
+ if ((library_handle = dlopen(library_path, RTLD_LAZY)) == NULL) {
+ _LOGE("dlopen is failed library_path[%s]", library_path);
+ return NULL;
+ }
+
+ if ((on_load = dlsym(library_handle, "pkg_plugin_on_load")) == NULL ||
+ dlerror() != NULL) {
+ _LOGE("cannot find symbol");
+ dlclose(library_handle);
+ return NULL;
+ }
+
+ plugin_set = (pkg_plugin_set *)calloc(1, sizeof(pkg_plugin_set));
+ if (plugin_set == NULL) {
+ _LOGE("out of memory");
+ dlclose(library_handle);
+ return NULL;
+ }
+
+ if (on_load(plugin_set) != 0) {
+ _LOGE("pkg_plugin_on_load failed");
+ free(plugin_set);
+ dlclose(library_handle);
+ plugin_set = NULL;
+ return NULL;
+ }
+
+ plugin_set->plugin_handle = library_handle;
+ snprintf(plugin_set->pkg_type,
+ sizeof(plugin_set->pkg_type), "%s", pkg_type);
+
+ g_hash_table_insert(plugin_set_list, (gpointer)strdup(pkg_type),
+ (gpointer)plugin_set);
+
+ _LOGD("library [%s] is loaded", library_path);
+
+ return plugin_set;
+}
+
+void __unload_library(const char *pkg_type)
+{
+ pkg_plugin_set *plugin_set;
+
+ if (plugin_set_list == NULL)
+ return;
+
+ plugin_set = (pkg_plugin_set *)g_hash_table_lookup(plugin_set_list,
+ (gconstpointer)pkg_type);
+
+ if (plugin_set == NULL) {
+ _LOGE("pkg plugin for %s is not loaded", pkg_type);
+ return;
+ }
+
+ plugin_set->plugin_on_unload();
+ dlclose(plugin_set->plugin_handle);
+ g_hash_table_remove(plugin_set_list, (gconstpointer)pkg_type);
+}