c61d1e4245
This change completely refactors the way components are loaded in wireplumber: - The module_init() function must return a GObject now. This object is either a WpPlugin or a WpSiFactory in the current modules. - When the component loader initializes a module, it automatically registers the WpPlugin or WpSiFactory with their respective methods. There is no need to register the WpPlugin or WpSiFactory in the module now. - The wp_core_load_component() API has been refactored to be asynchronows. This allows the component loader to automatically activate WpPlugin objects, and therefore allows the application to directly get the WpPlugin without having to find it. This simplifies a lot of things. - The 'ifexists' and 'nofail' component flags now work even if the respective WpPlugin could not be activated. - The code that loads components in main.c has also been simplified a lot, and the option to load dangling components has also been removed.
142 lines
3.6 KiB
C
142 lines
3.6 KiB
C
/* WirePlumber
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*
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* Copyright © 2021 Collabora Ltd.
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* @author George Kiagiadakis <george.kiagiadakis@collabora.com>
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*
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* SPDX-License-Identifier: MIT
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*/
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#include <wp/wp.h>
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#include <glib-unix.h>
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#include <systemd/sd-login.h>
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#include <spa/utils/result.h>
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#include <spa/utils/string.h>
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#define NAME "logind"
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struct _WpLogind
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{
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WpPlugin parent;
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sd_login_monitor *monitor;
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GSource *source;
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char *state;
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};
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enum {
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ACTION_GET_STATE,
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SIGNAL_STATE_CHANGED,
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N_SIGNALS
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};
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static guint signals[N_SIGNALS] = {0};
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G_DECLARE_FINAL_TYPE (WpLogind, wp_logind, WP, LOGIND, WpPlugin)
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G_DEFINE_TYPE (WpLogind, wp_logind, WP_TYPE_PLUGIN)
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static void
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wp_logind_init (WpLogind * self)
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{
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}
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static gchar *
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wp_logind_get_state (WpLogind *self)
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{
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return g_strdup (self->state);
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}
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static gboolean
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wp_logind_source_ready (gint fd, GIOCondition condition, gpointer user_data)
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{
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WpLogind *self = WP_LOGIND (user_data);
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sd_login_monitor_flush (self->monitor);
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{
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char *state = NULL;
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sd_uid_get_state (getuid(), &state);
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if (g_strcmp0 (state, self->state) != 0) {
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char *tmp = state;
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state = self->state;
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self->state = tmp;
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g_signal_emit (self, signals[SIGNAL_STATE_CHANGED], 0, self->state);
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}
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free (state);
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}
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return G_SOURCE_CONTINUE;
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}
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static void
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wp_logind_enable (WpPlugin * plugin, WpTransition * transition)
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{
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WpLogind *self = WP_LOGIND (plugin);
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int res = 0;
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if ((res = sd_login_monitor_new ("uid", &self->monitor)) < 0) {
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wp_transition_return_error (transition, g_error_new (G_IO_ERROR,
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g_io_error_from_errno (-res),
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"failed to start systemd logind monitor: %d (%s)",
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res, spa_strerror(res)));
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return;
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}
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if ((res = sd_uid_get_state (getuid(), &self->state)) < 0) {
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wp_transition_return_error (transition, g_error_new (G_IO_ERROR,
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g_io_error_from_errno (-res),
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"failed to get systemd login state: %d (%s)",
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res, spa_strerror(res)));
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g_clear_pointer (&self->monitor, sd_login_monitor_unref);
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return;
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}
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self->source = g_unix_fd_source_new (
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sd_login_monitor_get_fd (self->monitor),
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sd_login_monitor_get_events (self->monitor));
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g_source_set_callback (self->source, G_SOURCE_FUNC (wp_logind_source_ready),
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self, NULL);
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g_autoptr (WpCore) core = wp_object_get_core (WP_OBJECT (plugin));
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GMainContext *context = wp_core_get_g_main_context (core);
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g_source_attach (self->source, context);
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wp_object_update_features (WP_OBJECT (self), WP_PLUGIN_FEATURE_ENABLED, 0);
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}
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static void
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wp_logind_disable (WpPlugin * plugin)
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{
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WpLogind *self = WP_LOGIND (plugin);
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g_clear_pointer (&self->state, free);
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g_source_destroy (self->source);
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g_clear_pointer (&self->source, g_source_unref);
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g_clear_pointer (&self->monitor, sd_login_monitor_unref);
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}
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static void
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wp_logind_class_init (WpLogindClass * klass)
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{
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WpPluginClass *plugin_class = (WpPluginClass *) klass;
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plugin_class->enable = wp_logind_enable;
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plugin_class->disable = wp_logind_disable;
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signals[ACTION_GET_STATE] = g_signal_new_class_handler (
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"get-state", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
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(GCallback) wp_logind_get_state,
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NULL, NULL, NULL, G_TYPE_STRING, 0);
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signals[SIGNAL_STATE_CHANGED] = g_signal_new (
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"state-changed", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, 0, NULL, NULL, NULL, G_TYPE_NONE, 1, G_TYPE_STRING);
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}
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WP_PLUGIN_EXPORT GObject *
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wireplumber__module_init (WpCore * core, GVariant * args, GError ** error)
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{
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return G_OBJECT (g_object_new (wp_logind_get_type (),
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"name", NAME,
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"core", core,
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NULL));
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}
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