[statusbar] Remove multi-threading code

Signed-off-by: Julien Danjou <julien@danjou.info>

Makefile.am

@@ -99,7 +99,7 @@ AM_CPPFLAGS = $(pangocairo_CFLAGS) $(AWESOME_CFLAGS) \
 	$(xcb_CFLAGS) $(xcb_event_CFLAGS) \
 	$(xcb_randr_CFLAGS) $(xcb_xinerama_CFLAGS) $(xcb_shape_CFLAGS) \
 	$(xcb_aux_CFLAGS) $(xcb_atom_CFLAGS) $(xcb_keysyms_CFLAGS) \
-	$(xcb_icccm_CFLAGS) $(dbus_CFLAGS) $(Lua_CFLAGS) $(gthread_CLFAGS)
+	$(xcb_icccm_CFLAGS) $(dbus_CFLAGS) $(Lua_CFLAGS)
 
 bin_PROGRAMS += awesome
 awesome_SOURCES = \
@@ -138,7 +138,7 @@ awesome_SOURCES += $(WIDGETS)
 awesome_LDADD = $(pangocairo_LIBS) $(xcb_LIBS) $(xcb_event_LIBS) \
 	$(xcb_randr_LIBS) $(xcb_xinerama_LIBS) $(xcb_shape_LIBS) $(xcb_aux_LIBS) \
 	$(xcb_atom_LIBS) $(xcb_keysyms_LIBS) $(xcb_icccm_LIBS) $(dbus_LIBS)\
-	$(imlib2_LIBS) $(GTK_LIBS) $(Lua_LIBS) $(gthread_LIBS)
+	$(imlib2_LIBS) $(GTK_LIBS) $(Lua_LIBS)
 
 bin_PROGRAMS += awesome-client
 awesome_client_SOURCES = \

awesome.c

@@ -53,6 +53,7 @@
 #include "ewmh.h"
 #include "tag.h"
 #include "dbus.h"
+#include "statusbar.h"
 #include "common/socket.h"
 #include "common/version.h"
 #include "common/configopts.h"
@@ -332,9 +333,6 @@ main(int argc, char **argv)
     /* Text won't be printed correctly otherwise */
     setlocale(LC_CTYPE, "");
 
-    /* initialize Glib for thread safeness */
-    g_thread_init(NULL);
-
     /* X stuff */
     globalconf.connection = xcb_connect(NULL, &globalconf.default_screen);
     if(xcb_connection_has_error(globalconf.connection))
@@ -479,6 +477,7 @@ main(int argc, char **argv)
 
     /* refresh everything before waiting events */
     layout_refresh();
+    statusbar_refresh();
 
     /* main event loop */
     while(running)
@@ -540,11 +539,13 @@ main(int argc, char **argv)
             } while((ev = xcb_poll_for_event(globalconf.connection)));
 
             layout_refresh();
+            statusbar_refresh();
 
             /* need to resync */
             xcb_aux_sync(globalconf.connection);
         }
         layout_refresh();
+        statusbar_refresh();
         xcb_aux_sync(globalconf.connection);
 
         if(tv && lastrun + globalconf.stimeout <= time(NULL))

configure.ac

@@ -123,8 +123,6 @@ PKG_CHECK_MODULES([Lua], [lua >= 5.1],,
                       [AC_MSG_ERROR([awesome requires Lua >= 5.1.])])])
 PKG_CHECK_MODULES([glib], [glib-2.0],,
    [AC_MSG_ERROR([awesome requires glib-2.0.])])
-PKG_CHECK_MODULES([gthread], [gthread-2.0],,
-   [AC_MSG_ERROR([awesome requires gthread-2.0.])])
 
 AC_ARG_WITH([dbus], AS_HELP_STRING([--with-dbus], [Build with D-BUS (default: enabled)]), [], [with_dbus=yes])
 if test "x$with_dbus" == "xyes"; then
@@ -165,7 +163,6 @@ PKG_CHECK_MODULES([xcb_icccm], [xcb-icccm],,
    [AC_MSG_ERROR([awesome requires xcb-icccm.])])
 PKG_CHECK_MODULES([cairo_xcb], [cairo-xcb],,
    [AC_MSG_ERROR([awesome requires cairo-xcb.])])
-AC_CHECK_LIB(pthread, pthread_create)
 AC_CHECK_LIB(readline, readline,
              [AC_SUBST([readline_LIBS], ["-lreadline -lncurses"])],
              [AC_MSG_FAILURE([awesome needs readline])], -lncurses)

statusbar.c

@@ -22,8 +22,6 @@
 #include <stdio.h>
 #include <math.h>
 
-#include <pthread.h>
-
 #include <xcb/xcb.h>
 #include <xcb/xcb_aux.h>
 
@@ -53,7 +51,7 @@ statusbar_draw(statusbar_t *statusbar)
     xcb_atom_t rootpix_atom, pixmap_atom;
     xutil_intern_atom_request_t rootpix_atom_req, pixmap_atom_req;
 
-    statusbar->need_update.value = false;
+    statusbar->need_update = false;
 
     if(!statusbar->position)
         return;
@@ -154,27 +152,20 @@ statusbar_draw(statusbar_t *statusbar)
     xcb_aux_sync(globalconf.connection);
 }
 
-/** Statusbar thread main function.
+/** Statusbar refresh function.
  * \param p A pointer to a statusbar_t.
  * \return Return NULL.
  */
-static void *
-statusbar_refresh(void *p)
+void
+statusbar_refresh(void)
 {
-    statusbar_t *statusbar = (statusbar_t *) p;
-
-    while(running)
-    {
-        pthread_mutex_lock(&statusbar->need_update.lock);
-
-        while(!statusbar->need_update.value)
-            pthread_cond_wait(&statusbar->need_update.cond, &statusbar->need_update.lock);
+    int screen;
+    statusbar_t *statusbar;
 
+    for(screen = 0; screen < globalconf.screens_info->nscreen; screen++)
+        for(statusbar = globalconf.screens[screen].statusbar; statusbar; statusbar = statusbar->next)
+            if(statusbar->need_update)
                 statusbar_draw(statusbar);
-        pthread_mutex_unlock(&statusbar->need_update.lock);
-    }
-
-    return NULL;
 }
 
 /** Update the statusbar position. It deletes every statusbar resources and
@@ -193,18 +184,11 @@ statusbar_position_update(statusbar_t *statusbar, position_t position)
 
     globalconf.screens[statusbar->screen].need_arrange = true;
 
-    /* Lock the update thread.
-     * We will reinit every stuff so, it better do nothing at this moment. */
-    pthread_mutex_lock(&statusbar->need_update.lock);
-
     simplewindow_delete(&statusbar->sw);
     draw_context_delete(&statusbar->ctx);
 
     if((statusbar->position = position) == Off)
-    {
-        pthread_mutex_unlock(&statusbar->need_update.lock);
         return;
-    }
 
     area = screen_get_area(statusbar->screen,
                            NULL,
@@ -383,22 +367,8 @@ statusbar_position_update(statusbar_t *statusbar, position_t position)
 
     xcb_map_window(globalconf.connection, statusbar->sw->window);
 
-    /* Set need update, and release everything out! */
-    statusbar->need_update.value = true;
-    pthread_mutex_unlock(&statusbar->need_update.lock);
-    pthread_cond_broadcast(&statusbar->need_update.cond);
-}
-
-/** Update the need_update attribute of a statusbar to true.
- * \param statusbar The statusbar to flag.
- */
-void
-statusbar_needupdate(statusbar_t *statusbar)
-{
-    pthread_mutex_lock(&statusbar->need_update.lock);
-    statusbar->need_update.value = true;
-    pthread_mutex_unlock(&statusbar->need_update.lock);
-    pthread_cond_broadcast(&statusbar->need_update.cond);
+    /* Set need update */
+    statusbar->need_update = true;
 }
 
 /** Check for statusbar equality.
@@ -481,7 +451,7 @@ luaA_statusbar_widget_add(lua_State *L)
     widget_t **widget = luaL_checkudata(L, 2, "widget");
     widget_node_t *w = p_new(widget_node_t, 1);
 
-    statusbar_needupdate(*sb);
+    (*sb)->need_update = true;
     w->widget = *widget;
     widget_node_list_append(&(*sb)->widgets, w);
     widget_ref(widget);
@@ -515,11 +485,6 @@ luaA_statusbar_add(lua_State *L)
     (*sb)->screen = screen;
     (*sb)->phys_screen = screen_virttophys(screen);
 
-    /* Initialize thread stuffs before any position update, since it will
-     * set a need_update and so lock */
-    pthread_cond_init(&(*sb)->need_update.cond, NULL);
-    pthread_mutex_init(&(*sb)->need_update.lock, NULL);
-
     statusbar_list_append(&globalconf.screens[screen].statusbar, *sb);
     statusbar_ref(sb);
 
@@ -527,10 +492,6 @@ luaA_statusbar_add(lua_State *L)
     for(s = globalconf.screens[screen].statusbar; s; s = s->next)
         statusbar_position_update(s, s->position);
 
-    /* Start the thread */
-    if(pthread_create(&(*sb)->tid, NULL, statusbar_refresh, *sb))
-        perror("unable to create thread");
-
     return 0;
 }
 

statusbar.h

@@ -35,7 +35,7 @@ statusbar_delete(statusbar_t **statusbar)
     p_delete(statusbar);
 }
 
-void statusbar_needupdate(statusbar_t *);
+void statusbar_refresh(void);
 
 DO_RCNT(statusbar_t, statusbar, statusbar_delete)
 DO_SLIST(statusbar_t, statusbar, statusbar_delete)

structs.h

@@ -215,14 +215,7 @@ struct statusbar_t
     /** Draw context */
     draw_context_t *ctx;
     /** Need update */
-    struct
-    {
-        bool value;
-        pthread_mutex_t lock;
-        pthread_cond_t cond;
-    } need_update;
-    /** Thread id */
-    pthread_t tid;
+    bool need_update;
     /** Default colors */
     struct
     {

widget.c

@@ -129,7 +129,7 @@ widget_invalidate_cache(int screen, int flags)
         for(widget = statusbar->widgets; widget; widget = widget->next)
             if(widget->widget->cache_flags & flags)
             {
-                statusbar_needupdate(statusbar);
+                statusbar->need_update = true;
                 break;
             }
 }
@@ -151,7 +151,7 @@ widget_invalidate_statusbar_bywidget(widget_t *widget)
             for(witer = statusbar->widgets; witer; witer = witer->next)
                 if(witer->widget == widget)
                 {
-                    statusbar_needupdate(statusbar);
+                    statusbar->need_update = true;
                     break;
                 }
 }