Added a plug-in to monitor the swap status

Makefile

@@ -43,6 +43,7 @@ dist:
 		$(PACKAGE)-$(VERSION)/src/applets/main.c \
 		$(PACKAGE)-$(VERSION)/src/applets/memory.c \
 		$(PACKAGE)-$(VERSION)/src/applets/pager.c \
+		$(PACKAGE)-$(VERSION)/src/applets/swap.c \
 		$(PACKAGE)-$(VERSION)/src/applets/systray.c \
 		$(PACKAGE)-$(VERSION)/src/applets/tasks.c \
 		$(PACKAGE)-$(VERSION)/src/applets/volume.c \

src/applets/Makefile

@@ -1,4 +1,4 @@
-TARGETS	= battery.so bluetooth.so clock.so cpu.so cpufreq.so desktop.so gps.so gsm.so lock.so logout.so main.so memory.so pager.so systray.so tasks.so volume.so
+TARGETS	= battery.so bluetooth.so clock.so cpu.so cpufreq.so desktop.so gps.so gsm.so lock.so logout.so main.so memory.so pager.so swap.so systray.so tasks.so volume.so
 PREFIX	= /usr/local
 DESTDIR	= 
 LIBDIR	= $(PREFIX)/lib
@@ -109,6 +109,13 @@ pager_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
 pager.so: $(pager_OBJS)
 	$(LD) -o pager.so $(pager_OBJS)
 
+swap_OBJS = swap.o
+swap_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
+swap_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
+
+swap.so: $(swap_OBJS)
+	$(LD) -o swap.so $(swap_OBJS)
+
 systray_OBJS = systray.o
 systray_CFLAGS = $(CPPFLAGSF) $(CPPFLAGS) $(CFLAGSF) $(CFLAGS)
 systray_LDFLAGS = $(LDFLAGSF) $(LDFLAGS)
@@ -169,6 +176,9 @@ memory.o: memory.c ../../include/Panel.h
 pager.o: pager.c ../../include/Panel.h
 	$(CC) $(pager_CFLAGS) -c pager.c
 
+swap.o: swap.c ../../include/Panel.h
+	$(CC) $(swap_CFLAGS) -c swap.c
+
 systray.o: systray.c ../../include/Panel.h
 	$(CC) $(systray_CFLAGS) -c systray.c
 
@@ -179,7 +189,7 @@ volume.o: volume.c ../../include/Panel.h
 	$(CC) $(volume_CFLAGS) -c volume.c
 
 clean:
-	$(RM) $(battery_OBJS) $(bluetooth_OBJS) $(clock_OBJS) $(cpu_OBJS) $(cpufreq_OBJS) $(desktop_OBJS) $(gps_OBJS) $(gsm_OBJS) $(lock_OBJS) $(logout_OBJS) $(main_OBJS) $(memory_OBJS) $(pager_OBJS) $(systray_OBJS) $(tasks_OBJS) $(volume_OBJS)
+	$(RM) $(battery_OBJS) $(bluetooth_OBJS) $(clock_OBJS) $(cpu_OBJS) $(cpufreq_OBJS) $(desktop_OBJS) $(gps_OBJS) $(gsm_OBJS) $(lock_OBJS) $(logout_OBJS) $(main_OBJS) $(memory_OBJS) $(pager_OBJS) $(swap_OBJS) $(systray_OBJS) $(tasks_OBJS) $(volume_OBJS)
 
 distclean: clean
 	$(RM) $(TARGETS)
@@ -212,6 +222,8 @@ install: all
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/Panel/applets
 	$(INSTALL) -m 0644 pager.so $(DESTDIR)$(LIBDIR)/Panel/applets/pager.so
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/Panel/applets
+	$(INSTALL) -m 0644 swap.so $(DESTDIR)$(LIBDIR)/Panel/applets/swap.so
+	$(MKDIR) $(DESTDIR)$(LIBDIR)/Panel/applets
 	$(INSTALL) -m 0644 systray.so $(DESTDIR)$(LIBDIR)/Panel/applets/systray.so
 	$(MKDIR) $(DESTDIR)$(LIBDIR)/Panel/applets
 	$(INSTALL) -m 0644 tasks.so $(DESTDIR)$(LIBDIR)/Panel/applets/tasks.so
@@ -232,6 +244,7 @@ uninstall:
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/main.so
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/memory.so
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/pager.so
+	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/swap.so
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/systray.so
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/tasks.so
 	$(RM) $(DESTDIR)$(LIBDIR)/Panel/applets/volume.so

src/applets/project.conf

@@ -1,4 +1,4 @@
-targets=battery,bluetooth,clock,cpu,cpufreq,desktop,gps,gsm,lock,logout,main,memory,pager,systray,tasks,volume
+targets=battery,bluetooth,clock,cpu,cpufreq,desktop,gps,gsm,lock,logout,main,memory,pager,swap,systray,tasks,volume
 cppflags_force=-I $(PREFIX)/include -I ../../include
 #cppflags=-D EMBEDDED
 cflags_force=-W `pkg-config --cflags gtk+-2.0` -fPIC
@@ -110,6 +110,14 @@ install=$(LIBDIR)/Panel/applets
 [pager.c]
 depends=../../include/Panel.h
 
+[swap]
+type=plugin
+sources=swap.c
+install=$(LIBDIR)/Panel/applets
+
+[swap.c]
+depends=../../include/Panel.h
+
 [systray]
 type=plugin
 sources=systray.c

src/applets/swap.c

@@ -0,0 +1,148 @@
+/* $Id$ */
+/* Copyright (c) 2010 Pierre Pronchery <khorben@defora.org> */
+/* This file is part of DeforaOS Desktop Panel */
+/* 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, version 3 of the License.
+ *
+ * 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.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>. */
+
+
+
+#include <sys/time.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#if defined(__linux__)
+# include <sys/sysinfo.h>
+#elif defined(__NetBSD__)
+# include <sys/sysctl.h>
+#endif
+#include "Panel.h"
+
+
+/* Swap */
+/* private */
+/* types */
+typedef struct _Swap
+{
+	PanelAppletHelper * helper;
+	GtkWidget * scale;
+	guint timeout;
+} Swap;
+
+
+/* prototypes */
+static GtkWidget * _swap_init(PanelApplet * applet);
+static void _swap_destroy(PanelApplet * applet);
+
+/* callbacks */
+#if defined(__linux__) || defined(__NetBSD__)
+static gboolean _on_timeout(gpointer data);
+#endif
+
+
+/* public */
+/* variables */
+PanelApplet applet =
+{
+	NULL,
+	_swap_init,
+	_swap_destroy,
+	PANEL_APPLET_POSITION_END,
+	FALSE,
+	TRUE,
+	NULL
+};
+
+
+/* private */
+/* functions */
+/* swap_init */
+static GtkWidget * _swap_init(PanelApplet * applet)
+{
+#if defined(__linux__) || defined(__NetBSD__)
+	GtkWidget * ret;
+	Swap * swap;
+	PangoFontDescription * desc;
+	GtkWidget * widget;
+
+	if((swap = malloc(sizeof(*swap))) == NULL)
+	{
+		applet->helper->error(applet->helper->priv, "malloc", 0);
+		return NULL;
+	}
+	applet->priv = swap;
+	swap->helper = applet->helper;
+	ret = gtk_hbox_new(FALSE, 0);
+	desc = pango_font_description_new();
+	pango_font_description_set_weight(desc, PANGO_WEIGHT_BOLD);
+	widget = gtk_label_new("Swap:");
+	gtk_widget_modify_font(widget, desc);
+	gtk_box_pack_start(GTK_BOX(ret), widget, FALSE, FALSE, 0);
+	swap->scale = gtk_vscale_new_with_range(0, 100, 1);
+	gtk_widget_set_sensitive(swap->scale, FALSE);
+	gtk_range_set_inverted(GTK_RANGE(swap->scale), TRUE);
+	gtk_scale_set_value_pos(GTK_SCALE(swap->scale), GTK_POS_RIGHT);
+	gtk_box_pack_start(GTK_BOX(ret), swap->scale, FALSE, FALSE, 0);
+	swap->timeout = g_timeout_add(5000, _on_timeout, swap);
+	_on_timeout(swap);
+	pango_font_description_free(desc);
+	gtk_widget_show_all(ret);
+	return ret;
+#else
+	error_set("%s", "swap: Unsupported platform");
+	return NULL;
+#endif
+}
+
+
+/* swap_destroy */
+static void _swap_destroy(PanelApplet * applet)
+{
+	Swap * swap = applet->priv;
+
+	g_source_remove(swap->timeout);
+	free(swap);
+}
+
+
+/* callbacks */
+/* on_timeout */
+#if defined(__linux__)
+static gboolean _on_timeout(gpointer data)
+{
+	Swap * swap = data;
+	struct sysinfo sy;
+	gdouble value;
+
+	if(sysinfo(&sy) != 0)
+		return swap->helper->error(swap->helper->priv, "sysinfo", TRUE);
+	if((value = sy.totalswap - sy.freeswap) != 0.0 && sy.totalswap != 0)
+		value /= sy.totalswap;
+	gtk_range_set_value(GTK_RANGE(swap->scale), value);
+	return TRUE;
+}
+#elif defined(__NetBSD__)
+static gboolean _on_timeout(gpointer data)
+{
+	Swap * swap = data;
+	int mib[] = { CTL_VM, VM_UVMEXP };
+	struct uvmexp ue;
+	size_t size = sizeof(ue);
+	gdouble value;
+
+	if(sysctl(mib, 2, &ue, &size, NULL, 0) < 0)
+		return TRUE;
+	if((value = ue.swpgonly) != 0.0 && ue.swpages != 0)
+		value /= ue.swpages;
+	gtk_range_set_value(GTK_RANGE(swap->scale), value);
+	return TRUE;
+}
+#endif

src/panel.c

@@ -147,8 +147,8 @@ static gboolean _on_idle(gpointer data)
 	/* FIXME load all plugins, a configuration file or ask the user */
 #ifndef EMBEDDED
 	const char * plugins[] = { "volume", "systray", "battery", "bluetooth",
-		"clock", "memory", "cpufreq", "cpu", "desktop", "gps", "gsm",
+		"clock", "swap", "memory", "cpufreq", "cpu", "desktop", "gps",
-		"lock", "logout", "main", "pager", "tasks", NULL };
+		"gsm", "lock", "logout", "main", "pager", "tasks", NULL };
 #else
 	const char * plugins[] = { "volume", "systray", "battery", "bluetooth",
 		"clock", "cpufreq", "gps", "gsm", "main", "pager", "tasks",