git.maemo.org Git - cpumem-applet/blob - src/cpumem_status_area_item.c

   1 /*
   2  * Load applet - Maemo5 edition - status area plugin
   3  */
   4
   5
   6 #include <gtk/gtk.h>
   7 #include <hildon/hildon.h>
   8 #include <glib/gerror.h>
   9 #include <glib.h>
  10 #include <string.h>
  11 #include <libosso.h>
  12
  13 #include "la_status_area_item.h"
  14
  15 #define LA_ICON_WIDTH  16
  16 #define LA_ICON_HEIGHT 16
  17 #define LA_BOX_WIDTH   5
  18 #define LA_BOX_HEIGHT  3
  19 #define LA_CPU_MAX 5
  20
  21
  22
  23 #define LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE(obj) (G_TYPE_INSTANCE_GET_PRIVATE (obj, LOAD_APPLET_TYPE_STATUS_AREA_ITEM, LoadAppletStatusAreaItemPrivate))
  24
  25 struct _LoadAppletStatusAreaItemPrivate {
  26         guint timeout_id;
  27         gint lastU, lastN, lastIO, lastI;
  28         guchar last_mem_level;
  29         guchar last_cpu_level;
  30         GdkPixbuf *pixbuf;
  31         GdkPixbuf *pixbuf_on;
  32         GdkPixbuf *pixbuf_red;
  33         GdkPixbuf *pixbuf_off;
  34         osso_context_t *osso;
  35         gboolean red;
  36 };
  37
  38 HD_DEFINE_PLUGIN_MODULE (LoadAppletStatusAreaItem, load_applet_status_area_item, HD_TYPE_STATUS_PLUGIN_ITEM);
  39
  40
  41 /*
  42  * Read current MEM usage and return indicator between 5 and 1 - how many bars are "full"
  43  */
  44 static guchar
  45 la_check_mem (LoadAppletStatusAreaItemPrivate *priv)
  46 {
  47         #define MEMFILE "/proc/meminfo"
  48         #define MAX_READ_CHARS 128
  49         char read_buffer[MAX_READ_CHARS];
  50         FILE *fin;
  51         int mem_used = 0;
  52         int mem_total = 0;
  53         int mem_cached = 0;
  54         int mem_buffers = 0;
  55         int mem_free = 0;
  56
  57         //Open the memory info file and get current free memory
  58         fin = fopen(MEMFILE, "r");
  59         if (fin == NULL) {
  60                 g_warning("Can't open "MEMFILE"\n");
  61                 return TRUE;
  62         }
  63         while (fgets(read_buffer, MAX_READ_CHARS, fin) != NULL) {
  64                 if (strncmp(read_buffer, "MemTotal", 8) == 0) {
  65                         sscanf(read_buffer + 10, "%d", &mem_total);
  66                 } else if (strncmp(read_buffer, "MemFree", 6) == 0) {
  67                         sscanf(read_buffer + 9, "%d", &mem_free);
  68                 } else if (strncmp(read_buffer, "Buffers", 6) == 0) {
  69                         sscanf(read_buffer + 9, "%d", &mem_buffers);
  70                 } else if (strncmp(read_buffer, "Cached", 6) == 0) {
  71                         sscanf(read_buffer + 8, "%d", &mem_cached);
  72                         break;
  73                 }
  74         }
  75         fclose(fin);
  76
  77         mem_used = mem_total - mem_free - mem_buffers - mem_cached;
  78
  79         if (mem_used > 0.9*mem_total)
  80                 return 5;
  81         else if (mem_used > 0.7*mem_total)
  82                 return 4;
  83         else if (mem_used > 0.5*mem_total)
  84                 return 3;
  85         else if (mem_used > 0.3*mem_total)
  86                 return 2;
  87         else
  88                 return 1;
  89 }
  90
  91
  92 /*
  93  * Read current CPU usage and return indicator between 5 and 1 - how many bars are "full"
  94  */
  95 static guchar
  96 la_check_cpu (LoadAppletStatusAreaItemPrivate *priv)
  97 {
  98         #define CPUFILE "/proc/stat"
  99         gint curU, curN, curIO, curI;
 100         gint deltaU, deltaN, deltaIO, deltaI;
 101         int load, idle;
 102         GError *error = NULL;
 103         gchar *contents;
 104         gsize lenght;
 105         gchar **splits;
 106
 107         if (!g_file_get_contents (CPUFILE, &contents, &lenght, &error)) {
 108                 fprintf (stderr, "ERR: can't read file %s: %s\n", CPUFILE, error->message);
 109                 g_error_free (error);
 110                 return 0;
 111         }
 112
 113         splits = g_strsplit_set (contents, " ",  -1);
 114
 115         sscanf(splits[2], "%d", &curU);
 116         sscanf(splits[3], "%d", &curN);
 117         sscanf(splits[4], "%d", &curIO);
 118         sscanf(splits[5], "%d", &curI);
 119
 120         g_strfreev (splits);
 121         g_free (contents);
 122
 123         idle = (curI - priv->lastI);
 124         if (idle == 0) load = 100;
 125         else load = 100-idle;
 126         if (load>100) load = 0;
 127         deltaU = curU - priv->lastU;
 128         deltaN = curN - priv->lastN;
 129         deltaIO = curIO - priv->lastIO;
 130         deltaI = curI - priv->lastI;
 131         priv->lastU = curU;
 132         priv->lastN = curN;
 133         priv->lastIO = curIO;
 134         priv->lastI = curI;
 135
 136         if (load > 90)
 137                 return 5;
 138         else if (load > 70)
 139                 return 4;
 140         else if (load > 45)
 141                 return 3;
 142         else if (load > 19)
 143                 return 2;
 144         else
 145                 return 1;
 146 }
 147
 148
 149
 150 /*
 151  * Compose and blit the current status of memory bars
 152  */
 153 static void
 154 la_blit_memory_bars (const guchar level, LoadAppletStatusAreaItemPrivate *priv)
 155 {
 156         guint x, y;
 157
 158         gdk_pixbuf_fill(priv->pixbuf, 0x00000000);
 159
 160         x = 9;
 161         y = 1;
 162         if (level > 4)
 163                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 164         y = 5;
 165         if (level > 3)
 166                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 167         y = 9;
 168         if (level > 2)
 169                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 170         y = 13;
 171         if (level > 1)
 172                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 173         else
 174                 gdk_pixbuf_composite(priv->pixbuf_off, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 175 }
 176
 177
 178 /*
 179  * Compose and blit current status of CPU bars
 180  */
 181 static void
 182 la_blit_cpu_bars (const guchar level, LoadAppletStatusAreaItemPrivate *priv)
 183 {
 184         guint x, y;
 185
 186         x = 2;
 187         y = 1;
 188         if (level > 4)
 189         {
 190                 if (priv->red == TRUE) {
 191                         gdk_pixbuf_composite(priv->pixbuf_red, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 192                         priv->red = FALSE;
 193                 } else {
 194                         gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 195                         priv->red = TRUE;
 196                 }
 197         }
 198         y = 5;
 199         if (level > 3)
 200                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 201         y = 9;
 202         if (level > 2)
 203                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 204         y = 13;
 205         if (level > 1)
 206                 gdk_pixbuf_composite(priv->pixbuf_on, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 207         else
 208                 gdk_pixbuf_composite(priv->pixbuf_off, priv->pixbuf, x, y, LA_BOX_WIDTH, LA_BOX_HEIGHT, x, y, 1, 1, GDK_INTERP_NEAREST, 255);
 209 }
 210
 211
 212 /*
 213  * Ran to check and update the CPU and memory reading
 214  */
 215 static gboolean
 216 la_check_load (gpointer data)
 217 {
 218         guchar current_cpu_level;
 219         guchar current_mem_level;
 220         LoadAppletStatusAreaItem *item = (LoadAppletStatusAreaItem*)data;
 221         LoadAppletStatusAreaItemPrivate *priv = (LoadAppletStatusAreaItemPrivate*)item->priv;
 222
 223         current_cpu_level = la_check_cpu(priv);
 224         current_mem_level = la_check_mem(priv);
 225         //g_debug(g_strdup_printf("LOADAPLET - UPDATED CPU %d MEM %d", current_cpu_level, current_mem_level));
 226
 227         //Update and blit only if data changed!
 228         if ((current_mem_level != priv->last_mem_level) || (current_cpu_level != priv->last_cpu_level)) {
 229                 la_blit_memory_bars (current_mem_level, priv);
 230                 la_blit_cpu_bars (current_cpu_level, priv);
 231                 if (current_cpu_level == LA_CPU_MAX)
 232                         priv->red = FALSE;
 233                 hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(data), priv->pixbuf);
 234                 priv->last_mem_level = current_mem_level;
 235                 priv->last_cpu_level = current_cpu_level;
 236         } else if (current_cpu_level == LA_CPU_MAX) {
 237                 //Pulsate max CPU load icon also when CPU load stays at max
 238                 la_blit_cpu_bars (current_cpu_level, priv);
 239                 hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(data), priv->pixbuf);
 240         }
 241
 242         return TRUE;
 243 }
 244
 245 /*
 246  * Get callback when display state changes
 247  */
 248 static void
 249 load_applet_status_area_item_display_cb(osso_display_state_t state, gpointer user_data)
 250 {
 251         LoadAppletStatusAreaItem *item = LOAD_APPLET_STATUS_AREA_ITEM(user_data);
 252
 253         g_return_if_fail (item != NULL && item->priv != NULL);
 254
 255         if (state == OSSO_DISPLAY_ON)
 256     {
 257                 //Restart the updates, do one right away
 258                 if (item->priv->timeout_id == -1)
 259                 {
 260                         //g_debug("LOADAPPLET - restarting periodic updates");
 261                         item->priv->timeout_id = gtk_timeout_add(1000, la_check_load, item);
 262                 }
 263     } else {
 264                 //Suspend the updates - screen is off
 265                 //g_debug("LOADAPPLET - Turning updates off");
 266                 if (g_source_remove(item->priv->timeout_id) != TRUE)
 267                 {
 268                         //g_error("LOADAPPLET - couldn't stop the updates!the timer still running ...");
 269                 } else {
 270                         item->priv->timeout_id = -1;
 271                 }
 272         }
 273 }
 274
 275
 276 /*****************************************************************************
 277  *
 278  * Boilerplate code area - do not enter
 279  *
 280  *****************************************************************************/
 281
 282 static void
 283 load_applet_status_area_item_set_area_icon (LoadAppletStatusAreaItem *item)
 284 {
 285         item->priv = LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE (item);
 286
 287         hd_status_plugin_item_set_status_area_icon (HD_STATUS_PLUGIN_ITEM(item), item->priv->pixbuf);
 288 }
 289
 290
 291 static void
 292 load_applet_status_area_item_class_finalize (LoadAppletStatusAreaItemClass *klass)
 293 {
 294 }
 295
 296
 297
 298 static void
 299 load_applet_status_area_item_finalize (GObject *object)
 300 {
 301         LoadAppletStatusAreaItemPrivate *priv = LOAD_APPLET_STATUS_AREA_ITEM(object)->priv;
 302         // Release and clean our stuff
 303         G_OBJECT_CLASS (load_applet_status_area_item_parent_class)->finalize (object);
 304         if (priv->osso)
 305     {
 306                 osso_deinitialize(priv->osso);
 307                 priv->osso = NULL;
 308     }
 309
 310 }
 311
 312
 313
 314 static void
 315 load_applet_status_area_item_class_init (LoadAppletStatusAreaItemClass *klass)
 316 {
 317         GObjectClass *object_class = G_OBJECT_CLASS (klass);
 318
 319         object_class->finalize = load_applet_status_area_item_finalize;
 320
 321         g_type_class_add_private (klass, sizeof (LoadAppletStatusAreaItemPrivate));
 322
 323 }
 324
 325 static void
 326 load_applet_status_area_item_init (LoadAppletStatusAreaItem *item)
 327 {
 328         item->priv = LOAD_APPLET_STATUS_AREA_ITEM_GET_PRIVATE (item);
 329
 330         item->priv->last_mem_level = -1;
 331         item->priv->last_cpu_level = -1;
 332         item->priv->timeout_id = -1;
 333         item->priv->red = FALSE;
 334         item->priv->pixbuf = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_ICON_WIDTH, LA_ICON_HEIGHT);
 335         gdk_pixbuf_fill(item->priv->pixbuf, 0x00000000);
 336         item->priv->pixbuf_on = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
 337         gdk_pixbuf_fill(item->priv->pixbuf_on, 0xffffffff);
 338         item->priv->pixbuf_red = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
 339         gdk_pixbuf_fill(item->priv->pixbuf_red, 0xff0000ff);
 340         item->priv->pixbuf_off = gdk_pixbuf_new (GDK_COLORSPACE_RGB, TRUE, 8, LA_BOX_WIDTH, LA_BOX_HEIGHT);
 341         gdk_pixbuf_fill(item->priv->pixbuf_off, 0x777777ff);
 342         load_applet_status_area_item_set_area_icon(item);
 343
 344         item->priv->osso = osso_initialize ("cpumem_applet_status_area_item", "Maemo5", TRUE, NULL);
 345         item->priv->timeout_id = gtk_timeout_add(1000, la_check_load, item);
 346         osso_hw_set_display_event_cb (item->priv->osso, load_applet_status_area_item_display_cb, item);
 347 }
 348