Changeset b5674b2 in mainline

Timestamp:

2014-05-16T23:35:02Z (10 years ago)

Author:

Martin Decky <martin@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

527f1ca

Parents:

1e94e09

Message:

cycle periodically the color of connected LED devices in vlaunch
(this can be used as a poor man's debugging tool to detect if the user space is still alive)

File:

• uspace/app/vlaunch/vlaunch.c (modified) (6 diffs)

uspace/app/vlaunch/vlaunch.c

@@ -41 +41 @@
 #include <str.h>
 #include <str_error.h>
+#include <loc.h>
+#include <fibril_synch.h>
+#include <io/pixel.h>
+#include <device/led_dev.h>
 
 #include <window.h>
@@ -60 +64 @@
 #define LOGO_HEIGHT  66
 
+#define PERIOD  1000000
+#define COLORS  7
+
 static char *winreg = NULL;
+static fibril_timer_t *timer = NULL;
+static list_t led_devs;
+
+static pixel_t colors[COLORS] = {
+        PIXEL(0xff, 0xff, 0x00, 0x00),
+        PIXEL(0xff, 0x00, 0xff, 0x00),
+        PIXEL(0xff, 0x00, 0x00, 0xff),
+        PIXEL(0xff, 0xff, 0xff, 0x00),
+        PIXEL(0xff, 0xff, 0x00, 0xff),
+        PIXEL(0xff, 0x00, 0xff, 0xff),
+        PIXEL(0xff, 0xff, 0xff, 0xff)
+};
+
+static unsigned int color = 0;
+
+typedef struct {
+        link_t link;
+        service_id_t svc_id;
+        async_sess_t *sess;
+} led_dev_t;
 
 static int app_launch(const char *app)
 {
-        int rc;
         printf("%s: Spawning %s %s \n", NAME, app, winreg);
-
+        
         task_id_t id;
-        task_exit_t texit;
-        int retval;
-        rc = task_spawnl(&id, app, app, winreg, NULL);
+        int rc = task_spawnl(&id, app, app, winreg, NULL);
         if (rc != EOK) {
                 printf("%s: Error spawning %s %s (%s)\n", NAME, app,
@@ -76 +100 @@
                 return -1;
         }
+        
+        task_exit_t texit;
+        int retval;
         rc = task_wait(id, &texit, &retval);
-        if (rc != EOK || texit != TASK_EXIT_NORMAL) {
+        if ((rc != EOK) || (texit != TASK_EXIT_NORMAL)) {
                 printf("%s: Error retrieving retval from %s (%s)\n", NAME,
                     app, str_error(rc));
                 return -1;
         }
-
+        
         return retval;
 }
@@ -99 +126 @@
 {
         app_launch("/app/vlaunch");
+}
+
+static void timer_callback(void *data)
+{
+        pixel_t next_color = colors[color];
+        
+        color++;
+        if (color >= COLORS)
+                color = 0;
+        
+        list_foreach(led_devs, link, led_dev_t, dev) {
+                if (dev->sess)
+                        led_dev_color_set(dev->sess, next_color);
+        }
+        
+        fibril_timer_set(timer, PERIOD, timer_callback, NULL);
+}
+
+static void loc_callback(void)
+{
+        category_id_t led_cat;
+        int rc = loc_category_get_id("led", &led_cat, IPC_FLAG_BLOCKING);
+        if (rc != EOK)
+                return;
+        
+        service_id_t *svcs;
+        size_t count;
+        rc = loc_category_get_svcs(led_cat, &svcs, &count);
+        if (rc != EOK)
+                return;
+        
+        for (size_t i = 0; i < count; i++) {
+                bool known = false;
+                
+                /* Determine whether we already know this device. */
+                list_foreach(led_devs, link, led_dev_t, dev) {
+                        if (dev->svc_id == svcs[i]) {
+                                known = true;
+                                break;
+                        }
+                }
+                
+                if (!known) {
+                        led_dev_t *dev = (led_dev_t *) calloc(1, sizeof(led_dev_t));
+                        if (!dev)
+                                continue;
+                        
+                        link_initialize(&dev->link);
+                        dev->svc_id = svcs[i];
+                        dev->sess = loc_service_connect(EXCHANGE_SERIALIZE, svcs[i], 0);
+                        
+                        list_append(&dev->link, &led_devs);
+                }
+        }
+        
+        // FIXME: Handle LED device removal
+        
+        free(svcs);
 }
 
@@ -105 +190 @@
         if (argc < 2) {
                 printf("Compositor server not specified.\n");
+                return 1;
+        }
+        
+        list_initialize(&led_devs);
+        int rc = loc_register_cat_change_cb(loc_callback);
+        if (rc != EOK) {
+                printf("Unable to register callback for device discovery.\n");
+                return 1;
+        }
+        
+        timer = fibril_timer_create();
+        if (!timer) {
+                printf("Unable to create timer.\n");
                 return 1;
         }
@@ -163 +261 @@
         window_exec(main_window);
         
+        fibril_timer_set(timer, PERIOD, timer_callback, NULL);
+        
         task_retval(0);
         async_manager();