Changes in uspace/srv/loc/loc.c [cce8a83:763e0cd] in mainline

File:

• uspace/srv/loc/loc.c (modified) (7 diffs)

uspace/srv/loc/loc.c

@@ -84 +84 @@
 /** Service directory ogranized by categories (yellow pages) */
 static categ_dir_t cdir;
+
+static FIBRIL_MUTEX_INITIALIZE(callback_sess_mutex);
+static async_sess_t *callback_sess = NULL;
 
 service_id_t loc_create_id(void)
@@ -533 +536 @@
 }
 
+static void loc_category_get_name(ipc_callid_t iid, ipc_call_t *icall)
+{
+        ipc_callid_t callid;
+        size_t size;
+        size_t act_size;
+        category_t *cat;
+        
+        if (!async_data_read_receive(&callid, &size)) {
+                async_answer_0(callid, EREFUSED);
+                async_answer_0(iid, EREFUSED);
+                return;
+        }
+        
+        fibril_mutex_lock(&cdir.mutex);
+        
+        cat = category_get(&cdir, IPC_GET_ARG1(*icall));
+        if (cat == NULL) {
+                fibril_mutex_unlock(&cdir.mutex);
+                async_answer_0(callid, ENOENT);
+                async_answer_0(iid, ENOENT);
+                return;
+        }
+        
+        act_size = str_size(cat->name);
+        if (act_size > size) {
+                fibril_mutex_unlock(&cdir.mutex);
+                async_answer_0(callid, EOVERFLOW);
+                async_answer_0(iid, EOVERFLOW);
+                return;
+        }
+        
+        sysarg_t retval = async_data_read_finalize(callid, cat->name,
+            min(size, act_size));
+        
+        fibril_mutex_unlock(&cdir.mutex);
+        
+        async_answer_0(iid, retval);
+}
+
 static void loc_service_get_name(ipc_callid_t iid, ipc_call_t *icall)
 {
@@ -571 +613 @@
         async_answer_0(iid, retval);
 }
-
 
 /** Connect client to the service.
@@ -728 +769 @@
  *
  */
+static void loc_callback_create(ipc_callid_t iid, ipc_call_t *icall)
+{
+        async_sess_t *cb_sess = async_callback_receive(EXCHANGE_SERIALIZE);
+        if (cb_sess == NULL) {
+                async_answer_0(iid, ENOMEM);
+                return;
+        }
+        
+        fibril_mutex_lock(&callback_sess_mutex);
+        if (callback_sess != NULL) {
+                fibril_mutex_unlock(&callback_sess_mutex);
+                async_answer_0(iid, EEXIST);
+                return;
+        }
+        
+        callback_sess = cb_sess;
+        fibril_mutex_unlock(&callback_sess_mutex);
+        
+        async_answer_0(iid, EOK);
+}
+
+void loc_category_change_event(void)
+{
+        fibril_mutex_lock(&callback_sess_mutex);
+
+        if (callback_sess != NULL) {
+                async_exch_t *exch = async_exchange_begin(callback_sess);
+                async_msg_0(exch, LOC_EVENT_CAT_CHANGE);
+                async_exchange_end(exch);
+        }
+
+        fibril_mutex_unlock(&callback_sess_mutex);
+}
+
+/** Find ID for category specified by name.
+ *
+ * On success, answer will contain EOK int retval and service ID in arg1.
+ * On failure, error code will be sent in retval.
+ *
+ */
 static void loc_category_get_id(ipc_callid_t iid, ipc_call_t *icall)
 {
@@ -1129 +1210 @@
 
         async_answer_0(iid, retval);
+
+        loc_category_change_event();
 }
 
@@ -1156 +1239 @@
 
         cat = category_new("serial");
+        categ_dir_add_cat(&cdir, cat);
+
+        cat = category_new("usbhc");
         categ_dir_add_cat(&cdir, cat);
 
@@ -1244 +1330 @@
                         loc_namespace_get_id(callid, &call);
                         break;
+                case LOC_CALLBACK_CREATE:
+                        loc_callback_create(callid, &call);
+                        break;
                 case LOC_CATEGORY_GET_ID:
                         loc_category_get_id(callid, &call);
+                        break;
+                case LOC_CATEGORY_GET_NAME:
+                        loc_category_get_name(callid, &call);
                         break;
                 case LOC_CATEGORY_GET_SVCS: