bt-oal/common/oal-event-dispatcher.c

   1 /*
   2  * bluetooth-frwk
   3  *
   4  * Copyright (c) 2012-2013 Samsung Electronics Co., Ltd.
   5  *
   6  * Licensed under the Apache License, Version 2.0 (the "License");
   7  * you may not use this file except in compliance with the License.
   8  * You may obtain a copy of the License at
   9  *
  10  *              http://www.apache.org/licenses/LICENSE-2.0
  11  *
  12  * Unless required by applicable law or agreed to in writing, software
  13  * distributed under the License is distributed on an "AS IS" BASIS,
  14  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  15  * See the License for the specific language governing permissions and
  16  * limitations under the License.
  17  *
  18  */
  19 #define _OAL_EVENT_DISPATCHER_C_
  20
  21 #include <stdio.h>
  22 #include <glib.h>
  23 #include <dlog.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26
  27 #include "oal-hardware.h"
  28 #include "oal-event.h"
  29 #include "oal-utils.h"
  30 #include "oal-manager.h"
  31
  32 #define EVENT_TRACE(fmt, args...) {LOG_(LOG_ID_SYSTEM, DLOG_INFO, "OAL_EVENT", GREEN(fmt), ##args); \
  33         LOG_(LOG_ID_MAIN, DLOG_INFO, LOG_TAG, GREEN("[OAL_EVENT]"fmt), ##args); }
  34
  35 typedef struct {
  36         int event;
  37         gsize size;
  38         gpointer event_data;
  39 } event_t;
  40
  41 static GMainContext *event_thread_context;
  42 static oal_event_callback event_handler_cb;
  43 GMainLoop *event_loop;
  44
  45 void _bt_event_dispatcher_deinit()
  46 {
  47         BT_DBG("+");
  48         if (event_loop) {
  49                 BT_DBG("OAL event loop guit");
  50                 g_main_loop_quit(event_loop);
  51         }
  52
  53         BT_DBG("-");
  54 }
  55
  56 static gpointer __event_handler_loop(gpointer user_data)
  57 {
  58         gboolean ret = FALSE;
  59
  60         /* Set up the thread�s context and run it forever. */
  61         g_main_context_push_thread_default(event_thread_context);
  62
  63         event_loop = g_main_loop_new(event_thread_context, FALSE);
  64         do {
  65                 ret = oal_lib_init(NULL);
  66                 if (ret == FALSE)
  67                         BT_WARN("oal_lib_init failed, trying again...");
  68         } while (ret == FALSE);
  69
  70         g_main_loop_run(event_loop);
  71         BT_DBG("OAL event loop quited");
  72
  73         if (event_loop) {
  74                 g_main_loop_unref(event_loop);
  75                 event_loop = NULL;
  76         }
  77
  78         g_main_context_pop_thread_default(event_thread_context);
  79         g_main_context_unref(event_thread_context);
  80
  81         return NULL;
  82 }
  83
  84 static void event_data_free(event_t *event_info)
  85 {
  86         if (event_info->event_data)
  87                 g_free(event_info->event_data);
  88         g_slice_free(event_t, event_info);
  89 }
  90
  91 /* Convert an idle callback into a call to dispatch_idle(). */
  92 static gboolean dispatch_idle(gpointer user_data)
  93 {
  94         event_t *event_info = user_data;
  95
  96         if (NULL == event_handler_cb)
  97                 BT_ERR("Upstream handler not registered");
  98         else
  99                 (*event_handler_cb)(event_info->event, event_info->event_data, event_info->size);
 100
 101         return G_SOURCE_REMOVE;
 102 }
 103
 104 static gboolean need_same_context(oal_event_t event)
 105 {
 106         gboolean ret;
 107
 108         switch (event) {
 109         default:
 110                 ret = FALSE;
 111                 break;
 112         }
 113         return ret;
 114 }
 115
 116 void _bt_event_dispatcher_init(oal_event_callback cb)
 117 {
 118         event_handler_cb = cb;
 119         BT_DBG("+");
 120         /* Spawn a background thread and pass it a reference to its
 121          * GMainContext. Retain a reference for use in this thread
 122          * too. */
 123         event_thread_context = g_main_context_new();
 124         g_thread_new("OALEventScheduler", __event_handler_loop, NULL);
 125 }
 126
 127 void send_event_no_trace(oal_event_t event, gpointer event_data, gsize len)
 128 {
 129         event_t *event_info;
 130
 131         /* Create a data closure to pass all the desired variables
 132          * between threads. */
 133         event_info = g_slice_new0(event_t);
 134         event_info->event = event;
 135         event_info->size = len;
 136         event_info->event_data = event_data;
 137         /* Invoke the function. */
 138
 139         if (need_same_context(event)) {
 140                 BT_INFO("Without context change");
 141                 dispatch_idle(event_info);
 142                 event_data_free(event_info);
 143         } else
 144                 g_main_context_invoke_full(event_thread_context,
 145                                 G_PRIORITY_DEFAULT, dispatch_idle,
 146                                 event_info,
 147                                 (GDestroyNotify) event_data_free);
 148 }
 149
 150 void send_event_bda_trace(oal_event_t event, gpointer event_data, gsize len, bt_address_t *address)
 151 {
 152         if (event != OAL_EVENT_BLE_REMOTE_DEVICE_FOUND) {
 153                 if (address) {
 154                         bdstr_t bdstr;
 155                         EVENT_TRACE("[%s] %s", bdt_bd2str(address, &bdstr) + 12, str_event[event]);
 156                 } else
 157                         EVENT_TRACE(" %s", str_event[event]);
 158         }
 159         send_event_no_trace(event, event_data, len);
 160 }
 161
 162 void send_event(oal_event_t event, gpointer event_data, gsize len)
 163 {
 164         send_event_bda_trace(event, event_data, len, NULL);
 165 }
 166 #undef _OAL_EVENT_DISPATCHER_C_