src/common/media-info-util.c

   1 /*
   2  * libmedia-service
   3  *
   4  * Copyright (c) 2000 - 2011 Samsung Electronics Co., Ltd. All rights reserved.
   5  *
   6  * Contact: Hyunjun Ko <zzoon.ko@samsung.com>, Haejeong Kim <backto.kim@samsung.com>
   7  *
   8  * Licensed under the Apache License, Version 2.0 (the "License");
   9  * you may not use this file except in compliance with the License.
  10  * You may obtain a copy of the License at
  11  *
  12  * http://www.apache.org/licenses/LICENSE-2.0
  13  *
  14  * Unless required by applicable law or agreed to in writing, software
  15  * distributed under the License is distributed on an "AS IS" BASIS,
  16  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  17  * See the License for the specific language governing permissions and
  18  * limitations under the License.
  19  *
  20  */
  21
  22 #include <unistd.h>
  23 #include <asm/unistd.h>
  24 #include <pthread.h>
  25 #include <string.h>
  26
  27 #include "media-info-util.h"
  28 #include "media-info-error.h"
  29 #include "media-info-debug.h"
  30 #include "media-svc.h"
  31 #include "audio-svc.h"
  32 #include "audio-svc-error.h"
  33 #include "uuid.h"
  34
  35 static GHashTable *g_handle_table = NULL;
  36 pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER;
  37
  38 int _media_info_get_thread_id()
  39 {
  40         return syscall(__NR_gettid);
  41 }
  42
  43 int _media_info_init_handle_tbl()
  44 {
  45         pthread_mutex_lock(&mutex);
  46
  47         if (g_handle_table == NULL)
  48                 g_handle_table = g_hash_table_new(g_int_hash, g_int_equal);
  49
  50         pthread_mutex_unlock(&mutex);
  51
  52         if (g_handle_table == NULL)
  53                 return -1;
  54         else
  55                 return 0;
  56 }
  57
  58 int _media_info_finalize_handle_tbl()
  59 {
  60         pthread_mutex_lock(&mutex);
  61
  62         if (g_handle_table != NULL) {
  63                 int size = g_hash_table_size(g_handle_table);
  64                 if (size == 0) {
  65                         g_hash_table_destroy(g_handle_table);
  66                         g_handle_table = NULL;
  67                 } else
  68                         mediainfo_dbg("handle table is not empty");
  69         }
  70
  71         pthread_mutex_unlock(&mutex);
  72
  73         return 0;
  74 }
  75
  76 int
  77 _media_info_insert_handle(int **tid_key, int tid, HandleTable ** handle_table)
  78 {
  79         *tid_key = g_malloc(sizeof **tid_key);
  80         **tid_key = tid;
  81         *handle_table = g_malloc(sizeof **handle_table);
  82
  83         pthread_mutex_lock(&mutex);
  84
  85         g_hash_table_insert(g_handle_table, (gpointer) * tid_key,
  86                             (gpointer) * handle_table);
  87
  88         (*handle_table)->ref_cnt = 1;
  89
  90         pthread_mutex_unlock(&mutex);
  91
  92         return 0;
  93 }
  94
  95 int _media_info_remove_handle(int tid)
  96 {
  97         int *key = NULL;
  98         HandleTable *val = NULL;
  99
 100         pthread_mutex_lock(&mutex);
 101
 102         if (!g_hash_table_lookup_extended
 103             (g_handle_table, &tid, (gpointer) & key, (gpointer) & val)) {
 104                 pthread_mutex_unlock(&mutex);
 105                 return -1;
 106         } else {
 107                 if (g_hash_table_remove(g_handle_table, (gpointer) & tid))
 108                         mediainfo_dbg("g_hash_table_remove done");
 109                 else
 110                         mediainfo_dbg("g_hash_table_remove fails");
 111
 112                 if (key)
 113                         g_free(key);
 114                 if (val)
 115                         g_free(val);
 116
 117                 pthread_mutex_unlock(&mutex);
 118                 return 0;
 119         }
 120 }
 121
 122 HandleTable *_media_info_search_handle(int tid)
 123 {
 124         pthread_mutex_lock(&mutex);
 125
 126         HandleTable *value =
 127             (HandleTable *) g_hash_table_lookup(g_handle_table,
 128                                                 (gpointer) & tid);
 129
 130         pthread_mutex_unlock(&mutex);
 131
 132         return value;
 133 }
 134
 135 sqlite3 *_media_info_get_proper_handle()
 136 {
 137         int tid = _media_info_get_thread_id();
 138         HandleTable *value =
 139             (HandleTable *) g_hash_table_lookup(g_handle_table,
 140                                                 (gpointer) & tid);
 141
 142         if (value == NULL) {
 143                 return NULL;
 144         } else {
 145                 return value->handle;
 146         }
 147 }
 148 void _media_info_atomic_add_counting(HandleTable *handle_table)
 149 {
 150         pthread_mutex_lock(&mutex);
 151         handle_table->ref_cnt++;
 152         pthread_mutex_unlock(&mutex);
 153 }
 154
 155
 156 void _media_info_atomic_sub_counting(HandleTable *handle_table)
 157 {
 158         pthread_mutex_lock(&mutex);
 159         handle_table->ref_cnt--;
 160         pthread_mutex_unlock(&mutex);
 161 }
 162
 163 char *_media_info_generate_uuid()
 164 {
 165         uuid_t uuid_value;
 166         static char uuid_unparsed[50];
 167
 168         uuid_generate(uuid_value);
 169         uuid_unparse(uuid_value, uuid_unparsed);
 170
 171         //mediainfo_dbg("UUID : %s", uuid_unparsed);
 172         return uuid_unparsed;
 173 }
 174