src/hal-api-conf.c

   1 /*
   2  * Copyright (c) 2021 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the License);
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <stdlib.h>
  18
  19 #include <gio/gio.h>
  20 #include <glib-object.h>
  21
  22 #include <json-c/json.h>
  23 #include <json-c/arraylist.h>
  24
  25 #include "hal-common.h"
  26 #include "hal-common-interface.h"
  27
  28 #include "common.h"
  29 #include "hal-api-conf.h"
  30 #include "hal-api-list.h"
  31
  32 static GHashTable *_module_hash = NULL;
  33
  34 static int _usage_count = 0;
  35
  36 __attribute__ ((visibility("default")))
  37 void _destroy_module_info(gpointer data)
  38 {
  39 #define SAFE_FREE_AND_NULL(x) \
  40 do { \
  41         if (x) { \
  42                 free(x); \
  43                 x = NULL; \
  44         } \
  45 } while (0);
  46
  47         struct __hal_module_info *info = (struct __hal_module_info *)data;
  48
  49         if (info) {
  50                 SAFE_FREE_AND_NULL(info->module_name);
  51                 SAFE_FREE_AND_NULL(info->backend_module_name);
  52                 SAFE_FREE_AND_NULL(info->library_name);
  53                 SAFE_FREE_AND_NULL(info->library_name_64bit);
  54                 SAFE_FREE_AND_NULL(info->symbol_name);
  55                 SAFE_FREE_AND_NULL(info);
  56         }
  57 }
  58
  59 static struct __hal_module_info* _get_module_info(enum hal_module module)
  60 {
  61         return &g_hal_module_info[module];
  62 }
  63
  64 static struct __hal_module_info* _get_module_info_with_library_name(enum hal_module module,
  65                                                                 const char *library_name)
  66 {
  67         struct __hal_module_info *info = NULL, *new_info = NULL, *tmp_info = NULL;
  68         json_object *module_array_object = NULL;
  69         const char *group_name = NULL;
  70         const char *module_name = NULL;
  71         char *library_name_prefix = NULL;
  72         int ret;
  73
  74         if (!_module_hash || !library_name)
  75                 return NULL;
  76
  77         tmp_info = _get_module_info(module);
  78         if (tmp_info == NULL) {
  79                 _E("Failed to get HAL module(%d) information\n", module);
  80                 return NULL;
  81         }
  82
  83         if (tmp_info->backend_module_name == NULL) {
  84                 _E("Don't support HAL backend of HAL module(%s)\n",
  85                                 tmp_info->module_name);
  86                 return NULL;
  87         }
  88         library_name_prefix = g_strdup_printf("libhal-backend-%s",
  89                                 tmp_info->backend_module_name);
  90         if (!library_name_prefix) {
  91                 _E("Failed to allocate library_name_prefix of HAL module(%s)\n",
  92                                 tmp_info->module_name);
  93                 return NULL;
  94         }
  95
  96         if (!g_str_has_prefix(library_name, library_name_prefix)) {
  97                 _E("Invalid library name(%s) of HAL module(%s)\n",
  98                                 library_name, tmp_info->module_name);
  99                 goto out;
 100         }
 101
 102         /* Find module info with the passed library name */
 103         info = (struct __hal_module_info*)g_hash_table_lookup(_module_hash,
 104                                                 (gpointer)library_name);
 105         if (info) {
 106                 g_free(library_name_prefix);
 107                 return info;
 108         }
 109
 110         /* Create new module info with the passed library name */
 111         info = tmp_info;
 112
 113         new_info = (struct __hal_module_info *)calloc(1,
 114                                         sizeof(struct __hal_module_info));
 115         if (new_info == NULL) {
 116                 _E("Failed to allocate the memory\n");
 117                 goto out;
 118         }
 119
 120         new_info->usage_count = 0;
 121         new_info->group = info->group;
 122         new_info->module = info->module;
 123         new_info->license = info->license;
 124         new_info->module_name = g_strdup(info->module_name);
 125 #if defined(__aarch64__)
 126         new_info->library_name_64bit = g_strdup_printf("/hal/lib64/%s", library_name);
 127 #else
 128         new_info->library_name = g_strdup_printf("/hal/lib/%s", library_name);
 129 #endif
 130         new_info->symbol_name = g_strdup(info->symbol_name);
 131         new_info->num_abi_versions = info->num_abi_versions;
 132         new_info->abi_versions = info->abi_versions;
 133         new_info->hal_api = info->hal_api;
 134         new_info->hal_backend_extension = true;
 135
 136         g_hash_table_insert(_module_hash, (gpointer)library_name, new_info);
 137
 138 out:
 139         g_free(library_name_prefix);
 140
 141         return new_info;
 142 }
 143
 144 __attribute__ ((visibility("default")))
 145 struct __hal_module_info* _hal_api_conf_get_module_info(enum hal_module module,
 146                                                         const char *library_name)
 147 {
 148         if (!_module_hash)
 149                 return NULL;
 150
 151         if (!library_name)
 152                 return _get_module_info(module);
 153         else
 154                 return _get_module_info_with_library_name(module, library_name);
 155 }
 156
 157
 158 enum hal_abi_version _hal_api_conf_get_platform_abi_version(void)
 159 {
 160         return g_platform_curr_abi_version;
 161 }
 162
 163 __attribute__ ((visibility("default")))
 164 int _hal_api_conf_init(void)
 165 {
 166         if (_usage_count++ > 0)
 167                 return 0;
 168
 169         _module_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, _destroy_module_info);
 170
 171         return 0;
 172 }
 173
 174 __attribute__ ((visibility("default")))
 175 void _hal_api_conf_exit(void)
 176 {
 177         _usage_count--;
 178         if (_usage_count != 0)
 179                 return;
 180
 181         if (_module_hash) {
 182                 g_hash_table_remove_all(_module_hash);
 183                 g_hash_table_unref(_module_hash);
 184         }
 185 }