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 "hal-common.h"
  23 #include "hal-common-interface.h"
  24
  25 #include "common.h"
  26 #include "hal-api-conf.h"
  27 #include "hal-api-list.h"
  28
  29 static GHashTable *_module_hash = NULL;
  30
  31 static int _usage_count = 0;
  32
  33 __attribute__ ((visibility("default")))
  34 void _destroy_module_info(gpointer data)
  35 {
  36 #define SAFE_FREE_AND_NULL(x) \
  37 do { \
  38         if (x) { \
  39                 free(x); \
  40                 x = NULL; \
  41         } \
  42 } while (0);
  43
  44         struct __hal_module_info *info = (struct __hal_module_info *)data;
  45
  46         if (info) {
  47                 SAFE_FREE_AND_NULL(info->module_name);
  48                 SAFE_FREE_AND_NULL(info->backend_module_name);
  49                 SAFE_FREE_AND_NULL(info->library_name);
  50                 SAFE_FREE_AND_NULL(info->library_name_64bit);
  51                 SAFE_FREE_AND_NULL(info->symbol_name);
  52                 SAFE_FREE_AND_NULL(info);
  53         }
  54 }
  55
  56 static struct __hal_module_info* _get_module_info(enum hal_module module)
  57 {
  58         return &g_hal_module_info[module];
  59 }
  60
  61 static struct __hal_module_info* _get_module_info_with_library_name(enum hal_module module,
  62                                                                 const char *library_name)
  63 {
  64         struct __hal_module_info *info = NULL, *new_info = NULL, *tmp_info = NULL;
  65         const char *group_name = NULL;
  66         const char *module_name = NULL;
  67         char *library_name_prefix = NULL;
  68         int ret;
  69
  70         if (!_module_hash || !library_name)
  71                 return NULL;
  72
  73         tmp_info = _get_module_info(module);
  74         if (tmp_info == NULL) {
  75                 _E("Failed to get HAL module(%d) information\n", module);
  76                 return NULL;
  77         }
  78
  79         if (tmp_info->backend_module_name == NULL) {
  80                 _E("Don't support HAL backend of HAL module(%s)\n",
  81                                 tmp_info->module_name);
  82                 return NULL;
  83         }
  84         library_name_prefix = g_strdup_printf("libhal-backend-%s",
  85                                 tmp_info->backend_module_name);
  86         if (!library_name_prefix) {
  87                 _E("Failed to allocate library_name_prefix of HAL module(%s)\n",
  88                                 tmp_info->module_name);
  89                 return NULL;
  90         }
  91
  92         if (!g_str_has_prefix(library_name, library_name_prefix)) {
  93                 _E("Invalid library name(%s) of HAL module(%s)\n",
  94                                 library_name, tmp_info->module_name);
  95                 goto out;
  96         }
  97
  98         /* Find module info with the passed library name */
  99         info = (struct __hal_module_info*)g_hash_table_lookup(_module_hash,
 100                                                 (gpointer)library_name);
 101         if (info) {
 102                 g_free(library_name_prefix);
 103                 return info;
 104         }
 105
 106         /* Create new module info with the passed library name */
 107         info = tmp_info;
 108
 109         new_info = (struct __hal_module_info *)calloc(1,
 110                                         sizeof(struct __hal_module_info));
 111         if (new_info == NULL) {
 112                 _E("Failed to allocate the memory\n");
 113                 goto out;
 114         }
 115
 116         new_info->usage_count = 0;
 117         new_info->group = info->group;
 118         new_info->module = info->module;
 119         new_info->license = info->license;
 120         new_info->module_name = g_strdup(info->module_name);
 121 #if defined(__aarch64__)
 122         new_info->library_name_64bit = g_strdup_printf("/hal/lib64/%s", library_name);
 123 #else
 124         new_info->library_name = g_strdup_printf("/hal/lib/%s", library_name);
 125 #endif
 126         new_info->symbol_name = g_strdup(info->symbol_name);
 127         new_info->num_abi_versions = info->num_abi_versions;
 128         new_info->abi_versions = info->abi_versions;
 129         new_info->hal_api = info->hal_api;
 130         new_info->hal_backend_extension = true;
 131
 132         g_hash_table_insert(_module_hash, (gpointer)library_name, new_info);
 133
 134 out:
 135         g_free(library_name_prefix);
 136
 137         return new_info;
 138 }
 139
 140 __attribute__ ((visibility("default")))
 141 struct __hal_module_info* _hal_api_conf_get_module_info(enum hal_module module,
 142                                                         const char *library_name)
 143 {
 144         if (!_module_hash)
 145                 return NULL;
 146
 147         if (!library_name)
 148                 return _get_module_info(module);
 149         else
 150                 return _get_module_info_with_library_name(module, library_name);
 151 }
 152
 153
 154 enum hal_abi_version _hal_api_conf_get_platform_abi_version(void)
 155 {
 156         return g_platform_curr_abi_version;
 157 }
 158
 159 __attribute__ ((visibility("default")))
 160 int _hal_api_conf_init(void)
 161 {
 162         if (_usage_count++ > 0)
 163                 return 0;
 164
 165         _module_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, _destroy_module_info);
 166
 167         return 0;
 168 }
 169
 170 __attribute__ ((visibility("default")))
 171 void _hal_api_conf_exit(void)
 172 {
 173         _usage_count--;
 174         if (_usage_count != 0)
 175                 return;
 176
 177         if (_module_hash) {
 178                 g_hash_table_remove_all(_module_hash);
 179                 g_hash_table_unref(_module_hash);
 180         }
 181 }