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         char *library_name_prefix = NULL;
  66
  67         if (!_module_hash || !library_name)
  68                 return NULL;
  69
  70         tmp_info = _get_module_info(module);
  71         if (tmp_info == NULL) {
  72                 _E("Failed to get HAL module(%d) information\n", module);
  73                 return NULL;
  74         }
  75
  76         if (tmp_info->backend_module_name == NULL) {
  77                 _E("Don't support HAL backend of HAL module(%s)\n",
  78                                 tmp_info->module_name);
  79                 return NULL;
  80         }
  81         library_name_prefix = g_strdup_printf("libhal-backend-%s",
  82                                 tmp_info->backend_module_name);
  83         if (!library_name_prefix) {
  84                 _E("Failed to allocate library_name_prefix of HAL module(%s)\n",
  85                                 tmp_info->module_name);
  86                 return NULL;
  87         }
  88
  89         if (!g_str_has_prefix(library_name, library_name_prefix)) {
  90                 _E("Invalid library name(%s) of HAL module(%s)\n",
  91                                 library_name, tmp_info->module_name);
  92                 goto out;
  93         }
  94
  95         /* Find module info with the passed library name */
  96         info = (struct __hal_module_info*)g_hash_table_lookup(_module_hash,
  97                                                 (gpointer)library_name);
  98         if (info) {
  99                 g_free(library_name_prefix);
 100                 return info;
 101         }
 102
 103         /* Create new module info with the passed library name */
 104         info = tmp_info;
 105
 106         new_info = (struct __hal_module_info *)calloc(1,
 107                                         sizeof(struct __hal_module_info));
 108         if (new_info == NULL) {
 109                 _E("Failed to allocate the memory\n");
 110                 goto out;
 111         }
 112
 113         new_info->usage_count = 0;
 114         new_info->group = info->group;
 115         new_info->module = info->module;
 116         new_info->license = info->license;
 117         new_info->module_name = g_strdup(info->module_name);
 118 #if defined(__aarch64__) || defined(__x86_64__) || defined(__riscv)
 119         new_info->library_name_64bit = g_strdup_printf("/hal/lib64/%s", library_name);
 120 #else
 121         new_info->library_name = g_strdup_printf("/hal/lib/%s", library_name);
 122 #endif
 123         new_info->symbol_name = g_strdup(info->symbol_name);
 124         new_info->num_abi_versions = info->num_abi_versions;
 125         new_info->abi_versions = info->abi_versions;
 126         new_info->hal_api = info->hal_api;
 127         new_info->hal_backend_extension = true;
 128
 129         g_hash_table_insert(_module_hash, (gpointer)library_name, new_info);
 130
 131 out:
 132         g_free(library_name_prefix);
 133
 134         return new_info;
 135 }
 136
 137 __attribute__ ((visibility("default")))
 138 struct __hal_module_info* _hal_api_conf_get_module_info(enum hal_module module,
 139                                                         const char *library_name)
 140 {
 141         if (!_module_hash)
 142                 return NULL;
 143
 144         if (!library_name)
 145                 return _get_module_info(module);
 146         else
 147                 return _get_module_info_with_library_name(module, library_name);
 148 }
 149
 150
 151 enum hal_abi_version _hal_api_conf_get_platform_abi_version(void)
 152 {
 153         return g_platform_curr_abi_version;
 154 }
 155
 156 __attribute__ ((visibility("default")))
 157 int _hal_api_conf_init(void)
 158 {
 159         if (_usage_count++ > 0)
 160                 return 0;
 161
 162         _module_hash = g_hash_table_new_full(g_direct_hash, g_direct_equal, NULL, _destroy_module_info);
 163
 164         return 0;
 165 }
 166
 167 __attribute__ ((visibility("default")))
 168 void _hal_api_conf_exit(void)
 169 {
 170         _usage_count--;
 171         if (_usage_count != 0)
 172                 return;
 173
 174         if (_module_hash) {
 175                 g_hash_table_remove_all(_module_hash);
 176                 g_hash_table_unref(_module_hash);
 177         }
 178 }