Lift default allocation methods to static struct definition

Author: warmwaffles

c_src/sqlite3_nif.c

@@ -100,6 +100,19 @@ exqlite_mem_shutdown(void* ptr)
 {
 }
 
+///
+/// Define the default allocation methods
+///
+static sqlite3_mem_methods default_alloc_methods = {
+      exqlite_malloc,
+      exqlite_free,
+      exqlite_realloc,
+      exqlite_mem_size,
+      exqlite_mem_round_up,
+      exqlite_mem_init,
+      exqlite_mem_shutdown,
+      0};
+
 static const char*
 get_sqlite3_error_msg(int rc, sqlite3* db)
 {
@@ -861,17 +874,7 @@ on_load(ErlNifEnv* env, void** priv, ERL_NIF_TERM info)
 {
     assert(env);
 
-    static const sqlite3_mem_methods methods = {
-      exqlite_malloc,
-      exqlite_free,
-      exqlite_realloc,
-      exqlite_mem_size,
-      exqlite_mem_round_up,
-      exqlite_mem_init,
-      exqlite_mem_shutdown,
-      0};
-
-    sqlite3_config(SQLITE_CONFIG_MALLOC, &methods);
+    sqlite3_config(SQLITE_CONFIG_MALLOC, &default_alloc_methods);
 
     connection_type = enif_open_resource_type(
       env,
@@ -898,14 +901,6 @@ on_load(ErlNifEnv* env, void** priv, ERL_NIF_TERM info)
     return 0;
 }
 
-static void
-on_unload(ErlNifEnv* caller_env, void* priv_data)
-{
-    assert(env);
-
-    sqlite3_config(SQLITE_CONFIG_MALLOC, NULL);
-}
-
 //
 // Enable extension loading
 //
@@ -965,4 +960,4 @@ static ErlNifFunc nif_funcs[] = {
 #define ERL_NIF_INIT_DECL(MODNAME) ErlNifEntry* sqlite3_nif_nif_init(ERL_NIF_INIT_ARGS)
 #endif
 
-ERL_NIF_INIT(Elixir.Exqlite.Sqlite3NIF, nif_funcs, on_load, NULL, NULL, on_unload)
+ERL_NIF_INIT(Elixir.Exqlite.Sqlite3NIF, nif_funcs, on_load, NULL, NULL, NULL)