Backend half

2025-07-11 19:56:28 +02:00
parent fa868e7c1d
commit 8600fa7c1d
19426 changed files with 3750448 additions and 8108 deletions
@@ -0,0 +1,46 @@
+//  SPDX-License-Identifier: LGPL-2.1-or-later
+//  Copyright (c) 2015-2024 MariaDB Corporation Ab
+
+'use strict';
+
+const PrepareWrapper = require('./prepare-wrapper');
+
+/**
+ * Prepare cache wrapper
+ * see https://mariadb.com/kb/en/com_stmt_prepare/#com_stmt_prepare_ok
+ */
+class PrepareCacheWrapper {
+  #use = 0;
+  #cached;
+  #prepare;
+
+  constructor(prepare) {
+    this.#prepare = prepare;
+    this.#cached = true;
+  }
+
+  incrementUse() {
+    this.#use += 1;
+    return new PrepareWrapper(this, this.#prepare);
+  }
+
+  unCache() {
+    this.#cached = false;
+    if (this.#use === 0) {
+      this.#prepare.close();
+    }
+  }
+
+  decrementUse() {
+    this.#use -= 1;
+    if (this.#use === 0 && !this.#cached) {
+      this.#prepare.close();
+    }
+  }
+
+  toString() {
+    return 'Prepare{use:' + this.#use + ',cached:' + this.#cached + '}';
+  }
+}
+
+module.exports = PrepareCacheWrapper;