Compile only selected PIO environment (#11519)

Marlin/src/HAL/shared/persistent_store_api.h

@@ -0,0 +1,49 @@
+/**
+ * Marlin 3D Printer Firmware
+ *
+ * Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ * Copyright (c) 2016 Bob Cousins bobcousins42@googlemail.com
+ * Copyright (c) 2015-2016 Nico Tonnhofer wurstnase.reprap@gmail.com
+ * Copyright (c) 2016 Victor Perez victor_pv@hotmail.com
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+#pragma once
+
+#include <stddef.h>
+#include <stdint.h>
+
+class PersistentStore {
+public:
+  static bool access_start();
+  static bool access_finish();
+  static bool write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc);
+  static bool read_data(int &pos, uint8_t* value, size_t size, uint16_t *crc, const bool writing=true);
+  static const size_t capacity();
+
+  static inline bool write_data(const int pos, uint8_t* value, const size_t size) {
+    int data_pos = pos;
+    uint16_t crc = 0;
+    return write_data(data_pos, value, size, &crc);
+  }
+
+  static inline bool read_data(const int pos, uint8_t* value, const size_t size) {
+    int data_pos = pos;
+    uint16_t crc = 0;
+    return read_data(data_pos, value, size, &crc);
+  }
+};
+
+extern PersistentStore persistentStore;