Initialize with OpenTTD 1.9.3

src/newgrf_storage.cpp

@@ -0,0 +1,101 @@
+/* $Id$ */
+
+/*
+ * This file is part of OpenTTD.
+ * OpenTTD 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, version 2.
+ * OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/** @file newgrf_storage.cpp Functionality related to the temporary and persistent storage arrays for NewGRFs. */
+
+#include "stdafx.h"
+#include "newgrf_storage.h"
+#include "core/pool_func.hpp"
+#include "core/endian_func.hpp"
+#include "debug.h"
+#include <set>
+
+#include "safeguards.h"
+
+PersistentStoragePool _persistent_storage_pool("PersistentStorage");
+INSTANTIATE_POOL_METHODS(PersistentStorage)
+
+/** The changed storage arrays */
+static std::set<BasePersistentStorageArray*> *_changed_storage_arrays = new std::set<BasePersistentStorageArray*>;
+
+bool BasePersistentStorageArray::gameloop;
+bool BasePersistentStorageArray::command;
+bool BasePersistentStorageArray::testmode;
+
+/**
+ * Remove references to use.
+ */
+BasePersistentStorageArray::~BasePersistentStorageArray()
+{
+	_changed_storage_arrays->erase(this);
+}
+
+/**
+ * Add the changed storage array to the list of changed arrays.
+ * This is done so we only have to revert/save the changed
+ * arrays, which saves quite a few clears, etc. after callbacks.
+ * @param storage the array that has changed
+ */
+void AddChangedPersistentStorage(BasePersistentStorageArray *storage)
+{
+	_changed_storage_arrays->insert(storage);
+}
+
+/**
+ * Clear temporary changes made since the last call to SwitchMode, and
+ * set whether subsequent changes shall be persistent or temporary.
+ *
+ * @param mode Mode switch affecting temporary/persistent changes.
+ * @param ignore_prev_mode Disable some sanity checks for exceptional call circumstances.
+ */
+/* static */ void BasePersistentStorageArray::SwitchMode(PersistentStorageMode mode, bool ignore_prev_mode)
+{
+	switch (mode) {
+		case PSM_ENTER_GAMELOOP:
+			assert(ignore_prev_mode || !gameloop);
+			assert(!command && !testmode);
+			gameloop = true;
+			break;
+
+		case PSM_LEAVE_GAMELOOP:
+			assert(ignore_prev_mode || gameloop);
+			assert(!command && !testmode);
+			gameloop = false;
+			break;
+
+		case PSM_ENTER_COMMAND:
+			assert((ignore_prev_mode || !command) && !testmode);
+			command = true;
+			break;
+
+		case PSM_LEAVE_COMMAND:
+			assert(ignore_prev_mode || command);
+			command = false;
+			break;
+
+		case PSM_ENTER_TESTMODE:
+			assert(!command && (ignore_prev_mode || !testmode));
+			testmode = true;
+			break;
+
+		case PSM_LEAVE_TESTMODE:
+			assert(ignore_prev_mode || testmode);
+			testmode = false;
+			break;
+
+		default: NOT_REACHED();
+	}
+
+	/* Discard all temporary changes */
+	for (std::set<BasePersistentStorageArray*>::iterator it = _changed_storage_arrays->begin(); it != _changed_storage_arrays->end(); it++) {
+		DEBUG(desync, 1, "Discarding persistent storage changes: Feature %d, GrfID %08X, Tile %d", (*it)->feature, BSWAP32((*it)->grfid), (*it)->tile);
+		(*it)->ClearChanges();
+	}
+	_changed_storage_arrays->clear();
+}