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100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
/*
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* This file is part of OpenTTD.
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* 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.
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* 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.
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* 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/>.
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*/
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/** @file newgrf_storage.cpp Functionality related to the temporary and persistent storage arrays for NewGRFs. */
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#include "stdafx.h"
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#include "newgrf_storage.h"
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#include "core/pool_func.hpp"
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#include "core/endian_func.hpp"
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#include "debug.h"
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#include "3rdparty/cpp-btree/btree_set.h"
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#include "safeguards.h"
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PersistentStoragePool _persistent_storage_pool("PersistentStorage");
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INSTANTIATE_POOL_METHODS(PersistentStorage)
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/** The changed storage arrays */
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static btree::btree_set<BasePersistentStorageArray*> _changed_storage_arrays;
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bool BasePersistentStorageArray::gameloop;
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bool BasePersistentStorageArray::command;
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bool BasePersistentStorageArray::testmode;
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/**
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* Remove references to use.
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*/
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BasePersistentStorageArray::~BasePersistentStorageArray()
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{
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_changed_storage_arrays.erase(this);
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}
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/**
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* Add the changed storage array to the list of changed arrays.
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* This is done so we only have to revert/save the changed
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* arrays, which saves quite a few clears, etc. after callbacks.
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* @param storage the array that has changed
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*/
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void AddChangedPersistentStorage(BasePersistentStorageArray *storage)
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{
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_changed_storage_arrays.insert(storage);
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}
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/**
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* Clear temporary changes made since the last call to SwitchMode, and
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* set whether subsequent changes shall be persistent or temporary.
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*
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* @param mode Mode switch affecting temporary/persistent changes.
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* @param ignore_prev_mode Disable some sanity checks for exceptional call circumstances.
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*/
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/* static */ void BasePersistentStorageArray::SwitchMode(PersistentStorageMode mode, [[maybe_unused]] bool ignore_prev_mode)
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{
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switch (mode) {
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case PSM_ENTER_GAMELOOP:
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assert(ignore_prev_mode || !gameloop);
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assert(!command && !testmode);
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gameloop = true;
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break;
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case PSM_LEAVE_GAMELOOP:
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assert(ignore_prev_mode || gameloop);
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assert(!command && !testmode);
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gameloop = false;
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break;
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case PSM_ENTER_COMMAND:
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assert((ignore_prev_mode || !command) && !testmode);
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command = true;
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break;
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case PSM_LEAVE_COMMAND:
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assert(ignore_prev_mode || command);
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command = false;
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break;
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case PSM_ENTER_TESTMODE:
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assert(!command && (ignore_prev_mode || !testmode));
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testmode = true;
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break;
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case PSM_LEAVE_TESTMODE:
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assert(ignore_prev_mode || testmode);
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testmode = false;
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break;
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default: NOT_REACHED();
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}
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/* Discard all temporary changes */
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for (auto &it : _changed_storage_arrays) {
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DEBUG(desync, 1, "Discarding persistent storage changes: Feature %d, GrfID %08X, Tile %d", it->feature, BSWAP32(it->grfid), it->tile);
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it->ClearChanges();
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}
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_changed_storage_arrays.clear();
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}
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