OpenTTD Source  20241121-master-g67a0fccfad
newgrf_storage.cpp
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1 /*
2  * This file is part of OpenTTD.
3  * 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.
4  * 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.
5  * 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/>.
6  */
7 
10 #include "stdafx.h"
11 #include "newgrf_storage.h"
12 #include "core/pool_func.hpp"
13 #include "core/endian_func.hpp"
14 #include "debug.h"
15 
16 #include "safeguards.h"
17 
18 PersistentStoragePool _persistent_storage_pool("PersistentStorage");
20 
21 
23 
24 bool BasePersistentStorageArray::gameloop;
25 bool BasePersistentStorageArray::command;
26 bool BasePersistentStorageArray::testmode;
27 
32 {
33  _changed_storage_arrays->erase(this);
34 }
35 
43 {
44  _changed_storage_arrays->insert(storage);
45 }
46 
54 /* static */ void BasePersistentStorageArray::SwitchMode(PersistentStorageMode mode, [[maybe_unused]] bool ignore_prev_mode)
55 {
56  switch (mode) {
57  case PSM_ENTER_GAMELOOP:
58  assert(ignore_prev_mode || !gameloop);
59  assert(!command && !testmode);
60  gameloop = true;
61  break;
62 
63  case PSM_LEAVE_GAMELOOP:
64  assert(ignore_prev_mode || gameloop);
65  assert(!command && !testmode);
66  gameloop = false;
67  break;
68 
69  case PSM_ENTER_COMMAND:
70  assert((ignore_prev_mode || !command) && !testmode);
71  command = true;
72  break;
73 
74  case PSM_LEAVE_COMMAND:
75  assert(ignore_prev_mode || command);
76  command = false;
77  break;
78 
79  case PSM_ENTER_TESTMODE:
80  assert(!command && (ignore_prev_mode || !testmode));
81  testmode = true;
82  break;
83 
84  case PSM_LEAVE_TESTMODE:
85  assert(ignore_prev_mode || testmode);
86  testmode = false;
87  break;
88 
89  default: NOT_REACHED();
90  }
91 
92  /* Discard all temporary changes */
93  for (auto &it : *_changed_storage_arrays) {
94  Debug(desync, 2, "warning: discarding persistent storage changes: Feature {}, GrfID {:08X}, Tile {}", it->feature, BSWAP32(it->grfid), it->tile);
95  it->ClearChanges();
96  }
97  _changed_storage_arrays->clear();
98 }
static uint32_t BSWAP32(uint32_t x)
Perform a 32 bits endianness bitswap on x.
Functions related to debugging.
#define Debug(category, level, format_string,...)
Ouptut a line of debugging information.
Definition: debug.h:37
Function to handling different endian machines.
void AddChangedPersistentStorage(BasePersistentStorageArray *storage)
Add the changed storage array to the list of changed arrays.
static std::set< BasePersistentStorageArray * > * _changed_storage_arrays
The changed storage arrays.
Functionality related to the temporary and persistent storage arrays for NewGRFs.
PersistentStorageMode
Mode switches to the behaviour of persistent storage array.
@ PSM_ENTER_GAMELOOP
Enter the gameloop, changes will be permanent.
@ PSM_LEAVE_TESTMODE
Leave command test mode, revert to previous mode.
@ PSM_LEAVE_COMMAND
Leave command scope, revert to previous mode.
@ PSM_LEAVE_GAMELOOP
Leave the gameloop, changes will be temporary.
@ PSM_ENTER_COMMAND
Enter command scope, changes will be permanent.
@ PSM_ENTER_TESTMODE
Enter command test mode, changes will be temporary.
Some methods of Pool are placed here in order to reduce compilation time and binary size.
#define INSTANTIATE_POOL_METHODS(name)
Force instantiation of pool methods so we don't get linker errors.
Definition: pool_func.hpp:237
A number of safeguards to prevent using unsafe methods.
Definition of base types and functions in a cross-platform compatible way.
Base class for all persistent NewGRF storage arrays.
static void SwitchMode(PersistentStorageMode mode, bool ignore_prev_mode=false)
Clear temporary changes made since the last call to SwitchMode, and set whether subsequent changes sh...
Class for pooled persistent storage of data.
Base class for all pools.
Definition: pool_type.hpp:80