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Codechange: Replace SmallStackSafeStackAlloc with std::array.

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The only port that ever used it to make heap allocations instead of stack ones was the NDS port, which got thrown out some time ago.
pull/88/head
Michael Lutz 5 years ago committed by Charles Pigott
parent 79343762a4
commit 4e85ccf3c0
3 changed files with 49 additions and 90 deletions
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43
src/core/alloc_type.hpp
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@ -14,49 +14,6 @@
#include "alloc_func.hpp"
/**
* A small 'wrapper' for allocations that can be done on most OSes on the
* stack, but are just too large to fit in the stack on devices with a small
* stack such as the NDS.
* So when it is possible a stack allocation is made, otherwise a heap
* allocation is made and this is freed once the struct goes out of scope.
* @param T the type to make the allocation for
* @param length the amount of items to allocate
*/
template <typename T, size_t length>
struct SmallStackSafeStackAlloc {
/** Storing the data on the stack */
T data[length];
/**
* Gets a pointer to the data stored in this wrapper.
* @return the pointer.
*/
inline operator T *()
{
return data;
}
/**
* Gets a pointer to the data stored in this wrapper.
* @return the pointer.
*/
inline T *operator -> ()
{
return data;
}
/**
* Gets a pointer to the last data element stored in this wrapper.
* @note needed because endof does not work properly for pointers.
* @return the 'endof' pointer.
*/
inline T *EndOf()
{
return endof(data);
}
};
/**
* A reusable buffer that can be used for places that temporary allocate
* a bit of memory and do that very often, or for places where static

83
src/saveload/map_sl.cpp
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@ -13,6 +13,7 @@
#include "../map_func.h"
#include "../core/bitmath_func.hpp"
#include "../fios.h"
#include <array>
#include "saveload.h"
@ -51,80 +52,80 @@ static const uint MAP_SL_BUF_SIZE = 4096;
static void Load_MAPT()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].type = buf[j];
}
}
static void Save_MAPT()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].type;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAPH()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].height = buf[j];
}
}
static void Save_MAPH()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].height;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP1()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m1 = buf[j];
}
}
static void Save_MAP1()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m1;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP2()
{
SmallStackSafeStackAlloc<uint16, MAP_SL_BUF_SIZE> buf;
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE,
SlArray(buf.data(), MAP_SL_BUF_SIZE,
/* In those versions the m2 was 8 bits */
IsSavegameVersionBefore(SLV_5) ? SLE_FILE_U8 | SLE_VAR_U16 : SLE_UINT16
);
@ -134,94 +135,94 @@ static void Load_MAP2()
static void Save_MAP2()
{
SmallStackSafeStackAlloc<uint16, MAP_SL_BUF_SIZE> buf;
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size * sizeof(uint16));
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m2;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT16);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
}
}
static void Load_MAP3()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m3 = buf[j];
}
}
static void Save_MAP3()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m3;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP4()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m4 = buf[j];
}
}
static void Save_MAP4()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m4;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP5()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _m[i++].m5 = buf[j];
}
}
static void Save_MAP5()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _m[i++].m5;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP6()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
if (IsSavegameVersionBefore(SLV_42)) {
for (TileIndex i = 0; i != size;) {
/* 1024, otherwise we overflow on 64x64 maps! */
SlArray(buf, 1024, SLE_UINT8);
SlArray(buf.data(), 1024, SLE_UINT8);
for (uint j = 0; j != 1024; j++) {
_me[i++].m6 = GB(buf[j], 0, 2);
_me[i++].m6 = GB(buf[j], 2, 2);
@ -231,7 +232,7 @@ static void Load_MAP6()
}
} else {
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m6 = buf[j];
}
}
@ -239,59 +240,59 @@ static void Load_MAP6()
static void Save_MAP6()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m6;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP7()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m7 = buf[j];
}
}
static void Save_MAP7()
{
SmallStackSafeStackAlloc<byte, MAP_SL_BUF_SIZE> buf;
std::array<byte, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size);
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m7;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT8);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT8);
}
}
static void Load_MAP8()
{
SmallStackSafeStackAlloc<uint16, MAP_SL_BUF_SIZE> buf;
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
for (TileIndex i = 0; i != size;) {
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT16);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) _me[i++].m8 = buf[j];
}
}
static void Save_MAP8()
{
SmallStackSafeStackAlloc<uint16, MAP_SL_BUF_SIZE> buf;
std::array<uint16, MAP_SL_BUF_SIZE> buf;
TileIndex size = MapSize();
SlSetLength(size * sizeof(uint16));
for (TileIndex i = 0; i != size;) {
for (uint j = 0; j != MAP_SL_BUF_SIZE; j++) buf[j] = _me[i++].m8;
SlArray(buf, MAP_SL_BUF_SIZE, SLE_UINT16);
SlArray(buf.data(), MAP_SL_BUF_SIZE, SLE_UINT16);
}
}

13
src/saveload/oldloader_sl.cpp
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@ -31,6 +31,7 @@
#include "../core/smallvec_type.hpp"
#include "saveload_internal.h"
#include "oldloader.h"
#include <array>
#include "table/strings.h"
#include "../table/engines.h"
@ -1754,8 +1755,8 @@ bool LoadTTDMain(LoadgameState *ls)
_read_ttdpatch_flags = false;
/* Load the biggest chunk */
SmallStackSafeStackAlloc<byte, OLD_MAP_SIZE * 2> map3;
_old_map3 = map3.data;
std::array<byte, OLD_MAP_SIZE * 2> map3;
_old_map3 = map3.data();
_old_vehicle_names = nullptr;
try {
if (!LoadChunk(ls, nullptr, main_chunk)) {
@ -1797,10 +1798,10 @@ bool LoadTTOMain(LoadgameState *ls)
_read_ttdpatch_flags = false;
SmallStackSafeStackAlloc<byte, 103 * sizeof(Engine)> engines; // we don't want to call Engine constructor here
_old_engines = (Engine *)engines.data;
SmallStackSafeStackAlloc<StringID, 800> vehnames;
_old_vehicle_names = vehnames.data;
std::array<byte, 103 * sizeof(Engine)> engines; // we don't want to call Engine constructor here
_old_engines = (Engine *)engines.data();
std::array<StringID, 800> vehnames;
_old_vehicle_names = vehnames.data();
/* Load the biggest chunk */
if (!LoadChunk(ls, nullptr, main_chunk)) {

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