1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* $Id$ */
/*
* 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 pool_func.hpp Some methods of Pool are placed here in order to reduce compilation time and binary size. */
#ifndef POOL_FUNC_HPP
#define POOL_FUNC_HPP
#include "alloc_func.hpp"
#include "mem_func.hpp"
#include "pool_type.hpp"
#define DEFINE_POOL_METHOD(type) \
template <class Titem, typename Tindex, size_t Tgrowth_step, size_t Tmax_size, bool Tcache, bool Tzero> \
type Pool<Titem, Tindex, Tgrowth_step, Tmax_size, Tcache, Tzero>
DEFINE_POOL_METHOD(inline)::Pool(const char *name) :
name(name),
size(0),
first_free(0),
first_unused(0),
items(0),
cleaning(false),
data(NULL),
alloc_cache(NULL)
{ }
DEFINE_POOL_METHOD(inline void)::ResizeFor(size_t index)
{
assert(index >= this->size);
assert(index < Tmax_size);
size_t new_size = min(Tmax_size, Align(index + 1, Tgrowth_step));
this->data = ReallocT(this->data, new_size);
MemSetT(this->data + this->size, 0, new_size - this->size);
this->size = new_size;
}
DEFINE_POOL_METHOD(inline size_t)::FindFirstFree()
{
size_t index = this->first_free;
for (; index < this->first_unused; index++) {
if (this->data[index] == NULL) return index;
}
if (index < this->size) {
return index;
}
assert(index == this->size);
assert(this->first_unused == this->size);
if (index < Tmax_size) {
this->ResizeFor(index);
return index;
}
assert(this->items == Tmax_size);
return NO_FREE_ITEM;
}
DEFINE_POOL_METHOD(inline void *)::AllocateItem(size_t size, size_t index)
{
assert(this->data[index] == NULL);
this->first_unused = max(this->first_unused, index + 1);
this->items++;
Titem *item;
if (Tcache && this->alloc_cache != NULL) {
assert(sizeof(Titem) == size);
item = (Titem *)this->alloc_cache;
this->alloc_cache = this->alloc_cache->next;
if (Tzero) MemSetT(item, 0);
} else if (Tzero) {
item = (Titem *)CallocT<byte>(size);
} else {
item = (Titem *)MallocT<byte>(size);
}
this->data[index] = item;
item->index = (uint)index;
return item;
}
DEFINE_POOL_METHOD(void *)::GetNew(size_t size)
{
size_t index = this->FindFirstFree();
if (index == NO_FREE_ITEM) {
error("%s: no more free items", this->name);
}
this->first_free = index + 1;
return this->AllocateItem(size, index);
}
DEFINE_POOL_METHOD(void *)::GetNew(size_t size, size_t index)
{
if (index >= Tmax_size) {
usererror("failed loading savegame: %s index " PRINTF_SIZE " out of range (" PRINTF_SIZE ")", this->name, index, Tmax_size);
}
if (index >= this->size) this->ResizeFor(index);
if (this->data[index] != NULL) {
usererror("failed loading savegame: %s index " PRINTF_SIZE " already in use", this->name, index);
}
return this->AllocateItem(size, index);
}
DEFINE_POOL_METHOD(void)::FreeItem(size_t index)
{
assert(index < this->size);
assert(this->data[index] != NULL);
if (Tcache) {
AllocCache *ac = (AllocCache *)this->data[index];
ac->next = this->alloc_cache;
this->alloc_cache = ac;
} else {
free(this->data[index]);
}
this->data[index] = NULL;
this->first_free = min(this->first_free, index);
this->items--;
if (!this->cleaning) Titem::PostDestructor(index);
}
DEFINE_POOL_METHOD(void)::CleanPool()
{
this->cleaning = true;
for (size_t i = 0; i < this->first_unused; i++) {
delete this->Get(i); // 'delete NULL;' is very valid
}
assert(this->items == 0);
free(this->data);
this->first_unused = this->first_free = this->size = 0;
this->data = NULL;
this->cleaning = false;
if (Tcache) {
while (this->alloc_cache != NULL) {
AllocCache *ac = this->alloc_cache;
this->alloc_cache = ac->next;
free(ac);
}
}
}
#undef DEFINE_POOL_METHOD
/**
* Force instantiation of pool methods so we don't get linker errors.
* Only methods accessed from methods defined in pool.hpp need to be
* forcefully instantiated.
*/
#define INSTANTIATE_POOL_METHODS(name) \
template void * name ## Pool::GetNew(size_t size); \
template void * name ## Pool::GetNew(size_t size, size_t index); \
template void name ## Pool::FreeItem(size_t index); \
template void name ## Pool::CleanPool();
#endif /* POOL_FUNC_HPP */
|
