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
|
/* $Id$ */
/** @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.hpp"
#define DEFINE_POOL_METHOD(type) \
template <class Titem, typename Tindex, size_t Tgrowth_step, size_t Tmax_size> \
type Pool<Titem, Tindex, Tgrowth_step, Tmax_size>
DEFINE_POOL_METHOD(inline)::Pool(const char *name) :
name(name),
size(0),
first_free(0),
first_unused(0),
items(0),
cleaning(false),
data(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 = this->data[index] = (Titem *)CallocT<byte>(size);
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);
free(this->data[index]);
this->data[index] = NULL;
this->first_free = min(this->first_free, index);
this->items--;
}
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;
}
#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 */
|
