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
|
/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program 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; either version 2
* of the License, or (at your option) any later version.
* This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#include "sword1/memman.h"
#include "common/util.h"
namespace Sword1 {
MemMan::MemMan(void) {
_alloced = 0;
_memListFree = _memListFreeEnd = NULL;
}
MemMan::~MemMan(void) {
flush();
if (_alloced)
warning("deleting MemMan, still %d bytes alloced\n", _alloced);
}
void MemMan::alloc(MemHandle *bsMem, uint32 pSize, uint16 pCond) {
_alloced += pSize;
bsMem->data = (void*)malloc(pSize);
if (!bsMem->data)
error("MemMan::alloc(): Can't alloc %d bytes of memory.", pSize);
bsMem->cond = pCond;
bsMem->size = pSize;
if (pCond == MEM_CAN_FREE) {
warning("%d Bytes alloced as FREEABLE.", pSize); // why should one want to alloc mem if it can be freed?
addToFreeList(bsMem);
} else if (bsMem->next || bsMem->prev) // it's in our _freeAble list, remove it from there
removeFromFreeList(bsMem);
checkMemoryUsage();
}
void MemMan::freeNow(MemHandle *bsMem) {
if (bsMem->cond != MEM_FREED) {
_alloced -= bsMem->size;
removeFromFreeList(bsMem);
free(bsMem->data);
bsMem->cond = MEM_FREED;
}
}
void MemMan::setCondition(MemHandle *bsMem, uint16 pCond) {
if ((pCond == MEM_FREED) || (pCond > MEM_DONT_FREE))
error("MemMan::setCondition: program tried to set illegal memory condition");
if (bsMem->cond != pCond) {
bsMem->cond = pCond;
if (pCond == MEM_DONT_FREE)
removeFromFreeList(bsMem);
else if (pCond == MEM_CAN_FREE)
addToFreeList(bsMem);
}
}
void MemMan::flush(void) {
while (_memListFree) {
free(_memListFreeEnd->data);
_memListFreeEnd->data = NULL;
_memListFreeEnd->cond = MEM_FREED;
_alloced -= _memListFreeEnd->size;
removeFromFreeList(_memListFreeEnd);
}
if (_alloced)
warning("MemMan::flush: Something's wrong: still %d bytes alloced", _alloced);
}
void MemMan::checkMemoryUsage(void) {
while ((_alloced > MAX_ALLOC) && _memListFree) {
free(_memListFreeEnd->data);
_memListFreeEnd->data = NULL;
_memListFreeEnd->cond = MEM_FREED;
_alloced -= _memListFreeEnd->size;
removeFromFreeList(_memListFreeEnd);
}
}
void MemMan::addToFreeList(MemHandle *bsMem) {
if (bsMem->next || bsMem->prev) {
warning("addToFreeList: mem block is already in freeList");
return;
}
bsMem->prev = NULL;
bsMem->next = _memListFree;
if (bsMem->next)
bsMem->next->prev = bsMem;
_memListFree = bsMem;
if (!_memListFreeEnd)
_memListFreeEnd = _memListFree;
}
void MemMan::removeFromFreeList(MemHandle *bsMem) {
if (_memListFree == bsMem)
_memListFree = bsMem->next;
if (_memListFreeEnd == bsMem)
_memListFreeEnd = bsMem->prev;
if (bsMem->next)
bsMem->next->prev = bsMem->prev;
if (bsMem->prev)
bsMem->prev->next = bsMem->next;
bsMem->next = bsMem->prev = NULL;
}
void MemMan::initHandle(MemHandle *bsMem) {
memset(bsMem, 0, sizeof(MemHandle));
}
} // End of namespace Sword1
|
