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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
/*
TiMidity++ -- MIDI to WAVE converter and player
Copyright (C) 1999,2000 Masanao Izumo <mo@goice.co.jp>
Copyright (C) 1995 Tuukka Toivonen <tt@cgs.fi>
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#include <stdio.h>
#include <stdlib.h>
#ifndef NO_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#include "timidity.h"
#include "mblock.h"
#ifdef HAVE_SAFE_MALLOC
extern void *safe_malloc(size_t count);
#define malloc safe_malloc
#endif /* HAVE_SAFE_MALLOC */
static MBlockNode *free_mblock_list = NULL;
#define ADDRALIGN 8
/* #define DEBUG */
void init_mblock(MBlockList *mblock)
{
mblock->first = NULL;
mblock->allocated = 0;
}
static MBlockNode *new_mblock_node(size_t n)
{
MBlockNode *p;
if(n > MIN_MBLOCK_SIZE)
{
if((p = (MBlockNode *)malloc(n + sizeof(MBlockNode))) == NULL)
return NULL;
p->block_size = n;
}
else if(free_mblock_list == NULL)
{
if((p = (MBlockNode *)malloc(sizeof(MBlockNode)
+ MIN_MBLOCK_SIZE)) == NULL)
return NULL;
p->block_size = MIN_MBLOCK_SIZE;
}
else
{
p = free_mblock_list;
free_mblock_list = free_mblock_list->next;
}
p->offset = 0;
p->next = NULL;
return p;
}
static int enough_block_memory(MBlockList *mblock, size_t n)
{
size_t newoffset;
if(mblock->first == NULL)
return 0;
newoffset = mblock->first->offset + n;
if(newoffset < mblock->first->offset) /* exceed representable in size_t */
return 0;
if(newoffset > mblock->first->block_size)
return 0;
return 1;
}
void *new_segment(MBlockList *mblock, size_t nbytes)
{
MBlockNode *p;
void *addr;
/* round up to ADDRALIGN */
nbytes = ((nbytes + ADDRALIGN - 1) & ~(ADDRALIGN - 1));
if(!enough_block_memory(mblock, nbytes))
{
p = new_mblock_node(nbytes);
p->next = mblock->first;
mblock->first = p;
mblock->allocated += p->block_size;
}
else
p = mblock->first;
addr = (void *)(p->buffer + p->offset);
p->offset += nbytes;
#ifdef DEBUG
if(((unsigned long)addr) & (ADDRALIGN-1))
{
fprintf(stderr, "Bad address: 0x%x\n", addr);
exit(1);
}
#endif /* DEBUG */
return addr;
}
static void reuse_mblock1(MBlockNode *p)
{
if(p->block_size > MIN_MBLOCK_SIZE)
free(p);
else /* p->block_size <= MIN_MBLOCK_SIZE */
{
p->next = free_mblock_list;
free_mblock_list = p;
}
}
void reuse_mblock(MBlockList *mblock)
{
MBlockNode *p;
if((p = mblock->first) == NULL)
return; /* There is nothing to collect memory */
while(p)
{
MBlockNode *tmp;
tmp = p;
p = p->next;
reuse_mblock1(tmp);
}
init_mblock(mblock);
}
char *strdup_mblock(MBlockList *mblock, const char *str)
{
int len;
char *p;
len = strlen(str);
p = (char *)new_segment(mblock, len + 1); /* for '\0' */
memcpy(p, str, len + 1);
return p;
}
int free_global_mblock(void)
{
int cnt;
cnt = 0;
while(free_mblock_list)
{
MBlockNode *tmp;
tmp = free_mblock_list;
free_mblock_list = free_mblock_list->next;
free(tmp);
cnt++;
}
return cnt;
}
|