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
|
/* <!-- copyright */
/*
* aria2 - a simple utility for downloading files faster
*
* Copyright (C) 2006 Tatsuhiro Tsujikawa
*
* 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
/* copyright --> */
#include "PreAllocationDiskWriter.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include "DlAbortEx.h"
PreAllocationDiskWriter::PreAllocationDiskWriter(unsigned long int size):AbstractDiskWriter(),size(size) {}
PreAllocationDiskWriter::~PreAllocationDiskWriter() {}
void PreAllocationDiskWriter::initAndOpenFile(string filename) {
createFile(filename, O_DIRECT);
int pageSize = getpagesize();
char* buf;
int size = pageSize*4;
int rt = posix_memalign((void**)&buf, pageSize, size);
if(rt != 0) {
throw new DlAbortEx(strerror(rt));
}
memset(buf, 0, size);
int x = size/4096;
int r = size%4096;
for(int i = 0; i < x; i++) {
if(write(fd, buf, size) < 0) {
free(buf);
throw new DlAbortEx(strerror(errno));
}
}
free(buf);
closeFile();
openExistingFile(filename);
char cbuf[4096];
memset(cbuf, 0, sizeof(cbuf));
if(write(fd, cbuf, r) < 0) {
throw new DlAbortEx(strerror(errno));
}
}
void PreAllocationDiskWriter::writeData(const char* data, int len, unsigned long int offset) {
int x = lseek(fd, offset, SEEK_SET);
// TODO check the return value of write
writeDataInternal(data, len);
}
|
