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/* <!-- 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 "DlAbortEx.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
PreAllocationDiskWriter::PreAllocationDiskWriter(long long int totalLength)
:AbstractDiskWriter(),totalLength(totalLength) {}
PreAllocationDiskWriter::~PreAllocationDiskWriter() {}
void PreAllocationDiskWriter::initAndOpenFile(string filename) {
createFile(filename, O_DIRECT);
int pageSize = getpagesize();
int bufSize = pageSize*4;
char* buf;
int rt = posix_memalign((void**)&buf, pageSize, bufSize);
if(rt != 0) {
throw new DlAbortEx(strerror(rt));
}
try {
memset(buf, 0, bufSize);
long long int x = totalLength/bufSize;
int r = totalLength%bufSize;
for(long long int i = 0; i < x; i++) {
if(write(fd, buf, bufSize) < 0) {
throw new DlAbortEx(strerror(errno));
}
}
closeFile();
openExistingFile(filename);
if(r > 0) {
seek(totalLength-r);
if(write(fd, buf, r) < 0) {
throw new DlAbortEx(strerror(errno));
}
}
free(buf);
} catch(Exception* ex) {
free(buf);
throw;
}
}
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