1 /* <!-- copyright */
2 /*
3 * aria2 - The high speed download utility
4 *
5 * Copyright (C) 2012 Tatsuhiro Tsujikawa
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 *
21 * In addition, as a special exception, the copyright holders give
22 * permission to link the code of portions of this program with the
23 * OpenSSL library under certain conditions as described in each
24 * individual source file, and distribute linked combinations
25 * including the two.
26 * You must obey the GNU General Public License in all respects
27 * for all of the code used other than OpenSSL. If you modify
28 * file(s) with this exception, you may extend this exception to your
29 * version of the file(s), but you are not obligated to do so. If you
30 * do not wish to do so, delete this exception statement from your
31 * version. If you delete this exception statement from all source
32 * files in the program, then also delete it here.
33 */
34 /* copyright --> */
35 #include "WrDiskCacheEntry.h"
36
37 #include <cstring>
38
39 #include "DiskAdaptor.h"
40 #include "RecoverableException.h"
41 #include "DownloadFailureException.h"
42 #include "LogFactory.h"
43 #include "fmt.h"
44
45 namespace aria2 {
46
WrDiskCacheEntry(const std::shared_ptr<DiskAdaptor> & diskAdaptor)47 WrDiskCacheEntry::WrDiskCacheEntry(
48 const std::shared_ptr<DiskAdaptor>& diskAdaptor)
49 : sizeKey_(0),
50 lastUpdate_(0),
51 size_(0),
52 error_(CACHE_ERR_SUCCESS),
53 errorCode_(error_code::UNDEFINED),
54 diskAdaptor_(diskAdaptor)
55 {
56 }
57
~WrDiskCacheEntry()58 WrDiskCacheEntry::~WrDiskCacheEntry()
59 {
60 if (!set_.empty()) {
61 A2_LOG_WARN(fmt("WrDiskCacheEntry is not empty size=%lu",
62 static_cast<unsigned long>(size_)));
63 }
64 deleteDataCells();
65 }
66
deleteDataCells()67 void WrDiskCacheEntry::deleteDataCells()
68 {
69 for (auto& e : set_) {
70 delete[] e->data;
71 delete e;
72 }
73 set_.clear();
74 size_ = 0;
75 }
76
writeToDisk()77 void WrDiskCacheEntry::writeToDisk()
78 {
79 try {
80 diskAdaptor_->writeCache(this);
81 }
82 catch (RecoverableException& e) {
83 A2_LOG_ERROR_EX("Error when trying to flush write cache", e);
84 error_ = CACHE_ERR_ERROR;
85 errorCode_ = e.getErrorCode();
86 }
87 deleteDataCells();
88 }
89
clear()90 void WrDiskCacheEntry::clear() { deleteDataCells(); }
91
cacheData(DataCell * dataCell)92 bool WrDiskCacheEntry::cacheData(DataCell* dataCell)
93 {
94 A2_LOG_DEBUG(fmt("WrDiskCacheEntry cache goff=%" PRId64 ", len=%lu",
95 dataCell->goff, static_cast<unsigned long>(dataCell->len)));
96 if (set_.insert(dataCell).second) {
97 size_ += dataCell->len;
98 return true;
99 }
100 else {
101 return false;
102 }
103 }
104
append(int64_t goff,const unsigned char * data,size_t len)105 size_t WrDiskCacheEntry::append(int64_t goff, const unsigned char* data,
106 size_t len)
107 {
108 if (set_.empty()) {
109 return 0;
110 }
111 auto i = set_.end();
112 --i;
113 if (static_cast<int64_t>((*i)->goff + (*i)->len) == goff) {
114 size_t wlen = std::min((*i)->capacity - (*i)->len, len);
115 memcpy((*i)->data + (*i)->offset + (*i)->len, data, wlen);
116 (*i)->len += wlen;
117 size_ += wlen;
118 return wlen;
119 }
120 else {
121 return 0;
122 }
123 }
124
125 } // namespace aria2
126