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
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
#ifndef QPID_LINEARSTORE_JOURNAL_ENQ_REC_H
#define QPID_LINEARSTORE_JOURNAL_ENQ_REC_H
#include "qpid/linearstore/journal/jrec.h"
#include "qpid/linearstore/journal/utils/enq_hdr.h"
#include "qpid/linearstore/journal/utils/rec_tail.h"
namespace qpid {
namespace linearstore {
namespace journal {
/**
* \class enq_rec
* \brief Class to handle a single journal enqueue record.
*/
class enq_rec : public jrec
{
private:
::enq_hdr_t _enq_hdr; ///< Local instance of enqueue header struct
const void* _xidp; ///< xid pointer for encoding (for writing to disk)
const void* _data; ///< Pointer to data to be written to disk
void* _xid_buff;
void* _data_buff;
::rec_tail_t _enq_tail; ///< Local instance of enqueue tail struct
public:
enq_rec();
virtual ~enq_rec();
void reset(const uint64_t serial, const uint64_t rid, const void* const dbuf, const std::size_t dlen,
const void* const xidp, const std::size_t xidlen, const bool transient, const bool external);
uint32_t encode(void* wptr, uint32_t rec_offs_dblks, uint32_t max_size_dblks, Checksum& checksum);
bool decode(::rec_hdr_t& h, std::ifstream* ifsp, std::size_t& rec_offs, const std::streampos rec_start);
std::size_t get_xid(void** const xidpp);
std::size_t get_data(void** const datapp);
inline bool is_transient() const { return ::is_enq_transient(&_enq_hdr); }
inline bool is_external() const { return ::is_enq_external(&_enq_hdr); }
std::string& str(std::string& str) const;
inline std::size_t data_size() const { return _enq_hdr._dsize; }
inline std::size_t xid_size() const { return _enq_hdr._xidsize; }
std::size_t rec_size() const;
static std::size_t rec_size(const std::size_t xidsize, const std::size_t dsize, const bool external);
inline uint64_t rid() const { return _enq_hdr._rhdr._rid; }
void check_rec_tail(const std::streampos rec_start) const;
private:
virtual void clean();
};
}}}
#endif // ifndef QPID_LINEARSTORE_JOURNAL_ENQ_REC_H
|
