/usr/include/mongo/util/optime.h is in mongodb-dev 1:2.4.9-1ubuntu2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 | // optime.h - OpTime class
/* Copyright 2009 10gen Inc.
*
* Licensed 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.
*/
#pragma once
#include <boost/thread/condition.hpp>
namespace mongo {
struct ClockSkewException : public DBException {
ClockSkewException() : DBException( "clock skew exception" , 20001 ) {}
};
/* replsets used to use RSOpTime.
M/S uses OpTime.
But this is useable from both.
*/
typedef unsigned long long ReplTime;
/* Operation sequence #. A combination of current second plus an ordinal value.
*/
#pragma pack(4)
class OpTime {
unsigned i; // ordinal comes first so we can do a single 64 bit compare on little endian
unsigned secs;
static OpTime last;
static OpTime skewed();
public:
static void setLast(const Date_t &date) {
mutex::scoped_lock lk(m);
last = OpTime(date);
notifier.notify_all();
}
static void setLast(const OpTime &new_last) {
mutex::scoped_lock lk(m);
last = new_last;
notifier.notify_all();
}
unsigned getSecs() const {
return secs;
}
unsigned getInc() const {
return i;
}
OpTime(Date_t date) {
reinterpret_cast<unsigned long long&>(*this) = date.millis;
dassert( (int)secs >= 0 );
}
OpTime(ReplTime x) {
reinterpret_cast<unsigned long long&>(*this) = x;
dassert( (int)secs >= 0 );
}
OpTime(unsigned a, unsigned b) {
secs = a;
i = b;
dassert( (int)secs >= 0 );
}
OpTime( const OpTime& other ) {
secs = other.secs;
i = other.i;
dassert( (int)secs >= 0 );
}
OpTime() {
secs = 0;
i = 0;
}
// it isn't generally safe to not be locked for this. so use now(). some tests use this.
static OpTime _now();
static mongo::mutex m;
static OpTime now(const mongo::mutex::scoped_lock&);
static OpTime getLast(const mongo::mutex::scoped_lock&);
// Waits for global OpTime to be different from *this
void waitForDifferent(unsigned millis);
/* We store OpTime's in the database as BSON Date datatype -- we needed some sort of
64 bit "container" for these values. While these are not really "Dates", that seems a
better choice for now than say, Number, which is floating point. Note the BinData type
is perhaps the cleanest choice, lacking a true unsigned64 datatype, but BinData has 5
bytes of overhead.
*/
unsigned long long asDate() const {
return reinterpret_cast<const unsigned long long*>(&i)[0];
}
long long asLL() const {
return reinterpret_cast<const long long*>(&i)[0];
}
bool isNull() const { return secs == 0; }
string toStringLong() const {
char buf[64];
time_t_to_String(secs, buf);
stringstream ss;
ss << time_t_to_String_short(secs) << ' ';
ss << hex << secs << ':' << i;
return ss.str();
}
string toStringPretty() const {
stringstream ss;
ss << time_t_to_String_short(secs) << ':' << hex << i;
return ss.str();
}
string toString() const {
stringstream ss;
ss << hex << secs << ':' << i;
return ss.str();
}
bool operator==(const OpTime& r) const {
return i == r.i && secs == r.secs;
}
bool operator!=(const OpTime& r) const {
return !(*this == r);
}
bool operator<(const OpTime& r) const {
if ( secs != r.secs )
return secs < r.secs;
return i < r.i;
}
bool operator<=(const OpTime& r) const {
return *this < r || *this == r;
}
bool operator>(const OpTime& r) const {
return !(*this <= r);
}
bool operator>=(const OpTime& r) const {
return !(*this < r);
}
private:
static boost::condition notifier;
};
#pragma pack()
} // namespace mongo
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