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/* Copyright 2009 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <boost/thread/condition.hpp>
#include <iostream>
#include <sstream>
#include "mongo/util/assert_util.h"
#include "mongo/util/concurrency/mutex.h"
#include "mongo/util/time_support.h"
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;
public:
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;
}
// Maximum OpTime value.
static OpTime max();
/* 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; }
std::string toStringLong() const {
std::stringstream ss;
ss << time_t_to_String_short(secs) << ' ';
ss << std::hex << secs << ':' << i;
return ss.str();
}
std::string toStringPretty() const {
std::stringstream ss;
ss << time_t_to_String_short(secs) << ':' << std::hex << i;
return ss.str();
}
std::string toString() const {
std::stringstream ss;
ss << std::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);
}
};
#pragma pack()
} // namespace mongo
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