mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-21 14:44:36 +01:00
b0581433a7
fix: remove executable flag and change back to 100644 (was 100755) Signed-off-by: Roger Meier <r.meier@siemens.com>
145 lines
2.6 KiB
C++
145 lines
2.6 KiB
C++
//
|
|
// UUIDGenerator.cpp
|
|
//
|
|
// $Id: //poco/1.4/Foundation/src/UUIDGenerator.cpp#1 $
|
|
//
|
|
// Library: Foundation
|
|
// Package: UUID
|
|
// Module: UUID
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#include "Poco/UUIDGenerator.h"
|
|
#include "Poco/Thread.h"
|
|
#include "Poco/RandomStream.h"
|
|
#include "Poco/DigestEngine.h"
|
|
#include "Poco/MD5Engine.h"
|
|
#include "Poco/SingletonHolder.h"
|
|
#include <cstring>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
UUIDGenerator::UUIDGenerator(): _ticks(0), _haveNode(false)
|
|
{
|
|
}
|
|
|
|
|
|
UUIDGenerator::~UUIDGenerator()
|
|
{
|
|
}
|
|
|
|
|
|
UUID UUIDGenerator::create()
|
|
{
|
|
FastMutex::ScopedLock lock(_mutex);
|
|
|
|
if (!_haveNode)
|
|
{
|
|
Environment::nodeId(_node);
|
|
_haveNode = true;
|
|
}
|
|
Timestamp::UtcTimeVal tv = timeStamp();
|
|
UInt32 timeLow = UInt32(tv & 0xFFFFFFFF);
|
|
UInt16 timeMid = UInt16((tv >> 32) & 0xFFFF);
|
|
UInt16 timeHiAndVersion = UInt16((tv >> 48) & 0x0FFF) + (UUID::UUID_TIME_BASED << 12);
|
|
UInt16 clockSeq = (UInt16(_random.next() >> 4) & 0x3FFF) | 0x8000;
|
|
return UUID(timeLow, timeMid, timeHiAndVersion, clockSeq, _node);
|
|
}
|
|
|
|
|
|
UUID UUIDGenerator::createFromName(const UUID& nsid, const std::string& name)
|
|
{
|
|
MD5Engine md5;
|
|
return createFromName(nsid, name, md5);
|
|
}
|
|
|
|
|
|
UUID UUIDGenerator::createFromName(const UUID& nsid, const std::string& name, DigestEngine& de)
|
|
{
|
|
poco_assert_dbg (de.digestLength() >= 16);
|
|
|
|
UUID netNsid = nsid;
|
|
netNsid.toNetwork();
|
|
de.reset();
|
|
de.update(&netNsid._timeLow, sizeof(netNsid._timeLow));
|
|
de.update(&netNsid._timeMid, sizeof(netNsid._timeMid));
|
|
de.update(&netNsid._timeHiAndVersion, sizeof(netNsid._timeHiAndVersion));
|
|
de.update(&netNsid._clockSeq, sizeof(netNsid._clockSeq));
|
|
de.update(&netNsid._node[0], sizeof(netNsid._node));
|
|
de.update(name);
|
|
char buffer[16];
|
|
const DigestEngine::Digest& d = de.digest();
|
|
for (int i = 0; i < 16; ++i)
|
|
{
|
|
buffer[i] = d[i];
|
|
}
|
|
return UUID(buffer, UUID::UUID_NAME_BASED);
|
|
}
|
|
|
|
|
|
UUID UUIDGenerator::createRandom()
|
|
{
|
|
char buffer[16];
|
|
RandomInputStream ris;
|
|
ris.read(buffer, sizeof(buffer));
|
|
return UUID(buffer, UUID::UUID_RANDOM);
|
|
}
|
|
|
|
|
|
Timestamp::UtcTimeVal UUIDGenerator::timeStamp()
|
|
{
|
|
Timestamp now;
|
|
for (;;)
|
|
{
|
|
if (now != _lastTime)
|
|
{
|
|
_lastTime = now;
|
|
_ticks = 0;
|
|
break;
|
|
}
|
|
if (_ticks < 100)
|
|
{
|
|
++_ticks;
|
|
break;
|
|
}
|
|
now.update();
|
|
}
|
|
Timestamp::UtcTimeVal tv = now.utcTime();
|
|
return tv + _ticks;
|
|
}
|
|
|
|
|
|
UUID UUIDGenerator::createOne()
|
|
{
|
|
try
|
|
{
|
|
return create();
|
|
}
|
|
catch (Exception&)
|
|
{
|
|
return createRandom();
|
|
}
|
|
}
|
|
|
|
|
|
namespace
|
|
{
|
|
static SingletonHolder<UUIDGenerator> sh;
|
|
}
|
|
|
|
|
|
UUIDGenerator& UUIDGenerator::defaultGenerator()
|
|
{
|
|
return *sh.get();
|
|
}
|
|
|
|
|
|
} // namespace Poco
|