126 lines
4.3 KiB
C++
126 lines
4.3 KiB
C++
/*
|
|
|
|
Copyright (c) 2013, Project OSRM, Dennis Luxen, others
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without modification,
|
|
are permitted provided that the following conditions are met:
|
|
|
|
Redistributions of source code must retain the above copyright notice, this list
|
|
of conditions and the following disclaimer.
|
|
Redistributions in binary form must reproduce the above copyright notice, this
|
|
list of conditions and the following disclaimer in the documentation and/or
|
|
other materials provided with the distribution.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
|
|
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
|
|
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
|
|
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
|
|
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
|
|
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
|
|
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
#ifndef TEMPORARYSTORAGE_H_
|
|
#define TEMPORARYSTORAGE_H_
|
|
|
|
#include <vector>
|
|
#include <fstream>
|
|
|
|
#include <boost/assert.hpp>
|
|
#include <boost/foreach.hpp>
|
|
#include <boost/filesystem.hpp>
|
|
#include <boost/filesystem/fstream.hpp>
|
|
#include <boost/shared_ptr.hpp>
|
|
#include <boost/thread/mutex.hpp>
|
|
|
|
#include "../Util/OSRMException.h"
|
|
#include "../Util/SimpleLogger.h"
|
|
#include "../typedefs.h"
|
|
|
|
//This is one big workaround for latest boost renaming woes.
|
|
|
|
#if BOOST_FILESYSTEM_VERSION < 3
|
|
#warning Boost Installation with Filesystem3 missing, activating workaround
|
|
#include <cstdio>
|
|
namespace boost {
|
|
namespace filesystem {
|
|
inline path temp_directory_path() {
|
|
char * buffer;
|
|
buffer = tmpnam (NULL);
|
|
|
|
return path(buffer);
|
|
}
|
|
|
|
inline path unique_path(const path&) {
|
|
return temp_directory_path();
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifndef BOOST_FILESYSTEM_VERSION
|
|
#define BOOST_FILESYSTEM_VERSION 3
|
|
#endif
|
|
/**
|
|
* This class implements a singleton file storage for temporary data.
|
|
* temporary slots can be accessed by other objects through an int
|
|
* On deallocation every slot gets deallocated
|
|
*
|
|
* Access is sequential, which means, that there is no random access
|
|
* -> Data is written in first phase and reread in second.
|
|
*/
|
|
|
|
static boost::filesystem::path tempDirectory;
|
|
static std::string TemporaryFilePattern("OSRM-%%%%-%%%%-%%%%");
|
|
class TemporaryStorage {
|
|
public:
|
|
static TemporaryStorage & GetInstance();
|
|
virtual ~TemporaryStorage();
|
|
|
|
int allocateSlot();
|
|
void deallocateSlot(int slotID);
|
|
void writeToSlot(int slotID, char * pointer, std::streamsize size);
|
|
void readFromSlot(int slotID, char * pointer, std::streamsize size);
|
|
//returns the number of free bytes
|
|
unsigned getFreeBytesOnTemporaryDevice();
|
|
boost::filesystem::fstream::pos_type tell(int slotID);
|
|
void seek(int slotID, boost::filesystem::fstream::pos_type);
|
|
void removeAll();
|
|
private:
|
|
TemporaryStorage();
|
|
TemporaryStorage(TemporaryStorage const &){};
|
|
TemporaryStorage& operator=(TemporaryStorage const &) {
|
|
return *this;
|
|
}
|
|
void abort(boost::filesystem::filesystem_error& e);
|
|
|
|
struct StreamData {
|
|
bool writeMode;
|
|
boost::filesystem::path pathToTemporaryFile;
|
|
boost::shared_ptr<boost::filesystem::fstream> streamToTemporaryFile;
|
|
boost::shared_ptr<boost::mutex> readWriteMutex;
|
|
StreamData() :
|
|
writeMode(true),
|
|
pathToTemporaryFile (boost::filesystem::unique_path(tempDirectory.append(TemporaryFilePattern.begin(), TemporaryFilePattern.end()))),
|
|
streamToTemporaryFile(new boost::filesystem::fstream(pathToTemporaryFile, std::ios::in | std::ios::out | std::ios::trunc | std::ios::binary)),
|
|
readWriteMutex(new boost::mutex)
|
|
{
|
|
if(streamToTemporaryFile->fail()) {
|
|
throw OSRMException("temporary file could not be created");
|
|
}
|
|
}
|
|
};
|
|
//vector of file streams that is used to store temporary data
|
|
std::vector<StreamData> vectorOfStreamDatas;
|
|
boost::mutex mutex;
|
|
};
|
|
|
|
#endif /* TEMPORARYSTORAGE_H_ */
|