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IOTask.hpp
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IOTask.hpp
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/* Copyright 2017-2021 Fabian Koller
*
* This file is part of openPMD-api.
*
* openPMD-api is free software: you can redistribute it and/or modify
* it under the terms of of either the GNU General Public License or
* the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* openPMD-api 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 General Public License and the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU General Public License
* and the GNU Lesser General Public License along with openPMD-api.
* If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "openPMD/ChunkInfo.hpp"
#include "openPMD/Dataset.hpp"
#include "openPMD/IterationEncoding.hpp"
#include "openPMD/Streaming.hpp"
#include "openPMD/auxiliary/Export.hpp"
#include "openPMD/auxiliary/Memory.hpp"
#include "openPMD/auxiliary/Variant.hpp"
#include "openPMD/backend/Attribute.hpp"
#include "openPMD/backend/ParsePreference.hpp"
#include <cstddef>
#include <map>
#include <memory>
#include <string>
#include <utility>
#include <variant>
#include <vector>
namespace openPMD
{
class Attributable;
class Writable;
Writable *getWritable(Attributable *);
/** Type of IO operation between logical and persistent data.
*/
OPENPMDAPI_EXPORT_ENUM_CLASS(Operation){
CREATE_FILE,
CHECK_FILE,
OPEN_FILE,
CLOSE_FILE,
DELETE_FILE,
CREATE_PATH,
CLOSE_PATH,
OPEN_PATH,
DELETE_PATH,
LIST_PATHS,
CREATE_DATASET,
EXTEND_DATASET,
OPEN_DATASET,
DELETE_DATASET,
WRITE_DATASET,
READ_DATASET,
LIST_DATASETS,
GET_BUFFER_VIEW,
DELETE_ATT,
WRITE_ATT,
READ_ATT,
LIST_ATTS,
ADVANCE,
AVAILABLE_CHUNKS, //!< Query chunks that can be loaded in a dataset
DEREGISTER, //!< Inform the backend that an object has been deleted.
TOUCH, //!< tell the backend that the file is to be considered active
SET_WRITTEN //!< tell backend to consider a file written / not written
}; // note: if you change the enum members here, please update
// docs/source/dev/design.rst
namespace internal
{
/*
* The returned strings are compile-time constants, so no worries about
* pointer validity.
*/
OPENPMDAPI_EXPORT std::string operationAsString(Operation);
} // namespace internal
struct OPENPMDAPI_EXPORT AbstractParameter
{
virtual ~AbstractParameter() = default;
AbstractParameter() = default;
virtual std::unique_ptr<AbstractParameter> to_heap() && = 0;
protected:
// avoid object slicing
// by allow only child classes to use these things for defining their own
// copy/move constructors/assignment operators
AbstractParameter(const AbstractParameter &) = default;
AbstractParameter &operator=(const AbstractParameter &) = default;
AbstractParameter(AbstractParameter &&) = default;
AbstractParameter &operator=(AbstractParameter &&) = default;
};
/** @brief Typesafe description of all required arguments for a specified
* Operation.
*
* @note Input operations (i.e. ones that transfer data from persistent files
* to logical representations in openPMD-api) use shared pointers to
* indicate shared ownership of the resource. The pointer will only be
* valid after the Operation has completed.
* @tparam Operation Type of Operation to be executed.
*/
template <Operation>
struct OPENPMDAPI_EXPORT Parameter : public AbstractParameter
{
Parameter() = delete;
Parameter(Parameter const &) = delete;
Parameter(Parameter &&) = delete;
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CREATE_FILE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CREATE_FILE>(std::move(*this)));
}
std::string name = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CHECK_FILE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CHECK_FILE>(std::move(*this)));
}
std::string name = "";
enum class FileExists
{
DontKnow,
Yes,
No
};
std::shared_ptr<FileExists> fileExists =
std::make_shared<FileExists>(FileExists::DontKnow);
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::OPEN_FILE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::OPEN_FILE>(std::move(*this)));
}
std::string name = "";
using ParsePreference = internal::ParsePreference;
std::shared_ptr<ParsePreference> out_parsePreference =
std::make_shared<ParsePreference>(ParsePreference::UpFront);
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CLOSE_FILE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CLOSE_FILE>(std::move(*this)));
}
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::DELETE_FILE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::DELETE_FILE>(std::move(*this)));
}
std::string name = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CREATE_PATH>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CREATE_PATH>(std::move(*this)));
}
std::string path = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CLOSE_PATH>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CLOSE_PATH>(std::move(*this)));
}
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::OPEN_PATH>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::OPEN_PATH>(std::move(*this)));
}
std::string path = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::DELETE_PATH>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::DELETE_PATH>(std::move(*this)));
}
std::string path = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::LIST_PATHS>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::LIST_PATHS>(std::move(*this)));
}
std::shared_ptr<std::vector<std::string>> paths =
std::make_shared<std::vector<std::string>>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::CREATE_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::CREATE_DATASET>(std::move(*this)));
}
std::string name = "";
Extent extent = {};
Datatype dtype = Datatype::UNDEFINED;
std::string options = "{}";
std::optional<size_t> joinedDimension;
/** Warn about unused JSON paramters
*
* Template parameter so we don't have to include the JSON lib here.
* This function is useful for the createDataset() methods in,
* IOHandlerImpl's, so putting that here is the simplest way to make it
* available for them. */
template <typename TracingJSON>
static void warnUnusedParameters(
TracingJSON &,
std::string const ¤tBackendName,
std::string const &warningMessage);
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::EXTEND_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::EXTEND_DATASET>(std::move(*this)));
}
Extent extent = {};
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::OPEN_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::OPEN_DATASET>(std::move(*this)));
}
std::string name = "";
std::shared_ptr<Datatype> dtype = std::make_shared<Datatype>();
std::shared_ptr<Extent> extent = std::make_shared<Extent>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::DELETE_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::DELETE_DATASET>(std::move(*this)));
}
std::string name = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::WRITE_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = delete;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = delete;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::WRITE_DATASET>(std::move(*this)));
}
Extent extent = {};
Offset offset = {};
Datatype dtype = Datatype::UNDEFINED;
auxiliary::WriteBuffer data;
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::READ_DATASET>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::READ_DATASET>(std::move(*this)));
}
Extent extent = {};
Offset offset = {};
Datatype dtype = Datatype::UNDEFINED;
std::shared_ptr<void> data = nullptr;
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::LIST_DATASETS>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::LIST_DATASETS>(std::move(*this)));
}
std::shared_ptr<std::vector<std::string>> datasets =
std::make_shared<std::vector<std::string>>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::GET_BUFFER_VIEW>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::GET_BUFFER_VIEW>(std::move(*this)));
}
// in parameters
Offset offset;
Extent extent;
Datatype dtype = Datatype::UNDEFINED;
bool update = false;
// out parameters
struct OutParameters
{
bool backendManagedBuffer = false;
unsigned viewIndex = 0;
void *ptr = nullptr;
};
std::shared_ptr<OutParameters> out = std::make_shared<OutParameters>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::DELETE_ATT>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::DELETE_ATT>(std::move(*this)));
}
std::string name = "";
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::WRITE_ATT>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::WRITE_ATT>(std::move(*this)));
}
std::string name = "";
Datatype dtype = Datatype::UNDEFINED;
/*
* If true, this attribute changes across IO steps.
* It should only be written in backends that support IO steps,
* otherwise writing should be skipped.
* The frontend is responsible for handling both situations.
*/
enum class ChangesOverSteps
{
No,
Yes,
IfPossible
};
ChangesOverSteps changesOverSteps = ChangesOverSteps::No;
Attribute::resource resource;
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::READ_ATT>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::READ_ATT>(std::move(*this)));
}
std::string name = "";
std::shared_ptr<Datatype> dtype = std::make_shared<Datatype>();
std::shared_ptr<Attribute::resource> resource =
std::make_shared<Attribute::resource>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::LIST_ATTS>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::LIST_ATTS>(std::move(*this)));
}
std::shared_ptr<std::vector<std::string>> attributes =
std::make_shared<std::vector<std::string>>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::ADVANCE>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::ADVANCE>(std::move(*this)));
}
//! input parameter
AdvanceMode mode;
bool isThisStepMandatory = false;
//! output parameter
std::shared_ptr<AdvanceStatus> status =
std::make_shared<AdvanceStatus>(AdvanceStatus::OK);
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::AVAILABLE_CHUNKS>
: public AbstractParameter
{
Parameter() = default;
Parameter(Parameter &&) = default;
Parameter(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::unique_ptr<AbstractParameter>(
new Parameter<Operation::AVAILABLE_CHUNKS>(std::move(*this)));
}
// output parameter
std::shared_ptr<ChunkTable> chunks = std::make_shared<ChunkTable>();
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::DEREGISTER>
: public AbstractParameter
{
Parameter(void const *ptr_in) : former_parent(ptr_in)
{}
Parameter(Parameter const &) = default;
Parameter(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::make_unique<Parameter<Operation::DEREGISTER>>(
std::move(*this));
}
// Just for verbose logging.
void const *former_parent = nullptr;
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::TOUCH> : public AbstractParameter
{
explicit Parameter() = default;
Parameter(Parameter const &) = default;
Parameter(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::make_unique<Parameter<Operation::TOUCH>>(std::move(*this));
}
};
template <>
struct OPENPMDAPI_EXPORT Parameter<Operation::SET_WRITTEN>
: public AbstractParameter
{
explicit Parameter() = default;
Parameter(Parameter const &) = default;
Parameter(Parameter &&) = default;
Parameter &operator=(Parameter const &) = default;
Parameter &operator=(Parameter &&) = default;
std::unique_ptr<AbstractParameter> to_heap() && override
{
return std::make_unique<Parameter<Operation::SET_WRITTEN>>(
std::move(*this));
}
bool target_status = false;
};
/** @brief Self-contained description of a single IO operation.
*
* Contained are
* 1) the parameters to
* 2) a single atomic file Operation on the
* 3) concrete Writable object corresponding to both a local representation in
* openPMD-api and a persistent object in a file on disk
*/
class OPENPMDAPI_EXPORT IOTask
{
public:
/** Constructor for self-contained description of single IO operation.
*
* @tparam op Type of Operation to be executed.
* @param w Writable indicating the location of the object being
* operated on.
* @param p Parameter object supplying all required input and/or output
* parameters to the operation.
*/
template <Operation op>
explicit IOTask(Writable *w, Parameter<op> p)
: writable{w}, operation{op}, parameter{std::move(p).to_heap()}
{}
template <Operation op>
explicit IOTask(Attributable *a, Parameter<op> p)
: writable{getWritable(a)}
, operation{op}
, parameter{std::move(p).to_heap()}
{}
IOTask(IOTask const &other);
IOTask(IOTask &&other) noexcept;
IOTask &operator=(IOTask const &other);
IOTask &operator=(IOTask &&other) noexcept;
Writable *writable;
Operation operation;
std::shared_ptr<AbstractParameter> parameter;
}; // IOTask
} // namespace openPMD