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/*
* Distributed under the OSI-approved Apache License, Version 2.0. See
* accompanying file Copyright.txt for details.
*
* ExampleReadPlugin.h Simple file reading engine for reading files written by
* the ExampleWritePlugin engine. Looks for directory
* (called "ExamplePlugin" by default, but can be changed with engine parameter
* "DirName") and reads variable info from vars.txt and actual data from
* data.txt.
*
* Created on: Jul 5, 2021
* Author: Caitlin Ross <caitlin.ross@kitware.com>
*/
#ifndef EXAMPLEREADPLUGIN_H_
#define EXAMPLEREADPLUGIN_H_
#include "plugin_engine_read_export.h"
#include <fstream>
#include <string>
#include "adios2/common/ADIOSMacros.h"
#include "adios2/common/ADIOSTypes.h"
#include "adios2/core/IO.h"
#include "adios2/engine/plugin/PluginEngineInterface.h"
#include "adios2/helper/adiosComm.h"
#include "adios2/helper/adiosString.h"
namespace adios2
{
namespace plugin
{
/** An engine interface to be used by the plugin infrastructure */
class ExampleReadPlugin : public PluginEngineInterface
{
public:
ExampleReadPlugin(core::IO &io, const std::string &name, const Mode openMode,
helper::Comm comm);
virtual ~ExampleReadPlugin();
/** Indicates beginning of a step **/
StepStatus BeginStep(StepMode mode = StepMode::Read,
const float timeoutSeconds = -1.0) override;
/** Indicates end of a step **/
void EndStep() override;
/** Return the current step **/
size_t CurrentStep() const override;
/** Execute deferred mode Gets **/
void PerformGets() override;
protected:
void Init() override;
#define declare(T) \
void DoGetSync(core::Variable<T> &variable, T *values) override; \
void DoGetDeferred(core::Variable<T> &variable, T *values) override;
ADIOS2_FOREACH_STDTYPE_1ARG(declare)
#undef declare
void DoClose(const int transportIndex = -1) override;
private:
std::ifstream m_DataFile;
std::ifstream m_VarFile;
size_t m_CurrentStep = 0;
template <typename T>
void AddVariable(const std::string &name, Dims shape, Dims start, Dims count);
template <class T>
void ReadVariable(core::Variable<T> &variable, T *values);
};
} // end namespace plugin
} // end namespace adios2
extern "C" {
PLUGIN_ENGINE_READ_EXPORT adios2::plugin::ExampleReadPlugin *
EngineCreate(adios2::core::IO &io, const std::string &name, const adios2::Mode mode,
adios2::helper::Comm comm);
PLUGIN_ENGINE_READ_EXPORT void EngineDestroy(adios2::plugin::ExampleReadPlugin *obj);
}
#endif /* EXAMPLEREADPLUGIN_H_ */
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