DynamicCellModelLoader.cpp

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*/
 
#include "DynamicCellModelLoader.hpp"
#include "AbstractDynamicallyLoadableEntity.hpp"
 
#include <dlfcn.h>  // For dealing with .so files
#include <cassert>
 
#include "Exception.hpp"
 
DynamicCellModelLoaderPtr DynamicCellModelLoader::Create(const std::string& rLoadableModulePath)
{
    DynamicCellModelLoaderPtr p_loader(new DynamicCellModelLoader(rLoadableModulePath));
    return p_loader;
}
 
 
DynamicCellModelLoader::DynamicCellModelLoader(const std::string& rLoadableModulePath)
    : mLoadableModulePath(rLoadableModulePath)
{
    // Open the .so file
    mpDynamicModule = dlopen(rLoadableModulePath.c_str(), RTLD_NOW);
    if (mpDynamicModule == NULL)
    {
        EXCEPTION("Unable to load .so file '" + rLoadableModulePath + "': " + dlerror());
    }
 
    // Find the cell creation function
    dlerror(); // Reset errors
    void* p_creation_function = dlsym(mpDynamicModule, "MakeCardiacCell");
    // Check it exists
    const char* p_error = dlerror();
    if (p_error)
    {
        EXCEPTION("Failed to load cell creation function from .so file '" + rLoadableModulePath
                  + "': " + p_error);
    }
    // Cast to the right type
    mpCreationFunction = reinterpret_cast<CellCreationFunctionType*>(p_creation_function);
}
 
DynamicCellModelLoader::~DynamicCellModelLoader()
{
    if (mpDynamicModule)
    {
        dlclose(mpDynamicModule);
    }
}
 
AbstractCardiacCellInterface* DynamicCellModelLoader::CreateCell(boost::shared_ptr<AbstractIvpOdeSolver> pSolver,
                                                                 boost::shared_ptr<AbstractStimulusFunction> pStimulus)
{
    AbstractCardiacCellInterface* p_cell = (*mpCreationFunction)(pSolver, pStimulus);
 
    AbstractDynamicallyLoadableEntity* p_entity = dynamic_cast<AbstractDynamicallyLoadableEntity*>(p_cell);
    assert(p_entity != NULL);
    p_entity->SetLoader(shared_from_this());
 
    return p_cell;
}
 
const std::string DynamicCellModelLoader::GetLoadableModulePath() const
{
    return mLoadableModulePath;
}