Beam_10MeV_Photons.cc

//Beams_10MeV_Photons.cc - Basic, static beam qualities for a 10 MeV photon beam. 
//
//Programming notes:
//  -Do not make items here "const", because they will not show up when loading.
//  -Avoid using macro variables here because they will be obliterated during loading.
//  -Wrap dynamically-loaded code with extern "C", otherwise C++ compilation will mangle function names, etc.
//
// From man page for dlsym/dlopen:  For running some 'initialization' code prior to finishing loading:
// "Instead,  libraries  should  export  routines using the __attribute__((constructor)) and __attribute__((destructor)) function attributes.  See the gcc info pages for
//       information on these.  Constructor routines are executed before dlopen() returns, and destructor routines are executed before dlclose() returns."
//   ---for instance, we can use this to seed a random number generator with a random seed. However, in order to pass in a specific seed (and pass that seed to the library)
//      we need to define an explicitly callable initialization function. In general, these libraries should have both so that we can quickly adjust behaviour if desired.
//  

#include <iostream>
#include <string>
#include <vector>

#include <cmath>

#include "./Misc.h"
#include "./MyMath.h"

#include "./Constants.h"
#include "./Structs.h"

#ifdef __cplusplus
    extern "C" {
#endif

std::string MODULE_NAME(__FILE__);
std::string FILE_TYPE("BEAM");
std::string BEAM_TYPE("10MEV");

bool VERBOSE = false;



#ifdef __GNUG__
    __attribute__((constructor)) static void init_on_dynamic_load(void){
        //Do something automatic here.
        if(VERBOSE) FUNCINFO("Loaded lib_beam_10MeV_photons.so");
        return;
    }

    __attribute__((destructor)) static void cleanup_on_dynamic_unload(void){
        //Cleanup memory (if needed) automatically here.
        if(VERBOSE) FUNCINFO("Closed lib_beam_10MeV_photons.so");
        return;
    }
#else
    #warning Being compiled with non-gcc compiler. Unable to use gcc-specific function declarations like 'attribute.' Proceed at your own risk!
#endif 

void toggle_verbosity(bool in){
    VERBOSE = in;
    return;
}


//This function simply returns a perfect 10.0 MeV energy spectrum.
//
//It is suitable for determining the energy of photons which have been freshly created at an
// undescribed source.
//
//Units of energy: [E] = MeV.

//double energy_distribution(const double &in){
double energy_distribution(const struct Functions &Loaded_Functions){
    return 10.0;
}



#ifdef __cplusplus
    }
#endif