HepMC3 event record library
ReaderPlugin.cc
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1 // -*- C++ -*-
2 //
3 // This file is part of HepMC
4 // Copyright (C) 2014-2019 The HepMC collaboration (see AUTHORS for details)
5 //
6 ///
7 /// @file ReaderPlugin.cc
8 /// @brief Implementation of \b class ReaderPlugin
9 ///
10 #ifdef WIN32
11 #define WIN32_LEAN_AND_MEAN
12 #define NOWINBASEINTERLOCK
13 #define NOMINMAX
14 #undef UNICODE
15 #include <intrin.h>
16 #include <windows.h>
17 #endif
18 #if defined(__linux__) || defined(__darwin__)
19 #include <dlfcn.h>
20 #endif
21 #include <cstring>
22 #include <sstream>
23 #include "HepMC3/ReaderPlugin.h"
24 #include "HepMC3/GenEvent.h"
25 
26 namespace HepMC3 {
27 
28 ReaderPlugin::ReaderPlugin(std::istream & stream,const std::string &libname, const std::string &newreader) {
29 
30 #ifdef WIN32
31  dll_handle=nullptr;
32  dll_handle = LoadLibrary(libname.c_str());
33  if (!dll_handle) { printf("Error while loading library %s. Error code %i\n",libname.c_str(),GetLastError()); m_reader=nullptr; return; }
34  typedef Reader* (__stdcall *f_funci)(std::istream & stream);
35  f_funci newReader = (f_funci)GetProcAddress((HINSTANCE)(dll_handle), newreader.c_str());
36  if (!newReader) { printf("Error while loading function %s from library %s. Error code %i\n",newreader.c_str(),libname.c_str(),GetLastError()); m_reader=nullptr; return; }
37  m_reader=(Reader*)(newReader(stream));
38 #endif
39 
40 #if defined(__linux__) || defined(__darwin__)
41  dll_handle=nullptr;
42  dll_handle = dlopen(libname.c_str(), RTLD_LAZY | RTLD_GLOBAL);
43  if (!dll_handle) { printf("Error while loading library %s: %s\n",libname.c_str(),dlerror()); m_reader=nullptr; return; }
44  Reader* (*newReader)(std::istream & stream);
45  newReader=(Reader* (*)(std::istream & stream))dlsym(dll_handle, newreader.c_str());
46  if (!newReader) { printf("Error while loading function %s from library %s: %s\n",newreader.c_str(),libname.c_str(),dlerror()); m_reader=nullptr; return; }
47  m_reader=(Reader*)(newReader(stream));
48 #endif
49 
50 }
51 /** @brief Constructor */
52 ReaderPlugin::ReaderPlugin(const std::string& filename,const std::string &libname, const std::string &newreader) {
53 
54 #ifdef WIN32
55  dll_handle=nullptr;
56  dll_handle = LoadLibrary(libname.c_str());
57  if (!dll_handle) { printf("Error while loading library %s. Error code %i\n",libname.c_str(),GetLastError()); m_reader=nullptr; return; }
58  typedef Reader* (__stdcall *f_funci)(const std::string&);
59  f_funci newReader = (f_funci)GetProcAddress((HINSTANCE)(dll_handle), newreader.c_str());
60  if (!newReader) { printf("Error while loading function %s from library %s. Error code %i\n",newreader.c_str(),libname.c_str(),GetLastError()); m_reader=nullptr; return; }
61  m_reader=(Reader*)(newReader(filename));
62 #endif
63 
64 #if defined(__linux__) || defined(__darwin__)
65  dll_handle=nullptr;
66  dll_handle = dlopen(libname.c_str(), RTLD_LAZY | RTLD_GLOBAL);
67  if (!dll_handle) { printf("Error while loading library %s: %s\n",libname.c_str(),dlerror()); m_reader=nullptr; return; }
68  Reader* (*newReader)(const std::string&);
69  newReader=(Reader* (*)(const std::string&))dlsym(dll_handle, newreader.c_str());
70  if (!newReader) { printf("Error while loading function %s from library %s: %s\n",newreader.c_str(),libname.c_str(),dlerror()); m_reader=nullptr; return; }
71  m_reader=(Reader*)(newReader(filename));
72 #endif
73 }
75  if (m_reader) m_reader->close();
76  if (m_reader) delete m_reader;
77 #ifdef WIN32
78  if(dll_handle) {
79  FreeLibrary((HINSTANCE)(dll_handle));
80  }
81 #endif
82 #if defined(__linux__) || defined(__darwin__)
83  if(dll_handle) {
84  dlclose(dll_handle);
85  dll_handle = nullptr;
86  }
87 #endif
88 }
89 } // namespace HepMC3
virtual void close()=0
Close file and/or stream.
~ReaderPlugin() override
Destructor.
Definition: ReaderPlugin.cc:74
Reader * m_reader
The actual reader.
Definition: ReaderPlugin.h:39
void * dll_handle
library handler
Definition: ReaderPlugin.h:40
Definition of class ReaderPlugin.
Definition of class GenEvent.
ReaderPlugin(std::istream &stream, const std::string &libname, const std::string &newreader)
Constructor to read from stream.
Definition: ReaderPlugin.cc:28
Base class for all I/O readers.
Definition: Reader.h:25