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/*
* pluginTemplate.h
*
* Created on: Jul 27, 2011
* Author: christian
*/
#ifndef PLUGINTEMPLATE_H_
#define PLUGINTEMPLATE_H_
#include <iostream>
#include <stdio.h>
#include <dirent.h>
#include <dlfcn.h>
#include <libgen.h>
#include <unistd.h>
#include <string>
#include "audioManagerIncludes.h"
template<class T>T* getCreateFunction(std::string libname) {
// cut off directories
char* fileWithPath = const_cast<char*>(libname.c_str());
std::string libFileName = basename(fileWithPath);
// cut off "lib" in front and cut off .so end"
std::string createFunctionName = libFileName.substr(3, libFileName.length() - 6) + "Factory";
DLT_LOG(AudioManager,DLT_LOG_INFO, DLT_STRING("Lib entry point name "),DLT_STRING(createFunctionName.c_str()));
// open library
void *libraryHandle;
dlerror(); // Clear any existing error
libraryHandle = dlopen(libname.c_str(), RTLD_NOW /*LAZY*/);
const char* dlopen_error = dlerror();
if (!libraryHandle || dlopen_error)
{
DLT_LOG(AudioManager,DLT_LOG_INFO, DLT_STRING("dlopen failed"),DLT_STRING(dlopen_error));
return 0;
}
// get entry point from shared lib
dlerror(); // Clear any existing error
DLT_LOG(AudioManager,DLT_LOG_INFO, DLT_STRING("loading external function with name"),DLT_STRING(createFunctionName.c_str()));
union
{
void* voidPointer;
T* typedPointer;
} functionPointer;
// Note: direct cast is not allowed by ISO C++. e.g.
// T* createFunction = reinterpret_cast<T*>(dlsym(libraryHandle, createFunctionName.c_str()));
// compiler warning: "forbids casting between pointer-to-function and pointer-to-object"
functionPointer.voidPointer = dlsym(libraryHandle, createFunctionName.c_str());
T* createFunction = functionPointer.typedPointer;
const char* dlsym_error = dlerror();
if (!createFunction || dlsym_error)
{
DLT_LOG(AudioManager,DLT_LOG_INFO, DLT_STRING("Failed to load shared lib entry point"),DLT_STRING(dlsym_error));
}
return createFunction;
}
#endif /* PLUGINTEMPLATE_H_ */
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