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Copy pathModule.cpp
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171 lines (132 loc) · 2.87 KB
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#include "Module.h"
#include <iostream>
namespace HttpServer
{
Module::Module(): lib_handle(nullptr)
{
}
Module::Module(const std::string &libPath): lib_handle(nullptr)
{
open(libPath);
}
Module::Module(const Module &obj) : lib_handle(obj.lib_handle)
{
}
Module::Module(Module &&obj) : lib_handle(obj.lib_handle)
{
obj.lib_handle = nullptr;
}
bool Module::open(const std::string &libPath)
{
if (is_open() )
{
close();
}
#ifdef WIN32
const size_t pos_slash = libPath.rfind('\\');
const size_t pos_slash_back = libPath.rfind('/');
size_t pos = std::string::npos;
if (pos_slash != std::string::npos && pos_slash > pos_slash_back)
{
pos = pos_slash;
}
else if (pos_slash_back != std::string::npos)
{
pos = pos_slash_back;
}
DLL_DIRECTORY_COOKIE cookie = nullptr;
if (std::string::npos != pos)
{
std::wstring directory(libPath.cbegin(), libPath.cbegin() + pos + 1);
cookie = ::AddDllDirectory(directory.data() );
}
lib_handle = ::LoadLibraryEx(libPath.c_str(), 0, LOAD_LIBRARY_SEARCH_DEFAULT_DIRS);
if (cookie)
{
::RemoveDllDirectory(cookie);
}
#elif POSIX
lib_handle = ::dlopen(libPath.c_str(), RTLD_NOW | RTLD_LOCAL);
#else
#error "Undefine platform"
#endif
if (nullptr == lib_handle)
{
#ifdef POSIX
std::cout << ::dlerror() << std::endl;
#endif
return false;
}
return true;
}
void Module::close()
{
if (lib_handle)
{
#ifdef WIN32
::FreeLibrary(lib_handle);
#elif POSIX
::dlclose(lib_handle);
#else
#error "Undefine platform"
#endif
lib_handle = nullptr;
}
}
bool Module::find(const std::string &symbolName, void *(**addr)(void *) ) const
{
if (lib_handle)
{
#ifdef WIN32
*addr = reinterpret_cast<void *(*)(void *)>(::GetProcAddress(lib_handle, symbolName.c_str() ) );
return nullptr != *addr;
#elif POSIX
char *error = ::dlerror();
*addr = reinterpret_cast<void *(*)(void *)>(::dlsym(lib_handle, symbolName.c_str() ) );
error = ::dlerror();
return nullptr == error;
#else
#error "Undefine platform"
#endif
}
return false;
}
bool Module::find(const char *symbolName, void *(**addr)(void *) ) const
{
if (lib_handle)
{
#ifdef WIN32
*addr = reinterpret_cast<void *(*)(void *)>(::GetProcAddress(lib_handle, symbolName) );
return nullptr != *addr;
#elif POSIX
char *error = ::dlerror();
*addr = reinterpret_cast<void *(*)(void *)>(::dlsym(lib_handle, symbolName) );
error = ::dlerror();
return nullptr == error;
#else
#error "Undefine platform"
#endif
}
return false;
}
Module &Module::operator =(const Module &obj)
{
if (*this != obj)
{
close();
lib_handle = obj.lib_handle;
}
return *this;
}
Module &Module::operator =(Module &&obj)
{
if (*this != obj)
{
close();
lib_handle = obj.lib_handle;
obj.lib_handle = nullptr;
}
return *this;
}
};