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/**
* Dynamically Loaded Object
* (C) 2010 Jack Lloyd
*
* Distributed under the terms of the Botan license
*/
#include <botan/internal/dyn_load.h>
#include <botan/build.h>
#include <stdexcept>
#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
#include <dlfcn.h>
#endif
namespace Botan {
Dynamically_Loaded_Library::Dynamically_Loaded_Library(
const std::string& library) :
lib_name(library), lib(0)
{
#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
lib = ::dlopen(lib_name.c_str(), RTLD_LAZY);
if(!lib)
{
const char* dl_err = dlerror();
if(!dl_err)
dl_err = "Unknown error";
throw std::runtime_error("Failed to load engine " + lib_name + ": " +
dl_err);
}
#endif
}
Dynamically_Loaded_Library::~Dynamically_Loaded_Library()
{
#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
::dlclose(lib);
#endif
}
void* Dynamically_Loaded_Library::resolve_symbol(const std::string& symbol)
{
void* addr = 0;
#if defined(BOTAN_TARGET_OS_HAS_DLOPEN)
addr = ::dlsym(lib, symbol.c_str());
#endif
if(!addr)
throw std::runtime_error("Failed to resolve symbol " + symbol +
" in " + lib_name);
return addr;
}
}
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